JPH0263202A - Antenna equipment - Google Patents

Abstract

PURPOSE:To use two or more frequencies simultaneously by providing many radiation elements on one reflecting mirror surface and utilizing it also as a radiation face. CONSTITUTION:A radio wave of a transmission signal from a transmitter 61 whose frequency is fHT is sent to a radiation feeding part 4a and fed to many radiator elements 3 fitted to a reflecting mirror 1. Then the phases of lots of the radiation elements 3 are synthesized to radiate a radio wave to a satellite in front of the antenna system. Moreover, a reception signal of a frequency fHR from the satellite is fed to lots of the radiation elements 3 fitted to the reflection mirror 1 in a reverse path, the phases are synthesized and led to the radiation feeding part 4a and sent to a receiver 7a. The reflecting mirror surface has a reflecting face and a radiation face and separate radiation feeding parts 4a, 4b are added respectively and the reflecting mirror surface is used by using two frequencies or more at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an antenna device used for satellite communication.

[Conventional technology]

FIG. 5 is a configuration diagram showing a conventional antenna device, in which 1 is a reflecting mirror 1. 2 is a reflecting mirror 2.4 is the reflecting mirror 1 and the reflecting mirror 2.
It is a radiant feeding unit that shares two or more frequencies located at the optical center of the 5 is a support column that supports the reflecting mirror 2. 6a is a transmitter with frequency rMy, 6b is frequency rt,
t transmitting device, 7a a receiving device of frequency fall, 7b
is a receiving device of frequency fLl.

Next, the operation will be explained.

The radio wave of the transmission signal from the transmitting device 6a having the frequency fHT is radiated through the radiation feed section 4, reflected by the reflecting mirror 2, further reflected by the reflecting mirror 1, and radiated to the satellite. Similarly to the above, the radio wave of the transmission signal from the transmitting device 6b having the frequency f4 is radiated through the radiation feeder 4, reflected by the reflecting mirror 2, further reflected by the reflecting mirror 1, and radiated to the satellite.

Next, the radio wave of the received signal of the frequency ROM incident from the satellite is reflected by the reflecting mirror 1, further reflected by the reflecting mirror 2, guided to the radiation feeding section 4, and then guided to the receiving device 7a. Further, the radio wave of the received signal having the frequency fLR is reflected by the reflecting mirror 1 in the same manner as described above, further reflected by the reflecting mirror 2, and guided to the radiation feeding section 4, and then guided to the receiving device 7b.

As described above, the radiation feeding section 4 is configured so that radio waves of transmission signals and reception signals of two or more frequencies pass therethrough.

[Problem to be solved by the invention]

Since the conventional antenna device is configured as described above, it is necessary to pass two or more frequencies through the radiation feeding section 4, and in the circular waveguide that is the center of the radiation feeding section 4,
Unnecessary high-order mode radio waves are generated at higher frequencies, and in order to suppress the generation of unnecessary high-order mode radio waves, the structure becomes complicated because a filter for suppressing the high-order mode is inserted. In addition, there were other problems such as a narrower frequency range that could be used.

This invention was made to solve the above-mentioned problems, and by configuring radiation feeding sections each having a different frequency, it eliminates the generation of unnecessary higher-order mode radio waves, and The purpose of this invention is to obtain an antenna device that can use two or more frequencies simultaneously.

[Means to solve the problem]

In the antenna device according to the present invention, one of the at least one reflecting mirror surface is provided with a large number of radiating elements having a frequency different from that used as a reflecting surface, so that this also serves as a radiating surface. By adding separate radiation feeding parts to the reflecting surface and the emitting surface, the reflecting mirror surface can be used as a reflecting surface and a emitting surface at two or more frequencies.

[Effect]

In the antenna device of this invention, one reflective mirror surface has a reflective surface and a radiation surface, and a separate radiation feeding section is added to each surface, so it can be used at the same time using two or more frequencies. .

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In Fig. 1, ■ is a reflector 1.2 is a reflector 2.3 is a large number of radiating elements attached to the reflector 1, 4b is a frequency radiation feeder that uses the reflector 1 as a reflecting surface, and 4a is a This is a frequency radiation feeding section that uses the reflecting mirror 1 as a radiation surface. 5a and 6b are the respective radiant feeders 4a and 4
a transmitting device that sends a transmission signal to 7a and 7b;
are receiving devices that process received signals from satellites separated by the radiation feeding units 4a and 4b, respectively.

