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A Dual-band Bandpass Filter Based on Electromagnetic Hybrid Coupling

A dual-band-pass, electromagnetic hybrid technology, applied in waveguide-type devices, circuits, electrical components, etc., can solve the problem of difficult bandwidth adjustment, and achieve the effect of compact structure

Inactive Publication Date: 2017-02-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a dual-frequency bandpass filter based on electromagnetic hybrid coupling, which overcomes the disadvantage that the bandwidth of the two passbands of the existing dual-frequency bandpass filter is not easy to adjust

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  • A Dual-band Bandpass Filter Based on Electromagnetic Hybrid Coupling

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment: figure 1 As shown, a dual-frequency bandpass filter based on electromagnetic hybrid coupling, the lower surface of its dielectric substrate 7 is completely covered by a metal layer, the metal layer on the upper surface includes a first input and output feeder 1, a second input and output feeder 2, The first dual-frequency resonator 3, the second dual-frequency resonator 4, the interdigitated capacitor 5, the short-circuit stub 6, and the metallized through hole 34 in the dielectric substrate 7 connect the metal layers on the upper and lower surfaces.

[0013] Further, the first and second input and output feeders 1 and 2 are 50-ohm microstrip lines corresponding to specific substrate parameters, which are respectively connected to the middle of the first high-impedance microstrip line 32 of the first and second resonators; The first resonator 3 and the...

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Abstract

The invention discloses a dual-frequency bandpass filter based on electromagnetic hybrid coupling, which has the following structure: the lower surface of a dielectric substrate (7) is completely covered by a metal layer, and the metal layer on the upper surface includes a first input and output feeder (1) , the second input and output feeder (2), the first dual-frequency resonator (3), the second dual-frequency resonator (4), the interdigitated capacitor (5), the short-circuit stub (6), and the dielectric substrate (7) The metallized through holes (34) connect the metal layers on the upper and lower surfaces. Electric coupling is generated between the first dual-frequency resonator (3) and the second dual-frequency resonator (4) through the interdigital capacitance (5), and magnetic coupling is also generated through the short-circuit branch (6). The advantage of this hybrid coupling is that the electrical coupling can independently adjust the bandwidth of the first passband, and the magnetic coupling can independently adjust the bandwidth of the second passband. The invention has the advantages of compact structure, easy integration and fast processing cycle, and can be used in dual-frequency transceivers to play the role of frequency selection.

Description

technical field [0001] The invention relates to a dual-frequency bandpass filter, which belongs to the technical field of microwave passive devices. Background technique [0002] With the rapid development of wireless communication technology, people continue to propose new communication standards and develop new technologies, such as from the early GSM, CDMA, WCDMA to the current TD-SCDMA, WLAN, WiMAX, etc., the frequency band division is getting finer and finer. The multi-band communication system that can be compatible with various existing communication resources at the same time has become a research hotspot. Using multi-band transceivers, compared with multiple single-band transceivers, due to the use of multi-frequency front-end devices such as multi-frequency antennas, multi-frequency filters, and multi-frequency low-noise amplifiers, the volume of the system can be reduced by more than half. Many devices are shared or reused, the system power consumption is also re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/203
Inventor 林先其程飞张瑾江源宋开军樊勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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