Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 62, Issue 5, Pages 2860-2866Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2014.2307343
Keywords
Dual-band antenna; loop-dipole composite antenna; unidirectional antenna
Funding
- National Natural Science Foundation of China [61001079]
- Program for New Century Excellent Talents in University of Ministry of Education of China [NCET-12-0739]
- Jiangsu Natural and Science Foundation of Universities [13KJA510002]
- State Key Laboratory of Millimeter Waves [K201413]
- Nanjing University of Posts & Telecommunications Laboratory Management Foundation
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The design of a novel dual-band loop-dipole composite unidirectional antenna for broadband wireless applications is proposed. First, design guidelines of the antenna are presented, and then, a step-by-step derivation of the antenna geometry is drawn. The antenna's operation principle is analyzed by carrying out parametric studies of surface current distribution, impedance and radiation patterns. The reflection coefficient, radiation patterns and gain of the antenna are numerically and experimentally studied to verify the operation principle and the design approach. It is demonstrated that two pass-bands, from 1.54 to 3.24 and from 4.88 to 6.80 GHz, of reflection coefficient smaller than -10 dB are obtained. The antenna has stable and unidirectional radiation pattern with low cross polarization within its pass-bands. The average gain of the antenna is 6.7 dBi at low frequency band and 6.5 dBi at high frequency band.
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