Radio frequency reconfigurable band-pass filter with wide bandwidth adjusting range and controllable performance

A band-pass filter and adjustment range technology, applied in waveguide-type devices, resonators, circuits, etc., can solve problems such as large insertion loss, small bandwidth adjustment range, and small return loss when large, and achieve a wide frequency adjustment range. , the filtering performance is controllable, and the effect of reducing insertion loss
CN103117426BInactive Publication Date: 2014-11-12NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF SCI & TECH
Publication Date
2014-11-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a novel radio frequency reconfigurable band-pass filter with a wide bandwidth adjusting range and controllable performance. The reconfigurable band-pass filter comprises an upper micro-strip structure, a middle dielectric substrate and lower grounded metal, wherein the upper micro-strip structure is formed by connecting an input port, an input feed network, an input adjustable impedance matching circuit, a cross adjustable multi-mode resonator, an output adjustable impedance matching circuit, an output feed network and an output port in sequence; the cross adjustable multi-mode resonator consists of two micro-strip lines which are perpendicular to each other, and four terminated variable capacitance diodes; and each of the input adjustable impedance matching circuit and the output adjustable impedance matching circuit is formed by connecting a series variable capacitance diode and a parallel variable capacitance diode. The reconfigurable band-pass filter has the advantages of wide center frequency and bandwidth adjusting range, controllable filtering performance and the like, can be reconfigured into broad-band or narrow-band band-pass filters with different center frequencies, and can be used for a reconfigurable radio frequency front end.
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Description

technical field

[0001] The invention relates to a novel radio-frequency electrically adjustable band-pass filter based on varactor diodes, in particular to a radio-frequency reconfigurable band-pass filter with wide bandwidth adjustment range and controllable performance. Background technique

[0002] ESC filter is one of the key technologies in hopping spread spectrum communication technology, anti-jamming radar, dynamic frequency allocation technology, multi-function receiver, spurious emission measurement, etc. Since World War II, electronically tunable filters have always been one of the research hotspots in various countries. In this regard, there have been some research reports, and electronically adjustable filters with various structures have been proposed. However, the rapid development of radar and communication technology in recent years has put forward higher performance requirements for electronically adjustable filters.

[0003] Modern ultra-wideband radar an...

Claims

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