Miniaturized broadband band-pass filter based on spiral resonators

A bandpass filter and spiral resonator technology, applied in resonators, waveguide devices, circuits, etc., can solve problems such as unavoidable grounding, reduce filter size, increase coupling strength between resonators, etc., and achieve easy broadband characteristics, improved stop-band rejection, and the effect of increasing the smaller size

Inactive Publication Date: 2014-09-17
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0006] In view of this, the main purpose of the present invention is to provide a miniaturized broadband bandpass filter based on spiral resonators, to solve ...

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  • Miniaturized broadband band-pass filter based on spiral resonators
  • Miniaturized broadband band-pass filter based on spiral resonators
  • Miniaturized broadband band-pass filter based on spiral resonators

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0025] Such as figure 1 As shown, the present invention provides a miniaturized wideband bandpass filter based on a spiral resonator, which is implemented in the form of a microstrip, including a microstrip substrate, a bottom layer and a top layer microstrip circuit, wherein the microstrip substrate is formed on On the bottom ground, the top-level microstrip circuit is formed on the microstrip substrate; wherein, the top-level microstrip circuit includes an input tap 5, an output tap 6 and a resonator column, and the resonator column is connected to the input tap 5 and the output tap 6 between. The relative dielectric constant of the microstrip substrate is 1-100, and the thickness is 0.05-5mm. The miniaturized broadba...

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Abstract

The invention discloses a miniaturized broadband band-pass filter based on spiral resonators. The miniaturized broadband band-pass filter is realized in a microstrip form and comprises a microstrip substrate, a bottom layer ground and a top layer microstrip circuit, wherein the microstrip substrate is formed on the bottom layer ground, the top layer microstrip circuit is formed on the microstrip substrate, and the top layer microstrip circuit comprises an input tap, an output tap and a resonator array connected between the input tap and the output tap. The coupling strength between the resonators is greatly improved by adopting nest coupling, the tap type feeding mode is combined, and the broadband band-pass filter is easy to realize. The resonators are simple and compact in structure, convenient to machine and manufacture and suitable for microwave integrated circuits.

Description

technical field [0001] The invention relates to the technical field of microstrip filters, in particular to a miniaturized wideband bandpass filter based on a spiral resonator. Background technique [0002] Filters are important passive components that are indispensable for suppressing interfering signals in wireless communication systems. With the rapid development of wireless communication, the requirements for communication channel capacity are increasing day by day, and it is necessary to use broadband filters for broadband signal processing to improve the channel capacity of the entire system. [0003] In microwave / RF equipment for communications, bandwidth is usually expressed in Hertz (Hz). From the perspective of bandwidth, a relative bandwidth greater than 20% or an absolute bandwidth greater than 1GHz is a broadband filter. Among them, relative bandwidth BW=(f 2 -f 1 ) / f 0 . f 2 and f 1 are the upper and lower cut-off frequencies of the passband, f 0 is th...

Claims

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Application Information

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IPC IPC(8): H01P1/203H01P7/00
Inventor 杜泽保杨浩张海英
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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