Title :
Broadband characteristics of capacitively loaded monopole antennas
Author :
Yegin, K. ; Martin, A.Q.
Author_Institution :
Dept. of Electr. & Comput. Eng., Clemson Univ., SC, USA
Abstract :
The narrowband frequency characteristics of straight-wire antennas can be overcome by proper loading of the antenna. The bandwidth characteristics of the loaded antennas are investigated through an optimization routine. A bandwidth ratio of 7.58:1 is achieved with a 0.75 meter long capacitively loaded antenna and a simple matching network. The current distribution of the antenna is determined numerically by the method of moments (MoM). The input impedance can then be calculated easily with the knowledge of the excitation voltage across the terminals of the antenna.
Keywords :
capacitance; current distribution; electric impedance; impedance matching; method of moments; monopole antennas; optimisation; wire antennas; 0.75 m; MoM; antenna loading; bandwidth characteristics; bandwidth ratio; broadband characteristics; capacitively loaded monopole antennas; current distribution; excitation voltage; input impedance; matching network; method of moments; optimization routine; straight wire antennas; Bandwidth; Broadband antennas; Current distribution; Loaded antennas; Message-oriented middleware; Moment methods; Narrowband; Resonance; Resonant frequency; Transmitting antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549900
