Non-coaxial substrate integrated waveguide circular cavity filter
A substrate-integrated waveguide and circular cavity technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve the problems of low upper sideband performance, practical limitations, and unbalanced selective upper and lower sidebands, and achieve grounding and isolation. Convenience, accurate characteristics, and the effect of eliminating radiation loss
Inactive Publication Date: 2006-08-30
SOUTHEAST UNIV
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Problems solved by technology
Substrate integrated waveguide technology has the advantages of easy integration and convenient fabrication of planar circuits, and has excellent performance similar to metal waveguide filters, but its selective upper and lower sidebands are unbalanced, and the performance of the upper sideband is much lower than that of the lower sideband. restricted
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[0016] A non-coaxial substrate integrated waveguide circular cavity filter for microwave and millimeter wave circuits, comprising a dielectric substrate 1 with metal patches 2 and 3 on both sides, and two The substrate-integrated waveguide circular cavities 6, 7 are provided with a coupling hole 8 between the two substrate-integrated waveguide circular cavities 6, 7, and the two substrate-integrated waveguide circular cavities 6, 7 are respectively There is a microstrip transmission line 4 for signal input and a microstrip transmission line 5 for signal output, the connection line between the center of the substrate integrated waveguide circular cavity 6 and the center of the input port, and the substrate integrated waveguide circular cavity 6 The angle α between the center and the center line of the coupling hole 8 is 60°-90°, and the line between the center of the other substrate integrated waveguide circular cavity 7 and the center of the output port is connected with the su...
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The invention discloses a non-coaxial substrate integrated waveguide circular cavity filter, comprising a dielectric substrate with double sides provided with metal chips, where the substrate is provided with two substrate integrated waveguide circular cavities, there is coupling hole arranged between the two cavities, the two cavities are provided with signal input microband transmission line and signal output microband transmission line, respectively, and a connection line between the centers of each cavity and its corresponding input (output) port makes an included angle of 60 deg.-90 deg. with that between the centers of it and the coupling hole. And the invention has advantages of balanced upper and lower side band performances, convenient to integrating with an active circuit, good selectivity, low cost, high accuracy, easy to make large-scale production, etc.
Description
technical field [0001] The invention relates to a microwave and millimeter wave filter, in particular to a non-coaxial substrate integrated waveguide circular cavity filter which can be used for microwave and millimeter wave circuit design. Background technique [0002] The filter is one of the important basic unit circuits of the circuit system, and its performance has an important impact on the overall selectivity, noise figure, gain, and sensitivity of the system. Commonly used in microwave and millimeter wave circuits are filters based on metal waveguides and filters based on planar circuits such as microstrip lines and coplanar lines. Filters based on metal waveguides usually have the advantages of high Q, low loss, and good selectivity, but they require extremely high processing precision, high cost, large volume, and are difficult to integrate with active circuits. Although filters based on planar circuit technologies such as microstrip lines and coplanar lines are e...
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IPC IPC(8): H01P1/207
Inventor 洪伟汤红军
Owner SOUTHEAST UNIV