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Reducing the mutual coupling effect in adaptive nulling using a re-defined mutual impedance

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1 Author(s)
Hon Tat Hui ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

The effect of mutual coupling in an adaptive antenna array for the nulling of interferences is investigated. The concept of mutual impedance is re-defined to take into account of the scattering effect due to the other antenna elements in the array. The re-defined mutual impedances are used to reduce the mutual coupling effect by calculating the open-circuit voltages from the measured voltages on the antenna terminals. Results show that by using the re-defined mutual impedances, substantial improvements in term of the depths and the accuracy of the nulls can be obtained over a previous method.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:12 ,  Issue: 5 )