Title :
A beam steerable CPW-CTS antenna array using reconfigurable metamaterial-based phase shifters for cognitive radio applications
Author :
Yue Li ; Zhijun Zhang ; Zhenghe Feng ; Iskander, Magdy F.
Author_Institution :
State Key Lab. on Microwave & Digital Commun., Tsinghua Univ., Beijing, China
Abstract :
In this paper, a coplanar waveguide (CPW) fed continuous transverse stub (CTS) antenna array with beam steering capability is proposed and validated for cognitive radio applications. A novel reconfigurable negative reflect index (NRI) phase shifter is integrated with the CTS element to provide continuous phase states. The proposed phase shifter is based on CPW transmission line and consists of a series capacitor and two groups of shunt inductors. The continuous switching mechanism is achieved by adopting two groups of pin diodes and one varactor. A three-stage reconfigurable NRI phase shifters are integrated with the CPW-CTS antenna array, and a beam steering range of 81°-107° is achieved with stable gain.
Keywords :
antenna feeds; beam steering; cognitive radio; coplanar waveguides; microwave metamaterials; phase shifters; waveguide antenna arrays; antenna beam steering; beam steerable CPW-CTS antenna array; cognitive radio applications; continuous transverse stub antenna array; coplanar waveguide feed; reconfigurable metamaterial based phase shifter; reconfigurable negative reflect index phase shifter; series capacitor; shunt inductor; Antenna arrays; Arrays; Beam steering; Coplanar waveguides; Phase shifters; Shunts (electrical);
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6929206
