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Abstract
A novel resonant cavity antenna (RCA) with low sidelobe levels over an enhanced bandwidth is presented. Radiation bandwidth of the antenna is increased by using a pair of complementary FSS layers, giving a positive reflection phase over a wide frequency range, as the proposed PRS. Low sidelobes are achieved by lowering the reflection amplitude of the PRS along its length while keeping reflection phase almost the same throughout the operating band. The performance of the proposed PRS is validated by creating a circular aperture RCA and measuring its radiation characteristics. The cavity is excited by an aperture coupled patch antenna having a broad impedance bandwidth. Prototype RCA gives a peak realized gain of 16.1 dBi and a 3-dB gain bandwidth of 8.6% ranging from 14.5 to 15.8 GHz. Measured sidelobe levels are reduced, respectively, to less than −17 dB and −23 dB in the E- and H-plane of the prototype antenna.
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No potential conflict of interest was reported by the author(s).
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Notes on contributors
M. Wasif Niaz
M. Wasif Niaz received the B.Sc. degree in electrical engineering from University of Engineering and Technology, Taxila, Pakistan in 2007 and the MS degree in electrical engineering from National University of Sciences and Technology (NUST), Pakistan in 2009. Currently he is working towards his Ph.D. degree in information and communication engineering at the Northwestern Polytechnical University (NWPU), Xi'an, China. His main research interests are design of printed antennas, slotted waveguide antennas and periodic structures (FSS, AMC, PRS & Metasurface).
S. H. H. Mashhadi
S. H. H. Mashhadi received B.E. degree in telecommunication (Electrical) engineering from Military College of Signals, National University of Sciences and Technology (NUST), Rawalpindi, Pakistan in 2007, and M.S. degree in communication engineering in 2009 from University of Manchester, UK where she was awarded Agilent's Best Student Award and is currently pursuing Ph.D degree in information and communication engineering from Northwestern Polytechnical University (NPU), Xi'an, China. Her research interests include dielectric resonator antennas, substrate integrated waveguide (SIW) fed DRAs and printed antennas.
Zhao Zhou
Zhao Zhou received the B.S. degree from Xidian University, Xi'an, China, in 2017, where he is currently pursuing the M.S. degree in electromagnetic field and microwave technology from the National Key Laboratory of Antennas and Microwave Technology. His research interests include dual-polarized antenna, wideband antenna, multiband antenna, and filtering antenna.
Yingzeng Yin
Yingzeng Yin received the B.S., M.S., and Ph.D. degrees in electromagnetic wave and microwave technology from Xidian University, Xi'an, China, in 1987, 1990, and 2002, respectively. From 1990 to 1992, he was a Research Assistant and an Instructor with the Institute of Antennas and Electromagnetic Scattering, Xidian University, where he was an Associate Professor with the Department of Electromagnetic Engineering from 1992 to 1996, and has been a Professor since 2004. His current research interests include the design of microstrip antennas, feeds for parabolic reflectors, artificial magnetic conductors, phased array antennas, base-station antennas, and computer aided design for antennas.