JP3439667B2 - Antenna device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device used in a wireless communication system, and more particularly to an invention of an antenna device capable of controlling a beam width and a tilt angle as needed with a simple control circuit.

[0002]

2. Description of the Related Art Conventionally, an antenna device has an antenna structure for controlling a vertical plane beam, and a phase shifter is provided in each antenna element to form a phased array antenna structure, whereby the vertical plane tilt angle is reduced. Those to control are known and commonly used. Further, in Japanese Patent Laid-Open No. 6-196927,
An antenna device in which the vertical plane tilt angle is variable by selectively using a plurality of antennas has been introduced.

FIG. 4 is a diagram showing the configuration of a vertical plane tilt angle switching antenna device introduced in the above publication. In this figure, 20 is an antenna element, 22 is a phase shifter, and 23
Is an input / output terminal, 24 is a power distributor, 25 is a main beam, 2
6 is an array antenna, 27 is a block array, and 2
Reference numeral 8 indicates a hybrid circuit. In this antenna device, antennas having different vertical plane tilt angles, such as the vertical plane tilt angles θt1 and θt2 of the main beams 25 shown by reference characters A and B in the figure, are formed by the block arrays 27, respectively. Different vertical plane tilt angles are obtained by arranging a plurality of antennas having vertical plane tilt angles and selectively using any of them.

[0004]

By the way, in the above-described antenna device having the phased array antenna structure, it is necessary to provide a phase shifter for each antenna element. Therefore, there is a problem that the whole antenna becomes large and a very complicated control circuit is required depending on the control mode. Further, basically, only the control of the vertical plane tilt angle is performed by the same antenna device, and it is difficult to make the beam width variable.

On the other hand, in the antenna device of the above publication, different vertical plane tilt angles are obtained by switching the antennas to be used. Therefore, the antennas must be prepared according to the required number of vertical plane tilt angles. . Therefore, this antenna device has a problem that the larger the required number of vertical plane tilt angles is, the larger the antenna shape becomes.

The present invention has been made in view of the above circumstances, and it is possible to simultaneously change the vertical plane tilt angle and the beam width with a simple structure without increasing the size of the apparatus or complicating the control section. It is an object of the present invention to provide an antenna device capable of performing the above-mentioned operation and capable of supporting an antenna including a plurality of vertical antenna elements.

[0007]

The invention according to claim 1 is
A plurality of antennas each consisting of at least one or more antenna elements, and a power supply line that sequentially connects the plurality of antennas in series and transmits a signal input from the outside,
Connection control means for connecting or disconnecting the power supply line, and provided corresponding to each of the plurality of antennas,
And a power distribution unit that distributes the power of the high-frequency signal supplied through the power supply line to supply power to the corresponding antenna, and controls the connection control unit to change the number of antennas to which power is supplied at the same time. It is characterized by that.

According to a second aspect of the present invention, in the antenna device according to the first aspect, the connection control means is provided in each of the power feed lines between the plurality of antennas, and each of the connection control means outputs at least two different control signals. When any one of them is supplied, a connection is made, and the control signal is superimposed on the high frequency signal and supplied to the power supply line.

According to a third aspect of the present invention, in the antenna device according to the first or second aspect, the delay amounts in the feed lines between the plurality of antennas are different from each other.

According to a fourth aspect of the present invention, in the antenna device according to any one of the first to third aspects, among the feed lines between the plurality of antennas, the delay amount in the feed line between the antennas that feed at the same time is set. The feature is that it is made smaller as the distance between the antennas in the subsequent stage increases.

According to a fifth aspect of the present invention, in the antenna device according to any one of the first to fourth aspects, the power distribution means has an absorption resistance at a power distribution point.

