JPH04247703A - Parabolic antenna - Google Patents

Abstract

PURPOSE:To enhance the incident and emissive efficiency of radio wave by sticking the sub-reflecting mirror to one end of the dielectric substance, integrating into one body and unnecessiating the supporting rod of the feeder by inserting this dielectric substance into the feeder and supporting the feeder. CONSTITUTION:The incoming radio wave is reflected in a main reflecting mirror 11 and a sub-reflecting mirror 12 and is transmitted to a feeder 14 via a dielectric substance 13. The sub-reflecting mirror 12 is sticked to one end of the dielectric substance 13 and the other end is inserted into the feeder 14. Thus, the unnecessiating of the supporting rod becomes possible.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parabolic antenna, and more particularly to a parabolic antenna for microwave radio equipment.

0002

2. Description of the Related Art A conventional parabolic antenna, as shown in FIG.
A sub-reflector 22 that is provided near the focal point of 1 and further reflects the collected radio waves, and a support rod 23 that supports the sub-reflector 22.
and a power feeder 24 that receives the radio waves reflected by the sub-reflector 22.
It has

0003

SUMMARY OF THE INVENTION Conventional parabolic antennas have the disadvantage that a portion of the radio waves are blocked by the support rods because the sub-reflector is supported by the support rods.

0004

[Means for Solving the Problems] A parabolic antenna of the present invention includes a main reflecting mirror, a sub-reflecting mirror provided near the focal point of the main reflecting mirror, and a power feeder provided on the main reflecting mirror. In the parabolic antenna, the sub-reflector is fixed to one end, and the other end includes a dielectric body that is engaged with and supported by the feeder.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. As shown in FIG. 1, a main reflector 11 that reflects incoming radio waves
, a sub-reflector 12 that further reflects the radio waves collected by the main reflector 11, and a power feeder 4 that is integrated with the sub-reflector 12.
It has a dielectric 13 inserted into the power supply 13 and a power supply 14.

[0006] After the incoming radio waves are reflected in the order of main reflector 11 and sub-reflector 12, they pass through dielectric material 1 which has low loss for microwaves.
3 to the power feeder 14. The sub-reflector 12 is
It is fixed to one end of the dielectric 13, and the dielectric 13 is
The other end is inserted into and supported by the power supply 14. By doing so, the conventionally used support rod can be removed.

[0007] Although the above explanation is for the case of receiving radio waves, the same effect can be obtained even when transmitting radio waves, just by reversing the route of the radio waves.

[0008]

As explained above, the present invention provides support for the sub-reflector by fixing and integrating the sub-reflector to one end of the dielectric, and inserting and supporting the dielectric into the power feeder. Since the support rod used in the past can be removed, the radio waves will not be blocked by the support rod.

[Brief explanation of the drawing]

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

FIG. 2 is a sectional view showing a conventional parabolic antenna.

[Explanation of symbols]

11, 21 Main reflecting mirror 12, 22 Sub-reflector 13 Dielectric 14, 24 Power feeder

Claims (1)

[Claims] 1. A parabolic antenna having a main reflector, a sub-reflector provided near the focal point of the main reflector, and a power feeder provided to the main reflector, wherein the sub-reflector has one end. What is claimed is: 1. A parabolic antenna comprising: a dielectric member fixed to the power feeder, the other end of which is engaged with and supported by the power feeder.