Designing a novel broadband microstrip antenna with capacitive feed

Author

Ying, Liu ; Jianping, Liu ; Ping, Li

Author_Institution

Dept. of Commun. Eng., Eng. Coll. of CAPF, Xi´´an, China

Volume

1

fYear

2011

fDate

26-30 July 2011

Firstpage

156

Lastpage

159

Abstract

The microstrip antennas have been widely used in recent years for their good characteristics such as electrically thin, lightweight, low cost and so on. However, the electrical performance of the basic microstrip antenna suffers from a number of serious drawbacks; especially its narrow impedance bandwidth restricts the performance of antennas in ultra- wideband (UWB) applications. To overcome the narrow impedance bandwidth associated with probe-fed microstrip antennas, a novel broadband microstrip antenna element is presented. The small antenna comprises a air cavity in the substrate, a capacitively-fed patch which is attached by coaxial probe, and a cut slot on the edge. The analysis of HFSS shows the broadband operation and low VSWR is obtained by adaptable length and width of the cut slot, air cavity, and feed patch. The simulation indicates its bandwidth is 48% under S11≤-10dB, covering 4GHz~6GHz.

Keywords

antenna feeds; broadband antennas; microstrip antennas; microwave antennas; probes; ultra wideband antennas; HFSS; UWB applications; VSWR; broadband microstrip antenna; capacitive feed; capacitively-fed patch; coaxial probe; electrical performance; narrow impedance bandwidth; ultrwideband applications; Finite element methods; Resonant frequency; Ultra wideband antennas; air cavity; broadband antenna; capacitive feed; microstrip antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), 2011

Conference_Location

Harbin

Print_ISBN

978-1-4244-9792-8

Type

conf

DOI

10.1109/CSQRWC.2011.6036909

Filename

6036909