Abstract
A coupled half-mode cavity-backed slot antenna for high-precision impulse-radio ultra-wideband (IR-UWB) localization applications in the [3.7740; 4.7424] GHz frequency band of the IEEE 802.15.4a-2011 standard is designed and implemented in air-filled substrate-integrated-waveguide (AFSIW) technology. The antenna is matched to 50Ω in the [3.6400; 4.8300] GHz frequency band, yielding a bandwidth of 1.19 GHz or 28.1%. Furthermore, a total antenna efficiency higher than 91.0% and a system fidelity factor (SFF) higher than 98% is achieved within the 3dB-beamwidth of the antenna, making it suitable for high-precision IR-UWB localization.
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