JPS6331302A - Power supply device for phase difference of antenna - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a phase difference feeding device for an antenna, which is suitable for an antenna having a plurality of feeding points.

[Summary of the invention]

The present invention simplifies the configuration and reduces the size by distributing high-frequency signals to multiple amplifiers with a predetermined phase difference and feeding the outputs of the multiple amplifiers to multiple feeding points of the antenna. At the same time, transmission loss is reduced.

[Conventional technology]

Conventionally, ■FW, uupi? When high output is required in a transmitter such as F, for example, as shown in Figure 4, 1
A pair of final stage power amplifiers αυ, (6) are provided.

The excitation power supplied from the input terminal (1) is transferred to amplifiers α and ( 6) and each output of the amplifier αη and (6) tit the second hybrid ring α→
The signals are synthesized and output to the output terminal (2).

The output of the terminal (2) of the human transmitter in Figure 4 is transmitted from the input terminal (3) of Figure B to the phase shifter (
4) A phase difference of 590' is given to the microstrip antenna (5), which is provided at an angular interval of 90'.
It is distributed to a pair of feed points (5a) and (5b). As a result, circularly polarized waves are radiated from the microstrip antenna (5). Note that this power feeding format is known from, for example, US Pat. No. 3,921,177.

If higher output is required, for example, as shown in Figure 5, in addition to the pair of amplifiers αη and (B) as described above, a pair of amplifiers 2℃ and (B) are added. . Similar to amplifiers αη and (b), third and fourth hybrid rings (c) are provided on the input side and output side of the added amplifiers (c) and (b) to distribute input and output. The synthesis of Furthermore, a fifth hybrid ring (A) is inserted between the first and third hybrid rings (2) and (A) and the input terminal (1),
A sixth hybrid ring (E) is placed between the second and fourth hybrid rings o4 and (C) and the output terminal (2).
is inserted to perform input distribution and output synthesis for the first amplification system (1) including the amplifier (2) and the second amplification system (1) including the amplifier (C) and the wire. will be carried out.

The output of the terminal (2) of the human transmitter in Figure 5 is
Power is supplied from the input terminal (3) of the microstrip antenna (5) via the phase shifter (4).

In addition, in the case of four-point feeding as shown in Japanese Patent Application Laid-open No. 58-59605, a pair of feeding points (5a) and (5b) of the microstrip antenna (5) are shown in FIG.
) and the phase shifter (4), and a second phase shifter (6) is inserted between the other pair of feed points (5C) and (5d) and the phase shifter (4). A third phase shifter (7) is inserted in between.

In order to sequentially phase shift the high frequency signals supplied to each feed point (5a) to (5d) by 90 degrees, a feed line between the first and second phase shifters (4) and (6) is provided. For (8),
The feed line between the first and third phase shifters (4) and (7) (
9) is configured so that it becomes longer by 1/4 wavelength. As a result, circularly polarized waves are radiated with more uniform radiation characteristics in the horizontal plane.

[Problem that the invention seeks to solve]

However, the phase shifter (4) on the antenna side as described above.

(6) and (Since both are hybrid rings, the antenna combined with such a phase shifter has a fourth
As shown in Figures 1 and 5, when connecting a transmitter that combines the outputs of multiple amplifiers, the high-frequency IT power that has been combined inside the transmitter is divided again by the phase shifter on the antenna side. However, there were problems in that the configuration became unnecessarily complicated and the shape became large.

Additionally, since multiple hybrid rings are connected in cascade, there is a problem of large transmission loss.

In view of the above, an object of the present invention is to provide a phase difference feeding device for an antenna that has a simplified configuration, a smaller size, and reduced transmission loss.

[Means for solving problems]

The present invention includes a plurality of amplifiers and a phase difference distribution means that distributes a high frequency signal by imparting a predetermined phase difference to each of the plurality of amplifiers, and distributes each output of the plurality of amplifiers to a plurality of feeding points of an antenna. This is a phase difference feeding device for antennas that feeds power to both antennas.

[Effect]

According to the present invention, the configuration is simplified, the shape is reduced, and transmission loss is reduced.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a phase difference feeding device for an antenna according to the present invention will be described below with reference to FIG.

FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, parts corresponding to those in FIG. 4 are given the same reference numerals, and some explanations will be omitted.

