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Analysis and design of a circular disc 3 dB coupler

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2 Author(s)
Bialkowski, M.E. ; Dept. of Electr. & Comput. Eng., Queensland Univ., St. Lucia, Qld., Australia ; Jellett, S.T.

A 3 dB quadrature hybrid in the form of a 4-port microstrip circular disc, is investigated experimentally and theoretically. The hybrid consists of additional reactive stubs and impedance steps to achieve greater operational bandwidth. A relative bandwidth of over 20% is easily obtained for this device

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:42 ,  Issue: 8 )