Miniature ultra wide band electrically tunable filter

An ESC filter and ultra-wideband technology, applied in electrical components, impedance networks, multi-terminal-pair networks, etc., can solve the problem of the large size of the motor tuner, and achieve the effect of improving out-of-band suppression

Inactive Publication Date: 2009-09-16
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

Although the patent does not mention specific parameter indicators, since this technology uses a motor to tune the waver, it is very bulky and is suitable for high-power transmission occasions

Method used

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  • Miniature ultra wide band electrically tunable filter
  • Miniature ultra wide band electrically tunable filter
  • Miniature ultra wide band electrically tunable filter

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing:

[0021] Such as figure 2 As shown, the circuit structure of the electronically adjustable filter is mainly composed of four units: 1) Impedance transformation unit, 2) Resonant unit, 3) Resonant coupling unit, 4) Resonant control voltage unit, these four circuit units are organically interconnected Connecting and combining can realize ultra-wideband electronically adjustable filter characteristics. The impedance transformation unit adopts the combination of three independent inductance or capacitance taps, and the impedance transformation unit is respectively placed at the input and output ends to realize the impedance change. The resonant unit adopts inductance and two sets of series varactor diodes in parallel to form a resonant point, and the resonant unit can be arbitrarily selected from 2 to 10 in the circuit. The resonant coupling unit is composed of three independe...

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Abstract

The invention discloses a miniature ultra wide band electrically tunable filter, characterized in that: a circuit structure comprises two impedance conversion units, N resonance units, (N-1) resonance coupling units and N resonance control voltage units; the impedance conversion units are placed at an input end and an output end of the circuit to realize impedance conversion, the (N-1) resonance coupling units connected in series are correspondingly connected with the N resonance units at two ends and two adjacent contact points, and the N resonance control voltage units are correspondingly connected with and control the N resonance units in order to realize different resonance points. The filter has the advantages of small volume, ultra wide band continuous electric tuning, high rectangular degree, narrow-band strobe and the like, and is extensively applied to interception, front-end of receiver and the like.

Description

technical field [0001] The invention relates to the technical field of radio frequency filters, in particular to a miniaturized ultra-wideband electric tuning filter. Background technique [0002] With the development of microelectronics and communication technology, the fields of frequency hopping communication, broadband communication and interception, electronic countermeasures, etc. The selection of signals and the suppression of interference signals, the filter components play an important role in the communication quality of the entire communication system in terms of volume, selectivity, and bandwidth. Due to its own technical limitations, the current general-purpose filter components have problems such as large volume and wide bandwidth. Due to the continuous advancement of integrated circuit technology, other components except filter components in the RF front-end tend to be miniaturized and integrated. The volume of filter components accounts for 80% of the entire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/01
Inventor 赵宝林石玉雷瑶何泽涛王华磊钟慧
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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