Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 22, Issue 9, Pages 2230-2234Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2023.3281785
Keywords
Antenna arrays; Wideband; Ultra wideband antennas; Impedance; Substrates; Slot antennas; Patch antennas; Antennas; array; millimeter wave (mmWave); multimode; substrate-integrated waveguide (SIW); ultrawideband (UWB)
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A novel ultrawideband millimeter wave slotted circular patch antenna and array with enhanced bandwidth are proposed. The antenna elements are loaded with folded strips and fed by a substrate-integrated waveguide. An 8 x 8 antenna array prototype is designed and fabricated with measured large impedance fractional bandwidth and average radiation efficiency.
A novel ultrawideband millimeter wave (mmWave) slotted circular patch antenna and array are proposed in this letter, where each circular patch antenna element is loaded with three pairs of folded strips for enhancing the bandwidth and fed by a substrate-integrated waveguide through a coupling slot. As a result, a multimode antenna element with the ultrawideband characteristic can be realized, and the impedance fractional bandwidth (FBW) with |S-11| < -10 dB is up to 66.9%. Furthermore, an 8 x 8 antenna array prototype is designed and fabricated. Measured impedance FBW with |S-11| < -10 dB of 56% and measured average radiation efficiency of 73.8% are achieved. With the wideband and low-profile features, this antenna can be a promising candidate for mmWave communications.
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