Polarization-Reconfigurable Yagi-Configured Electrically Small Antenna.
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| Title: | Polarization-Reconfigurable Yagi-Configured Electrically Small Antenna. |
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| Authors: | Tang, Ming-Chun1 tangmingchun@cqu.edu.cn, Lin, Qingli1, Li, Mei1, Ziolkowski, Richard W.2 richard.ziolkowski@uts.edu.au |
| Source: | IEEE Transactions on Antennas & Propagation. Mar2021, Vol. 69 Issue 3, p1757-1762. 6p. |
| Subjects: | Antennas (Electronics), PIN diodes, Linear polarization, Circular polarization, Personal identification numbers, Coaxial cables |
| Abstract: | An electrically small, high-directivity, Yagi-configured, near-field resonant parasitic (NFRP) antenna with four reconfigurable polarization states is presented. The antenna is composed of two NFRP elements and a customized, electrically controlled, reconfigurable driven element. The elements are stacked vertically in a Yagi configuration. The upper NFRP element acts as the director, and the lower one acts as the reflector. Both elements have a cross-shaped Egyptian axe dipole form. By integrating four p-i-n (PIN) diodes into its coax-fed asymmetric driven element, four polarization states, i.e., two orthogonal linear polarization (LP) and two circular polarization (LHCP and RHCP), are enabled which are controlled with the ON/OFF-states of the PIN diodes. The measured and simulated results of this electrically small ($ka = 0.7$) sized polarization-reconfigurable system are in good agreement. This simple, Yagi-configured antenna exhibits stable radiation performance in all four of its polarization states. The measured results demonstrate that, in its $x$ ($y$)-LP state, the peak realized gain, front-to-back ratio, and radiation efficiency values are, respectively, ~3.08 (3.2) dBi, ~11.0 (11.05) dB, and ~77% (73%), and that, in its LHCP (RHCP) state, they are, respectively, ~3.0 (3.1) dBi, ~12.1 (11.18) dB, and ~72% (70%). [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
| Abstract: | An electrically small, high-directivity, Yagi-configured, near-field resonant parasitic (NFRP) antenna with four reconfigurable polarization states is presented. The antenna is composed of two NFRP elements and a customized, electrically controlled, reconfigurable driven element. The elements are stacked vertically in a Yagi configuration. The upper NFRP element acts as the director, and the lower one acts as the reflector. Both elements have a cross-shaped Egyptian axe dipole form. By integrating four p-i-n (PIN) diodes into its coax-fed asymmetric driven element, four polarization states, i.e., two orthogonal linear polarization (LP) and two circular polarization (LHCP and RHCP), are enabled which are controlled with the ON/OFF-states of the PIN diodes. The measured and simulated results of this electrically small ($ka = 0.7$) sized polarization-reconfigurable system are in good agreement. This simple, Yagi-configured antenna exhibits stable radiation performance in all four of its polarization states. The measured results demonstrate that, in its $x$ ($y$)-LP state, the peak realized gain, front-to-back ratio, and radiation efficiency values are, respectively, ~3.08 (3.2) dBi, ~11.0 (11.05) dB, and ~77% (73%), and that, in its LHCP (RHCP) state, they are, respectively, ~3.0 (3.1) dBi, ~12.1 (11.18) dB, and ~72% (70%). [ABSTRACT FROM AUTHOR] |
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| ISSN: | 0018926X |
| DOI: | 10.1109/TAP.2020.3018554 |
