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Bandwidth-reconfigurable wideband bandpass filter based on cross-shaped resonator

A bandpass filter and resonator technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problem of small bandwidth adjustment range, and achieve the effect of small size, good performance, and easy processing

Active Publication Date: 2018-02-23
UNIVERSITY OF MACAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current reconfigurable bandpass filters have a small bandwidth adjustment range, and the bandwidth adjustment capability can only achieve a maximum bandwidth of no more than 15%, which is obviously far from meeting the needs of modern broadband communication systems. Therefore, reconfigurable broadband The development of filters is extremely rare at home and abroad

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  • Bandwidth-reconfigurable wideband bandpass filter based on cross-shaped resonator
  • Bandwidth-reconfigurable wideband bandpass filter based on cross-shaped resonator
  • Bandwidth-reconfigurable wideband bandpass filter based on cross-shaped resonator

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] Such as figure 1 , figure 2 As shown, the broadband bandpass filter with reconfigurable bandwidth of the cross-shaped resonator disclosed in the present invention includes the microstrip line structure and active circuit of the upper layer, the dielectric substrate of the middle layer, the ground metal of the lower layer and the metallized hole, and the metal Vias connect the microstrip line structure to the ground metal. The upper microstrip line structure includes an input / output port, a cross-shaped resonator, two open stubs of the resonator, a parallel coupled line structure, and four open stubs connected to the PIN diode switch to the resonator.

[0032] The four microstrip lines of the cross resonator are the first microstrip line 1, the second mic...

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Abstract

The invention discloses a bandwidth-reconfigurable wideband bandpass filter based on a cross-shaped resonator. According to the wideband bandpass filter, input and output ports are coupled with two microstrip lines of the cross-shaped resonator respectively, another two microstrip lines of the cross-shaped resonator are connected with open-circuit stubs by means of PIN diode switches, the number of the PIN diode switches is four, and the number of the open-circuit stubs is four. The wideband bandpass filter can control the on and off of the two groups of PIN diode switches, and change characteristic impedance of the accessed open-circuit stubs, thereby controlling the bandwidth of the filter, and realizing the switching among four bandwidths.

Description

technical field [0001] The invention relates to the field of microwave communication, in particular to a wideband bandpass filter with reconfigurable bandwidth based on a cross-shaped resonator. Background technique [0002] With the development of modern wireless communication technology, more and more RF front-ends need to work at different center frequencies and bandwidths, which requires reconfigurable RF front-ends with center frequency and bandwidth adjustment capabilities. Reconfigurable filters are an important part of it. In a large number of literatures in the past, the adjustable center frequency has been extensively studied. Relatively speaking, few achievements have been made in the adjustable bandwidth, especially when it is applied to wideband bandpass filters. Most of the current reconfigurable bandpass filters have a small bandwidth adjustment range, and the bandwidth adjustment capability can only achieve a maximum bandwidth of no more than 15%, which is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
CPCH01P1/20381
Inventor 谭锦荣滕程
Owner UNIVERSITY OF MACAU