Symmetric microstrip, interdigital capacitor-compensated high directivity directional-coupler

초록

This article describes a symmetric capacitor-compensated microstrip directional-coupler design with very high directivity. The compensation capacitors are incorporated between the coupling lines as interdigital type on the PCB board. The prototype directional-coupler shows 19.6 dB coupling factor and achieves very high directivity of more than 45 dB at 1.9 GHz. (c) 2008 Wiley Periodicals, Inc.

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