JP3439382B2 - Portable mobile radio telephone apparatus and portable mobile radio antenna failure detection method - 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 failure detection technique for a portable mobile radiotelephone device, and in particular, a failure diagnosis of an internal antenna can be easily performed at any time without using a measuring instrument for diagnosing a failure of the internal antenna. The present invention relates to a portable mobile radiotelephone device and a portable mobile radio antenna failure detection method that are executed to speed up troubleshooting.

[0002]

2. Description of the Related Art FIG. 5 is a rear view of a mobile unit. Referring to FIG. 5, since the whip antenna 7 is located outside the mobile unit and there are many expandable types, it is relatively easy to find an abnormality in the antenna. On the other hand, the built-in antenna 6 is completely hidden inside the mobile unit. Therefore, the abnormality of the antenna cannot be detected.
FIG. 6 is a perspective view of the built-in antenna 6. Referring to FIG. 6, the built-in antenna 6 is often attached to the housing on the back of the mobile device with a double-sided tape or the like, and as shown in FIG. Since there are many cases where they are contacted with each other, there is a problem that they are peeled off from the double-sided tape due to an impact such as dropping, the contact with the substrate is weakened, or they are separated. Even if such a problem occurs, if the whip antenna 7 is normal and the power level is large to some extent,
Since the mobile device can send and receive normally at first glance, there is a problem that it does not notice a failure. However,
In such a case, since diversity reception cannot be performed and reception sensitivity is deteriorated, there is a problem in that normal operation cannot be performed when moving at high speed or used in a place where power is weak.

[0003]

The prior art requires a measuring instrument such as a signal generator, a power meter or a network analyzer when measuring the coupling amount of the antenna in order to investigate the failure of the built-in antenna as described above. There was a problem. The present invention has been made in view of such problems, and an object thereof is to easily perform failure diagnosis of an internal antenna at any time without using a measuring instrument for diagnosing failure of the internal antenna. Another object of the present invention is to provide a portable mobile radiotelephone device and a portable mobile radio antenna failure detection method for speeding up failure handling.

[0004]

According to a first aspect of the present invention, it is possible to easily execute a failure diagnosis of an internal antenna at any time without using a measuring instrument for diagnosing a failure of the internal antenna and to deal with the failure. A portable mobile radiotelephone device for speeding up, wherein a transmission circuit in an internal radio circuit is
Modulator for modulating power output from IF local oscillator
And the power output from the modulator from the RF local oscillator
Frequency that converts to RF frequency based on the output power
The converter and the amplification of the power output from the frequency converter
The power amplifier to perform and the power output from the power amplifier
Equipped with a high power type power amplifier for amplification,
Connected to the microphone, at a certain level or
Outputs the transmission power of the wave number and receives it in the internal wireless circuit
The circuit is a low noise power amplifier that amplifies the received power.
And the power output from the low noise power amplifier and the RF station
From the power output from the local oscillator to the first IF frequency
A first frequency converter for performing conversion, and from the first frequency converter
The power output and the power output from the receiving IF local oscillator
Second frequency converter for converting force to second IF frequency
And amplifying the power output from the second frequency converter.
It has an IF power amplifier and is connected to the built-in antenna.
Received the transmission power in the closed state, and further the second local oscillation
And a switch between the second local oscillator and the RF local oscillator.
Switching to perform switching and input to the first frequency converter
Switch and the power output from the IF power amplifier
Is output from the IF power amplifier.
Control unit to which the RSSI voltage is input.
Receive the transmission power while connected to the built-in antenna.
Operation to receive with the signal circuit and connect to the whip antenna
Transmission of a certain level or a certain frequency in a fixed state
The operation to output the power from the transmission circuit is performed at the same timing.
At this time, the receiving circuit can measure the received power level.
And the built-in antenna with the whip antenna
The present invention resides in a portable mobile radiotelephone device characterized by detecting the coupling amount of Further, the gist of the invention according to claim 2 is that the changeover switch 1 is a substitute for the first frequency converter.
The portable mobile radiotelephone device according to claim 1 , wherein the input to the frequency converter is performed instead.
In addition, the gist of the invention according to claim 3 is that a portable mobile device that easily executes a failure diagnosis of the built-in antenna at any time without using a measuring instrument that diagnoses a failure of the built-in antenna to speed up the response to the failure. a radio antenna failure detection method, transmission inside the radio circuit process, transmit IF local
A modulation step of modulating the power output from the oscillator;
The power output from the modulation process is output from the RF local oscillator.
Frequency conversion that converts to RF frequency based on the applied power
Conversion step and amplification of power output from the frequency conversion step
And a power amplification step for performing
It is equipped with a high power type power amplification process that amplifies power
A certain level or
Outputs a constant frequency of transmission power and sends it to the internal radio circuit.
The receiving process is a low-noise type power amplifier that amplifies the received power.
Output from the power amplification step and the low noise power amplification step
The first IF from the power and the power output from the RF local oscillator
A first frequency conversion step for converting to a frequency, and the first frequency conversion step.
The power output from the wavenumber converter and the receiving IF local oscillator
From the power output from the second IF frequency
Output from the two frequency conversion step and the second frequency conversion step.
The IF power amplification step for amplifying the power
Receives transmission power when connected to the storage antenna,
In addition, the changeover switch provided inside the second station
Switching between the local oscillator and the RF local oscillator,
The step of inputting to the first frequency converter and the IF power increase
The process of inputting the power output from the width process to the demodulator
And an RSSI voltage output from the IF power amplification step
Is input to the control unit, and
Receives transmission power with the receiving circuit connected to the antenna
And the state of being connected to the whip antenna
The transmission power of a certain level or frequency is transmitted.
The operation to output from the road is performed at the same timing.
The receiving circuit measures the received power level,
The amount of coupling between the whip antenna and the built-in antenna
There is a portable mobile radio antenna failure detection method characterized by detecting. Further, the gist of the invention according to claim 4 is that the changeover switch is the first frequency converter.
The portable mobile radio antenna failure detection method according to claim 3 , wherein the input to the frequency converter is performed instead .

