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Takao HASEGAWA Seiichi BANBA Hiroyo OGAWA Tsuneo TOKUMITSU
This paper describes multi-branch Wilkinson power dividers using multilayer MMIC technology. Circuit configuration is simplified and the circuit area is effectively minimized using thin film microstrip lines. An impedance transformer between the input port and the divided point is introduced to complete impedance matching and reduce insertion loss in multi-branch power dividers. Size-reduced planar-type 2-, 4-, and 8-branch Wilkinson power dividers are produced and performed well.
Seiichi BANBA Takao HASEGAWA Hiroyo OGAWA Tsuneo TOKUMITSU
Novel transmission line structures for multilayer MMICs, which are constructed with thin dielectric layers on a GaAs wafer surface, are theoretically and experimentally investigated. Five thin film transmission line structures are discussed in this paper: (1) Microstrip lines, (2) Inverted microstrip lines, (3) Triplate lines, (4) Trapezoidal microstrip lines and (5) Valley microstrip lines. These transmission line structures are fabricated using thin polyimide films and chemical etching.