A Miniaturized Dual-Band Dual-Beam Filtering Patch Antenna With Orthogonal Beam Pointing

A miniaturized dual-band dual-beam filtering patch antenna with orthogonal beam pointing is proposed. By using a cross-shaped feedline with two pairs of orthogonal common-mode (CM) currents, TM02 and TM20 modes are excited with suppression of adjacent TM10 and TM12 modes, and radiation null 1 (RN1)...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2024-04, Vol.72 (4), p.3754-3759
Main Authors: Zheng, Zhirui, He, Jiahao, Tan, Xiaoheng, Li, Mei
Format: Article
Language:English
Subjects:
Antennas
Dual band
dual beam
Far fields
Filtering
filtering antenna
Filtration
Metal strips
miniaturization
orthogonal beam pointing
Patch antennas
Probes
Quantum cascade lasers
Radiation
Rejection
Substrates
Wireless communication
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Summary:A miniaturized dual-band dual-beam filtering patch antenna with orthogonal beam pointing is proposed. By using a cross-shaped feedline with two pairs of orthogonal common-mode (CM) currents, TM02 and TM20 modes are excited with suppression of adjacent TM10 and TM12 modes, and radiation null 1 (RN1) is introduced in both polarizations. Due to far-field nulls of orthogonal dual-beam patterns, intrinsic radiation null 1 (RN _{\mathrm {i}1} ) and RN _{\mathrm {i}2} are generated. With miniaturization, by etching periodic short slots, RN _{\mathrm {i}3} related to the high-order harmonic can be used, its frequency can be significantly controlled, and the radiation pattern is reshaped to effectively improve the rejection at RN _{\mathrm {i}3} in x -polarization. To ensure high selectivity at each sideband while remaining compact, nested two quasi-circular loops (QCLs) and a cross-shaped metal strip (CSMS) are employed to create RN2-RN4 in both polarizations. Thus, a total of eleven RNs are yielded, aching high selectivity and deep stopband rejection. With a small size of 0.40\lambda _{0} \times 0.44\lambda _{0} \times 0.028\lambda _{0} , a prototype is fabricated and tested. Measured results show that dual beams in 5.3-5.53 GHz point toward the x -axis direction, while dual beams in 6.34-6.66 GHz point toward the y -axis direction, satisfying the requirements of point-to-multipoint scenarios providing different wireless services in orthogonal orientations.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2024.3367418