JP2590864B2 - Feeding structure of microstrip antenna - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave band antenna, and more particularly to a feed structure for a thin microstrip antenna.

[Conventional technology]

Conventionally, as a feeding structure of a microstrip antenna used in a microwave band, for example, a structure for feeding power from the side as shown in FIG. 3 has been proposed. In this feed structure, a dielectric substrate 1 having an antenna radiating element 7 and a dielectric substrate 2 having a microstrip line 3 are integrated with a ground conductor 4 interposed therebetween. 6 is connected to the microstrip line 3 and the ground conductor 4 to supply power.

Although not shown, a structure in which power is supplied from the back in addition to the lateral power supply structure has been proposed.

[Problems to be solved by the invention]

In the above-described conventional lateral feeding structure, although a low voltage standing wave ratio can be obtained, it has an adverse effect on antenna radiation characteristics.
Further, in the conventional back feed structure, the antenna radiation characteristics are good, but the voltage standing wave ratio is extremely large. For this reason,
It is difficult to satisfy both the voltage standing wave ratio and the antenna radiation characteristics in any of the feeding structures, and there is a problem that an excellent feeding structure cannot be obtained.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a feed structure of a microstrip antenna capable of satisfying both a voltage standing wave ratio and antenna radiation characteristics.

[Means for solving the problem]

The feed structure of the microstrip antenna according to the present invention includes:
A cut was made in a part of a dielectric substrate having a microstrip line and a ground conductor, and this was raised at a substantially right angle so as to draw an arc, and the raised tip was attached to a metal jig and the metal jig. The connector is electrically connected to the connector, so that both features of the lateral power supply structure and the rear power supply structure are effectively exhibited.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a view showing one embodiment of the present invention, and is a perspective view before a connector is arranged, and FIG. 2 is a side view showing a state where a connector is attached.

In the figure, a dielectric substrate 1 in an antenna radiating portion and a dielectric substrate 2 in an antenna feed circuit portion have a structure in which a ground conductor 4 is bonded back to back. A microstrip line 3 for feeding power from a connector is formed on the dielectric substrate 2 in the antenna feed circuit portion. A part of the dielectric substrate 2 is cut along the microstrip line 3 and the ground conductor 4 from the front end thereof, and is raised upward in an arc. A metal jig 5 is erected on the dielectric substrate 2 in the vicinity of the raised jig, and the ground conductor 4 of the raised dielectric substrate 2 is attached so as to be in close contact with one surface of the metal jig 5. ing. A connector 6 is mounted on the upper surface of the metallic jig 5, and a center conductor of the connector 6 is soldered to the microstrip line 3. The outer conductor of the connector 6 is connected to the metal jig 5 with a screw 8.

Therefore, according to this structure, the horizontal feed structure and the rear feed structure are combined, and both the low voltage standing wave ratio of the horizontal feed structure and the good antenna radiation characteristics of the rear feed structure can be utilized. Thus, it is possible to obtain a feeding effect of a low voltage standing wave ratio and good antenna radiation characteristics.

〔The invention's effect〕

As described above, the present invention cuts a part of a dielectric substrate having a microstrip line and a ground conductor, and raises the cut at a substantially right angle so as to draw an arc,
Since the raised tip is electrically connected to the metal jig and the connector attached to it, both characteristics of the lateral power supply structure and the back power supply structure can be effectively exhibited, and the low voltage constant There is an effect that power can be supplied without deteriorating the radiation characteristics of the antenna while maintaining the wave ratio.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of the present invention, and is a perspective view showing a state before a connector is attached, FIG. 2 is a side sectional view showing a state where a connector is attached, and FIG. 3 is a side sectional view showing an example of a conventional structure. FIG. DESCRIPTION OF SYMBOLS 1 ... Dielectric board of an antenna radiation part, 2 ... Dielectric board of an antenna feed circuit part, 3 ... Microstrip line, 4 ... ground conductor, 5 ... Metal jig, 6 ... Connector, 7 ... antenna radiating element, 8 ... screws.

Claims (1)

(57) [Claims] An incision is made in a part of a dielectric substrate having a microstrip line and a ground conductor, and the cut is raised at a substantially right angle so as to draw an arc, and the raised ground conductor is made of metal. A feed structure for a microstrip antenna, wherein a jig and a microstrip line are electrically connected to a connector attached to the metal jig.