A UWB Filter Based on a Novel Defective Microstrip Structure
A technology of ultra-broadband filter and defective microstrip, which is applied in the direction of waveguide devices, circuits, electrical components, etc., can solve the problems of poor selectivity, large insertion loss, low insertion loss return loss, etc., and achieve simple and reliable structure, The effect of convenient processing and low cost
Active Publication Date: 2019-04-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0005] The purpose of the present invention is to provide an ultra-wideband filter based on a new type of defect microstrip structure for the defects of the existing ultra-wideband filter, such as large size, poor selectivity, and large interpolation loss; the ultra-wideband filter is based on the improved new defect Composed of microstrip structure resonators, it has the advantages of wide operating bandwidth, extremely low insertion loss, good return loss and good selectivity.
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[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0032] In this embodiment, an ultra-wideband filter based on a novel defect microstrip structure is provided, and its structure is as follows Figure 4 As shown, the processed objects are as Figure 6 As shown; the filter is realized on the dielectric substrate of RT / Duroid 5880, the relative dielectric constant of the substrate is 2.2, the loss tangent is 0.0009, and the thickness is 0.787mm. In this embodiment, for the T-shaped defect microstrip structure, it is realized by opening defect slots in the microstrip layer of the input and output ports of the filter; The defect ground structure is realized; for the "mountain" type resonator, the microstrip line introduced on both sides of the defect microstrip resonator is used; for the defect microstrip resonator, two open groove defect structures are set on the microstrip line, At the same ti...
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The invention belongs to the field of microwave filters, and provides an ultra-wideband filter based on a novel defect microstrip structure, including a T-shaped defect microstrip structure, a complementary split ring structure, a "mountain"-shaped resonator and a defect microstrip resonator, The ultra-wideband filter is axisymmetric along the central axis in the vertical direction. The T-shaped defect microstrip structure is arranged on the microstrip layer of the input and output ends of the filter, and the complementary split ring structure is arranged on the ground layer of the filter input and output ends of the filter. ; The "mountain" resonator is arranged on the upper and lower sides of the defect microstrip resonator, and is introduced through parallel coupling; the defect microstrip resonator is composed of two open slot defect structures and an interdigitated coupling line, and the two openings The groove defect structure is arranged symmetrically on the upper and lower sides of the interdigitated coupling line. The ultra-wideband filter of the present invention is formed based on an improved novel defect microstrip structure resonator, and has the advantages of wide operating bandwidth, extremely low insertion loss, good return loss, good selectivity, and the like.
Description
technical field [0001] The invention belongs to the field of microwave filters, and specifically provides a high-selectivity ultra-wideband bandpass filter based on a novel defect microstrip structure to realize a wideband filtering function. technical background [0002] Ultra-wideband (UWB) technology has become a research hotspot in the field of wireless communication because of its simple system structure, low cost, low power consumption, high security, low interference, and high data transmission rate. Since the U.S. Federal Communications Commission (FCC) released the "First Report and Order" on ultra-wideband technology in February 2002, allowing the commercial application of ultra-wideband technology, the 3.1GHz to 10.6GHz frequency band has been opened to civilian systems free of charge. Broadband technology, especially ultra-wideband wireless communication has begun to receive widespread attention, and ultra-wideband wireless communication systems have developed ra...
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IPC IPC(8): H01P1/203H01P1/212
CPCH01P1/20309H01P1/212
Inventor 刘宇倪明环周鹏夏鑫淋杨涛杨自强
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA