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A millimeter wave bandpass filter

A band-pass filter and millimeter-wave technology, applied in waveguide devices, resonators, circuits, etc., can solve the problems of not meeting the application requirements of surface-mount packaging and large pass-band insertion loss, and achieve compact structure and pass-band Low insertion loss and high stop band rejection

Active Publication Date: 2022-04-29
WUHAN FINGU ELECTRONICS TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a millimeter-wave bandpass filter, which solves the problems existing in the prior art, such as the size or the insertion loss of the passband is relatively large, and the application requirements of the surface-mount package cannot be met.

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  • A millimeter wave bandpass filter
  • A millimeter wave bandpass filter
  • A millimeter wave bandpass filter

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Embodiment approach

[0040] Please refer to Figure 5 , Figure 6 As shown, another embodiment of the present invention: the first metal layer 11', the first dielectric layer 12' and the second metal layer 13' of the substrate resonator 10' are provided with a first resonator surrounded by metallized through holes device (16') and the sixth resonator (17'), the first resonator 16' and the sixth resonator 17' are provided with an input port 131' and an output port 132', and the LTCC dielectric resonator 20' is placed Above the substrate resonator 10', the third metal layer 21', the second dielectric layer 22' and the fourth metal layer 23' are provided with a second resonator 26' surrounded by metallized through holes, a third A resonator 27', a fourth resonator 28' and a fifth resonator 29'. Wherein, the inductive coupling windows provided on the second metal layer 13' are the first inductive coupling window (not marked) and the seventh inductive coupling window (not marked), and the inductive c...

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Abstract

The invention discloses a millimeter wave bandpass filter, which comprises five metal layers, three dielectric layers and seven inductive coupling windows. Wherein, the first metal layer, the first dielectric layer and the second metal layer are printed circuit board circuits, which constitute the first resonator, the sixth resonator and the input and output ports. The third metal layer, the second dielectric layer, the fourth metal layer, the third dielectric layer, and the fifth metal layer are multi-layer LTCC circuits, forming the second to fifth resonators. The first resonator and the second resonator and the fifth resonator and the sixth resonator are coupled and connected through an inductive coupling window to form a package structure of a surface mount filter. The designed millimeter-wave bandpass filter has high selectivity with low insertion loss in the passband and high rejection in the stopband, which meets the application requirements of surface-mount packaging for 5G millimeter-wave filters.

Description

technical field [0001] The invention relates to microwave device technology, in particular to a millimeter wave bandpass filter. Background technique [0002] The 5G millimeter-wave bandpass filter is the core device in the 5G millimeter-wave communication system. It has the characteristics of wide use and large usage, and plays a key role in the performance and size of the system. 5G millimeter-wave bandpass filters can be designed using transmission lines such as microstrip lines, metal waveguides, and substrate-integrated waveguides. The use of miniaturized microstrip line resonators is beneficial to reduce the size of the filter, but the quality factor of the microstrip line resonators is low. The metal waveguide with high quality factor and the substrate integrated waveguide resonator are used to reduce the passband insertion loss of the filter, but the size is relatively large. At present, the existing 5G millimeter-wave bandpass filters have shortcomings such as lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/20H01P7/00
CPCH01P1/20H01P7/00
Inventor 李群许露钰朱晖王文珠杨涛
Owner WUHAN FINGU ELECTRONICS TECH