Microwave electrically-tunable band-stop filter with high suppression degree and wide tuning range

A band-stop filter, wide-tuning technology, applied in waveguide-type devices, circuits, electrical components, etc., can solve the problems of narrow tuning range and low stopband suppression, achieve high suppression and wide tuning range, reduce The effect of ground inductance

Active Publication Date: 2019-07-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a microwave electronically adjustable band-rejection filter with high rejection and wide tuning range, so

Method used

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  • Microwave electrically-tunable band-stop filter with high suppression degree and wide tuning range
  • Microwave electrically-tunable band-stop filter with high suppression degree and wide tuning range
  • Microwave electrically-tunable band-stop filter with high suppression degree and wide tuning range

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

[0026] Such as figure 1 As shown, the microwave electrically tunable band-stop filter with high rejection and wide tuning range provided by the embodiment of the present invention includes a substrate (not shown in the drawings), an input port 1, an output port 2, a first microstrip line 3 and Several resonant units 4, input port 1, output port 2, first microstrip line 3 and several resonant units 4 are mounted on the substrate.

[0027] One end of the first microstrip line 3 is directly connected to the input port 1 , the other end of the first microstrip line 3 is directly connected to the output port 2 , and the resonance unit 4 is coupled to the first microstrip line 3 .

[0028] The resonant unit 4 includes a second microstrip line 5, a resis...

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Abstract

The invention discloses a microwave electrically-tunable band-stop filter with high suppression degree and wide tuning range. A plurality of resonance units are distributed and coupled through the first microstrip line, and band-stop filter response with the high suppression degree is achieved. At the same time, in each resonance unit, a cathode of a varactor diode D1 and a cathode of a varactor diode D2 are mutually connected through a third microstrip line to form a pair of varactors which are reversely connected in series, and a direct current bias circuit is added to the cathode of the varactor diode D1 and the cathode of the varactor diode D2, and the capacitance values of the varactor diodes D1 and D2 can be adjusted by changing direct current bias voltage, so that the stop band frequency response is adjusted. In addition, the tail end of each resonance unit is grounded through two metallized through holes, so that grounding inductance can be effectively reduced, and the realization of the high suppression degree and the wide tuning range of the microwave electrically-tunable band-stop filter can be facilitated.

Description

technical field [0001] The invention relates to microwave device technology, in particular to a microwave electric tuning band-stop filter with high suppression degree and wide tuning range. Background technique [0002] The microwave electronically adjustable band-stop filter is an important adjustable microwave component. By changing the DC bias voltage and adjusting the capacitance value of the varactor diode, the center frequency of the stop band can be adjusted. Modern radar and wireless communication systems need to work on different frequencies. In order to improve the integration of the system, a reconfigurable RF front-end is required. The microwave electrically tunable band-stop filter is an important part of the reconfigurable RF front-end, which is used to suppress the interference signal in the system. In practical applications, microwave electronically adjustable band-stop filters are required to have high rejection and wide tuning range, so as to improve syst...

Claims

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Application Information

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IPC IPC(8): H01P1/208
CPCH01P1/2082
Inventor 杨涛李群陈雄
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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