JPH0629722A - Polarized wave switching structure - Google Patents

Abstract

PURPOSE:To accurately rotate a primary radiation horn at 90 deg. with the axis of radiation as a center in a short time. CONSTITUTION:A primary radiation horn 1 is held between a horn clamp 2 and a horn support 3. A horn support rotating base 4 holds the horn support 3 rotatably with the axis of radiation as a center. A pin 8 provided on the side of the horn support side 3 is moved along a groove 7 on the side of the horn support rotating base 4 in accordance with rotation of the primary radiation horn 1 and is set to the position where the rotation angle is accurately 90 deg..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarization switching structure, and more particularly to a horn antenna polarization switching structure for switching two linearly polarized signals orthogonal to each other.

[0002]

2. Description of the Related Art A conventional polarization switching structure, as shown in FIG. 3, has a structure in which a cylindrical primary radiation horn 1 is sandwiched and fixed by a horn clamp 11 and a horn support 12. By rotating the horn 1 by 90 °, polarization switching between two orthogonal linear polarizations and polarization plane adjustment are performed.

When switching polarization, the horn clamp 1
The primary radiation horn 1 is rotated 90 ° by relying on the scale 13 attached to the 1 and the horn support 12 and the mark 14 attached to the primary radiation horn.

[0004]

In the above-mentioned conventional polarization switching structure, since the primary radiation horn is rotated while switching the polarization while watching the scale, it is difficult to rotate it at an accurate angle. After that, further fine adjustment is required,
There is a problem that it takes time to adjust the polarization switching.

An object of the present invention is to provide a polarization switching structure capable of rotating the primary radiation horn 90 ° accurately and in a short time without fine adjustment when switching the polarization.

[0006]

A polarization switching structure of the present invention is a polarization switching structure in which a primary radiation horn rotates 90 ° about a radiation axis, and the primary radiation horn is rotatable about the radiation axis. A horn holding means that is held and fixed, a rotary base on which the horn holding means is rotatably held around a radial axis, a pin provided on a surface of the horn holding means in a direction orthogonal to the radial axis, and the rotary base. And a groove that is provided on the base and engages with the pin to set a rotation range.

[0007]

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

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG.

A cylindrical primary radiation horn 1 is sandwiched between a horn clamp 2 and a horn support 3 and fixed by screws 5.
By loosening the screw 5, the primary radiation horn 1 rotates about the radiation axis, and fine adjustment becomes possible.

A pin 8 is provided on the horn support 3. A horn support turntable 4 that holds the horn support 3 rotatably is provided with a groove 7 that guides a pin 8 when the horn support 3 rotates with the primary radiation horn 1 about a radiation axis.

Here, the groove 7 is set so that the horn support 3 can be accurately rotated by 90 °, and by loosening the screw 6 that is screwed with the pin 8, the primary radiation horn 1 can be accurately and quickly moved to 90 °. Can be rotated.

[0012]

As described above, according to the present invention, the primary radiation horn is held by the horn clamp and the horn support, and the horn support is mounted on the rotary table which is rotatably held about the radiation axis. By providing the pin on the horn support side and the groove for engaging with the pin and setting the rotation angle to 90 ° on the rotary base side, the polarization can be switched accurately and in a short time.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 taken along the line AA.

FIG. 3 is a perspective view showing an example of a conventional polarization switching structure.

[Explanation of symbols]

 1 Primary radiation horn 2 Horn clamp 3 Horn support 4 Horn support turntable 5,6 Screw 7 Groove 8 pin

Claims (1)

[Claims] 1. The primary radiation horn is 90 ° about the radiation axis.
In a rotating polarization switching structure, the primary radiation horn is a horn holding means that is rotatably held and fixed about a radiation axis, and a turntable on which the horn holding means is rotatably held about the radiation axis. A polarization switching structure comprising: a pin provided on a surface of the horn holding means in a direction orthogonal to a radiation axis; and a groove provided on the rotary table and engaging with the pin to set a rotation range.