The invention according to claim 6 is less
Multiple antennas each consisting of one or more antenna elements
And is provided corresponding to each of the antennas,
Directionality for distributing power and supplying power to each antenna
A coupler, the first input terminal of which is a high-frequency signal feed line
A second input terminal and a second output terminal connected to the
Non-reflective line that is almost non-reflective at each used frequency
Connected to the antenna and the first output terminal is connected to the antenna.
Directional couplers and a second output of each said directional coupler
The end of the non-reflective line connected to the terminal and the next stage
Each die connected between the first input terminals of the directional coupler
An ode switch, and the directional coupler of the next stage
A first input terminal and a first output terminal of the directional coupler;
Is connected directly or directly via a resistor, and
The first output terminal of the first directional coupler is galvanically grounded.
Connect to the board and add 1 value to the end of each diode switch.
Or supply DC voltage signals with different DC voltage values.
It is characterized and this <br/> for controlling an on / off of the respective diode switch Te.

According to a seventh aspect of the present invention, in the antenna device according to any one of the first to sixth aspects, the antenna is a microstrip antenna, the feed line,
It is characterized in that the connection control means and the power distribution means have a planar structure, and the antenna radiating portion and the feeding circuit have a planar pattern.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION <First Embodiment> An embodiment of the present invention will be described below with reference to the drawings. Figure 1
It is a schematic diagram showing composition of an antenna device by a 1st embodiment of the present invention.

In FIG. 1, 1-1, 1-2, ..., 1-
N are switch circuits 2-1, 2-2, ..., 2-, respectively.
These are antenna elements arranged in series that are excited by electric power supplied via N, and these antenna elements form an array antenna in the present antenna device.

Switch circuits 2-1, 2-2, ..., 2-N
Are switch circuits that are sequentially connected in cascade in the power supply line 3, and each distributes the power of the high-frequency signal supplied from the input / output terminal 4 via the power supply line 3 in the ON state,
While supplying a part of the same power to the antenna elements to which they are respectively connected, the power feeding line 3 of the previous stage is connected to the power feeding line 3 of the switch circuit side of the next stage, and the power other than the part is fed to the switch circuit side. Supply. These switch circuits 2-1 to 2
In the ON / OFF operation of -N, the operating voltage level for switching from the OFF state to the ON state is individually determined according to the voltage level output from the control circuit 5, and the ON / OFF operation is performed according to the level of the voltage signal supplied to the power feeding line 3. It is controlled (details of this control operation will be described later). It is to be noted that the switch circuits 2-1, 2-2, ..., 2-N in the OFF state do not supply power to the antenna element and disconnect the feeder line 3 without connecting it. Leave as it is.

The power supply line 3 is a line connecting between the antenna elements via the switch circuits, and transmits a signal input to the input / output terminal 4 or a signal output to the same terminal.

The input / output terminal 4 is a terminal connected to a predetermined signal generator, signal processor, or the like (not shown). The signal is input during transmission and the received signal is output during reception. Here, the signal input to the input / output terminal 4 at the time of transmission is a high-frequency signal radiated into the air by the antenna elements 1-1 to 1-N and is turned on / off by the switch circuits 2-1 to 2-N.
A voltage signal for controlling the FF operation (hereinafter, this voltage signal is referred to as a "switch control signal") is superposed. The supply form of this signal will be clarified by giving a specific example in the operation description below.

The control circuit 5 switches the switch circuits 2-1, 2-2, ..., 2-N according to the signal supplied from the control terminal 6.
To output the voltage signal for each of the above, and set the operating voltage level of each switch circuit according to the level of those voltage signals.

The control terminal 6 is a terminal to which a signal indicating the operating voltage level of each switch circuit is supplied. The instruction signals supplied to the control terminal 6 are switch circuits 2-1 to 2-1.
It is instructed to set the operation voltage level of 2-N to at least two kinds of different voltage values. For example, the operating voltage level of the switch circuit 2-1 is v, the switch circuit 2
Supply an instruction signal to set the operating voltage level of -2 to 2v,
As a result, the control circuit 5 outputs the voltage signal of the voltage value v to the switch circuit 2-1 and the voltage signal of the voltage value 2v to the switch circuit 2-2. In this way, one of at least two different voltage values is set as the operating voltage level of each switch circuit.

.., 7-N are phase shifters inserted and connected in the feed line 3, respectively, and switch circuits 2-2, 2-3, and 2nd and subsequent stages, respectively. ..., provided on the signal input side to 2-N. These phase shifters control the delay amount of the signal transmitted through the power supply line 3 between the switch circuits.

