Quasi-lumped element extremely wideband bandpass filter and its preparation method and application

A band-pass filter and ultra-wideband technology, applied in electrical components, waveguide-type devices, circuits, etc., can solve problems such as the inability to efficiently manufacture high-performance ultra-wideband filters, and achieve optimized out-of-band performance and precise design. Effects of flow, high edge steepness

Active Publication Date: 2021-12-28
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • 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 extremely wideband bandpass filter and its preparation method and application
  • Quasi-lumped element extremely wideband bandpass filter and its preparation method and application
  • Quasi-lumped element extremely wideband bandpass filter and its preparation method and application

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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-broadband bandpass filter. The quasi-lumped element ultra-broadband bandpass filter is made of a superconducting thin film with a three-layer structure, and the bottom layer of the superconducting thin film is a grounded superconducting layer , the middle layer is a dielectric, and the top superconducting layer is engraved with a microstrip circuit; the preparation method and application thereof are also provided. In the present invention, by replacing part of the chip capacitors in the microstrip low-pass circuit with finger capacitors, the low-pass circuit is transformed into a band-pass circuit without increasing the number of components, and by changing the finger capacitor or broken line inductance and chip The parameters of the shape capacitor can achieve the effect of independently adjusting the low-frequency or high-frequency cut-off frequency of the filter. The filter has 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 Patents(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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