A Dielectric Lens-Based Antenna Concept for High-Precision Industrial Radar Measurements at 24 GHz

Nils Pohl, Michael Gerding

Eu­ropean Micro­wa­ve Conference (EuMC), Ams­ter­dam


Abstract

A lens-based antenna with a solid dielectric ellipsoid PTFE lens for industrial tank level probing radar (TLPR) is presented. Due to limitations of the application, a high antenna gain at a limited size as well as a good matching were the main design goals. The presented antenna achieves a high gain of 25.9 dBi with a beamwidth of ? 8.4 ? at an outer diameter of 74mm in simulations, which is confirmed by measurements. Despite the lens surface reflections, a good input matching of ? ?20 dB is achieved in the full wide frequency band from 23 GHz to 28 GHz, which enables monostatic radar operation even close to the antenna. A laboratory radar setup is used to confirm the accuracy impact on distance measurements in a scenario with disturbing reflectors.

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