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The feature of each embodiment described below is to provide a measurement for diagnosing a failure of a built-in antenna by providing a means for self-diagnosis of a plurality of antennas for transmitting and receiving radio waves. The failure diagnosis of the built-in antenna can be easily performed at any time without using a device or the like, and as a result, the failure can be promptly dealt with. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First Embodiment) FIG. 1 is a functional block diagram for explaining a portable mobile radiotelephone device according to a first embodiment of the present invention.
In FIG. 1, 1 is a modulator (MOD), 2 is a frequency converter, 3 is a power amplifier, 4 is a high power type power amplifier, 5 is an antenna switch, 6 is a built-in antenna, 7 is a whip antenna, and 8 is low noise. Type power amplifier, 9 is a first frequency converter, 10 is a second frequency converter, 11 is an IF power amplifier,
12 is a reception IF local oscillator, 13 is an RF local oscillator, 1
4 is a transmission IF local oscillator, 15 is a changeover switch, 1
Reference numeral 6 indicates a second local oscillator, and 17 indicates an RSSI (received field strength signal) voltage. Referring to FIG. 1, a portable mobile radiotelephone device according to the present embodiment has a modulator 1 (MO).
D), frequency converter 2, power amplifier 3, high power type power amplifier 4, antenna switch 5 for switching between whip antenna 7 and built-in antenna 6, built-in antenna 6 installed inside the device for receiving power, device A whip antenna 7, which is mounted outside the device for transmitting and receiving power, a low noise type power amplifier 8, a first frequency converter 9, and a second frequency converter 1.
0, IF power amplifier 11, reception IF local oscillator 12, R
An F local oscillator 13, a transmission IF local oscillator 14, a changeover switch 15, and a second local oscillator 16 are provided.

The transmitter circuit in the radio circuit inside the portable mobile radio telephone device includes a modulator 1 (MOD) for modulating the power output from the transmission IF local oscillator 14 and a modulator 1.
The frequency converter 2 that converts the power output from the (MOD) into the RF frequency based on the power output from the RF local oscillator 13, and the power amplifier 3 that amplifies the power output from the frequency converter 2. And a high power type power amplifier 4 that amplifies the power output from the power amplifier 3, and outputs a constant level or constant frequency of transmission power connected to the whip antenna 7.

