Frequency-Reconfigurable Low-Profile Circular Monopolar Patch Antenna
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 6800019 |
Pages (from-to) | 3443-3449 |
Journal / Publication | IEEE Transactions on Antennas and Propagation |
Volume | 62 |
Issue number | 7 |
Online published | 17 Apr 2014 |
Publication status | Published - Jul 2014 |
Link(s)
Abstract
A novel frequency-reconfigurable antenna is presented based on a circular monopolar patch antenna. The antenna comprises of a center-fed circular patch surrounded by four sector-shaped patches. Eight varactor diodes are introduced to bridge the gaps between the circular patch and the sector-shaped patches. By changing the reverse bias voltage of the varactor diodes, the antenna can be switched in the operating frequency. A fully functional prototype is developed and tested, which exhibits a continuously tunable frequency band from 1.64 GHz to 2.12 GHz. The measured efficiency rises from about 45% to about 85% as the operating frequency increases from 1.64 GHz to 2.12 GHz. Stable monopole like radiation patterns are achieved at all operating frequencies. In addition, the antenna owns a low-profile structure (0.04 free-space wavelengths at 1.9 GHz). The frequency selective feature and stable radiation patterns make the antenna potentially suitable for future wireless communication systems, such as cognitive radio.
Research Area(s)
- Cognitive radio, frequency-reconfigurable antenna, monopolar patch antenna, varactor diode
Citation Format(s)
Frequency-Reconfigurable Low-Profile Circular Monopolar Patch Antenna. / Ge, Lei; Luk, Kwai-Man.
In: IEEE Transactions on Antennas and Propagation, Vol. 62, No. 7, 6800019, 07.2014, p. 3443-3449.
In: IEEE Transactions on Antennas and Propagation, Vol. 62, No. 7, 6800019, 07.2014, p. 3443-3449.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review