Millimeter directional coupler based on plug-in type dielectric film sheet

Abstract

The invention discloses a millimeter directional coupler based on a plug-in type dielectric film sheet. The millimeter directional coupler comprises an upper cavity, a dielectric film sheet, an intermediate section, a bearing cavity. The upper cavity, the intermediate section and the bearing cavity are orderly laminated from the top to the bottom. The upper surface of the intermediate section is provided with a bearing groove which accommodates the dielectric film sheet, and the lower surface is provided with an input port, a straight-through port and a primary waveguide transmission channel which connects the input port and the straight-through port. The lower surface of the upper cavity is provided with an isolation port, a coupling port and a secondary waveguide transmission channel which connects the isolation port and the coupling port. The dielectric film sheet is equidistantly provided with multiple metallized through holes of equal radius along a longitudinal center line. The electrical performance index of the coupler can be flexibly adjusted by replacing the dielectric film sheet of different through hole diameters, and the rest structures apart from the dielectric film sheet can be reserved and generally used so that the millimeter directional coupler has advantages of being lower in cost, shorter in realization period and more convenient and flexible in adjustment and can be suitable for the directional coupler of the millimeter wave frequency band.

Description

technical field [0001] The invention relates to a passive device, in particular to a millimeter directional coupler based on a plug-in dielectric diaphragm, and belongs to the technical field of communication equipment. Background technique [0002] In modern testing, communication and radar systems, directional couplers are often used. Its main function is to let the energy signal in the main channel pass through with the lowest possible loss, and at the same time couple out a part of the energy for envelope, power or spectrum. detection. In the microwave frequency band, directional couplers are usually implemented based on the microstrip line structure. As the operating frequency of the system increases and enters the millimeter wave frequency band, especially the frequency band above 60 GHz, the directional coupler based on the microstrip line structure suffers from dielectric loss and radiation loss. and other reasons are no longer applicable, and the waveguide-based di...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a millimeter directional coupler based on a plug-in dielectric diaphragm, and solve the problem that the millimeter wave waveguide directional coupler based on a pure metal structure relies too much on metal processing capabilities in the prior art. Technical problems of accuracy, poor versatility of coupler structural parts, lack of performance adjustment and replaceable measures

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