Broadband Bandpass Filter with Wide Stopband Rejection for Asymmetric Sir Loading

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

Active Publication Date: 2021-02-09
10TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Broadband Bandpass Filter with Wide Stopband Rejection for Asymmetric Sir Loading
  • Broadband Bandpass Filter with Wide Stopband Rejection for Asymmetric Sir Loading
  • Broadband Bandpass Filter with Wide Stopband Rejection for Asymmetric Sir Loading

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Embodiment Construction

[0021] combine figure 1 and 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 inv...

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Abstract

The invention discloses an asymmetrical SIR-loaded wide-band stop-band suppression wide-band band-pass filter, aiming to provide a wide-band band-pass filter with high / far out-of-band suppression. The present invention is realized through the following technical solutions: multimode filter input port P in The 50-ohm microstrip line is connected to the first interdigital feed structure, and the stepped impedance resonator SIR is loaded on the lower left side of the multimode resonator, wherein the multimode resonator is loaded by the inverted π resonator and its central upper side The T-shaped stub and the open-circuit stub loaded on the lower side are composed; the second interdigital feed structure is connected to the P through the 6th microstrip line out The ports are connected, and the first interdigital feed junction and the second interdigital feed structure are about T‑T * Axial mirror symmetry; from input port P in The input signal couples energy to the multimode resonator through the first interdigital feed structure, and then couples the energy to the output port P through the second interdigital feed structure out .

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 Patents(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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