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
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