Title :
Antenna Designer´s Notebook - Receiving mutual impedance between two normal-mode helical antennas (NMHAs)
Author :
Hui, H.T. ; Low, H.P. ; Zhang, T.T. ; Lu, Y.L.
Author_Institution :
Sch. of Inf. Technol. & Electr. Eng., Queensland Univ., Brisbane, Qld.
Abstract :
A new mutual impedance - the receiving mutual impedance - between two normal-mode helical antennas is defined, measured, and theoretically calculated. The variations of the receiving mutual impedance with antenna separation, with frequency, and with excitation source direction are critically investigated. An application of the receiving mutual impedance in direction finding demonstrates its more accurate description of the mutual coupling effect than that using the conventional mutual impedance
Keywords :
helical antennas; antenna separation; direction finding; excitation source direction; mutual coupling effect; normal-mode helical antennas; receiving mutual impedance; Antenna arrays; Antenna measurements; Antenna theory; Antennas and propagation; Directive antennas; Helical antennas; Impedance measurement; Loaded antennas; Mutual coupling; Receiving antennas;
Journal_Title :
Antennas and Propagation Magazine, IEEE
DOI :
10.1109/MAP.2006.1715238
