Title :
Radiation characteristics of modeling antennas on imperfect grounds
Author :
Lin-Shu, Huang ; Hong-Ke, Li ; Kai, XU
Abstract :
Radiation efficiency of antenna at radio frequency may be changed obviously by different grounds under them. Using the modified reflect coefficients of surface impedance, an image method combined with the MOM is proposed to analyze the input impedance of the antennas on different grounds media in this paper. By comparing the calculated data with the measured data, a conclusion is drew that at very low frequency(VLF), the radiation efficiency of the vertical antennas on different grounds are different in degree. And their input impedances are varied with the frequency and the causes are analyzed.
Keywords :
antenna theory; method of moments; surface impedance; wire antennas; antenna radiation efficiency; image method; imperfect grounds; method of moment; modeling antennas; modified reflect coefficients; radiation characteristics; radiofrequency antenna; surface impedance; vertical wire antenna; very low frequency antenna; Frequency; Green function; Image analysis; Integral equations; Open wireless architecture; Performance analysis; Polarization; Reflector antennas; Surface impedance; Wire;
Conference_Titel :
Global Mobile Congress 2009
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5302-3
Electronic_ISBN :
978-1-4244-5301-6
DOI :
10.1109/GMC.2009.5295862
