Title :
Low-Profile Dipole Antenna With Enhanced Impedance and Gain Performance for Wideband Wireless Applications
Author :
Fei Gao ; Fushun Zhang ; Lu Lu ; Tao Ni ; Yongchang Jiao
Author_Institution :
Nat. Key Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´an, China
Abstract :
A compact dipole-type antenna fed by coplanar striplines (CPSs) with enhanced impedance and gain performance across ultrawideband (UWB) operating bandwidth of 2.12-6 GHz is proposed in this letter. The proposed antenna consists of two conventional rectangular arms on the one side of a substrate, connected by shorting via holes to a pair of bigger arms on the other side of the substrate. With this structure, the bandwidth of a conventional dipole antenna is improved significantly, while the radiation pattern in the whole operating frequency remains consistent and lateral antenna dimension is reduced. The performance of the proposed antenna is validated experimentally using a wideband balun to realize the microstrip-coplanar-strip transition. The measured results show that the proposed antenna can achieve a gain of 2.2-3.8 dBi across a VSWR=2 impedance bandwidth of 2.8:1.
Keywords :
antenna feeds; antenna radiation patterns; baluns; coplanar waveguides; dipole antennas; microstrip transitions; ultra wideband communication; CPS; UWB technology; antenna radiation pattern; bandwidth 2.12 GHz to 6 GHz; compact antenna fed; coplanar striplines; gain performance enhancement; impedance enhancement; low-profile dipole antenna; microstrip-coplanar-strip transition; ultrawideband technology; wideband balun; wideband wireless applications; Antenna measurements; Antenna radiation patterns; Bandwidth; Dipole antennas; Impedance; Impedance matching; Ultra wideband antennas; Coplanar stripline (CPS); dipole; ultrawideband (UWB);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2013.2252141
