Stacked cascaded two cavity substrate integrated waveguide dual mode bandpass filter

A substrate-integrated waveguide and band-pass filter technology, applied in the microwave field, can solve problems such as loss of advantages, large plane size, technical difficulty, etc., and achieve the effects of superior performance, small size, and easy processing.

Inactive Publication Date: 2015-06-24
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

There are two ways to cascade the substrate integrated waveguide dual-mode filter. One is to place two resonant cavities on the same plane. This method is relatively simple in technology, but the disadvantage is that the plane size is too large and the original size advantage
The other is stacking up and down. This method has obvious advantages in size, but it is technically difficult, and there is currently no available technical solution to realize it.

Method used

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  • Stacked cascaded two cavity substrate integrated waveguide dual mode bandpass filter
  • Stacked cascaded two cavity substrate integrated waveguide dual mode bandpass filter

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Embodiment example 1

[0014] Control attached figure 1 , the center frequency of the filter is designed at 2.5GHz, the relative bandwidth of the passband is 6.4%, the material of the dielectric plate used is Rogers R03010, the relative dielectric constant is 10.2, and the thickness of the 6 layers of dielectric is the same, all of which are 1.5 mm. The side length of the square resonant cavity is 49mm, the metal via hole used as a perturbation probe is located on the diagonal of the cavity, the distance from the edge of the cavity is 8mm, and the diameter is 1.0mm, the diameter of the metal via hole used as a coupling probe is 1.5mm, the distance from the edge of the cavity is 13.5mm, the width of the microstrip line is 5.5mm, and the width of the stripline is 3.2mm.

[0015] Control attached figure 2 , which shows the performance parameter curve of the implementation case 1. It can be seen from the figure that the passband of the filter is 2.41GHz to 2.57GHz, the in-band insertion loss is less ...

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Abstract

A stacked cascaded two cavity substrate integrated waveguide dual mode bandpass filter comprises two substrate integrated waveguide resonant cavities arranged up and down through stacked cascaded, a belt-type line connecting the two resonant cavities, a microstrip line serving as input and output of the filter and a coupling probe. The filter has the advantages that size is small, manufacture and machining are facilitated, performances are excellent, and the requirements on a radio frequency filter by a modern wireless communication system are met.

Description

technical field [0001] The invention relates to the field of microwave technology, and belongs to a passive element widely used in microwave circuits. Layer-cascaded two-cavity substrate-integrated waveguide dual-mode bandpass filter Background technique [0002] A filter is a passive component widely used in microwave and radio frequency circuits, and its index directly affects the performance of the entire system. Modern communication systems have higher and higher requirements for the miniaturization of microwave and radio frequency filters. Substrate Integrated waveguide (SIW) filters have been favored in recent years due to their superior performance and the advantages of small size and easy integration. Wide attention of researchers at home and abroad. The dual-mode filter has a very obvious advantage in size due to the dual-purpose cavity. The design of the dual-mode filter by using the substrate integrated waveguide can be said to combine the advantages of both. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/208H01P1/203
Inventor 程崇虎王铭何波
Owner NANJING UNIV OF POSTS & TELECOMM
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