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Antenna Designer's Notebook - Receiving mutual impedance between two normal-mode helical antennas (NMHAs)

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4 Author(s)
H. T. Hui ; Sch. of Inf. Technol. & Electr. Eng., Queensland Univ., Brisbane, Qld. ; H. P. Low ; T. T. Zhang ; Y. L. Lu

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

Published in:

IEEE Antennas and Propagation Magazine  (Volume:48 ,  Issue: 4 )