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A miniaturized cavity filter, multiplexer and combiner

A cavity filter and cavity technology, which is applied to waveguide devices, circuits, resonators, etc., can solve the problems of cavity filter volume increase, achieve high Q value, low resonance frequency, and reduce weight

Active Publication Date: 2017-07-04
CHENGDU LIANBANG MICROWAVE COMM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem in the prior art that the volume of the cavity filter must be increased in order to obtain higher capacitance and lower frequency, the present invention provides a layered body with a lateral opening at the open end of the resonant rod A miniaturized cavity filter with a sheet structure embedded in a layered structure is arranged on the side wall of the structure and the containing cavity

Method used

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  • A miniaturized cavity filter, multiplexer and combiner
  • A miniaturized cavity filter, multiplexer and combiner
  • A miniaturized cavity filter, multiplexer and combiner

Examples

Experimental program
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Embodiment 1

[0044] In this embodiment, the resonant frequency of the filter is described with the layer structure 11 consisting of two layers of layers, and the sheet structure 72 consisting of only one layer of sheet-like protrusions.

[0045] set up figure 2 with image 3 The inner cavity size (length*width*height) of the cavity 2 is 8mm*8mm*6mm; the overall height of the resonant rod 1 is set to 5.7mm, and the thickness of each layer of the resonant rod 1 is set to 0.5mm. The length is set to 7.2mm, the width is set to 7mm, and the interlayer spacing between layers is 1.1mm; the thickness of the sheet-like protrusions is set to 0.5mm, the length is set to 7.2mm, and the width is set to 7mm. The distance between the lower surface and the inner bottom surface of the cavity 2 is set to 4.4 mm, and the distance between the sheet-shaped protrusion and the layered body of the resonant rod 1 is set to 0.3 mm; The diameter of the through hole is

[0046] According to the resonator freque...

Embodiment 2

[0050] In this embodiment, the layered body structure is composed of three layers of layered bodies, and the sheet-shaped body structure is composed of two layers of sheet-shaped protrusions to illustrate the resonant frequency of the filter.

[0051] set up Figure 4 The inner cavity size (length*width*height) of the cavity 2 is 8mm*8mm*6mm; the overall height of the resonant rod 1 is set to 5.7mm, and the thickness of each layer of the resonant rod 3 is set to 0.5mm, The length is set to 7.3mm, the width is set to 6.5mm, and the interlayer spacing between layers is 1.1mm; the thickness of the sheet-like protrusions is set to 0.5mm, the length is set to 7.3mm, and the width is set to 6.5mm The distance between layers is 1.1mm, the distance between the lower surface of the first layer of the sheet-like protrusion and the inner bottom of the cavity is 3.1mm, and the distance between the lower surface of the second layer of the sheet-like protrusion and the inner bottom of the c...

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Abstract

The invention discloses a miniaturized cavity filter, a multiplexer and a combiner. The miniaturized cavity filter comprises a resonance pole and a containing cavity composed of a cavity body and a cover plate, wherein the cover plate is arranged on one side face of the cavity body, the resonance pole is installed on the bottom face of the cavity body, the open circuit end of the resonance pole is provided with a layered structure with an open side, the side wall of the containing cavity is provided with a platy structure embedded into the layered structure, and a gap is formed between the layered structure and the platy structure. Because the open-circuit end of the resonance pole is provided with the layered structure with the open side and the side wall of the containing cavity is provided with the platy structure embedded into the layered structure, the effective overlap area between the layered structure and the platy structure is at least two times of the total overlap area of a ring body on a resonance pole and a ring body on a cover plate in the prior art.

Description

technical field [0001] The invention relates to the field of microwave communication, in particular to a miniaturized cavity filter, multiplexer and combiner. Background technique [0002] At present, with the rapid development of microwave communication technology, high integration and miniaturization have become the development trend in the field of microwave communication. As a transceiver filter at the front end of radio frequency communication equipment, its size and weight directly and highly affect the miniaturization of communication equipment. [0003] According to the resonator frequency formula: It can be seen that when the resonant frequency f needs to be lowered, the inductive reactance L or the capacitive reactance C needs to be increased. From the capacitance formula: C=(ε*S) / (4π*k*d), it can be seen that when the distance d between the capacitor plates is fixed, the capacitive reactance C increases with the increase of the facing area S between the capacit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/207H01P1/213
CPCH01P7/04
Inventor 林安正
Owner CHENGDU LIANBANG MICROWAVE COMM ENG