| 摘要 |
A waveguide group branching filter, having a constitutional circuit comprisi ng a circular-square waveguide multistage transformer 1, a branch waveguide polarization branching filter (4), a square waveguide multistage transformer (9), a square waveguide H plane T branch circuit (10), and waveguide band pa ss filters (8, 14, 18) and formed by digging two metal blocks from the surfaces . Radio waves V1, H1 having planes of polarization, respectively, vertical to and horizontal with the branch plane of the branch waveguide polarization branching filter (4) in some frequency band f1 and a radio wave V2 having th e same plane of polarization as the radio wave V1 in frequency band f2 higher than frequency band f1 enter an input end P1. The radio waves V1, H1 and V2 are outputted, from output ends P2, P3 and P4, respectively.
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