Lens-loaded Cavity Antenna with Detector Diode as a Direction-of-Arrival Estimator

Muhammad Ali Babar Abbasi*, Vincent Fusco, Okan Yurduseven, Rafay Iqbal Ansari, Simon L. Cotton

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

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This letter proposes a novel direction-of-arrival (DoA) estimation approach that uses a lens-loaded, coded aperture antenna connected to a detector diode for millimeter-wave (mmWave) frequencies. The presented approach exploits three distinct but closely related properties of mmWave communication front-end hardware: First, the quasi-random radiation modes created by a lens-loaded cavity antenna; Second, the frequency-diverse impulse response of oversized metallic cavities; Third, the sensitivity of detector diodes at mmWave frequencies. Critically, we use a combination of the synthesis approach and experimental results to demonstrate that DoA estimation is possible with less complex hardware as compared to conventional methods, where an array of mmWave antennas is typically employed for DoA estimation. Bandwidth-to-accuracy tradeoff is thoroughly studied, which is an important commercial matrix. It is demonstrated that the lens-loaded cavity antenna with a detector diode circuit can be an apt choice for DoA estimation. Finally, it is shown that the proposed approach provides fast and accurate DoA estimation, thus inherently suitable for DoA estimation in future mmWave systems.

Original languageEnglish
Pages (from-to)2176-2180
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Issue number11
Early online date2 Jul 2021
Publication statusPublished - 1 Nov 2021


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