In Situ Measurement of UHF Wearable Antenna Radiation Efficiency Using a Reverberation Chamber
IEEE Antennas and Wireless Propagation Letters(2008)
摘要
The radiation efficiency and resonance frequency of five compact antennas worn by nine individual test subjects was measured at 2.45 GHz in a reverberation chamber. The results show that, despite significant differences in body mass, wearable antenna radiation efficiency had a standard deviation less than 0.6 dBand the resonance frequency shift wasless than 1% between test subjects. Variability in the radiation efficiency and resonance frequency shift between antennas was largely dependant on body tissue coupling which is related to both antenna geometry and ra- diation characteristics. The reverberation chamber measurements were validated using a synthetic tissue phantom and compared with results obtained in a spherical near field chamber and finite- difference time-domain (FDTD) simulation.
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关键词
Resonance,Resonant frequency,Testing,Antenna measurements,Reverberation chamber,Finite difference methods,Time domain analysis,Frequency measurement,Geometry,Imaging phantoms
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