A Circular Substrate Integrated Waveguide Bandpass Filter
A substrate-integrated waveguide and band-pass filter technology, which is applied to waveguide devices, circuits, electrical components, etc., can solve problems such as large structural size, and achieve the effects of easy adjustment, low power consumption, and easy adjustment
Active Publication Date: 2020-02-14
QUFU NORMAL UNIV
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However, SIW also has certain shortcomings. When the frequency is low, the structure size is relatively large.
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[0033] combine figure 1 , the substrate integrated waveguide bandpass filter of the present invention includes an upper layer metal patch 1, a dielectric substrate 3, and a lower layer metal patch 2; the middle part of the upper layer metal patch 1 is a circular patch 11, and the circular patch 11 is provided with a first metal through hole 111 in the center, and two second metal through holes 112 are respectively arranged on the upper and lower sides of the first metal through hole 111. The diameter of the first metal through hole 111 is larger than that of the second metal through hole 112. ; The left and right sides of the circular patch 11 transition to the first microstrip line 61 and the second microstrip line 62 respectively through the first coplanar waveguide 71 and the second coplanar waveguide 72, and the first microstrip line 61 is connected The input terminal 4 and the second microstrip line 62 are connected to the output terminal 5; the upper and lower sides of t...
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Abstract
The invention discloses a circular substrate integrated waveguide bandpass filter. The filter comprises an upper-layer metal patch, a dielectric substrate and a lower-layer metal patch; the middle ofthe upper-layer metal patch is a circular patch; a metal through hole is formed in the center of the circular patch; two metal through holes are formed in the upper side and lower side of the circularpatch respectively; the left side and right side of the circular patch are transitionally transformed into a first microstrip line and a second microstrip line respectively through a first coplanar waveguide and a second coplanar waveguide and are respectively connected with an input end and an output end; the upper side and lower side of the circular patch are respectively connected with rectangular patches; metal through holes are respectively formed along the circumference line of the circular patch and along the three side edges of each rectangular patch which are not connected with the circular patch; four sets of first rectangular grooves, second rectangular grooves and circular arc grooves are formed in the circular patch through etching; and the first rectangular grooves and the second rectangular grooves are distributed along the radial direction of the circular patch so as to evenly divide the circular patch into four parts. The filter of the invention has the advantages ofsmall size, light weight, ensured better out-of-band suppression performance, and good passband frequency selectivity.
Description
technical field [0001] The invention relates to the technical field of microwave filters, in particular to a circular substrate integrated waveguide bandpass filter. Background technique [0002] Deploying next-generation wireless systems for 5G applications requires a simple and efficient integration technique, necessitating the development of microwave and millimeter-wave components that are small in size, high in performance, and low in cost. As an important part of the wireless communication system, the filter has a large power capacity, a high quality factor, and low loss, and it is also developing in the direction of miniaturization, easy processing, and high integration. The traditional guided wave form cannot meet the above requirements at the same time, so it is very important to propose some new technologies that can achieve the above performance at the same time. Substrate integrated waveguide (SIW) technology (D. Deslandes, and K. Wu. Integrated microstrip and re...
Claims
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IPC IPC(8): H01P1/208
CPCH01P1/2088
Inventor 徐娟杨君赵建平张士顺许林青赵敏
Owner QUFU NORMAL UNIV