Miniature dual microwave and millimeter wave self-load I/Q quadrature filter

Abstract

The invention discloses a miniature dual microwave and millimeter wave self-load I / Q quadrature filter which comprises a directional coupler and two microwave and millimeter wave filters. Wherein the directional coupler is in self connection with a matched load and the two microwave and millimeter wave filters are each of a strip line structure. The directional coupler in self connection with the matched load comprises a surface-mounted input / output interface, a broadside coupling strip line of a dual spiral structure and the matched load in self connection with an isolation port. The two microwave and millimeter wave filters each comprise a surface-mounted output interface and a six-level parallel resonance unit achieved through the strip line structure, and the structures are achieved through the multi-layer low temperature co-fired ceramic process technology. The miniature dual microwave and millimeter wave self-load I / Q quadrature filter has the advantages of being free of any external load, capable of generating a quadrature phase, easy to debug, small in insertion loss, light, small in size, high in reliability, good in electrical performance, good in temperature stability, good in electrical performance batch consistency, low in cost and the like, and is suitable for communication of corresponding millimeter wave frequency bands, satellite communications, and other occasions and corresponding systems having strict requirements for sizes, electrical performance, temperature stability and reliability.

Description

technical field [0001] The invention relates to a filter, in particular to a miniature double microwave millimeter wave self-loaded I / Q quadrature filter. Background technique [0002] In recent years, with the rapid development of miniaturization of mobile communication, satellite communication and national defense electronic systems, high performance, low cost and miniaturization have become the development direction of the microwave / radio frequency field. The performance, size and reliability of microwave filters Both sex and cost have put forward higher requirements. In some cutting-edge defense equipment, the current frequency bands are quite crowded, so cutting-edge equipment such as satellite communications are developing towards the millimeter-wave band, so microwave millimeter-wave band filters have become key electronic components in the receiving and transmitting branches of this band, described The main indicators of the performance of this component are: passba...

AI Technical Summary

Problems solved by technology

Moreover, the filter used in the traditional situation does not have an orthogonal function, but is realized by an external orthogonalizer

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