Micro band-pass filter for suppressing Ku-band harmonic waves into millimeter waves

Abstract

The invention relates to a micro band-pass filter for suppressing Ku-band harmonic waves into millimeter waves. The micro band-pass filter comprises a 50 omega impedance input / output interface suitable for surface mounting, four parallel resonance units realized by two layers of folded and coupled band-shaped lines, three cascade inductors, one oblique Z-shaped crossed and coupled capacitor as well as an input inductor and an output inductor, wherein the components of the micro band-pass filter are all realized by a multi-layer low-temperature co-fired ceramic process technology. The micro band-pass filter has the advantages of good band-pass selectivity, long out-of-band rejection, small volume, light weight, high reliability, good electric property, good phase frequency characteristic linearity, good temperature stability, good electrical property batch uniformity, low cost, suitability for large-batch production and the like, and is in particular suitable for wireless communication handheld and portable terminal products such as terminals of radar, communication, rocket-borne, airborne, missile-borne, spaceship, one-man mobile communication and the like, and occasions and corresponding frequency band systems with severe requirements on the volume, the electrical property and the reliability and the like.

Description

technical field [0001] The invention relates to a filter, in particular to a miniature band-pass filter for suppressing Ku-band harmonics to millimeter waves. Background technique [0002] With the development of microwave and millimeter wave communication, 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 Among them, the miniature bandpass filter for Ku-band harmonic suppression to millimeter wave is the key electronic component in the receiving and transmitting branches of this band, and its performance often directly affects the performance index 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 ...

AI Technical Summary

Problems solved by technology

Conventional design and manufacturing methods are large in size, such as filters composed of metal resonators, microstrip line filters, block dielectric filters, etc., which are too large to meet the requirements of miniaturization; and surface acoustic wave filters are used Although the size can be reduced, its electrical performance has the disadvantages of temperature drift, high cost, and large insertion loss, and this technology cannot be realized in the Ku-band. It requires high temperature stability, low cost, excellent performance, and volume. Applications where small size, light weight, and high reliability are severely constrained

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