JPH02134003A - Output method for plane antenna - Google Patents

Abstract

PURPOSE:To eliminate the need for a polarized angle adjusting metallic fixture and install a plane antenna in parallel with a ground surface by devising the plane antenna such that a reception wave of two polarized wave components as horizontal and vertical polarized wave components is outputted without rotating the plane antenna in matching with a polarized angle. CONSTITUTION:Input apertures 8a, 8b of a 2-wave combiner 8 for horizontal and vertical polarized waves are coupled with a waveguide aperture 7a of a waveguide part 5 corresponding to a horizontal polarized wave output part A and a vertical polarized wave output part B being components of the entire output part of the plane antenna Y. Then a received wave in two modes being horizontal and vertical polarized wave modes is extracted by the 2-wave combiner 8 through one waveguide. Thus, it is not required to rotate the plane antenna Y in matching with the polarized wave angle. Then it is not required to provide a polarized angle adjusting metallic fixture for the plane antenna Y and the plane antenna is installed in parallel with a ground surface to attain excellent external appearance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is an output method for a flat antenna for receiving satellite broadcasting.

[Conventional technology] The satellite used in the satellite broadcasting system is 3600K above the equator.
There is a worldwide agreement to transmit broadcast radio waves from broadcasting satellites in geostationary orbit above m.

Broadcasting satellites generally use circularly polarized radio waves, but in countries overseas such as the United States and Europe, communication satellites use linearly polarized radio waves.

Furthermore, in order to effectively utilize radio waves, in the case of linearly polarized waves, radio waves of both horizontal and vertical polarization with the same frequency or slightly shifted frequencies are often used.

When radio waves from such communication satellites are received on the ground using a parabolic antenna, the primary horn of the first radiator can be rotated to correspond to the polarization angle, and horizontally and vertically polarized radio waves can be received. It is possible to receive

[Problems to be Solved by the Invention] However, in the case of a planar antenna, as shown in Fig. 10(a), the planar antenna Y is arranged as shown in Fig. 10(b) to match the polarization angle of the linearly polarized wave from the communication satellite X. It needs to be rotated as shown. Therefore, when constructing the antenna, it is necessary to adjust the polarization angle in addition to the elevation angle and horizontal angle, and the planar antenna Y itself requires a polarization angle adjustment fitting.
Furthermore, since the planar antenna Y is rotated, there is a problem in that the external shape is very unsightly.

The present invention has been made in view of the above points, and its purpose is to easily switch between two (layer liquid components) such as horizontal and vertical polarization, and to An object of the present invention is to provide an output method for a planar antenna that can control two polarization angles without rotating the entire antenna.

Means for Solving the Problems [Claims] The invention described in Claims provides a planar antenna that simultaneously receives radio waves having two polarization components, and two waveguide sections that separate and output received waves of each polarization component. 3, wherein the received waves of the modes of the two polarized wave components separated and outputted from these waveguide sections are combined by a two-wave combiner to output the received waves of the two polarized wave components. The described invention is the invention described in claim 1, in which the two polarized components are horizontally polarized and vertically polarized, and the entire planar antenna is connected to the two-wave combiner by an amount corresponding to the angle without shifting according to the polarized angle. The angle of the probe of the waveguide on the converter side to be coupled is set to extract horizontal (radio waves or vertically polarized) received waves.

In the invention as claimed in claim 2, a planar antenna that simultaneously receives radio waves having two iη wave components is provided with one waveguide section from which the received waves of the sap component can be taken out. The invention according to claim 11 outputs received waves of two polarized wave components from the part, and the invention according to claim 11 is the invention according to claim 2, wherein both wave components are a horizontally polarized wave and a vertical fq wave, and In the waveguide on the converter side that is coupled to the wave tube section, a 10-b angle is set to correspond to the angle at which the entire planar antenna is shifted to match the polarization angle, and horizontally polarized or vertically polarized received waves are detected. It is something to be extracted.

According to the method of the present invention, two polarized wave components, in particular, according to the third and fourth aspects of the invention, horizontally polarized wave, without rotating the planar antenna in accordance with the polarization angle. 2 of vertical polarization
It is possible to output two (ti wave component) received waves,
There is no need for polarization angle adjustment fittings, and the planar antenna can be installed parallel to the ground surface.

