Hybrid lumped distribution miniature band-pass filter

Abstract

The invention relates to a hybrid lumped distribution miniature band-pass filter. The hybrid lumped distribution miniature band-pass filter comprises a 50-ohmage input-output port installed on the surface, four parallel-connection resonance units, two interstage coupling inductors, a interstage coupling capacitor, a Z-shaped cross coupling capacitor and an input/output inductor which are all achieved through the multilayer low-temperature co-fired ceramic technical skill. The hybrid lumped distribution miniature band-pass filter has the advantages of being good in band-pass selectivity and out of band rejection, low in insertion loss, light in weight, small in volume, high in reliability, good in electric performance, phase-frequency characteristic linearity, temperature stability and electric performance batch uniformity, low in cost, capable of being produced massively and the like, and is especially applicable to radars, communication, rocket carrying, plane carrying, missile carrying, spacecrafts, man-portable mobile communication terminals and other wireless communication handheld and portable terminal products and corresponding frequency range systems with strict requirements for volume, weight, electric performance, reliability and the like.

Description

technical field [0001] The invention relates to a filter, in particular to a hybrid lumped distribution miniature band-pass filter. Background technique [0002] In microwave communication systems, radar and other systems, especially mobile handheld wireless communication terminals, individual satellite mobile communication terminals, military and civilian multi-mode and multi-channel communication system terminals, airborne, missile-borne, and aerospace communication systems, mixed Lumped distributed miniature bandpass filters are key electronic components in the receiving and transmitting branches of this band, and their performance often directly affects the performance indicators of the entire communication system. The main technical indicators describing the performance of this component are: passband operating frequency range, stopband frequency range, passband input / output voltage standing wave ratio, passband insertion loss, stopband attenuation, shape factor, temper...

AI Technical Summary

Problems solved by technology

Conventional design and manufacturing methods are at the low end of microwave frequency (300MHz~1GHz). Due to the long wavelength (wavelength 0.3m to 1m), the volume of the filter is proportional to the working wavelength, so the volume is relatively large (generally about 45mm× 32mm×8 mm); such as filters made of metal resonators, microstrip line filters, block dielectric filters, etc., are too large to meet the requirements of miniaturization; and the use of surface acoustic wave filter technology, although volume It can be reduced, but its electrical performance has the disadvantage of temperature drift, high cost and large insertion loss, which are greatly restricted in applications with high temperature stability requirements and low insertion loss requirements

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