Next, the operation of the above configuration will be described. First, a signal is input to the input / output terminal 4. The signal to be input here is assumed to be a high frequency signal to be transmitted and a switch control signal for controlling each switch circuit superimposed thereon.

Then, the input signal is first input to the switch circuit 2-1. If the switch control signal superposed on the signal is equal to or higher than the operating voltage level of the switch circuit 2-1, the switch circuit 2-1 outputs the signal. Operate. As a result, the high-frequency signal is power-distributed and a part of the high-frequency signal is fed to the antenna element 1-1.
At the same time, the power supply line 3 on the switch circuit 2-2 side is connected and supplied to the next stage.

Next, a signal is input to the switch circuit 2-2, and the superimposed switch control signal is output to the switch circuit 2-.
If the operating voltage level is equal to or higher than 2, the switch circuit 2-2 operates in the same manner as described above, power distribution of the high frequency signal to the antenna element 1-2, connection with the power supply line 3 on the switch circuit 2-3 side, and power supply. Is done.

Thereafter, the switch circuits 2-3, 2-4, ...
Similarly, the operation of each switch circuit up to 2-N is controlled according to the switch control signal superimposed on the input signal. As a result, the high-frequency signal is radiated only from the antenna element connected to the switch circuit in which the switch control signal corresponds to a level equal to or higher than the operating voltage level.

In the present antenna device, the operating voltage level of each switch circuit is individually determined based on the voltage signal level output from the control circuit 5 as described above. Then, each switch circuit operates at an operating voltage level of at least one of at least two kinds of voltage values, and they are used in combination.

Therefore, for example, a DC voltage corresponding to a switch control signal is applied to the power supply line 3, and a high frequency signal is input from the input / output terminal 4 in that state. At this time, assuming that the operating voltage level of the switch circuit 2-1 is v and the operating voltage level of the switch circuit 2-2 is 2v as in the above-described example, the DC voltage v is applied to the power supply line 3 as a switch control signal. Switch circuit 2-1
Only the antenna element 1-1 connected to is operated. On the other hand, a DC voltage 2v is applied to the power supply line 3 as a switch control signal.
In the case of adding, the antenna element 1-2 connected to the switch circuit 2-2 also operates in addition to the antenna element 1-1 connected to the switch circuit 2-1.

As a result, a case where only one antenna element 1-1 is operated and two antenna elements 1-1 and 1-
The beam width of the vertical plane of the antenna can be changed depending on the case where 2 is operated. Also, one antenna element 1-1
As compared with the case where only one is operated, the switch circuits 2-1 and 2
-2, the vertical plane tilt angle when the two antenna elements 1-1 and 1-2 are operated can be changed by the delay amount in the power feed line 3 and the phase shifter 7-2.

Thus, in the present antenna device,
The number of antenna elements excited at the same time can be changed by the switch control signal supplied to the power feeding line 3, whereby the vertical plane beam width can be made variable.
Further, it becomes possible to change the excitation condition, and the vertical plane tilt angle can be made variable.

<Second Embodiment> Next, an antenna device according to a second embodiment of the present invention will be described. The antenna device according to the present embodiment is an antenna device in which the phase shift values of the phase shifters 7-2 to 7-N are different from each other in the antenna device of FIG. 1 described above.

The phase shift values of a plurality of phase shifters used in one array antenna composed of a plurality of simultaneously excited antenna elements are set to different values, and the delay amount in the feed line 3 connecting the respective antenna elements is calculated. Be different. As a result, it is possible to realize an antenna device that can change the number of simultaneously excited antenna elements as described above, and can also change the vertical plane beam width and scanning angle in one array antenna.

<Third Embodiment> Next, an antenna device according to a third embodiment of the present invention will be described. The antenna device according to the present embodiment is basically the same as the antenna device according to the first or second embodiment described above, except that the line length of the feed line connecting the antenna elements that are excited at the same time is 1 The length is set to an integral multiple of the wavelength, and the line lengths thereof are shortened as the distance between the antenna elements in the subsequent stages increases.

