JPS63310202A - Circularly polarized wave generator - Google Patents

Abstract

PURPOSE:To obtain a circularly polarized wave generator which can execute a fine adjustment of a 90 deg. phase difference without necessitating a screw for fine adjustment, by combining variously and using those which consist of different materials and lengths, for a dielectric support for fixing quartz glass. CONSTITUTION:In a circularly polarized wave generator, a phase difference of a radio wave E1 being parallel to quartz glass 2 and a radio wave E2 being orthogonal to the quartz glass 2 can be brought to a fine adjustment to 90 deg.. When a dielectric support 3b has been used, a phase difference characteristic 3b is smaller than 90 deg. phase difference, and when a dielectric support 3a has been used, a phase difference characteristic 3a is a little larger than 90 deg. phase difference. As for one part among three parts of the supports of quartz 2, the dielectric support 3a is used, and as for the remaining two parts, the support 3b is used. As a result, the phase difference characteristic becomes nearer 90 deg. by combing one piece of phase difference characteristic 3a and tow pieces of 3b. In such a way, by combining variously and using the dielectric supports whose materials are different, a 90 deg. phase difference can be brought to a fine adjustment, and the electric characteristic is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circularly polarized wave generator loaded with quartz glass.

[Conventional technology]

FIGS. 7 and 8 are a side sectional view and a front view showing a conventional circularly polarized wave generator. In the figure, 1 is a circular waveguide, 2 is quartz glass loaded in the circular waveguide 1, and 3 is quartz glass 2.
4 is a metal fitting for fixing the dielectric support 3, and 5 is a fine adjustment screw for adjusting the phase amount.

As shown in Figure 8, this type of circularly polarized wave generator generates circularly polarized waves by making the phase difference between the radio wave E1 parallel to the quartz glass 2 and the radio wave E2 perpendicular to the silica glass 2 to 90''. It functions as a vessel.

In order to bring about this phase difference, the radio waves E1 parallel to the quartz glass 2 are made to cross at right angles by the dielectric constant ε1 of the quartz glass 2 and the dielectric constant ε2 of the dielectric support 3 for fixing the quartz glass 2. Delay the phase to nearly 90" (nearly 90") than the electric i2J E2, then finely adjust it with the many fine adjustment screws 5 to 9
The phase difference should be 0°.

[Problem that the invention seeks to solve]

Since the conventional circularly polarized wave generator is configured as described above, a large number of fine adjustment screws 5 are required to adjust the phase difference of 90'', and since there are many fine adjustment screws 5, the adjustment time is shortened. There was also a problem that it required a long time.

This invention was made to solve the above-mentioned problems, and an object thereof is to obtain a circularly polarized wave generator that can finely adjust a 90° phase difference without requiring a fine adjustment screw.

[Means for solving problems]

The circularly polarized wave generator according to the present invention uses various combinations of dielectric supports of different materials or lengths for fixing quartz glass.

[Effect]

In this invention, since various combinations of dielectric supports of different materials or lengths are used, the relative permittivity ε of the dielectric supports can be changed, thereby reducing the 90° phase difference. Can be fine-tuned.

〔Example〕

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

1 and 2 are side sectional views and front views showing a circularly polarized wave generator according to a first embodiment of the present invention, and FIG. 3 is an m2 body support for supporting quartz glass used in this embodiment. FIG. In these figures, 1 is a circular waveguide, 2 is quartz glass, 3.3a, 3b, and 3c are dielectric supports made of different materials π, and λ is a metal fitting for fixing the dielectric support. In this embodiment, a dielectric support 3.3a for fine adjustment made of different materials as shown in FIG.
, 3b, and 3c are selected and used in combination.

In a circularly polarized wave generator having such a configuration, as shown in Fig. 2, the phase difference between the radio wave E1 parallel to the quartz glass 2 and the radio wave E2 perpendicular to the quartz glass 2 is set to 90'', which is different from the conventional example. It is similar, and it is also the same that the radio wave E1 is delayed in phase by nearly 90 degrees from the radio wave E2, but since a combination of dielectric supports 3a and 3b of different materials is used as the dielectric support, it is different from the conventional method. It is possible to finely adjust the 90° phase difference without using a fine adjustment screw as in the example.

This means that, for example, the phase difference characteristic when using the dielectric support 3b shown in FIG. 3 is the phase difference characteristic 3 shown in FIG. 4G.
When the retardation characteristic using dielectric support t-3a is smaller than 90° as shown in b, and the retardation characteristic using dielectric support t-3a is slightly larger than <90" as shown in retardation characteristic 3a, one of the three supports of quartz glass 2 shown in FIG. By using dielectric supports 3a at one location and dielectric supports 3b at the remaining two locations, one phase difference characteristic 3a is obtained as shown in FIG.

It is clear that the angle becomes closer to 90° when there are two pieces of 3b.

As described above, in this embodiment, by using various combinations of dielectric supports made of different materials, the 90° phase difference can be finely adjusted and the electrical characteristics can be improved.

FIG. 6 is a side sectional view showing a circularly polarized wave generator according to a second embodiment of the present invention, and FIG. 5 shows a dielectric support used in the device of this embodiment. In both figures, 3, 31, 32
．． Dielectric supports 33 are made of the same material but have different lengths. In the device of this embodiment, the dielectric supports 3 and 32 are used in combination.

Even in a circularly polarized wave generator having such a configuration, the relative permittivity ε of the dielectric support can be changed, and 9
The 0° phase difference can be finely adjusted.

〔Effect of the invention〕

As described above, according to the circularly polarized wave generator of the present invention, dielectric supports of different materials or lengths are used in various combinations, so fine adjustment screws are not required, and the 90°
Fine adjustment of the phase difference can be easily performed, and the device can be made inexpensive.

[Brief explanation of the drawing]

1 and 2 are side sectional views and front views showing a circularly polarized wave generator according to a first embodiment of the present invention, and FIG. 3 shows various dielectric supports made of different materials used in the embodiment. 4 is a diagram showing phase difference characteristics, FIG. 6 is a side sectional view showing a circularly polarized wave generator according to a second embodiment of the present invention, and FIG. 5 is a diagram showing the length used in this embodiment. FIGS. 7 and 8 are side sectional and front views of a conventional circularly polarized wave generator, respectively, showing different types of dielectric supports. In the figure, 1 is a circular waveguide, 2 is a quartz glass 3.3a
, 3b, 3c, 31.32.33 are dielectric supports, 4
is a metal fitting. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) In a circularly polarized wave generator in which quartz glass is loaded in a circular waveguide with a plurality of dielectric supports, the plurality of dielectric supports are made of various materials or lengths, and the circularly polarized wave A circularly polarized wave generator characterized by being capable of generating.