Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 20, Issue 12, Pages 2309-2313Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2021.3109616
Keywords
Antenna measurements; Wireless communication; RF signals; Prototypes; Switches; Solids; Dielectric resonator antennas; Dielectric resonator antenna (DRA); p-i-n diodes; polarizations; radiation patterns; reconfigurable antenna
Funding
- Research Grants Council of Hong Kong Special Administrative Region, China [CityU 11218020]
- Fundamental Research Program of Shenzhen City [JCYJ20170818094814530]
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The pattern- and polarization-reconfigurable dielectric resonator antenna demonstrated the ability to switch between different radiation patterns and polarizations by adjusting the height-to-radius ratio and phase distributions in the feeding network slots. Through prototyping and testing, the design's feasibility was confirmed with good efficiency in the frequency band of interest.
A pattern- and polarization-reconfigurable dielectric resonator antenna (DRA) is presented. It deploys a conventional cylindrical dielectric resonator (DR) with a new switchable feeding network. The feeding network has four slots that are etched in the ground. By tuning the phase distributions in these slots, three DR modes (the TM01 delta and two degenerated HEM113 modes) are excited. The former has an omnidirectional radiation pattern, whereas the latter two have boresight patterns with orthogonal polarizations (x- and y-polarization). By tuning the height-to-radius ratio, these modes can be designed to operate at the same frequency, thus enabling both the pattern and polarization reconfigurability. A prototype of the reconfigurable DRA working in 2.4 GHz is fabricated and measured to verify ideas. Reasonable agreement between measurements and simulations is obtained. Our design provides both pattern and polarization reconfigurability, with good efficiency in the band of interest.
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