This corresponds to a configuration in which the delay amount between a plurality of simultaneously excited antenna elements is shortened toward the antenna elements in the subsequent stage. Therefore, this configuration
Specifically, it can be realized by controlling the delay amount between the antenna elements with a phase shifter provided in the feed line. That is, the antenna device of the present embodiment is configured by reducing the phase shift values set by the phase shifters 7-2, 7-3, ... In FIG.

During operation, the switch control signal is changed depending on the number of stages up to which the antenna elements are excited at the same time, and the switch control above the operating voltage level of each switch circuit to which the antenna elements to be simultaneously excited is connected. A signal is supplied to the power supply line 3, and then a high frequency signal is supplied in an overlapping manner.

According to this structure, when the number of simultaneously excited antenna elements is small, the vertical plane beam width is large and at the same time the vertical plane tilt angle is large. However, as the number of simultaneously excited antenna elements increases, the aperture area of the antenna increases, so the vertical plane beam width becomes narrower, and at the same time the vertical plane tilt angle becomes smaller. As a result, when the antenna device of the present embodiment is used for a base station antenna installed at a high place, a beam having a large vertical plane beam width and a large vertical plane tilt angle is used for a short distance, and a beam for a long distance is used. It is possible to realize different antennas that can be selectively used only by controlling the voltage of the switch control signal, such as using a beam with a small vertical plane beam width and a small vertical plane tilt angle.

<Fourth Embodiment> Next, an antenna device according to a fourth embodiment of the present invention will be described. Figure 2
It is a schematic diagram showing the composition of the antenna device. This antenna device uses a power divider with an absorption resistor in order to improve the designability of the switch circuit.
In the figure, the same components as those in FIG. 1 described above are designated by the same reference numerals and the description thereof will be omitted. or,
In each of the following embodiments, the first-stage switch circuit (corresponding to the switch circuit 2-1) will be omitted on the assumption that at least one antenna element is operated.

The difference between the present antenna device and each of the above antenna devices is the switching circuit 2-2.
2 to 2-N, switch circuits 2'-2 to 2'-N are provided, and power distributors 8-1 to 8-N are provided in front of the respective switch circuits. The other parts are the same as the configuration of FIG.

In FIG. 2, the switch circuit 2'-2,
2′-3, ..., 2′-N are switch circuits for controlling whether or not the signal supplied via the power distributor of the previous stage is supplied to the power distributor of the next stage, respectively. It has only the connection function with the next stage of the switch circuit in, and does not have the power distribution function. Regarding the ON / OFF operation of these switch circuits 2'-2 to 2'-N, the operating voltage level is individually determined by the voltage level output from the control circuit 5, and according to the switch control signal supplied to the power feeding line 3. Controlled.

Power distributors 8-1, 8-2, ..., 8-N
Is a non-reflective distributor with an absorption resistor such as a Wilkinson divider, which distributes the power of the high-frequency signal supplied via the feed line 3 and supplies a part of the power to the antenna elements to which they are connected. Then, power other than the part is supplied to the next stage.

In this configuration, when a signal obtained by superimposing a switch control signal on a high frequency signal is input to the input / output terminal 4,
Similarly to the above, the high frequency signal is radiated only from the antenna element connected to the switch circuit in which the switch control signal corresponds to the level equal to or higher than the operating voltage level.

Here, in the present antenna device, before the signal supply to the next stage is controlled by turning on / off the switch circuits 2'-i (i = 2, 3, ..., N), the power distribution of the previous stage is preliminarily performed. The power of the signal is distributed by the device 8-j (j = i-1). Therefore, although the power loss is large, the radiation characteristic of the antenna is that there is an advantage that it is possible to avoid radiating or receiving extra radio waves by narrowing the beam width.

In addition, in the present antenna device, when the switch circuit 2'-i is turned off, the power distributor 8 in the preceding stage is used.
A reflected wave is generated in the switch circuit 2'-i by the signal supplied from -j. Therefore, by using a non-reflective distributor with an absorption resistor such as the above-mentioned Wilkinson divider as the power distributor, all the reflected waves are thermally absorbed by the resistors and the influence of the reflected waves is eliminated.

