Wideband Null Frequency Scanning Circular Sector Patch Antenna Under Triple Resonance

In this article, a novel design approach to triple-resonant, circular sector patch antenna with wideband null frequency scanning functionality is advanced. At first, the operation principle of null frequency scanning functionality is revealed by the simplest, straight electric dipole under multiple...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2020-11, Vol.68 (11), p.7266-7274
Main Authors: Wu, Zhi-Fang, Lu, Wen-Jun, Yu, Jian, Zhu, Lei
Format: Article
Language:English
Subjects:
Antennas
Bandwidths
Broadband
Design
Electric dipoles
Frequency scanning
Magnetic dipoles
Magnetic resonance
null scanning
Parametric statistics
Parametric study
patch antenna
Patch antennas
Prototypes
Radiators
Substrates
Synthesis
Triple-mode resonance
Wideband
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Summary:In this article, a novel design approach to triple-resonant, circular sector patch antenna with wideband null frequency scanning functionality is advanced. At first, the operation principle of null frequency scanning functionality is revealed by the simplest, straight electric dipole under multiple resonances. Then, a triple-resonant circular sector patch antenna is designed based on a double-wavelength prototype magnetic dipole by synthesizing it usable resonant modes. As synthesized, the resonant TM 12/17,1 , TM 36/17,1 , and TM 60/17,1 modes within a 255° circular sector patch radiator can be simultaneously excited, properly perturbed, and then used to realize a wideband null frequency scanning functionality. Next, different prototype antennas are designed and fabricated and experimentally verified the design approach on a single layered air substrate. As finally demonstrated, the antenna can exhibit a null frequency scanning range from \theta =+ 35^{\circ } to −60° within an available radiation bandwidth (ARB) of 24% (i.e., 2.20-2.80 GHz) for null depth smaller than −10 dB.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2020.2995459