A fourth-order ka-band bandpass filter based on printed ridge-gap waveguides

A technology of band-pass filter and gap waveguide, which is applied in the direction of waveguide devices, circuits, electrical components, etc., can solve the problems of high loss of microstrip circuits, achieve the effects of reducing dielectric loss, improving transmission performance, and easy system integration

Active Publication Date: 2021-06-01
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] In order to solve the problem of high loss in traditional microstrip circuits in the mm-wave band, there have been many researches on mm-wave RF passive devices based on printed ridge-gap waveguides

Method used

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  • A fourth-order ka-band bandpass filter based on printed ridge-gap waveguides
  • A fourth-order ka-band bandpass filter based on printed ridge-gap waveguides
  • A fourth-order ka-band bandpass filter based on printed ridge-gap waveguides

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Embodiment Construction

[0034] Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

[0035] The embodiment of the present invention discloses a fourth-order Ka-band bandpass filter based on printed ridge-gap waveguides, such as Figure 1-5 as shown, Figure 6-10 For the processing and manufacturing scheme of the filter, the bottom dielectric substrate, the feed dielectric layer and the top metal cover are extended in the horizontal direction and drilled, and the filter is fixed with PP screws to ensure the close fit of the three-layer structure.

[0036] The Ka-band bandpass filter includes a microstrip electromagnetic filtering str...

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Abstract

The invention discloses a fourth-order Ka-band bandpass filter based on a printed ridge gap waveguide. The filter includes a microstrip filter structure arranged on the upper surface of a dielectric substrate, a top metal cover plate and a middle layer for stabilizing The feed dielectric layer for the air gap. The microstrip filter structure includes input and output ports, two half-wavelength coupled transmission line resonators and two T-shaped resonators. By adjusting the longitudinal length of the two T-shaped resonators, two transmission zeros outside the passband can be obtained and adjusted to achieve better frequency selection, and its in-band insertion loss, relative bandwidth, in-band flatness and out-of-band rejection And other performance are better than the traditional Ka-band bandpass filter. The invention also provides a processing and manufacturing scheme, and the test results are basically consistent with the simulation results. The invention has the advantages of simple structure, small size, easy processing, stable performance, strong integrity, easy system integration with other circuits, and wide application in future millimeter wave communication transmission applications.

Description

technical field [0001] The invention relates to a fourth-order Ka-band bandpass filter based on a printed ridge gap waveguide, which can be used in the technical field of millimeter wave transmission. Background technique [0002] In microwave systems, the microstrip structure is widely used in filter design. Although the structure of the microstrip line is simple, easy to process, and low in cost, when the operating frequency rises to the millimeter wave frequency band, the microstrip line exposes the disadvantages of excessive loss and low power capacity, which comes from the noise of the microstrip line Scattering radiation, including radiation waves, leakage waves, and surface waves, and the higher the frequency, the more prominent the problem. Similarly, although the rectangular guided wave has the advantages of simple structure, high mechanical strength, low loss, and large power capacity, it inevitably has problems such as too small size, difficult processing, and di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/203
CPCH01P1/20381
Inventor 许锋金俊陈洋
Owner NANJING UNIV OF POSTS & TELECOMM
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