TY - GEN
T1 - High directivity quarter-wave microstrip coupler with cancellation circuit of Wilkinson divider
AU - Yamauchi, Kazuhisa
AU - Inoue, Akira
AU - Miyazaki, Moriyasu
PY - 2008
Y1 - 2008
N2 - A high directivity quarter-wave microstrip coupler with a cancellation circuit of a Wilkinson divider is presented. The presented coupler utilizes a cancellation circuit between a coupling port and an isolation port of the conventional quarterwave microstrip coupler to enhance the isolation at the desired frequency. The cancellation circuit consists of the Wilkinson divider, and an attenuator. The frequency where the isolation is enhanced can be controlled by the attenuator. The cancellation circuit can be applied to the couplers that have already been fabricated. The measured directivity of the presented coupler is improved from 8.9dB to 24.9dB at 1.9GHz, compared with the conventional coupler.
AB - A high directivity quarter-wave microstrip coupler with a cancellation circuit of a Wilkinson divider is presented. The presented coupler utilizes a cancellation circuit between a coupling port and an isolation port of the conventional quarterwave microstrip coupler to enhance the isolation at the desired frequency. The cancellation circuit consists of the Wilkinson divider, and an attenuator. The frequency where the isolation is enhanced can be controlled by the attenuator. The cancellation circuit can be applied to the couplers that have already been fabricated. The measured directivity of the presented coupler is improved from 8.9dB to 24.9dB at 1.9GHz, compared with the conventional coupler.
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U2 - 10.1109/EUMC.2008.4751421
DO - 10.1109/EUMC.2008.4751421
M3 - Conference contribution
AN - SCOPUS:62349085835
SN - 9782874870064
T3 - Proceedings of the 38th European Microwave Conference, EuMC 2008
SP - 195
EP - 198
BT - Proceedings of the 38th European Microwave Conference, EuMC 2008
T2 - 38th European Microwave Conference, EuMC 2008
Y2 - 27 October 2008 through 31 October 2008
ER -