Disposable radiator

Abstract

The invention provides a primary radiator with excellent assembly performance and low manufacturing cost. A metal plate is wound into a cylindrical shape, and the waveguide 1 is formed by overlapping both ends of the waveguide 1 at the joint part 1a, and the inner peripheral surface of the waveguide 1 is alternately formed at intervals of about 90 degrees along the center. The two first flat portions 1c and the two second flat portions 1d extending in the axial direction form a total of four flat portions. The dielectric feeder 2 has a radiation part 5, an impedance conversion part 6, and a phase conversion part 7. By inserting the dielectric feeder 2 into the waveguide 1, both side surfaces 7a of the phase conversion part 7 are press-fitted and fixed to the first flat part. 1c, and the two mounting surfaces of the outer peripheral surface of the impedance transformation part 6 are press-fitted and fixed on the second flat part 1d, so that the phase transformation part 7 is about 45° away from the probe 4 protruding in the direction of the central axis of the waveguide 1. degree angles to intersect with it.

Description

technical field [0001] The present invention relates to a primary radiator used for satellite broadcast reflective antennas, etc., especially to a primary radiator for radiating and receiving circularly polarized electromagnetic waves. Background technique [0002] Refer to soil 4 and Figure 15 A conventional example of such a primary radiator is described, Figure 14 is a cross-sectional view of an existing primary radiator, figure 1 is a front view of the primary radiator viewed from its horn. As shown in these figures, the prior art primary radiator is equipped with: a waveguide 210 having a horn portion 210a at one end and a circular waveguide 210 having its other end as a closed surface 210b; A pair of protuberances 211 on the inner wall surface of 210; and a probe 212 disposed between the protuberances 211 and the closed surface 210b. [0003] The waveguide 210 is made by die-casting metal materials such as zinc and aluminum, and the two protrusions 211 are integr...

AI Technical Summary

Problems solved by technology

Adhesives are generally used as a method of fixing such a phase shifter. However, in this method of fixing with an adhesive, it is necessary to attach the phase shifter to the inner wall surface of the waveguide while the phase shifter is positioned with a jig. There is a problem of poor assembly workability due to the complicated process of applying adhesive to the joint part of the phase shifter

In addition, as another fixing method, a method of fixing the phase shifter to the inside of the waveguide using screws has also been proposed. However, in this case, since the tip portion of the screw protrudes into the inside of the waveguide, there is a problem with the screw The problem that the front part of the front end reflects electromagnetic waves and deteriorates its performance

Images