Miniature C-band band-pass filter with low insertion loss and excellent high-order harmonic suppression

Abstract

The invention discloses a miniature C-band band-pass filter with low insertion loss and excellent high-order harmonic suppression, which comprises an input port, an output port, an input inductor, an output inductor, an input capacitor, an output capacitor, five parallel resonance units, four zero set units, two cross-coupled capacitors and the like. All components comprise more than two layers and are realized by low-temperature co-fired ceramic technology, the input inductor, the output inductor, the input capacitor and the output capacitor are in a strip line design according to distributed parameters, intervalve inductors and intervalve capacitors adopt space coupling and distributed parameters, the cross-coupled capacitors are dielectric tablet 'Z'-shaped capacitors, and all the five parallel resonance units are in a three-layer folding and coupling strip line design. The band-pass filter of a stacked structure based on the low-temperature co-fired ceramic technology has the advantages of small size, light weight, high reliability, low insertion loss, excellent high-order harmonic suppression and the like, and meets the requirements of fields such as electronic communication and the like on miniaturization and integration of the electronic components.

Description

technical field [0001] The invention relates to a filter, in particular to a C-band low insertion loss high-order harmonic suppression miniature band-pass filter. Background technique [0002] With the rapid development of microelectronic information technology, electronic complete machines and communication products are rapidly developing in the direction of small, light and thin, which has prompted the electronic components to also tend to be miniaturized, integrated and high-frequency. In addition, with the development of communication technology, the frequency resources are increasingly tight, and the channel intervals allocated to various communication frequency bands are getting closer and closer, resulting in more and more signal interference between systems. In order to reduce the attenuation of the signal by the system and suppress various interference signals, it has become a research hotspot at home and abroad to develop filters with narrow band, small size and hi...

AI Technical Summary

Problems solved by technology

Conventional filter design methods, such as hairpin filter structure, resonant cavity filter structure and coaxial filter structure, have large volume and insertion loss. In many applications (such as: airborne, missile-borne, aerospace communication , handheld wireless terminals, individual mobile communication terminals, etc.) are all subject to great restrictions

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