As described above, in the antenna device of this embodiment, the designability of the switch circuit is improved by using the power divider with the absorption resistor, and the power divider is made non-reflective in advance. The number of antenna elements used is controlled by the changeover switch circuit after the electric power is distributed by the non-reflective distributor. By adopting this configuration, it becomes possible to easily design a power feeding circuit for the antenna.

<Fifth Embodiment> Next, an antenna device according to a fifth embodiment of the present invention will be described. Figure 3
It is a schematic diagram showing the composition of the antenna device. This antenna device can be configured only with a flat substrate and is suitable for mass production. In the figure, the same components as those in FIG. 1 described above are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 3, 9-2, 9-3, ..., 9-
N is a diode switch connected in series, and when each is in the ON state, the directional coupler 10-1,
The signal supplied via 10-2, ..., 10- (N-1) is transmitted to the next stage (however, the diode switch 9-
N, the directional coupler 10- (N-1) is not shown. Below, N
The illustration of the other components near the stage is similarly omitted. ).

Directional couplers 10-1, 10-2, ..., 1
Reference numeral 0- (N-1) is a coupler responsible for coupling with the subsequent stage, and distributes the power of the high-frequency signal supplied via the power feeding line 3 and supplies a part of the power to the antenna element. Power other than a part is supplied to the next stage. Each of these directional couplers has two input terminals and two output terminals, and their respective input / output terminals are connected as follows. That is, the first input terminal is connected to the power feeding line 3 to which a high frequency signal is transmitted and supplied, and the second input terminal is connected to a line or a terminator that is a substantially non-reflective line at the used frequency. Also, the first output terminal is connected to the antenna element, and the second output terminal is connected to a line or a terminator that is a substantially non-reflective line at the used frequency.

This is, for example, the directional coupler 1 in the first stage in the figure.
Regarding 0-1, the first input terminal H1i1 is connected to the feed line 3, the second input terminal H1i2 and the second output terminal H1o2 are connected to the open stub 11-1, and the first output terminal H1o1 is connected. Is connected to the antenna element 1-1, thereby forming the above connection form. Here, the open stub 11-1 forms a line that is substantially non-reflective at the used frequency, and 11-2, 11-3, ..., 11- (N- provided on the other stages.
In 1), the same open stub is used to form a non-reflective line at the connection between the second input terminal and the second output terminal of each directional coupler.

The above diode switches 9-2 to 9-
N has one end (forward input side) connected to the end of the non-reflective line formed on the second output terminal side among these, and has the other end (forward output side) at the next stage of directional coupling. It is connected to the first input terminal of the power supply device, and when it is in the ON state, the power distributed and output from the directional coupler in the front stage is input to the directional coupler in the rear stage.

12 is a diode switch 9-2 to 9-N
This is a control terminal for applying a control voltage for controlling ON / OFF of. In this antenna device, the operating voltage level of each switch circuit is set and the connection state of the power feeding line is not determined by the switch control signal as in the above-described antenna devices, but the control applied to the control terminal 12 is controlled. ON / O of diode switches 9-2 to 9-N depending on voltage
FF is used to directly control the connection state of the power supply line.

Reference numeral 13 is a choke coil for cutting off high frequencies, and the control terminal 12 is connected to diode switches 9-2 to 9-N.
Is to be connected in a direct current manner. 14-1, 14-2,
..., 14-N is also a choke coil for high frequency cutoff,
It blocks high-frequency signal transmission between each antenna element and the other stages. Here, the choke coil 14-1 is grounded, and the choke coils 14-2 to 14-N are connected to the feed line 3 of the next stage. Further, for the choke coils 14-3, 14-4, ..., 14-N of the third and subsequent stages, the level of the control voltage at which the diode switches 9-3, 9-4 ,. , 15-N having a predetermined resistance value are connected in series to form a low-pass filter between the antenna element and the feed line.

As a result, the respective antenna elements are connected to each other only in terms of alternating current by the signal transmission path through the directional coupler, the diode switch, the phase shifter and the power feeding line. In terms of direct current, one end of each diode switch is connected to the control terminal 12, and the voltage at the other end of these diode switches gradually increases. It is possible to control how many stages of antenna elements are connected depending on the magnitude of voltage.

