DocumentCode :
976728
Title :
Evaluation of antenna Q
Author :
Collin, R.E. ; Rothschild, S.
Author_Institution :
Case Western Reserve University, Cleveland, OH, USA
Volume :
12
Issue :
1
fYear :
1964
fDate :
1/1/1964 12:00:00 AM
Firstpage :
23
Lastpage :
27
Abstract :
A method is presented for evaluating the 
of an antenna, where the is defined as in conventional network theory. The method consists of subtracting the energy density associated with the power flow from the total energy density, thus enabling the magnetic and electric reactive energy to be computed. Specific application of the method is made to the evaluation of the of spherical and cylindrical modes. It is verified that the becomes very large when the order of the mode exceeds 
where 
is the radius of the sphere or cylinder on which the sources are located.
of an antenna, where the is defined as in conventional network theory. The method consists of subtracting the energy density associated with the power flow from the total energy density, thus enabling the magnetic and electric reactive energy to be computed. Specific application of the method is made to the evaluation of the of spherical and cylindrical modes. It is verified that the becomes very large when the order of the mode exceeds where is the radius of the sphere or cylinder on which the sources are located.Keywords :
Antennas; Cylindrical antennas; Q measurement; Spherical antennas; Antenna theory; Antennas and propagation; Energy storage; Helium; Impedance; Load flow; Magnetic resonance; Performance gain; Power dissipation; Upper bound;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1964.1138151
Filename :
1138151
Link To Document :
