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Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station

A dielectric waveguide and filter technology, applied in the field of filters, to reduce the complexity of the manufacturing process, improve the overall performance, reduce the number of stages and zero points

Pending Publication Date: 2019-10-15
重庆思睿创瓷电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The harmonics of the coupling structure will have a great impact on the overall performance of the filter, which poses a great challenge to the design of the low-pass filter

Method used

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  • Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station
  • Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station
  • Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a dielectric waveguide filter for improving harmonic performance, the filter includes a plurality of dielectric bodies 1 combined, the surface of the dielectric body 1 is covered with a conductive layer, and the dielectric body 1 includes a plurality of resonant parts arranged in an array, The dielectric body 1 is provided with a coupling window 2, an input interface and an output interface. There is no conductive layer at the position of the coupling window 2. The input interface and the output interface are arranged on different resonant parts of the same dielectric body 1. The resonant part where the input interface is located and At least one isolating part is provided between the resonating parts where the output interface is located, and the isolating part makes the coupling bandwidth between the two resonating parts connected to it smaller than 10% of the working bandwidth of the dielectric waveguide filter using the dielectric body 1 . ...

Embodiment 2

[0045] The difference between this embodiment and Embodiment 1 is that in this embodiment, the coupling windows 2 are distributed symmetrically along the central axis of the dielectric body 1 .

Embodiment 3

[0047] Such as Figure 8 As shown, the difference between the present embodiment and the first embodiment is that the coupling window 2 for the main coupling or / and the coupling window 2 for the cross-coupling only includes one strip-shaped coupling window 2 located at the edge of the dielectric body 1 .

[0048] Specifically, in this embodiment, a strip-shaped coupling window 2 is used for the second coupling window. In other embodiments of the present application, the coupling window 2 for other main-way coupling or the coupling window 2 for cross-coupling may also use a bar-shaped coupling window 2 .

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Abstract

The invention relates to the technical field of filters, in particular to a dielectric waveguide filter for improving the harmonic performance, a radio frequency module and a base station. The dielectric waveguide filter includes dielectric bodies and at least two resonance parts located on the different dielectric bodies. The resonance parts are coupled together through coupling windows, and thecoupling windows are arranged at the edges of the dielectric bodies. The coupling windows are main-path-coupling coupling windows or cross-coupling coupling windows. The coupling windows are strip-shaped, L-shaped or U-shaped (opened rightwards), and are symmetrically distributed along the central axes of the dielectric bodies. By adopting the dielectric waveguide filter for improving the harmonicperformance, the radio frequency module and the base station provided by the invention, harmonics can be kept away from the pass band of the filter, the loss of the filter and the complexity of the manufacturing process can be reduced, and the cost can be lowered.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to a dielectric waveguide filter for improving harmonic performance, a radio frequency module and a base station. Background technique [0002] Compared with the traditional metal cavity waveguide filter, the dielectric waveguide filter has the advantages of small size, small insertion loss, high power withstand, and low cost, which can meet the filter requirements in the 5G communication system. [0003] In the dielectric waveguide filter, not only the cavity itself will generate higher mode harmonics, but the coupling structure will also generate resonance. Especially in broadband multilayer waveguide filters, the harmonics generated by the coupling structure are often closer to the passband of the filter than the high-order harmonics of the cavity itself. The harmonics of the coupling structure will have a great impact on the overall performance of the filter, which poses a grea...

Claims

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Application Information

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IPC IPC(8): H01P1/20
CPCH01P1/2002
Inventor 何进军蔡文新陈鹏韦俊杰
Owner 重庆思睿创瓷电科技有限公司
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