In this configuration, when a high frequency signal is input to the input / output terminal 4 and a control voltage is applied to the control terminal 12, the diode switches up to the number of stages corresponding to the magnitude of the control voltage are turned on, and the diode switches are turned on. The high-frequency signal is radiated only from the antenna element connected to the diode switch and the phase shifter and the feeding line.

For example, one diode switch is ON
Assuming that the voltage level of the state is v and the voltage level applied to the control terminal 12 is 2v, the diode switch 9-2
And 9-9 is turned on. As a result, the antenna elements are connected up to the third stage, and the antenna elements 1-1 to 1
A high frequency signal is emitted from -3.

As described above, in the antenna device of this embodiment, power is supplied to the antenna element connected to the subsequent stage by the coupler, and the diode switches are connected in series as the line on the subsequent stage progresses. .
This structure can be realized only with a flat substrate and is suitable for mass production. Further, by using the directional coupler as the power distributor, it is possible to set arbitrary power distribution, and it is possible to easily realize the unequal power array antenna.

<Sixth Embodiment> Next, an antenna device according to a sixth embodiment of the present invention will be described. The present embodiment is a specific example in the case of configuring the antenna device of FIG. 3 described above.

The antenna elements 1-1 to 1-N are formed by microstrip antennas formed by printing metal on a dielectric substrate. A 90-degree hybrid circuit is used as the directional couplers 10-1 to 10- (N-1), and they are configured in a planar structure such as a branch line hybrid circuit, a rat race circuit, or an electromagnetic coupling type directional coupler. Form by what is possible.

In this way, the antenna radiating section and the feeding circuit are formed in a plane pattern. As a result, it is possible to realize an antenna device suitable for mass production, in which the circuit components to be used are configured only as a circuit having a planar structure, that is, a branch line hybrid, a microstrip line, a microstrip antenna, etc., and can be realized only by photolithography.

Although the embodiments of the present invention have been described above, the present invention is not limited to the antenna devices of the above-described embodiments. For example, in the above embodiment, the antennas at each stage are made up of a single antenna element, but they may be made up of array antennas made up of a plurality of antenna elements.

[0059]

As described above, according to the present invention, the power of the high frequency signal is distributed to the antennas by controlling the connection control means for connecting or disconnecting the feeding lines which sequentially connect the plurality of antennas in series. Since the signal is supplied to the power distribution means that supplies power and the number of antennas that supply power at the same time is changed, the vertical plane tilt angle and the beam width can be made variable at the same time.

According to the second aspect of the present invention, the connection control means is provided for each of the feed lines between the antennas.
Connection is made when each of them is supplied with at least one of two or more different control signals, and the control signal is superimposed on the high frequency signal and supplied to the power supply line. The control signal makes it possible to change the number of antennas excited at the same time.
This allows the vertical plane beam width to be variable,
Beam formation according to the communication partner can be realized by a simple control circuit.

According to the third aspect of the invention, since the delay amounts in the feed lines between the plurality of antennas are different from each other, it is possible to change the number of antennas to be simultaneously excited and the excitation condition at the same time. Becomes This makes it possible to change the vertical plane beam width and simultaneously change the vertical plane tilt angle. Therefore, the vertical plane tilt angle and the vertical plane beam width can be controlled according to the application.

Further, according to the invention as set forth in claim 4, among the feed lines between the plurality of antennas, the delay amount in the feed line between the antennas that feed at the same time is made smaller between the antennas in the subsequent stages. It is possible to obtain a vertical plane beam width and a vertical plane tilt angle suitable for the above. That is, a beam with a broad vertical tilt angle is formed for a terminal station close to the base station, while a sharp beam with a small vertical tilt angle is formed for a terminal station away from the base station. The antenna to be formed can be easily realized.

In addition, according to the fifth aspect of the invention, since the power distribution means has absorption resistance at the power distribution point, the reflected wave component generated at the discontinuity of the line or the like is absorbed by the absorption resistance. Can be absorbed by. This makes it possible to absorb a change in impedance due to the connection control means mounted between the lines, which facilitates the design of the power distribution unit including the connection control means and the power distribution means.

