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Publication - Mr Oliver James

    Measurement of Efficiency Degradation Due to External Detuning of a Tunable Patch Antenna

    Citation

    Norman, OJ, Hilton, GS & Beach, MA, 2016, ‘Measurement of Efficiency Degradation Due to External Detuning of a Tunable Patch Antenna’. in: 2016 IEEE International Symposium on Antennas and Propagation (APSURSI): Proceedings of a meeting held 26 June - 1 July 2016, Fajardo, Puerto Rico, USA. Institute of Electrical and Electronics Engineers (IEEE), pp. 2145-2146

    Abstract

    Realistic deployment scenarios for narrow-band mobile terminal antennas can place the antenna in close proximity to sources of detuning such as the user’s hand. Undesirable side effects can include frequency shifts off-resonance and degraded impedance matching, reducing the overall system efficiency. Here,
    3D radiation patterns and radiated efficiency measurements were used to evaluate the ability of a tunable matching network to preserve system efficiency in a patch antenna detuned with a hand phantom. The results indicated a trend for improving tuner benefit as a function of increasing severity of detuning.
    However, the transducer efficiency of 69%—which is a major issue in system evaluation—was too low to justify the improved impedance matching with the degree of detuning examined here.

    Full details in the University publications repository