Toulouse, FRANCE for the financial support. REFERENCES ... 2006, Nice, France, Nov. 2006. [5] H. Kaouach, A. Kabashi ... 1874â1884, Aug. 2012. [9] J. Y. Lau ...
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Abstract & conclusion
Design and characterization of circularlypolarized discrete lens antennas in 60-GHz H. KAOUACH, Senior Member, IEEE TABLE I POWER BUDGET AND GAIN OF THE THREE PROTOTYPES AT 60 GHZ
ABSTRACT Three circularly-polarized discrete lens antennas with different F/D ratios and main beam directions are presented in the V-band. They are fabricated with a standard printed circuit board technology and demonstrate excellent performance with a radiation efficiency of 53-61%, an aperture efficiency of 1528%, a 20-23 dBi gain and a good axial ratio. The typical -1 dB gain- bandwidths are above 12% and the F/D = 0.5 prototype demonstrated a 1 dB axial ratio bandwidth larger than 16.3%. This work is the first demonstration of low-cost discrete lens antennas compatible with high data-rate communications in V-band.
F/D radio
0.25
0.5
Antenna Directivity (dBi)
22.7
25.5
0.5 (beam at 30°) 24.1
Spill-over (dB)
1.72
2.24
2.24
Insertion loss (dB)
0.46
0.46
0.46
Theoretical gain (dB)
20.5
22.8
21.4
20
23
21.9
Radiation efficiency (%)
60.8
53.6
53.7
Aperture efficiency (%)
14.8
28.2
20.4
Axial ratio (dB)
2.36
0.76
0.88
Measured gain (dB)
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Index Terms—Antenna arrays, Transmit-arrays, Unit-cell, Discrete lens, Slot antennas, Millimeter-wave phase shifters, Beam-steering, 60-GHz band.
[2] [3]
[4]
CONCLUSION Three transmit-arrays antennas with circular polarization have been studied numerically and experimentally at 60 GHz. The prototypes have been fabricated using standard printed board technology and materials. Gain levels of 20-23 dBi have been demonstrated with an array aperture of 10λ0×10λ0 and a 10 dBi linearly-polarized focal source. The power efficiency is in the range 53-61%. The large gain and axial ratio bandwidths make these designs very appropriate for high-data rate communications and radar applications at millimeter-wave frequencies.
[5]
[6]
[7]
[8]
[9]
[10]
ACKNOWLEDGMENTS [11]
The author would like to thank CEA, Grenoble and CNES, Toulouse, FRANCE for the financial support.
[12]
[13]
[14]
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