In Fig. 1, for example, the excitation power of IIW is input to the input terminal (
1), and are delayed in phase by 90° and 180° by the hybrid ring (to), respectively, and then supplied to the final stage power amplifiers α and (6). Amplifiers 0υ and υ each use a single transistor, e.g. 1.6G)i
z Unfortunately, it is possible to obtain an output of 25W in class C operation. The outputs of the amplifiers αυ and (2) are given a phase difference of 90°, just like their inputs, and are connected to a pair of feed points (5a) of the microstrip antenna (5).
) and (5b) directly. As a result, circularly polarized waves are radiated from the antenna (5).

According to this embodiment, the power combiner 6 tatami on the transmitter side and the phase shifter (4) on the antenna side shown in FIG. , transmission loss is reduced.

Furthermore, when offset feeding the microstrip antenna (5), both amplifiers αυ and (2) are connected to the antenna (5).
) can be placed on the back side of the - layer, making it possible to downsize the - layer.

The conventional phase shifter (4) on the antenna side is connected to the antenna (5) and -
Since it is formed on a microstrip on the body, it is difficult to arrange it on the back side of the antenna from the point of view of impedance matching.

Next, with reference to FIG. 2, another embodiment of the antenna phase difference feeding device according to the present invention will be described.

The structure of another embodiment of the present invention is shown in FIG. In FIG. 2, parts corresponding to FIGS. 4 and 5 are given the same reference numerals, and some explanations will be omitted.

In the embodiment shown in FIG. 2, the output of the first amplification system QO including the amplifiers α and α is supplied from the combiner C14 to one feed point (5a) of the microstrip antenna (5a). Then, the output of the second amplification system (e) including amplifiers P21) and 4 is supplied from the combiner to the other feed point (5b) of the antenna (5). As shown in the figure, since there is a phase difference of 90a between the outputs of both amplification systems q0 and Kan, circularly polarized waves are radiated from the microstrip antenna (5).

Similarly to the embodiment shown in FIG. 1, the embodiment shown in FIG. 2 also has the effects of simplifying the structure, reducing the size, and reducing transmission loss.

Next, with reference to FIG. 3, still another embodiment of the antenna phase difference feeding device according to the present invention will be described.

The configuration of yet another embodiment of the present invention is shown in FIG.

In FIG. 3, parts corresponding to those in FIGS. 4 and 5 are given the same reference numerals, and some explanations will be omitted.

In the embodiment of FIG. 3, the first and third distributors (6
) and (4), the feed line (c) between the second and third distributors and (c) is configured to be longer by 1/4 wavelength, As shown, the amplifier (
1st return, (6), 9. A phase difference of 90° is given between each input signal in (e). Also, each amplifier α■.

a, 21) and 2) and each feeding point of the antenna (5) (
5m), (5b).

Four feeder lines (29m), (29b), (29c) and (29m) connecting (5C) and (5d), respectively.
9d) are all made equal in length, and each feed point (5a) to (5d) of the antenna (5) is equipped with an amplifier α to (e).
Each output having a phase difference of 90° is supplied, and circularly polarized waves are radiated with uniform radiation characteristics in the horizontal plane.

The embodiment shown in FIG. 3 also has the same effects as the embodiments shown in FIG. m1 and FIG.

Although each of the above-mentioned embodiments describes the case where power is fed to a microstrip antenna, the present invention is not limited to these embodiments, and can be applied to various antennas that require phase difference power feeding. [Effects of the Invention] As detailed above, according to the present invention, a high frequency inverse signal is distributed to a plurality of amplifiers with a predetermined phase difference, and the outputs of the plurality of amplifiers are distributed to a plurality of antennas. Since the antenna is configured to feed power to each of the feeding points, it is possible to obtain a phase difference feeding device for an antenna that has a simplified configuration, a smaller size, and reduced transmission loss.

[Brief explanation of drawings]

FIG. 1 is a wiring diagram showing the configuration of one embodiment of the antenna phase difference feeding device according to the invention, FIG. 2 is a wiring diagram showing the configuration of another embodiment of the invention, and FIG. FIG. 7 is a wiring diagram showing a configuration of another embodiment, and a wiring diagram showing a fourth configuration example. (5) is the antenna, αυ, υ, an, a is the amplifier, and 4. □□□, ) is phase difference distribution means (hybrid ring)
It is.

Claims (1)

[Scope of Claims] Comprising a plurality of amplifiers, and a phase difference distribution means for distributing a high frequency signal by imparting a predetermined phase difference to each of the plurality of amplifiers, the output of each of the plurality of amplifiers is distributed to a plurality of antennas. A phase difference power feeding device for an antenna, characterized in that power is fed to each feeding point of the antenna.