| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-performance waveguide group branching filter which can be reduced easily in size and cost. SOLUTION: The constituting circuit of this waveguide group branching filter composed of a circular/square waveguide multistage transformer 1, a branch waveguide type polarization coupler 4, a square waveguide multistage transformer 9, a square waveguide H-plane T branch circuit 10, and waveguide band-pass filters 8, 14, and 18, is formed by carrying two metallic blocks from their surfaces and inputs radio waves V1 and H1 having planes of polarization which are respectively perpendicular and parallel to the branching plane of the polarization coupler 4 in a certain frequency band f1. A radio wave V2 having the same plane of polarization as the wave V1 has in frequency band f2 higher than the band f1 through an input terminals P1 and outputs the radio waves V1, H1, and V2 from output terminals P2, P3, and P4, respectively.
|