Next, the operation will be explained.

The frequency of the radio wave of the transmission signal from the transmitting device 6a is
The power is transmitted to the radiation power feeding section 4a, and is fed to a large number of radiation elements 3 attached to the reflecting mirror 1. Here, by combining the phases of a large number of radiating elements 3, it is possible to radiate to the satellite in front of the antenna device. In addition, the received signal of frequency f□ from the satellite is fed by a large number of radiating elements 3 attached to the reflector 1 in the opposite path to the above, the phases are synthesized, and the signal is guided to the radiating feeding section 4a. Furthermore, the receiving device 7a
transmitted to.

Next, the radio waves of the transmission signal from the transmitting device 6b having the frequency fL-a are transmitted to the radiation feeding part 4b made exclusively for the purpose, are radiated, are reflected by the reflecting mirror 2, and are further transmitted to the radiation feeding section 4b, which is made exclusively for the purpose, and are reflected by the reflecting mirror 2. The light is reflected by the reflector 1 and radiated to the satellite without being affected by the element 3. In addition, the received signal of frequency fLII from the satellite is reflected by the reflector 1 and further reflected by the reflector 2 without being affected by the radiating element 3 attached to the reflector 1, in the opposite path to the above. , radiation feed section 4
b and is transmitted to the receiving device 7b.

Here, the frequency fLl at which the reflector 1 is used as a reflector is
and the frequencies fNT and f when the reflection Fi1 is used as a radiation plate by a large number of radiation elements 3 attached to the reflection mirror 1.
The relationship of il is rHt and f. This can be achieved by setting >fLT and fLjl.

In the above embodiment, a large number of radiating elements 3 are provided on one surface of the reflecting mirror.
However, a large number of radiating elements may be provided on two surfaces of the reflecting mirror.

Moreover, the configurations shown in FIGS. 3 and 4 can be considered as examples of more detailed configurations of the large number of radiating elements in the above embodiment.

That is, FIG. 3 shows an example in which a waveguide slot element is used as a radiation element constituting a radiation surface, and as shown in FIG. 3, a number of waveguides 8 are arranged in parallel on the reflection tR1 surface, A hole 10 for radiating radio waves is provided in the wall of the waveguide 8, and a waveguide 11 is provided on the opposite surface of the hole 10 for radiating radio waves, which combines the radio waves of the multiple waveguides 8 via a coupling hole 9. Therefore, the effects of the above embodiments can be obtained.

Furthermore, FIG. 4 shows an example in which a microstrip element is used as a radiating element constituting a radiating surface. As shown in FIG. A radiation hole 10' is provided on the surface of the metal plate 12, and a coupling line 14 and a composite circuit 15 are provided on the back surface of the radiation hole 10' via a dielectric plate 13. Therefore, the effects of the above embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, a single reflective mirror surface is provided with a large number of radiating elements so that it can also be configured as a radiation surface, so that the reflective mirror surface can be used as both a reflective surface and a radiation surface.
Since it can be used at more than one frequency, and its reflecting surface and emitting surface can each be configured with a radiant feeding section having a different frequency, each radiating feeding section can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an antenna device according to one embodiment of the present invention, FIG. 2 is a schematic diagram of another embodiment of the present invention, and FIG.
FIG. 4 is a schematic diagram showing an example of a radiating element of the present invention, and FIG. 5 is a schematic diagram showing a conventional antenna device. 1 is reflection @1. 2 is a reflector 2. 3 is a radiating element, 4 is a radiation feeder, 5 is a reflector support column, 6 is a transmitter, 7 is a receiver, 8 is a waveguide, 9 is a coupling hole , lO,10” is a radiation hole,
11 is a waveguide for synthesis, 12 is a metal plate, 13 is a dielectric plate,
14 is a coupling line, and 15 is a composite circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) In an antenna device having at least one reflective mirror surface, one of the reflective mirror surfaces is provided with a radiating element having a frequency different from the frequency used as the reflective surface, and the reflective mirror surface is used as a reflective surface and a radiation surface. An antenna device characterized in that it is used at two or more frequencies.