[Example] The present invention will be explained below with reference to Examples.

FIG. 1 shows an example of a so-called dual type antenna that can simultaneously receive horizontally polarized and vertically polarized radio waves using a planar antenna Y used in the method of the present invention. The planar antenna Y shown in FIG. An antenna output is generated in the direction, and the antenna dimensions all at this time are set to -i in a dimension close to λ972, that is, the effective wavelength/2, so that resonance reception can be performed. Similarly, when a radio wave with the same vertical component is received, an antenna output is generated in the ■ direction of the patch antenna 1, and the antenna dimension is also λg/2 # a
The dimensions are set close to v, so that resonance reception is possible.

As a method of outputting the received signal of the received radio waves, a feeder line 2 formed with a microstrip line is used from the center end of each received polarized wave. ．． 2v to combine the received signals of the plurality of patch antennas 1.

The output section of the entire planar antenna Y in FIG. 1 consists of a horizontal polarization output section A and a vertical polarization output section B. Here, the planar antenna Y used in the method of the present invention uses waveguide output, and the second
As shown in Figures (a) and (b), a waveguide section 5 (corresponding to horizontal polarization output section A in the figure) is attached to horizontal polarization output section A and vertical polarization output section B in Figure 1, respectively. A probe 611 (or 6V) connected to the feeder line 2□ (or 2.) is placed inside the waveguide 7, and the received wave is taken out from the waveguide opening 7a. It looks like this.

Here, in the waveguide opening 7a of the waveguide section 5 corresponding to the horizontally polarized wave output part A and the vertically polarized wave output part B, a two-wave combiner 8 of horizontally polarized wave and vertically polarized wave shown in FIG. The input apertures 8a and 8b of the two are combined. As this two-wave synthesizer 8, YOKOWOMF
YOI4-14041404 manufactured by C, CO, LTD.
Δ type, YO for simple horizontal polarization and vertical polarization
Models such as M-1403 and 1405 can be used.

This two-wave combiner 8 makes it possible to extract received waves in two modes, horizontally polarized and vertically polarized, using one waveguide.

A polarization angle switch 9 shown in FIG. 4 is coupled to the output aperture 8C of the two-wave synthesizer 8. This polarization angle switch 9
passes through the input waveguide section 9a, the output waveguide section 9b vertically arranged along the end of the manual waveguide section 9a, and the output waveguide section 9b. A probe 11 whose tip is disposed within the input waveguide section 9a, and this probe 11
A pulse motor 10 rotates the motor based on an external control signal.
The probe 1 corresponds to the polarization plane of the received wave.
By controlling the rotation of the waveguide 1, horizontally polarized or vertically polarized received waves are converted and outputted to the output waveguide section 12.

As the polarization angle switch 9, a switch commercially available from PICO Corporation for use with parabolic antennas under the product number PRA12 can be used.

FIG. 5 shows a receiving system using a two-wave combiner 8 and a polarization angle switch 9. In this system, two components of horizontal polarization and vertical polarization received by a planar antenna Y are received. The waves are outputted from the corresponding waveguide sections 5, and the outputted received waves are combined by a two-wave combiner 8, and then a predetermined polarized wave component is switched and outputted by a polarization angle switcher 9, and a converter 12 The received signal is converted into a predetermined frequency by the converter 12, and is further received by the tuner 13 and reproduced by the television receiver 14.

Here, a method of making one converter 12 correspond to received waves of horizontal polarization and vertical polarization will be explained.

First, when the planar antenna Y separates and outputs two waves of horizontally polarized wave and vertically polarized wave components using the waveguide section 5, the probes 6□ and 6v of each waveguide section 5 are set at right angles as shown in FIG. will be placed in In this case, the horizontal polarization and vertical polarization components at the probe 6 are a = V cos θ + H sin θ, and the horizontal polarization and vertical polarization components at the probe 6 v are b = V sin θ + H sin θ, and these components a and b are divided into two waves. When synthesized by the synthesizer 8, vector synthesis is performed.

Then, on the polarization angle switch 9 side, by shifting the angle θ and controlling the angle of the probe 11 to horizontal polarization A or vertical polarization, horizontally polarized or vertically polarized received waves can be extracted. It is.

