A Microstrip Dual-mode Bandpass Filter with Square Resonant Ring
A resonant ring and filter technology, applied in waveguide-type devices, circuits, electrical components, etc., can solve the problems of weak stop-band suppression and large filter size, and achieve high-order harmonic suppression, low insertion loss, increased The effect of capacitors
Active Publication Date: 2017-03-15
TIANJIN BINHAI ZHONGGUAN RUBBER HOSE
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However, the size of the filter is relatively large, and the rejection of the stop band is weak
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[0019] Below in conjunction with accompanying drawing, the present invention will be further described through embodiment.
[0020] see figure 1 , a preferred embodiment is a square ring microstrip dual-mode bandpass filter with a center frequency of 0.62GHz. The medium material of the present invention adopts Taconic RF-60, and its dielectric constant is ε r =6.15, thickness H=0.64 mm. Such as figure 1 As shown, the square annular microstrip dual-mode bandpass filter includes input feeder 1, output feeder 2, square ring 3, four loaded microstrip lines 4, 5, 6 and 7, four square microstrip lines 8, 9 , 10 and 11, and perturbation sheet 12. The input feeder 1 is a "T" feeder structure, including a main feeder 13 and parallel branches 14, and the main feeder 13 and the parallel branches 14 are perpendicular to each other. The width W1 of the main feeder 13 is 0.93 mm, and the width W2 of the parallel branches 14 is 14 mm. The output feeder 1 and the input feeder 2 have the...
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The invention discloses a microstrip dual-mode band pass filter of a square resonance ring, and is applied to such fields as a wireless communication system and the like. The filter comprises an input feed line, an output feed line, a perturbation sheet and the square resonance ring. The square resonance ring is composed of a closed-loop square microstrip line and four loading microstrip lines disposed at four corners outside the closed-loop square microstrip line. The four loading microstrip lines at the four corners employ arrowhead-shaped structures, and two edges of each arrowhead are vertical to each other. The centers of four edges of the closed-loop square microstrip line are each provided with an opening, the openings are connected with four arms in the internal direction of the square ring, and each arm is composed of an opening triangular ring and two short microstrip lines. The perturbation sheet is disposed at one corner of a square annular resonator, and the perturbation sheet is a square microstrip line. The input feed line and the output feed line are the same in terms of structure and dimension, form 90 degrees with each other, and are of T-shaped feed line structures. The filter provided by the invention has the advantages of low insertion loss, narrow passband, high stop band inhibition, small dimension and the like.
Description
technical field [0001] The invention relates to a square resonant ring microstrip dual-mode band-pass filter, in particular to a band-pass filter with the characteristics of suppressing high-order spurious pass bands and miniaturization, which can be used in fields such as wireless communication systems. Background technique [0002] Filters with microstrip structure have been widely used in wireless communication systems because of their advantages of easy design and integration. There are various types and realization forms of microstrip filters, and the research of miniaturized high-performance microstrip filters has always been a hot field. Dual-mode filters have the advantages of miniaturization, low loss and easy generation of transmission zeros, and are widely used in wireless communication systems. The dual-mode resonator has a pair of degenerate modes, and the introduction of perturbation on the symmetry plane of the resonator separates the pair of degenerate modes...
Claims
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IPC IPC(8): H01P1/203
Inventor 刘新月郑宏兴冯立营
Owner TIANJIN BINHAI ZHONGGUAN RUBBER HOSE