Compact type UWB dual-band trap balancing band-pass filter
A filter and ultra-wideband technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve the problems of complex internal circuit structure, poor common-mode rejection characteristics, and cumbersome common-mode response design, achieving low cost and convenience. Processed, compact effect
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[0031] specific implementation plan
[0032] Below in conjunction with accompanying drawing, the implementation of technical scheme is described in further detail:
[0033] Both the output port and the input port of the balanced filter of the present invention are welded with SMA heads, so as to be connected to test or to be connected with other circuits.
[0034] The present invention uses the RT / Duriod5880 board with a relative dielectric constant of 2.2, a thickness of 0.508mm, and a loss factor of 0.0009 as the substrate, and a PCB of other specifications may also be used as the substrate. Such as figure 1As shown, the upper and lower surfaces of the dielectric substrate E3 of the PCB are covered with an upper metal layer E1 and a lower metal layer E2 respectively. The upper microstrip line structure of the balanced filter of the present invention is the upper metal layer E1, and the slot line structure is formed by etching on the lower layer metal E2.
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