Title :
Integrated Ultrawideband/Narrowband Rectangular Dielectric Resonator Antenna for Cognitive Radio
Author :
Yongfeng Wang ; Naizhi Wang ; Denidni, Tayeb A. ; Qingsheng Zeng ; Gao Wei
Author_Institution :
Sch. of Electron. & Inf., Northwestern Polytech. Univ., Xi´an, China
Abstract :
An integrated ultrawideband (UWB) and narrowband (NB) rectangular dielectric resonator antenna (DRA) is presented. The proposed antenna consists of a UWB rectangular DRA excited by a bevel-shaped patch and an NB DRA excited by a strip. The measured results demonstrate that the UWB and NB antenna provides a 2:1 voltage standing wave ratio (VSWR) bandwidth for 2.4-12 and 2.3-4.5 GHz, respectively, with the same polarization. Moreover, two symmetrical short-circuited strips are introduced to improve the isolation between the two ports. This can be a suitable candidate for applications in cognitive radio, where the UWB antenna can be used for spectrum sensing and the NB antenna for communication operation.
Keywords :
UHF antennas; antenna radiation patterns; cognitive radio; dielectric resonator antennas; microwave antennas; ultra wideband antennas; DRA; NB rectangular dielectric resonator antenna; UWB rectangular dielectric resonator antenna; VSWR bandwidth; antenna radiation patterns; bevel-shaped patch; cognitive radio; frequency 2.3 GHz to 4.5 GHz; frequency 2.4 GHz to 12 GHz; narrowband rectangular dielectric resonator antenna; short circuited strips; spectrum sensing; ultrawideband rectangular dielectric resonator antenna; voltage standing wave ratio; Antenna radiation patterns; Cognitive radio; Dielectric resonator antennas; Dielectrics; Niobium; Ultra wideband antennas; Cognitive radio; dielectric resonator antenna; isolation; polarization; ultrawideband;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2314480