The receiving circuit in the radio circuit inside the portable mobile radio telephone device is a low noise type power amplifier 8 for amplifying the received power, a power output from the low noise type power amplifier 8 and an RF local oscillator 13. First from the output power
A first frequency converter 9 for converting to an IF frequency;
A second frequency converter 10 for converting the power output from the frequency converter 9 and the power output from the reception IF local oscillator 12 into a second IF frequency, and a second frequency converter 10.
The IF power amplifier 11 that amplifies the power output from the device is provided and receives the transmission power in the state of being connected to the built-in antenna 6. Further, the operation of receiving the transmission power in the receiving circuit in the state of being connected to the built-in antenna 6 and the operation of outputting the transmission power of the constant level or the constant frequency in the state of being connected to the whip antenna 7 from the transmitting circuit are at the same timing. Will be done at. At this time, the amount of coupling between the whip antenna 7 and the built-in antenna 6 can be known by the reception circuit measuring the reception power level. In this way, by measuring the coupling amount of the two antennas (the built-in antenna 6 and the whip antenna 7) and determining whether or not the coupling amount is normal,
It becomes possible to perform self-diagnosis of the antenna. Further, the receiving circuit performs diversity reception by receiving with two antennas (the built-in antenna 6 and the whip antenna 7).

Further, in the present embodiment, a second local oscillator 16 which is another local oscillator and a changeover switch 15 are newly provided at positions within broken lines in FIG. The change-over switch 15 switches between the RF local oscillator 13 and the second local oscillator 16 and inputs them to the first frequency converter 9. The power output from the IF power amplifier 11 is input to a demodulation unit (not shown). IF power amplifier 11
The RSSI voltage 17 output from the controller is a control unit (not shown).
Is input to the RSSI voltage 17 in this embodiment.
The received power level can be determined based on

Next, the operation of the portable mobile radio telephone device (portable mobile radio antenna failure detection method) will be described.
FIG. 2 is a timing chart for explaining the operation of the portable mobile radio telephone device. As shown in FIG. 2, the transmitter circuit and the receiver circuit operate at different timings during normal operation, and the transmitter circuit and the receiver circuit operate at the same timing during self-diagnosis according to the present invention. First, at the time of self-diagnosis, the antenna switch 5 shown in FIG. 1 connects the transmission circuit to the whip antenna 7 and the reception circuit to the built-in antenna 6.
In addition, the changeover switch 15 includes a second local oscillator 16
Connect to the side. Next, the transmission circuit transmits electric power of a certain level or a certain frequency from the whip antenna 7.
At this time, since the receiving circuit operates at the same timing as the transmitting circuit, the power output from the whip antenna 7 is received by the built-in antenna 6 and input to the receiving circuit. At this time, by setting the frequency of the power output from the second local oscillator 16 to an appropriate frequency, the first frequency converter 9 converts and outputs the same first IF frequency as in the normal operation. After that, the reception power level is measured based on the RSSI voltage 17 in the same manner as the normal operation of the reception circuit. The difference between the received power level measured at this time and the power level transmitted by the transmission circuit is the amount of coupling between the whip antenna 7 and the built-in antenna 6. This whip antenna 7
It is possible to detect the failure of the built-in antenna 6 by determining whether or not the amount of connection between the built-in antenna 6 and the built-in antenna 6 is an appropriate amount.

FIG. 3 is a functional block diagram of a conventional portable mobile radiotelephone device. In FIG. 3, 1P is a modulator (MOD), 2P is a frequency converter, 3P is a power amplifier,
4P is a high power type power amplifier, 5P is an antenna switch,
6P is a built-in antenna, 7P is a whip antenna, 8P is a low noise power amplifier, 9P is a first frequency converter, 10P
Is a second frequency converter, 11P is an IF power amplifier, 12P
Is a reception IF local oscillator, 13P is an RF local oscillator, 14
P indicates a transmission IF local oscillator, and 17P indicates an RSSI voltage. Referring to FIG. 3, the portable mobile radiotelephone device according to the present embodiment includes a modulator 1P (MOD), a frequency converter 2P, a power amplifier 3P, a high power type power amplifier 4P, a whip antenna 7P and a built-in antenna 6P. An antenna switch 5P for switching, a built-in antenna 6P mounted inside the device for receiving electric power, a whip antenna 7P mounted outside the device for transmitting and receiving electric power, a low noise type power amplifier 8P, a first frequency converter 9P. , The second frequency converter 1
0P, IF power amplifier 11P, reception IF local oscillator 12
P, RF local oscillator 13P, transmission IF local oscillator 14P
Is equipped with.

