Metasurface-based, Pattern-reconfigurable, Wide-angle Scanning Antenna Array for UAV-borne Radar

Christos Milias, Rasmus B. Andersen, Thomas H. Jorgensen, Pavlos I. Lazaridis, Zaharias D. Zaharis, Bilal Muhammad, Jes T.B. Kristensen, Albena Mihovska, Dan D.S. Hermansen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper presents the design of an X-band, linear antenna array suitable for UAV-borne radars. The array is synthesized by thirteen reflector-backed, pattern-reconfigurable dipoles arranged in an E-plane configuration. The dipole elements provide three different radiation patterns in the elevation plane (H-plane), where the main beam can be steered towards -40°, 0° and 40° for the three states, respectively. This is achieved through the incorporation of two tunable metasurfaces in the antenna structure. These surfaces are composed of split-ring resonator (SRR) unit cells, which are controlled by diode switches to act either as a pass-band or a stop-band spatial filter for the incident waves. The final array design operates between 9.5 and 10.5 GHz, exhibits a maximum gain of almost 19 dBi and has a scanning range of \pm 65\circ in the azimuth plane for all three states of the dipoles' elevation radiation pattern. By combining the pattern-reconfigurability property of the elements in the elevation plane with electronic scanning in the azimuth plane, the proposed antenna array provides a wide coverage that enables the detection of targets flying at different altitudes and can also be exploited to correct a potential beam misalignment in airborne radar systems. As a result, it is an excellent candidate for low-cost, UAV-borne radar platforms for drone detection, sense-and-avoid, and surveillance applications.

Original languageEnglish
Title of host publication2023 IEEE Radar Conference, Proceedings
Subtitle of host publicationRadarConf23
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781665436694
ISBN (Print)9781665436700
Publication statusPublished - 21 Jun 2023
Event2023 IEEE Radar Conference - San Antonio, United States
Duration: 1 May 20235 May 2023

Publication series

NameProceedings of the IEEE Radar Conference
ISSN (Print)1097-5764
ISSN (Electronic)2375-5318


Conference2023 IEEE Radar Conference
Abbreviated titleRadarConf23
Country/TerritoryUnited States
CitySan Antonio

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