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

Volume

12

fYear

2013

fDate

2013

Firstpage

372

Lastpage

375

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);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2013.2252141

Filename

6477075