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Quasi-lumped element ultra-wideband band-pass filter, and preparation method and application of quasi-lumped element ultra-wideband band-pass filter

A technology of band-pass filter and microstrip filter, which is applied in the direction of electrical components, waveguide devices, circuits, etc., can solve the problem of being unable to efficiently manufacture high-performance ultra-wideband filters, and achieve optimized out-of-band performance and high Effects of out-of-band rejection and small insertion loss

Active Publication Date: 2020-10-09
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is in order to overcome the defective of prior art, in order to solve the problem that prior art can't make high-performance ultra-wideband filter efficiently, propose a kind of high-performance extremely wide-band band-pass filter based on low-pass prototype and quasi-lumped element How to make a filter

Method used

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  • Quasi-lumped element ultra-wideband band-pass filter, and preparation method and application of quasi-lumped element ultra-wideband band-pass filter
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  • Quasi-lumped element ultra-wideband band-pass filter, and preparation method and application of quasi-lumped element ultra-wideband band-pass filter

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Embodiment 1

[0058] This embodiment is used to illustrate the preparation method of the quasi-lumped element ultra-broadband bandpass filter of the present invention.

[0059] Such as figure 1 Shown is the quasi-lumped element schematic diagram that the present invention adopts, wherein figure 1 (a) is the broken line inductance, figure 1 (b) is a chip capacitor, figure 1 (c) is the finger capacitance. The broken line inductance represents the series inductance, the chip capacitor represents the parallel capacitance, and the finger capacitance represents the series and parallel capacitance.

[0060] Such as figure 2 Shown is a schematic diagram of the prototype circuit of the low-pass filter used in the present invention, which is formed by alternately connecting series inductors and parallel capacitors, and one end of the parallel capacitors is connected to the ground.

[0061] Such as image 3 Shown is to figure 1 (a)(b) elements in accordance with figure 2 Schematic diagram of...

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Abstract

The invention provides a quasi-lumped element ultra-wideband band-pass filter which is made of a superconducting thin film of a three-layer structure, wherein the bottom layer of the superconducting thin film is a grounded superconducting layer, the middle layer of the superconducting thin film is a dielectric medium, and a microstrip circuit is engraved on the superconducting layer on the top layer. The invention further provides a preparation method and application of the quasi-lumped element ultra-wideband band-pass filter. According to the quasi-lumped element ultra-wideband band-pass filter, a part of sheet capacitors in a microstrip low-pass circuit are replaced by interdigital capacitors, under the condition that the number of elements is not increased, a low-pass circuit is changedinto a band-pass circuit, the effect of independently regulating and controlling the low-frequency or high-frequency cut-off frequency of the filter can be achieved by changing parameters of interdigital capacitors or a broken line inductor and a chip capacitor, and the quasi-lumped element ultra-wideband band-pass filter has the advantages of extremely low insertion loss, extremely high out-of-band rejection and extremely wide bandwidth.

Description

technical field [0001] The invention belongs to the field of radio frequency or microwave engineering technology filters, and relates to a quasi-lumped element extremely wideband bandpass filter, a preparation method and application thereof. Background technique [0002] In a communication system, the performance of the filter directly affects the performance of the entire system. Therefore, in extreme environments or special scenarios, high-performance filters have great advantages. On the other hand, ultra-wideband technology has the advantages of high speed, low power consumption, and strong anti-interference ability. Therefore, high-performance ultra-wideband bandpass filters are widely used in communications, radar, guidance, electronic countermeasures, radio astronomy and other fields. An essential component in many communication systems. [0003] In the prior art, the design method of an extremely wideband bandpass filter is usually implemented by using a coupled res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/212H01P1/203H01P11/00
CPCH01P1/212H01P1/203H01P11/007
Inventor 代金豪吴云袁跃峰王佳王旭李国强李春光张雪强孙亮何豫生
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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