https://orcid.org/0000-0001-7688-5130
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Abstract
In this paper, we propose a reflector antenna with a microstrip-patch-array offset feed. The proposed antenna offers several advantages in design flexibility, especially to determine the horizontal and vertical beam patterns by the modular feed and the reflector curvature design, respectively. Moreover, it provides an internal tuning mechanism in the form of a tuning strip which is relatively simple to apply. The paper describes the steps in a parametric study carried out to minimize the antenna dimensions. The resulting optimized design is found to be around 50% smaller in dimension than the initial design of the proposed antenna. A demonstrator for experimental analysis, consisting of a transmit and a receive antenna, has been constructed, and the isolation between the antennas is found to be better than 70 dB. The antenna demonstrator has been integrated with an FMCW radar transceiver and satisfactorily tested to operate as a coastal surveillance radar.
Acknowledgment
The authors would like to thank M. Hajian and J. Zijderveld from Delft University of Technology, who carried out the initial simulations of the MPA feed and measurements of the reflector-feed configuration, respectively. The authors are also grateful to O. D. Winarko and B. Harnawan from Labs247 for their assistance in the antenna measurements.
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No potential conflict of interest was reported by the author(s).
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Notes on contributors
Andrian Andaya Lestari
Andrian Andaya Lestari was born in Bogor, Indonesia, in 1966. He received M.Sc. and Ph.D. degrees in electrical engineering from Delft University of Technology (TU Delft), The Netherlands, in 1993 and 2003, respectively. From 1998 to 2013 he was with the Faculty of Electrical Engineering, Mathematics and Computer Science of TU Delft. At present, he is a senior scientist at LABS 247 in Jakarta, Indonesia, and assistant professor at the Indonesia Defense University. During his career, he has completed more than 16 R&D projects, developed 9 radar prototypes, and published over 100 papers and patents. His research interests include radar systems and UWB transmissions.
Leo P. Ligthart
Leo P. Ligthart was born in Rotterdam, The Netherlands, in 1946. He received the B.E. (cum laude) and Ph.D. degrees from the Delft University of Technology (TU Delft), The Netherlands. Since 1988, he has been the Chair of MW transmission, remote sensing, radar, and positioning and navigation with TU Delft. He supervised over 50 Ph.D.s. He is the Founder of the IRCTR, TU Delft. He is currently an Emeritus Professor with TU Delft and also a Guest Professor with Universities in Indonesia and China. He gives various courses on radar, remote sensing and antennas. He has authored over 700 papers, various book chapters, and books. His current research interests include antennas and propagation, radar and remote sensing, and satellite, mobile, and radio communications. He is a Founding Member of the EuMA. He is a fellow of IEEE and IET, and Academician of the Russian Academy of Transport. He received the Honorary Doctorates from MSTUCA, Moscow; Tomsk State University; and MTA Romania. He is the Chairman of CONASENSE and a BoG Member of the IEEE-AESS. He chaired 1st EuMW in 1998 and initiated EuRAD in 2004.