Title :
Analysis of Cavity Losses in Antenna Efficiency Measurements
Author :
Johnston, Ronald H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Calgary Univ., Alta.
Abstract :
A "modified wheeler cap" measurement method has been developed to determine the radiation efficiency of electrically small antennas. It is assumed that the losses of the "cap" (or cavity) itself are negligible. EM numerical simulations show that losses in the cavity can reduce the apparent measured efficiency of the antenna
Keywords :
antenna radiation patterns; antenna radiation efficiency measurements; cavity losses analysis; modified wheeler cap measurement method; Antenna measurements; Antenna theory; Conductors; Electric variables measurement; Frequency; Impedance measurement; Loss measurement; Reflector antennas; Size measurement; Surface resistance; Antenna measurements; cavity losses; radiation efficiency;
Conference_Titel :
Microwave Conference, 2006. 36th European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-6-0
DOI :
10.1109/EUMC.2006.280996