On the other hand, according to the invention of claim 6, the power distribution means is a directional coupler in which an input terminal and an output terminal are connected in a predetermined form, and the connection control means is one of those terminals. The vertical plane tilt angle is controlled by the DC voltage signal to be provided because it is provided in the portion to which the predetermined terminal is connected and is controlled by the DC voltage signal and the voltage at the terminal DC-connected to the power feeding line in the next stage. Also, the beam width can be changed. Since the power is distributed by the directional coupler, it is possible to deal with the disconnection of the power supply line by the connection control means without particularly switching the impedance converter.
As a result, it becomes possible to easily cope with a change in the number of antenna elements, and an appropriate antenna configuration can be designed according to the application.

According to the invention described in claim 7, the antenna is a microstrip antenna, and the feed line, the connection control means and the power distribution means are constructed in a plane structure, and the antenna radiating portion and the feed circuit are formed in a plane pattern. Since the above configuration is adopted, the present antenna device can be manufactured only by the printing technique. As a result, mass production becomes easy, and the cost at the time of production can be suppressed.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of an antenna device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of an antenna device according to a fourth embodiment of the present invention.

FIG. 3 is a schematic diagram showing a configuration of an antenna device according to a fifth embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a conventional antenna device.

[Explanation of symbols]

1-1 to 1-N Antenna element 2-1 to 2-N, 2'-2 to 2'-N switch circuit 3 feeder lines 4 input / output terminals 5 control circuit 6, 12 control terminals 7-2 to 7-N Phase shifter 8-1 to 8-N power distributor 9-2 to 9-4 Diode switch 10-1 to 10-3 Directional coupler 11-1 to 11-3 Open stub

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-196927 (JP, A) JP-A-4-150303 (JP, A) JP-A-58-151704 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) H01Q 3/30 H01Q 3/24

Claims (7)

(57) [Claims] 1. A plurality of antennas each consisting of at least one or more antenna elements, a power feeding line for sequentially connecting the plurality of antennas in series and transmitting a signal input from the outside, and a connection of the power feeding lines. Or a connection control means for disconnecting, and a power distribution means provided corresponding to each of the plurality of antennas, for distributing the power of the high-frequency signal supplied via the power supply line to supply power to the corresponding antennas. An antenna device, comprising: controlling the connection control means to change the number of antennas to be fed simultaneously. 2. The antenna device according to claim 1, wherein the connection control means is provided on each of power feed lines between the plurality of antennas, and each of them is supplied with at least one of two or more different control signals. An antenna device, characterized in that the control signal is superposed on a high-frequency signal and supplied to the power supply line. 3. The antenna device according to claim 1, wherein delay amounts in feed lines between the plurality of antennas are different from each other. 4. The antenna device according to claim 1, wherein among the feed lines between the plurality of antennas, the delay amount in the feed line between the antennas that feed at the same time is set between the antennas in the subsequent stages. An antenna device characterized by being made smaller as it gets closer. 5. The antenna device according to any one of claims 1 to 4, wherein the power distribution means has an absorption resistance at a power distribution point. 6. At least one or more antennas each
A plurality of antennas consisting of elements and the power of high frequency signals provided corresponding to each antenna
And directional coupling for distributing power to each of the antennas
And the first input terminal is a power line for high-frequency signals.
A second input terminal and a second output terminal
For non-reflective lines that are almost non-reflective at each used frequency
Connected, and the first output terminal was connected to the antenna
Directional couplers, and the directional couplers connected to the second output terminals of the directional couplers
The end of the non-reflective line and the first of the directional coupler of the next stage
With each diode switch connected between the input terminals
The first input terminal of the directional coupler in the next stage and the directional
The first output terminal of the coupler is connected to the first output terminal via a resistor in a direct current,
Or directly connected to the first directional coupler
Connect the output terminal of 1 to the ground plane in direct current, and connect it to the end of each diode switch by one value or different
The DC voltage signals of a plurality of DC voltage values are supplied to each die.
An antenna device characterized by controlling on / off of an ode switch . 7. The antenna device according to any one of claims 1 to 6, wherein the antenna is a microstrip antenna, and the feed line, connection control means, and power distribution means have a planar structure. An antenna device characterized in that the unit and the feeding circuit are configured in a plane pattern.