Dielectric frequency filtering lens antennas for radar measurements at 240 GHz

Sven Thomas; Alex Shoykhetbrod; Nils Pohl

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Dielectric frequency filtering lens antennas for radar measurements at 240 GHz

机译：Dielectric frequency filtering lens antennas for radar measurements at 240 GHz

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Modern radar sensors are gaining more and more relevance for several industrial measurementapplications. To achieve the required range resolution and measurement accuracy, theuse of higher frequencies beyond 100 GHz is beneficiary. A commonly used signal generationconcept in fully integrated radar transceivers is to use a fundamental oscillator with subsequentfrequency multiplication. Depending on the overall system concept, this type of signalgeneration suffers from a fundamental feed-through signal which generates false targets in frequencymodulated continuous wave operation. Additionally, those unwanted signal componentsradiated by the sensors might be problematic for legal conformity or electromagnetic(EM) interference compliance. This paper presents a novel concept for frequency filteringdielectric lens antennas, to suppress unwanted signal components at harmonic frequenciesbased on interference filtering effects. Besides the EM simulations to theoretically provethis concept, multiple prototypes of filtering lens antennas were fabricated by conventionalmechanical and additive manufacturing. Using a self-developed, ultra-compact radar sensor,measurements were taken to compare the lens antenna prototypes in terms of filtering performanceand how the material characteristics affect the filtering performance. Withinthese measurements, the successful suppression of false targets caused by fundamentalfeed-through signals is demonstrated.

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来源
《International journal of microwave and wireless technologies》 |2023年第6期|945-956|共12页
作者
Sven Thomas; Alex Shoykhetbrod; Nils Pohl;
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作者单位

Department for Integrated Circuits and Sensor Systems, Fraunhofer FHR, Wachtberg, Germany;

Department for Integrated Circuits and Sensor Systems, Fraunhofer FHR, Wachtberg, Germany,Chair forIntegrated Systems, Ruhr-University Bochum, Bochum, Germany;

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原文格式 PDF
正文语种英语
中图分类一般性问题;
关键词
Antenna design; modelling and measurements; Radar;

Dielectric frequency filtering lens antennas for radar measurements at 240 GHz

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