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Tri-band planar filter based on multi-mode resonators

A multi-mode resonance, three-band technology, applied to waveguide devices, electrical components, circuits, etc., can solve the problems of large volume and complex structure, and achieve the effect of small volume, high degree of design freedom, and volume reduction

Pending Publication Date: 2019-05-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional method to obtain a triple-frequency filter is to connect three groups of single-frequency resonators in parallel, but the outstanding problem is that the structure is complex and the volume is large

Method used

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  • Tri-band planar filter based on multi-mode resonators
  • Tri-band planar filter based on multi-mode resonators
  • Tri-band planar filter based on multi-mode resonators

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific examples.

[0020] Such as figure 1 As shown, the multi-mode resonator-based three-band planar filter provided by this embodiment is fabricated on a double-sided copper-clad microstrip board in the form of a printed circuit board, and one side of the double-sided copper-clad microstrip board is a microstrip The other side of the belt routing layer is a copper-clad grounding plate, and the middle is a dielectric layer. The feeder 1, the first multimode resonator 2 arranged above the feeder 1, and the first multimode resonator 2 arranged on the feeder 1 below the second multimode resonator 3, the first multimode resonator 2 and the second multimode resonator 3 are independently adjustable.

[0021] There are two feeders 1 and form a left-right mirror symmetrical structure, the two feeders 1 are coupled to each other through the gap between them, and feed or feed the first multi-mode resona...

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Abstract

The invention discloses a tri-band planar filter based on multi-mode resonators. The tri-band planar filter is manufactured on a double-sided copper-clad micro-strip board in the form of a printed circuit board. One surface of the double-sided copper-clad micro-strip board is a micro-strip wiring layer, and the other surface of the double-sided copper-clad micro-strip board is a copper-clad grounding board. A dielectric layer is arranged in the middle of the double-sided copper-clad micro-strip board. A feeder line, a first multi-mode resonator arranged above the feeder line and a second multi-mode resonator arranged below the feeder line are manufactured on the micro-strip wiring layer. The first multi-mode resonator and the second multi-mode resonator are independently adjustable. The two feeders form a left-right mirror symmetry structure and are coupled with each other through a gap between the two feeders. The first multi-mode resonator is a double-frequency four-mode resonator composed of a first resonant body, a T-shaped loading branch and two open circuit loading branches. The second multi-mode resonator is a single-frequency dual-mode resonator composed of a second resonant main body and an inverted T-shaped loading branch. The tri-band planar filter based on multi-mode resonators has the advantages of simple structure, flexible design, convenient debugging, small sizeand the like.

Description

technical field [0001] The invention relates to the technical field of planar microstrip filters, in particular to a three-band planar filter based on a multimode resonator. Background technique [0002] With the rapid development of wireless communication technology, the division between frequency bands is getting finer and finer, so the interference between communication frequency bands is becoming more and more serious, so the performance of the bandpass filter determines the working quality of the communication system. Band-pass filter means to allow waves of a specific frequency band to pass through while shielding other frequency bands. It mainly works on the front stage of the signal transmitting end and the rear stage of the signal receiving end to suppress harmonic and clutter signals and ensure the purity of the required signal. . At present, there are mainly researches on single-frequency filter and double-frequency filter in the bandpass filter. The single-freq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 陈继鹏王云陈付昌
Owner SOUTH CHINA UNIV OF TECH
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