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A high frequency ratio dual pass band filter based on mode composite transmission line

A dual-passband filter and transmission line technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve problems such as imperfect filter design theory, achieve good out-of-band suppression, and reduce processing costs.

Pending Publication Date: 2018-12-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the theory of filter design based on mode composite coplanar waveguide is not perfect, and it has the value of research

Method used

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  • A high frequency ratio dual pass band filter based on mode composite transmission line
  • A high frequency ratio dual pass band filter based on mode composite transmission line

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Embodiment Construction

[0015] Such as figure 1 As shown in the structural diagram of a large-frequency-ratio dual-passband filter based on a mode composite transmission line, a large-frequency ratio dual-passband filter based on a mode composite transmission line includes a microstrip conductor 11, a microstrip floor 12, Interdigitated capacitor transition structure 2, microstrip line gradient transition structure 3, mode composite transmission line 4, stepped impedance low-pass filter 5, quarter-wavelength short-circuit stub stepped impedance bandpass filter 6, substrate integrated waveguide filter 7 , dielectric substrate 8, the high frequency ratio dual-passband filter based on the mode composite transmission line adopts a low-loss Rogers 5880 substrate with a thickness of 0.508mm, and the interdigitated capacitance transition structure 2 is located on the microstrip line floor 12 and the mode composite Between the transmission lines 4 and on the lower surface of the dielectric substrate 8, the n...

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Abstract

The invention discloses a high frequency ratio dual-pass band filter based on a mode composite transmission line, comprising a microstrip line conductor, a microstrip line floor, an interdigital capacitor transition structure, a microstrip line gradual transition structure, a mode composite transmission line, a stepped impedance low-pass filter, a quarter-wavelength short-circuit branch stepped impedance band-pass filter, a substrate integrated waveguide filter and a dielectric substrate. The invention is applicable to the miniaturized dual-pass band filter design of the microwave and millimeter wave broadband and multi-frequency system, and has the advantages that only a single-layer substrate is required to realize the ultra-large frequency ratio dual-pass band filter, the out-of-band rejection between the two passbands is high, and the two passbands can be designed independently.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter wave dual passband filters, and relates to a large frequency ratio dual passband filter based on mode composite transmission lines Background technique [0002] As an important part of the wireless communication system, the filter plays a vital role in the performance of the whole system. With the development of broadband and multi-frequency microwave and millimeter wave systems, the demand for broadband, multi-passband, high-performance, and miniaturized filters is also increasing. Among them, the multi-passband filter can effectively reduce the number of system channels and simplify the system architecture. For traditional dual-passband filters, the high-order harmonics or degenerate modes of the resonator are usually used for design, but this design method is difficult to achieve independent design of the two passbands, and it is difficult to achieve a large frequency ratio D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203H01P1/20
CPCH01P1/20H01P1/203
Inventor 林先其苏一洪于家伟樊勇樊钰路金广闻程钰间宋开军
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA