Asymmetric SIR loaded wide stop band suppression broadband band-pass filter

A band-pass filter and wide stop-band technology, applied in the field of microwave devices, can solve the problems of high insertion loss, large size, complex structure, etc., and achieve the effects of high selectivity, high suppression level, and simple implementation process.

Active Publication Date: 2020-01-24
10TH RES INST OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Complex structure, large size, high insertion loss

Method used

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  • Asymmetric SIR loaded wide stop band suppression broadband band-pass filter
  • Asymmetric SIR loaded wide stop band suppression broadband band-pass filter
  • Asymmetric SIR loaded wide stop band suppression broadband band-pass filter

Examples

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Embodiment Construction

[0021] combine figure 1 with figure 2 , in the preferred embodiment described below, a kind of asymmetrical SIR loaded wide stopband suppression broadband bandpass filter, comprises: dielectric substrate 1, the metal ground plate 2 that is fixed below the bottom plane of dielectric substrate 1, and is located in the dielectric The multimode filter circuit above the substrate 1 is characterized in that: the multimode filter input port P in Connect to the first interdigital feed structure through a 50-ohm microstrip line, load the stepped impedance resonator SIR on the lower left side of the multimode resonator, and the SIR loading direction is parallel to the symmetry axis T-T of the multimode resonator * , the second interdigital feed structure passes through the 6th microstrip line and P out The ports are connected, and the first interdigital feed junction and the second interdigital feed structure are about T-T * Axis mirror symmetry, two about T-T * The axisymmetric in...

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Abstract

The invention discloses an asymmetric SIR loaded wide stop band rejection broadband band-pass filter. The broadband band-pass filter has high / far out-of-band rejection performance. The filter is realized through the following technical schemes that: a multimode filter input port Pin is connected with a first interdigital feed structure through a 50-ohm microstrip line; a stepped impedance resonator SIR is loaded at the lower left side of a multimode resonator; the multimode resonator is composed of an inverted pi resonator, a T-shaped stub loaded at the upper side of the center of the invertedpi resonator and an open-circuit stub loaded at the lower side of the center of the inverted pi resonator; a second interdigital feed structure is connected with a Pout port through a sixth microstrip line; the first interdigital feed junction and the second interdigital feed structure are in mirror symmetry relative to a T-T*axis; signals inputted from the input port Pin couple energy to the multimode resonator through the first interdigital feed structure; and the energy is coupled to the output port Pout through the second interdigital feed structure.

Description

technical field [0001] The invention relates to a microwave device applied in the technical field of wireless communication, more precisely, relates to an asymmetrical SIR (stepped impedance resonator) loaded wide-stop-band suppressing wide-band band-pass filter. Background technique [0002] With the emergence of emerging broadband services such as big data, artificial intelligence, and virtual reality, traditional narrowband communication systems cannot meet the actual needs of these application scenarios. Therefore, modern wireless communication technology requires the communication system to have a great improvement in transmission capacity and transmission rate. As an indispensable part of broadband wireless communication system, the importance of broadband filter is self-evident, and high-performance broadband filter is one of the hotspots of current engineering applications and academic research. [0003] In broadband wireless communication systems, high-performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/203
CPCH01P1/2002H01P1/203H01P1/2039
Inventor 熊阳裴乃昌何毅龙朱海帆
Owner 10TH RES INST OF CETC
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