Title :
Wideband Slot-Coupled Butler Matrix
Author :
Moscoso-Martir, Alvaro ; Molina-Fernandez, I. ; Ortega-Monux, A.
Author_Institution :
Dept. de Ing. de Comun., Malaga Univ., Malaga, Spain
Abstract :
We present a multilayer 4 × 4 Butler matrix based on corrugated slot-coupled structures, which operates over the complete UWB band (3.1 to 10.6 GHz) with excellent phase and amplitude performance. A prototype has been fabricated which covers the UWB band with a measured return loss better than 21 dB, an isolation better than 24 dB, an amplitude imbalance lower than 1.2 dB and a maximum differential phase error of ±4.5°.
Keywords :
directional couplers; microwave phase shifters; passive networks; UWB; amplitude imbalance; corrugated slot-coupled structures; frequency 3.1 GHz to 10.6 GHz; return loss; wideband slot-coupled Butler matrix; Butler matrices; Directional couplers; Loss measurement; Phase shifters; Ultra wideband technology; Butler matrix; multisection hybrid; multisection phase shifter; slot-coupled directional coupler; ultra-wideband (UWB);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2014.2303167