The transmission circuit in the radio circuit inside the portable mobile radio telephone device outputs from the modulator 1P (MOD) for modulating the power output from the transmission IF local oscillator 14P and the modulator 1P (MOD). A frequency converter 2P that converts the power and the power output from the RF local oscillator 13P into an RF frequency, a power amplifier 3P that amplifies the power output from the frequency converter 2P, and a power amplifier 3P.
High power type power amplifier 4 for amplifying the power output from the
It has P.

The receiving circuit in the radio circuit inside the portable mobile radio telephone apparatus is a low noise type power amplifier 8P for amplifying the received power, a power output from the low noise type power amplifier 8P and an RF local oscillator 13P. First frequency converter 9P for converting the output power to the first IF frequency
And the power output from the first frequency converter 9P and the reception I
A second frequency converter 10P that converts the power output from the F local oscillator 12P to a second IF frequency, and an IF that amplifies the power output from the second frequency converter 10P.
The power amplifier 11P is provided. The receiving circuit performs diversity reception by receiving with two antennas (the built-in antenna 6P and the whip antenna 7P).

In the portable mobile radio telephone device having such a configuration, the transmission frequency and the reception frequency are usually different, so that the electric power transmitted by the portable mobile radio telephone device cannot be received by the portable mobile radio telephone device. It is impossible. in this case,
When the receiving circuit receives the power output from the transmitting circuit,
Since the first IF frequency output by the first frequency converter 9P is different from the first IF frequency during normal use, it is impossible to measure the received power level.

As described above, according to the first embodiment, the built-in antenna 6 can be easily used at any time without using a measuring instrument or the like for diagnosing the failure of the built-in antenna 6.
The failure diagnosis can be performed, and as a result, the failure can be promptly dealt with.

(Second Embodiment) Next, a second embodiment will be described with reference to the drawings. Figure 4
[Fig. 6] is a functional block diagram for explaining a portable mobile radio telephone device according to a second embodiment of the present invention. The same parts as those already described in the first embodiment are designated by the same reference numerals, and the duplicated description will be omitted. In the present embodiment, the second local oscillator 16 and the changeover switch 15 of the first embodiment are arranged within the broken line in FIG. 4, and the input to the frequency converter 2 is changed over by the changeover switch 1.
It is characterized in that the same operation as that of the first embodiment is realized by adopting the configuration of switching by 5.

As described above, according to the second embodiment, the built-in antenna 6 can be easily used at any time without using a measuring instrument or the like for diagnosing the failure of the built-in antenna 6.
The failure diagnosis can be performed, and as a result, the failure can be promptly dealt with. In addition, by optimizing the frequency of the power output from the second local oscillator 16, the output of the frequency converter 2 can be made equal to the reception frequency.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it is apparent that the respective embodiments can be modified appropriately within the scope of the technical idea of the present invention. Further, the number, positions, shapes, etc. of the above-mentioned constituent members are not limited to those in the above-mentioned embodiment, and the number, positions, shapes, etc. suitable for carrying out the present invention can be adopted. Moreover, in each figure, the same components are denoted by the same reference numerals.

[0019]

Since the present invention is configured as described above, the failure diagnosis of the built-in antenna can be easily performed at any time without using a measuring instrument or the like for diagnosing the failure of the built-in antenna. As a result, it is possible to promptly deal with the failure.

[Brief description of drawings]

FIG. 1 is a functional block diagram for explaining a portable mobile radiotelephone device according to a first embodiment of the present invention.

FIG. 2 is a timing chart for explaining the operation of the portable mobile radiotelephone device.

FIG. 3 is a functional block diagram of a conventional mobile radiotelephone device.

FIG. 4 is a functional block diagram for explaining a portable mobile radio telephone device according to a second embodiment of the present invention.

FIG. 5 is a rear view of the mobile device.

FIG. 6 is a perspective view of a built-in antenna.

