Analytical Computation of Mutual Impedance between Two Closely Spaced Antennas
2024 IEEE International Symposium on Antennas and Propagation and INC/USNCURSI Radio Science Meeting, AP-S/INC-USNC-URSI 2024, Florence, Italy, 14 - 19 July 2024, pp.2113-2114, (Full Text)
- Publication Type: Conference Paper / Full Text
- Doi Number: 10.1109/ap-s/inc-usnc-ursi52054.2024.10685905
- City: Florence
- Country: Italy
- Page Numbers: pp.2113-2114
- Middle East Technical University Affiliated: Yes
Abstract
Mutual impedance between two closely spaced an-tennas is analytically computed using spherical harmonics and reaction theorem. When two antennas are closely spaced, a reaction surface that lies completely in the convergence region of spherical wave expansion of both antennas can not be found. In this study, a method that overcomes this problem is introduced. The mutual impedance is expressed as a summation of the product of spherical harmonic coefficients of antennas. The validity of the proposed method is confirmed by analyzing half-wave dipoles and printed dipoles. In the latter case, the results are also confirmed by measurement.