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Dual-mode double-ridge dielectric filled filter

A medium filling and filter technology, which is applied to waveguide-type devices, circuits, electrical components, etc., can solve the problems of filter processing and tuning difficulties, and the filter structure cannot maintain a linear structure, so as to achieve miniaturization and selectivity. The effect of height and volume reduction

Active Publication Date: 2022-06-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using a single-mode resonator to introduce a transmission zero point, it is inevitable to obtain negative coupling, and then cross-coupling needs to be introduced. At this time, the filter structure cannot maintain a linear structure, which brings certain difficulties to the processing and tuning of the filter.

Method used

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  • Dual-mode double-ridge dielectric filled filter
  • Dual-mode double-ridge dielectric filled filter
  • Dual-mode double-ridge dielectric filled filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1 and figure 2 As shown in the figure, this embodiment provides a dual-mode dual-ridge dielectric-filled filter with asymmetric response, which is a rectangular dielectric block D1 plated with silver on the surface. The top of the dielectric block D1 is connected to the coaxial connectors S1 and S2, and the coaxial connection The filter acts as an input and output port to feed the filter, and the embedded depth of its coaxial inner conductor determines the coupling strength of the input and output ports. Dielectric block D1 is formed with two dual-mode dual-ridge resonators, each of which provides two transmission poles and one transmission zero; where the TE of the dual-mode dual-ridge resonator on the left in the figure 102 Die and TE 201 The resonant frequency of the mode is controlled by the length of the ridge L2 and the length of the ridge L1, respectively, and the ridge L2 and the ridge L1 are loaded orthogonally on the adjacent two sides of the dua...

Embodiment 2

[0028] see Figure 4 As shown, this embodiment provides another dual-mode dual-ridge dielectric filling filter with asymmetric response. Different from Embodiment 1, blind holes are not introduced in this embodiment. Therefore, the TE of the two dual-mode dual-ridge resonators 102 Die and TE 201 The resonant frequency of the mode is controlled only by the length of the ridge.

[0029] Figure 5 The S-parameter curve of the above-mentioned dual-mode dual-ridge dielectric filling filter of this embodiment is shown. It can be seen from the figure that this embodiment can obtain asymmetrical response complementary to that of Embodiment 1, and the two transmission zeros are on the right side of the passband. side.

Embodiment 3

[0031] see Image 6 and Figure 7 As shown, this embodiment provides a dual-mode dual-ridge dielectric filling filter with symmetrical response. Different from Embodiment 1 and Embodiment 2, among the two dual-mode dual-ridge resonators in this embodiment, one dual-mode dual-ridge resonator does not introduce a blind hole, and the other dual-mode dual-ridge resonator introduces a blind hole. hole. Therefore, the TE of the dual-mode dual-ridge resonator without blind holes 102 Die and TE 201 The resonant frequency of the mode is still controlled by the length of the ridge; while the dual-mode dual-ridge resonator introduced into the blind hole, its TE 102 In addition to being controlled by the length of the ridge, the resonant frequency of the mode can also be controlled by the height of the blind hole, but its TE 201 The resonant frequency of the mode can still only be controlled by the length of the ridge.

[0032] Figure 8 The S-parameter curve of the above-mentioned...

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Abstract

The invention discloses a dual-mode double-ridge dielectric filled filter which is a dielectric block with a conductive coating on the surface, two dual-mode double-ridge resonators are formed on the dielectric block, and double ridges of the dual-mode double-ridge resonators are orthogonally loaded on two adjacent sides of the dual-mode double-ridge resonators and used for adjusting resonant frequencies of a TE102 mode and a TE201 mode. Each dual-mode double-ridge resonator provides two transmission poles and a transmission zero point, the two dual-mode double-ridge resonators are coupled through the coupling diaphragm, and the coupling diaphragm longitudinally moves on the cross section of the dielectric block and is used for controlling cross coupling between the two dual-mode double-ridge resonators. And the size of the window of the coupling diaphragm is used for controlling the direct coupling between the two dual-mode double-ridge resonators. The filter can be applied to a 5G frequency band, and has the advantages of strong out-of-band selectivity, small in-band insertion loss, small size, fast selective roll-off of a passband edge and the like.

Description

technical field [0001] The invention relates to the technical field of radio frequency and microwave filters, in particular to a dual-mode dual-ridge dielectric filling filter. Background technique [0002] With the rapid development of wireless communication systems, the performance requirements of radio frequency devices are also getting higher and higher. For RF frequency selective components, the design of elliptical and quasi-elliptical filters becomes more and more important under the condition of limited spectrum resources. Among them, due to the superior performance of dielectric resonator filters, such as low cost, miniaturization, and low insertion loss, they have been widely studied by scholars and applied in wireless systems. [0003] Traditional dielectric filters are generally partially filled, also known as dielectric loaded metal cavity filters. The characteristic of these filters is that they contain a metal outer cavity and a dielectric block placed insid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20
CPCH01P1/2002
Inventor 谢雅陈付昌
Owner SOUTH CHINA UNIV OF TECH
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