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Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter

A band-stop filter and microstrip technology, which is applied in the field of filters, can solve the problems of large vertical length and achieve the effect of reducing the vertical length and realizing portability and miniaturization

Inactive Publication Date: 2017-03-22
HENAN NORMAL UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a kind of broadband band-stop filter based on the curved 1-D PBG microstrip to solve the problem of excessive longitudinal length of the 1-D PBG microstrip structure in the prior art. A curved design is performed to form a curved PBG microstrip, which obviously can greatly reduce the longitudinal dimension

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  • Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter
  • Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter
  • Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter

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Embodiment Construction

[0012] The specific content of the present invention is described in detail with reference to the accompanying drawings.

[0013] Generally speaking, the characteristics of the PBG structure are mainly determined by the following factors: the number of periodic units, the geometric structure of the periodic units, the arrangement of the periodic units, and the dielectric constant of the medium. Generally, the thickness and relative dielectric constant of the PBG structure dielectric substrate are selected, so that the parameters that determine the characteristics of the PBG structure are only the size of the holes, the distance between the holes, and the number of periodic units. Center frequency of stop band f 0 Is a function of the period d of the PBG structure, and the specific relationship is as follows:

[0014]

[0015] Where f 0 Is the stop band center frequency; c is the speed of light in vacuum; d is the distance between periodic structures; ε e Is the effective dielectric...

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Abstract

The present invention discloses a bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter. The bent 1-D PBG microstrip-based broadband band-stop filter comprises a dielectric substrate and metal printed on the dielectric substrate; three transversely-etched square holes are formed in the dielectric substrate; two longitudinally-etched square holes located just below the third transversely-etched square hole are formed in the dielectric substrate; the sizes of the five square holes are identical; and intervals between adjacent square holes are equal. According to the bent 1-D PBG microstrip-based broadband band-stop filter, improvements are made based on an original 1-D type PBG microstrip-based broadband band-stop filter, and therefore, the longitudinal length of the bent 1-D PBG microstrip-based broadband band-stop filter can be greatly reduced under a condition the wide stop-band feature of the bent 1-D PBG microstrip-based broadband band-stop filter is ensured, and the portability and miniaturization of the microstrip broadband band-stop filter are realized.

Description

Technical field [0001] The invention belongs to the technical field of filters, and in particular relates to a wideband band rejection filter based on a curved 1-D PBG microstrip. Background technique [0002] In recent years, with the rapid development of microwave integrated circuit (MIC) technology, microstrip circuits have attracted much attention due to their small size, light weight, simple structure, convenient processing and low cost. Microstrip filters with full-planar structure are also widely used in MIC. For narrowband filters, people often use various resonators to achieve, but the bandwidth usually obtained is generally very narrow, it is difficult to apply in broadband, and the design is more complicated, so for broadband band stop filters, photonics are usually used Band gap (PBG) structure to achieve. [0003] The PBG structure has a periodic structure with band-stop characteristics. Electromagnetic signals located in the frequency band gap will not be able to tr...

Claims

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Application Information

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IPC IPC(8): H01P1/203
CPCH01P1/203
Inventor 詹华伟史水娥李雪萍刘伟娜李小青詹海潮
Owner HENAN NORMAL UNIV