[Explanation of symbols]

1 ... Modulator (MOD) 2 ... Frequency converter 3 ... Power amplifier 4 ... High power type power amplifier 5 ... Antenna switch 6 ... Built-in antenna 7 ... Whip antenna 8 ... Low noise power amplifier 9 ... 1st frequency converter 10 ... Second frequency converter 11 ... IF power amplifier 12 ... Reception IF local oscillator 13 ... RF local oscillator 14 ... Transmission IF local oscillator 15 ... Changeover switch 16 ... Second local oscillator 17 ... RSSI voltage

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Claims (4)

(57) [Claims] 1. A portable mobile radiotelephone to achieve rapid reduction of failure countermeasure always running failure diagnosis easily built-in antenna without using a measuring instrument that performs a diagnosis of the built-in antenna failure, the internal The transmission circuit in the wireless circuit of the transmission IF local oscillation
Modulator for modulating the power output from the modulator, and the modulator
Power output from the RF local oscillator.
A frequency converter for converting to RF frequency based on force,
Power amplification that amplifies the power output from the frequency converter
And a high power amplifier that amplifies the power output from the power amplifier.
Equipped with power type power amplifier and connected to whip antenna
The transmission power of a certain level or frequency.
Output, and the receiving circuit in the internal radio circuit increases the received power.
LOW-NOISE POWER AMPLIFIER AND LOW-NOISE POWER AMPLIFIER
From the RF local oscillator and the power output from the RF local oscillator.
First frequency converter for converting force to first IF frequency
And the power output from the first frequency converter and the reception IF
From the power output from the local oscillator to the second IF frequency
A second frequency converter for performing conversion, and the second frequency converter
Equipped with an IF power amplifier that amplifies the power output from the
Receives transmission power when connected to the built-in antenna
And further switching between the second local oscillator and the second local oscillator and the RF local oscillator.
And a switching switch for inputting to the first frequency converter.
Switch and the power output from the IF power amplifier is input.
And the RSSI voltage output from the IF power amplifier is input
Is made and a control section which, receiving times the transmission power in a state of being connected to the internal antenna
The operation of receiving on the road and connected to the whip antenna
Transmission power at a certain level or frequency
At the same timing to output from the transmission circuit,
In this case, that the receiving circuitry measures the received power level
Connection between the whip antenna and the built-in antenna
A portable mobile radiotelephone device characterized by detecting the total amount . 2. The changeover switch 1 is provided with the first frequency.
The portable mobile radiotelephone device according to claim 1 , wherein an input is made to the frequency converter instead of the converter . 3. A portable mobile radio antenna failure detection method for promptly responding to a failure by easily executing failure diagnosis of the built-in antenna at any time without using a measuring instrument for diagnosing failure of the built-in antenna. , The transmission process in the internal radio circuit, the transmission IF local oscillation
A modulation step for modulating the power output from the converter, and the modulation step
The power output from the process is output from the RF local oscillator.
Frequency conversion technology that converts to RF frequency based on the electric power
And the power output from the frequency conversion process is amplified.
Power amplification step and power output from the power amplification step
It is equipped with a high power type power amplification process for
Connected to the antenna, at a certain level or
It outputs the transmission power of constant frequency, and the receiving process in the internal radio circuit increases the received power.
Low noise type power amplification step for performing width and the low noise type power amplification
The power output from the process and the RF local oscillator output
Frequency conversion that converts the power from the
Conversion step, and receiving the power output from the first frequency converter.
The second IF frequency from the power output from the signal IF local oscillator
A second frequency conversion step for converting into a number, and the second frequency
IF power amplification that amplifies the power output from the conversion process
It has a process and it is connected to the built-in antenna
Receiving the signal power, and the changeover switch provided inside the second switch
Switching between the local oscillator and the RF local oscillator,
The power input from the first frequency converter and the power output from the IF power amplification step are input to the demodulation unit.
Input process and the RSSI voltage output from the IF power amplification process are controlled.
And a step of inputting the transmission power to the internal antenna while receiving the transmission power.
The operation of receiving on the road and connected to the whip antenna
Constant level or constant frequency transmit power is state
At the same timing to output from the transmission circuit,
At this time, the receiving circuit has to measure the received power level.
Connection between the whip antenna and the built-in antenna
A portable mobile radio antenna failure detection method characterized by detecting a total amount . 4. The changeover switch is configured to operate at the first frequency.
The portable mobile radio antenna failure detection method according to claim 3 , wherein an input to the frequency converter is performed instead of the number converter .