Compact Elliptical Monopole Antenna With Impedance Bandwidth in Excess of 21:1

• Published in: IEEE transactions on antennas and propagation Vol. 55; no. 11; pp. 3082 - 3085
• Main Authors: Zhong, Shun-Shi, Liang, Xian-Ling, Wang, Wei
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.11.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna accessories; Antenna radiation patterns; Antennas; Antennas and propagation; Applied sciences; Bandwidth; Coplanar waveguide (CPW); Coplanar waveguides; Exact sciences and technology; Frequency; Ground plane; Impedance; Microwave antennas; miniaturization; monopole antenna; Monopole antennas; Monopoles; Optimization; Radiocommunications; Shape; Slot antennas; super-wideband; Telecommunications; Telecommunications and information theory; Wavelengths; Tapered waveguide; Wide band; super-wideband; Standing wave ratio; Coplanar waveguide (CPW); Non directive antenna; Monopole antenna; Antenna feeds; Elliptical configuration; Trapezoidal shape; Coplanar waveguides; Miniaturization
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2007.908565

A compact CPW-fed monopole antenna composed of an elliptical monopole patch and a coplanar trapeziform ground plane is introduced. The simulated and experimental results demonstrate that this antenna achieves a ratio impedance bandwidth of 21.6:1 for VSWR les 2, and exhibits a nearly omnidirectional radiation pattern, while its area is only about 0.19 lambda 1 times 0.16 lambda 1 where lambda 1 is the wavelength of the lowest operating frequency. By comparing with various designs, it is shown that its bandwidth broadening comes from three factors: the optimum elliptical monopole shape, a trapeziform ground plane and a tapered CPW feeder.