Varactor-based Frequency-reconfigurable Dual-polarized mm-Wave Antenna Array for Mobile Devices

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-08-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
6628-6638
Series
IEEE Transactions on Antennas and Propagation, Volume 71, issue 8
Abstract
In this paper, a dual-polarized frequency-reconfigurable mm-wave patch antenna array is described. The design incorporates varactor diodes symmetrically loaded onto the four corners of a square patch. Parallel plate series capacitors are constructed to achieve the required low total capacitance by moving the square patch to an inner layer. Additionally, novel dual-function shorting vias are implemented into the structure, which serve as RF choke for providing dc-bias voltage to the varactors, and behave as shunt inductive loadings to improve radiation efficiency. A four-element antenna array is implemented, and placed into a 21×4.5mm2 cavity. The proposed antenna array can be tuned from 23.2 to 30.2 GHz by adjusting the varactor capacitance from 0.22 to 0.033 pF. The array achieves over 20-dB isolation between the orthogonal-polarized antenna elements, and more than 15-dB isolation between the same-polarized antenna elements. Total efficiency exceeds -2.5 dB across the tuning range. Peak gain varies from 8.9 to 10.5 dBi. The proposed dual-polarized antenna array offers notable advantages including a wide frequency-tuning range, high efficiency, compact size, and beam-forming capability.
Description
Publisher Copyright: Author
Keywords
5G, beam steering, dual-polarized, MIMO, mm-wave, patch antenna, reconfigurable antenna
Other note
Citation
Chen, Q, Laurinaho, J A, Khripkov, A, Ilvonen, J, Moreno, R M & Viikari, V 2023, ' Varactor-based Frequency-reconfigurable Dual-polarized mm-Wave Antenna Array for Mobile Devices ', IEEE Transactions on Antennas and Propagation, vol. 71, no. 8, pp. 6628-6638 . https://doi.org/10.1109/TAP.2023.3287679