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Miniature high-performance double-zero-point double-mode ultra-narrow band filter

A high-performance, double-zero technology, used in waveguide-type devices, circuits, electrical components, etc., can solve the problem of difficult transmission of microstrip filters and LC filters, harsh processing requirements, good filtering and narrowband characteristics, etc. problem, to achieve a lightweight, deconstructed compact, flat in-band effect

Inactive Publication Date: 2014-12-24
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface acoustic wave filter has better filtering characteristics, but its production cost is relatively high and the requirements for processing technology are relatively strict, and the yield rate is low
Microstrip filters and LC filters are not easy to achieve transmission zero and their large size is not conducive to miniaturization and integration
The prior art has the defect of being unable to realize better filtering and narrowband characteristics, miniaturization, high yield and low cost at the same time

Method used

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  • Miniature high-performance double-zero-point double-mode ultra-narrow band filter
  • Miniature high-performance double-zero-point double-mode ultra-narrow band filter
  • Miniature high-performance double-zero-point double-mode ultra-narrow band filter

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Embodiment 1

[0035] The first double-mode resonator B1 first strip line C3 of the novel three-dimensional miniature dual-mode broadband filter of the present invention, the first double-mode resonator B1 second strip line C4, the second dual-mode resonator B2 first strip line The dimensions of the stripline C8 and the second double-mode resonant cavity B2 and the second stripline C9 are 1.52mm×0.5mm, 1.8mm×0.4mm, 1.8mm×0.5mm and 1.9mm×0.6mm respectively

[0036] The size of a miniature high-performance dual-zero dual-mode ultra-narrowband filter of the present invention is only 4.8mm × 4.2mm × 1.5mm, and its simulation performance can be obtained from Figure 4 It can be seen that the center frequency of the passband is 2.75GHz, the passband is 2.71GHz to 2.78GHz, the relative bandwidth is very narrow only 3.5%, the minimum insertion loss in the passband is 2dB, and the return loss of the input port is better than 17.7dB. Two zeros are created and the out-of-band rejection is better.

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Abstract

The invention relates to a miniature high-performance double-zero-point double-mode ultra-narrow band filter. The miniature high-performance double-zero-point double-mode ultra-narrow band filter comprises input / output ports, input and output inductors, source and load coupling strip lines and three double-mode resonators, wherein the three double-mode resonators are achieved with a strip line structure. All the structures are achieved through the multi-layer low-temperature cofiring ceramics. The miniature high-performance double-zero-point double-mode ultra-narrow band filter has the advantages that the frequency coverage range is wide, the relative band width is small, the insertion loss is small, the weight is light, the size is small, the reliability is high, the electrical performance is good, the temperature stability is good, the electrical performance batch consistency is good, cost is low, and large-batch production can be achieved. The miniature high-performance double-zero-point double-mode ultra-narrow band filter is suitable for narrow-band communication systems, such as communication and satellite communication at radio frequency, the microwave frequency band and the millimeter wave frequency band, having quite high requirements for the size, the electrical performance, the temperature stability and the reliability.

Description

technical field [0001] The invention relates to a radio-frequency microwave filter, in particular to a miniature high-performance double-zero double-mode ultra-narrowband 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 朱丹邓良陈相治李雁戴永胜
Owner NANJING UNIV OF SCI & TECH
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