Ultra-wideband microstrip filter
A microstrip filter and ultra-broadband technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problems of not designing ultra-broadband, and achieve low return loss and good harmonic suppression
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0021] Such as figure 2 and image 3 As shown, an ultra-wideband microstrip filter includes a first metal layer 1, a dielectric layer 2, and a second metal layer 3 stacked in sequence from top to bottom, and the metal pattern of the first metal layer 1 includes left and right mirror symmetry The left metal pattern and the right metal pattern are characterized in that, the left metal pattern or the right metal pattern respectively include sequentially connected input and output ports 11, a first step impedance short-circuit stub 12, a second step The impedance short-circuit stub 13 and the cross-toe coupling line section 14, the first step impedance short-circuit stub 12, the second step impedance short-circuit stub 13 and the cross-toe coupling line section 14 form a ring structure as a resonant unit of the filter, The cross-toe coupled line...
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