Abstract
A planar sectoral antenna is presented, optimized for highly precise impulse-radio ultrawideband (IR-UWB) indoor localization with minimal range estimation biasing. By judiciously combining two planar inverted-F antenna elements into one footprint, a large half-power beamwidth (HPBW) is obtained in the [3.2448-4.7424] GHz band, thereby covering channels 1-4 of the IEEE 802.15.4a-2011 standard. Through system-level optimization, the system fidelity factor (SFF) is maximized for a minimal value of at least 90$\text{\%}$ within its entire HPBW, while minimizing the orientation-specific range estimation biasing down to 10 mm. To validate the antenna performance, measurements have been performed in both the frequency and time domain, showing a HPBW larger than 120$^\circ$ in the complete frequency band of operation and an SFF larger than 90$\text{\%}$ and range biasing lower than 4 mm within the antenna's HPBW.
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