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Novel double-passband filter

A double-pass band filter, a new type of technology, is applied in waveguide devices, electrical components, circuits, etc., which can solve the problems of large volume, difficult design, and poor versatility of the double-pass band filter, and achieve a compact and compact structure design. The effect of changing the center frequency and passband width and reducing the size

Active Publication Date: 2017-12-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to provide a dual-passband filter with a simple structure, small size, high frequency selectivity, and good inter-band isolation for the problems of large volume, complex structure, difficult design, and poor versatility in the prior art. dual pass band filter

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Embodiment

[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0044] Such as figure 1 , figure 2 As shown, the double-pass band filter in this embodiment includes a dielectric substrate 1 provided with a first ground via hole 11 and a second ground via hole 11', a main line 2 located on the upper surface of the dielectric substrate 1, and a dielectric substrate located on the dielectric substrate 1. Metal floor 3 on the lower surface of the substrate. The main line 2 is composed of a first second-order composite resonator 5 and a second second-order composite resonator 5' distributed axially symmetrically.

[0045] Such as Figure 5 As shown, the first s...

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Abstract

The invention discloses a novel double-passband filter, and the filter comprises a dielectric substrate provided with a grounding through hole, a main circuit and a metal floor. The main circuit comprises two second-order composite resonators which are arranged symmetrically, wherein each second-order composite resonator comprises one grounding through hole. The two symmetric second-order composite resonators are coupled through the grounding through holes. The second-order composite resonators are respectively of a symmetric structure, and respectively comprise an external second-order impedance resonation unit and an internal second-order impedance resonation unit, wherein the second-order impedance resonation units are connected with each other through the grounding through holes, and achieve the grounding. Each second-order impedance resonation unit comprises an internal resonator and an internal resonator, and the external second-order impedance resonation unit is provided with an open-circuit transmission line. The electric coupling, magnetic coupling or cross coupling is formed between the resonators. The filter achieves the miniaturization, and the central frequency and bandwidth of the filter are easy to control. The filter is high in frequency selectivity, is good in inter-band isolation, is compact in structure, and is small and exquisite.

Description

technical field [0001] The invention belongs to the technical field of microwave communication, and in particular relates to a novel double-passband filter. Background technique [0002] Today's spectrum resources are becoming increasingly tight. In order to improve spectrum utilization efficiency, increase information capacity and reduce interference between frequency bands, higher requirements are put forward for filter design. In addition to better out-of-band attenuation, farther out-of-band rejection, and better frequency selectivity, the rapid development of multi-passband communication has allowed multi-channel filters to be valued, and it has the advantage of high utilization of spectrum resources. At present, there are several ways to realize dual-passband filters: (1) A dual-band filter is formed by cascading two single-band filters, but it often needs to be accompanied by a matching network, which is not conducive to miniaturization; (2) In the The transmission z...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
CPCH01P1/20381
Inventor 石玉胡越尉旭波吕洪光钟慧
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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