Planar Sectoral Antenna for IR-UWB Localization With Minimal Range Estimation Biasing

Abstract

A planar sectoral antenna is presented, optimized for highly precise Impulse-Radio Ultra-Wideband (IR-UWB) indoor localization with minimal range estimation biasing. By judiciously combining two planar inverted-F antenna (PIFA) elements into one footprint, a large half-power beamwidth (HPBW) is obtained in the [3.2448-4.7424] GHz band, thereby covering channels 1 to 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% 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 • in the complete frequency-band of operation and an SFF larger than 90% and range biasing lower than 4 mm within the antenna's HPBW.

A wideband monopolar patch antenna with a high system fidelity factor for IR‐UWB application

“…In particular, the steady group delay represents the ability to radiate signals during the band without distortion and the SFF measures the similarity of waveforms. The SFF 3 is defined by $$$SFF=\mathop{\max }\limits_{t}\left|\frac{{<mpadded xmlns="http://www.w3.org/1998/Math/MathML">\int </mpadded>}_{{t}_{0}}^{{t}_{n}}{u}_{Tx}(\tau ){u}_{Rx}(\tau +t)d\tau }{\sqrt{{<mpadded xmlns="http://www.w3.org/1998/Math/MathML">\int </mpadded>}_{{t}_{0}}^{{t}_{n}}{| {u}_{Tx}(\tau )| }^{2}d\tau {<mpadded xmlns="http://www.w3.org/1998/Math/MathML">\int </mpadded>}_{{t}_{0}}^{{t}_{n}}{| {u}_{Rx}(\tau )| }^{2}d\tau }}\right|.$$$ where $${u}_{Tx}$$( t ) and $${u}_{Rx}$$( t ) are the transmitted and received pulse, respectively.…”

“…Due to the limitation of the installation environment, the key characteristics are compact size, pattern stability, and high system fidelity factor (SFF). 2 Several state-of-the-art IR-UWB antennas 1,3,4 show compact structures and SFFs higher than 95%. However, their radiation properties are hemispherical.…”

Design of a Six-Port Compact UWB MIMO Antenna With a Distinctive DGS for Improved Isolation

“…The time-domain metrics group delay (GD) and fidelity factor (FF) are examined for the designed antenna. To perform time-domain analysis, identical antennas are arranged 100 mm apart in a face-to-face and side-to-side configuration [22], [23]. The transmitted and received pulse qualities can be studied in order to ensure seamless communication.…”