A study of the antenna radiation efficiency for electrically small antennas
- Resource Type
- Conference
- Authors
- Fujita, Keisuke; Shirai, Hiroshi
- Source
- 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI) Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE. :1522-1523 Jul, 2013
- Subject
- Fields, Waves and Electromagnetics
Antennas
- Language
- ISSN
- 1522-3965
1947-1491
Antenna radiation efficiency for electrically small antennas has been discussed in this paper. The radiated field is expressed in terms of spherical harmonic TE and TM modes and radiated and dissipated powers are described by this modal excitation coefficients. By carefully evaluating the above coefficients, upper bound of the radiation efficiency has been estimated.