ESA measurements using the hybrid fibre-optic reflection measurement system

摘要

Since the introduction of the Wheeler Cap method to measurethe radiation efficiency of an Electrically Small Antenna (ESA), there havebeen several techniques presented in literature that have either enhancedon the method or provided an alternative technique. This paper presentsmeasurements of the radiation efficiency of an electrically small monopoleusing the Hybrid Fibre-Optic RF Reflection Measurement System (HRS)integrated into the Wheeler Cap. The HRS isolates the ESA from the measurementsystem [1]. The ESA’s reflection coefficient can then be measuredwith the isolated ESA inside the Wheeler Cap and in freespace to determineits efficiency. The HRS is also integrated into a far-field measurementrange to measure the far-field radiation pattern of the ESA.