The planar antenna Y used in the above explanation was provided with waveguide sections 5 corresponding to two polarized components, respectively.
As shown in Figure (a), in the case where the outputs of horizontally polarized waves and vertically polarized waves may be taken out from one waveguide section 5, the waveguide section 5 is a guide having a circular or square cross section. A feeder line 2 formed from a wave tube and extending from each patch antenna 1. ．． 2v independently, and if necessary, cross them as shown in FIG. 7(a) or FIG. Probe 6, . 6V is outputted to the waveguide section 5, modes of each polarized wave component are created in the vertical and horizontal directions, and a received wave is output.

In the case of this embodiment, it is sufficient to connect the polarization angle switch 9 to the waveguide opening of the waveguide section 5 as shown in FIG.
Cost and weight can be reduced by eliminating the need for a wave combiner.

Further, when adjusting the polarization angle on the converter 12 side, the probe 11 of the polarization angle switcher 9
The angle may be controlled by the pulse motor 10 and switched.

[Effects of the Invention] As described above, the method of the present invention allows receiving waves of two polarization components, such as horizontal (both horizontal waves and vertical polarization), without rotating the planar antenna according to the polarization angle. Therefore, there is no need to provide a polarization angle adjustment fitting on the planar antenna, and the planar antenna can be constructed parallel to the ground surface, resulting in an improved external appearance.

[Brief explanation of drawings]

Fig. 1 is a partially omitted and broken perspective view of a planar antenna used in the method of the present invention, and Fig. 2 (a) and (b) show a waveguide section of the planar antenna used in an embodiment of the method of the present invention. A perspective view of the main part, an enlarged cross-sectional view of the waveguide section, and Figure 3 are the same as above.
A perspective view of the wave synthesizer, Fig. 4 is a sectional view showing the mechanical configuration of the polarization angle switcher used in the above, Fig. 5 is a configuration diagram of the receiving system used in the above, and Fig. 6 is a polarization angle shown in the same as the above. 7(a> and 7(b) are perspective views of essential parts of the waveguide section of a planar antenna used in another embodiment of the present invention, and a schematic configuration diagram of the waveguide section, and FIG. 8 is a diagram for explaining the switching. An enlarged sectional view of the main parts of the same as above, FIG. 9 is a configuration diagram of the receiving system used in the above, and FIGS. 10(a) and (b)
) is an explanatory diagram of polarization angle adjustment in a conventional example. Y is a planar antenna, 5 is a waveguide section, 8 is a two-wave combiner, 9
1 is a polarization angle switch, 11 is a probe, and 12 is a converter. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 (G) (b) 8 is a two-wave combiner Figure 3 Figure 5 Figure 12 is a converter Figure 7 (b) Figure 6 Figure 8 Figure 9 Figure 10 Figure (b), -ff1 Izumi Tane City 1E Kai ↑ (from 1″J) Display of the case Showa () 3rd patent application No. 288162 Name of the invention Planar antenna output method 3, supplementary person case and Relationship Patent Applicant Address 1048 Kadoma, Kadoma City, Osaka Name (58
3) Matsushita Electric Works Co., Ltd.

Claims (4)

[Claims] (1) Separate and output received waves of each polarization component to a planar antenna that simultaneously receives radio waves with two polarization components.
two waveguide sections are provided, and received waves of two polarized wave component modes separated and outputted from these waveguide sections are combined by a two-wave combiner to output received waves of two polarized wave components. An output method of a planar antenna characterized by: (2) A planar antenna that simultaneously receives radio waves with two polarization components is provided with one waveguide section from which the received waves of each polarization component can be taken out. A planar antenna output method characterized by outputting received waves of wave components. (3) The two polarized components are horizontally polarized and vertically polarized. 2. The planar antenna output method according to claim 1, wherein the horizontally polarized or vertically polarized received wave is extracted by setting the angle of the probe. (4) The two polarization components are horizontal polarization and vertical polarization, and the angle corresponds to the angle at which the entire planar antenna is shifted in accordance with the polarization angle in the waveguide on the converter side that is coupled to the waveguide section. 4. The planar antenna output method according to claim 3, wherein the horizontally polarized wave or the vertically polarized received wave is extracted by setting the angle of the probe.