TY - JOUR
T1 - High-frequency wideband quadrature coupler using transformer and lumped elements
AU - Hou, Zhang Ju
AU - Chiu, Leung
AU - Xue, Quan
PY - 2014/12/4
Y1 - 2014/12/4
N2 - A lumped quadrature coupler based on a ferromagnetic core is proposed for high-frequency (HF) application. The four terminals of the transformer are connected to the four ports, whereas two inductors and two capacitors are connected between two adjacent ports. The bandwidth is only limited by magnitude imbalance. A 13.56 MHz prototype is designed and tested. A 69% bandwidth is achieved with ±3 dB magnitude imbalance. Within the frequency band, the measured return loss is greater than 31.57 dB, port-to-port isolation is greater than 33.21 dB and the phase imbalance is
AB - A lumped quadrature coupler based on a ferromagnetic core is proposed for high-frequency (HF) application. The four terminals of the transformer are connected to the four ports, whereas two inductors and two capacitors are connected between two adjacent ports. The bandwidth is only limited by magnitude imbalance. A 13.56 MHz prototype is designed and tested. A 69% bandwidth is achieved with ±3 dB magnitude imbalance. Within the frequency band, the measured return loss is greater than 31.57 dB, port-to-port isolation is greater than 33.21 dB and the phase imbalance is
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U2 - 10.1049/el.2014.2216
DO - 10.1049/el.2014.2216
M3 - RGC 21 - Publication in refereed journal
SN - 0013-5194
VL - 50
SP - 1954
EP - 1955
JO - Electronics Letters
JF - Electronics Letters
IS - 25
ER -