A Circularly Polarized High-Gain Planar 2 × 2 Dipole-Array Antenna Fed by a 4-Way Gysel Power Divider for WLAN Applications

In this letter, a circularly polarized high-gain planar 2 × 2 dipole-array antenna for wireless local area networks, radio frequency identification, radar, and satellite communication applications is proposed. The proposed array antenna consists of four planar dipole antennas with integrated microst...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2019-05, Vol.18 (5), p.1051-1055
Main Authors: Kim, Sangkil, Kim, Jeong-Il
Format: Article
Language:English
Subjects:
Antenna arrays
Antenna gain
Broadband antennas
Circular polarization
Circular polarized (CP) antenna
Dipole antennas
dipole-array antenna
Frequencies
Gysel power divider
high gain
integrated balun
Local area networks
Microstrip
Microstrip antennas
Power dividers
Radio frequency
Radio frequency identification
Reflector antennas
Satellite communications
Substrates
Wireless networks
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Summary:In this letter, a circularly polarized high-gain planar 2 × 2 dipole-array antenna for wireless local area networks, radio frequency identification, radar, and satellite communication applications is proposed. The proposed array antenna consists of four planar dipole antennas with integrated microstrip-to-parallel-stripline linear tapered balun and feeding network. The designed array antenna is fed by a modified 4-way Gysel power divider. The proposed antenna uses three stacked metal layers, and a metal reflector under the antenna boosts the overall antenna gain. The size of the designed antenna on 3.2 mm thick FR4 substrate was 150 mm × 150 mm × 20 mm including the reflector. The designed antenna had left-hand circular polarization (LHCP), and its measured LHCP gain value was 8.70-9.62 dBic at 2.4-2.6 GHz band. The measured axial ratio was 0.3-2.2 dB at the same frequency band of interest. A thorough theoretical analysis and design equations of the proposed array antenna are presented in this letter.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2019.2909041