Novel quadrature branch-line coupler using CPW-to-microstrip transitions

This paper presents a new double-sided 3-dB branch-line coupler using CPW-to-microstrip via-hole transitions for multi-layers circuits. The coupler is designed using the even-odd mode method, and the circuit performance is calculated by the Finite Difference Time Domain (FDTD) method. The fabricated...

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Bibliographic Details
Main Authors: Lee, Joong-Ho, Lee, Hai-Young
Format: Conference Proceeding
Language:English
Subjects:
Arm
Bandwidth
Bonding
Circuit optimization
Coplanar waveguides
Coupling circuits
Finite difference methods
Impedance
Microstrip
Microwave integrated circuits
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Summary:This paper presents a new double-sided 3-dB branch-line coupler using CPW-to-microstrip via-hole transitions for multi-layers circuits. The coupler is designed using the even-odd mode method, and the circuit performance is calculated by the Finite Difference Time Domain (FDTD) method. The fabricated double-sided 3-dB branch-line coupler has /spl plusmn/0.5 dB maximum power imbalance and /spl plusmn/1/spl deg/ phase imbalance, 15 dB minimum isolation and 15 dB minimum return loss over a 24% bandwidth centered at 2 GHz. The high performance and the manufacturing compatibility can be effectively used for multi-layers circuits.
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2000.863261