Bandwidth and stop band customizable substrate integrated coaxial line band elimination filter based on sliding symmetric structure
A technology of band-stop filter and symmetrical structure, which is applied in the direction of waveguide devices, circuits, electrical components, etc., can solve the problems of bulky, etc., and achieve the effects of easy integration, low high-frequency loss, and wide operating frequency band
Pending Publication Date: 2022-05-27
SOUTHEAST UNIV
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Problems solved by technology
Traditional bandstop filters are usually implemented with coaxial cables or waveguides, but are bulky to integrate
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Embodiment 1
[0031] see Figure 1-Figure 6 , this embodiment provides a customizable substrate-integrated coaxial band-stop filter based on a sliding symmetric structure for bandwidth and stop band, the band-stop filter includes a transition structure and a substrate-integrated coaxial line with a sliding symmetric structure line, the substrate-integrated coaxial line is further divided into a conversion transition part for impedance matching and a standard filtering part, wherein,
[0032] A transfer structure, which is used for connecting the microstrip line and the substrate integrated coaxial line with the sliding symmetrical structure;
[0033] A substrate-integrated coaxial line with a sliding-symmetrical structure includes a sliding-symmetrical structure and a substrate-integrated coaxial line. The substrate-integrated coaxial line from top to bottom sequentially includes: a top-grounded metal backplane, a dielectric substrate, and a metal inner conductor , a dielectric substrate a...
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The invention discloses a bandwidth and stop band customizable substrate integrated coaxial line band elimination filter based on a sliding symmetric structure, which comprises a switching structure and a substrate integrated coaxial line with the sliding symmetric structure, and is characterized in that the substrate integrated coaxial line structure is also divided into a conversion part for impedance matching and a standard filtering part. A radio frequency signal enters the filter from the micro-strip structure and is transmitted to the substrate integrated coaxial line with the sliding symmetric structure through the switching structure, and the band elimination filter with customized bandwidth and stop band is realized by designing and changing the geometric dimension of the substrate integrated coaxial line with the sliding symmetric structure. The filter is easy to design, simple in structure, low in cost, planar, easy to integrate with other devices, small in loss and high in application value in the microwave field.
Description
technical field [0001] The present invention relates to the technical field of band-stop filters, in particular to a bandwidth and stop-band customizable substrate-integrated coaxial line band-stop filter based on a sliding symmetrical structure. Background technique [0002] As one of the key devices in a wireless system, a band-stop filter can block signals in the frequency band and allow useful frequency components to pass. Traditional band-stop filters are usually implemented with coaxial lines or waveguides, but they are bulky to integrate. To overcome these limitations, substrate-integrated waveguides and substrate-set coaxial lines provide a new way to realize planar filters with excellent shielding performance. [0003] Sliding symmetry is a special kind of high symmetry that can be generated by translating and mirroring operations without breaking periodicity. In the past few years, microwave circuit and antenna design have been extensively studied due to its extr...
Claims
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IPC IPC(8): H01P1/202H01P1/203
CPCH01P1/202H01P1/203
Inventor 程强李欣崔铁军
Owner SOUTHEAST UNIV