Multi-focus transmitarray antenna in near/far field design

In this paper, the design of single-focused and multi-focused transmitarray antennas in the near-field (NF) or/and far-field (FF) applications are proposed. A unit-cell element consists of a dielectric square box with four identical holes is used. The phase compensation of the unit-cell element depends on changing the hole radii according to the position of the unit-cell, the feeding horn, and the beam direction. The radiation characteristics of 13×13 unit-cell elements transmitarray antenna focused in the near- and the far-field regions are investigated. A single structure multi-focused transmitarray is designed using a chess-board arrangement of the unit-cell elements. Multi-focused transmitarray antennas for FF/FF, FF/NF, and NF/NF are designed and investigated. The phase distributions and the corresponding hole radii for different configurations of the multi-focused transmitarray antennas are presented. The radiation characteristics of different array configurations are investigated and analyzed using a full-wave simulator CST Microwave Studio.

[1]  L. Ukkonen,et al.  UHF RFID Reader Antenna for Near-Field and Far-Field Operations , 2011, IEEE Antennas and Wireless Propagation Letters.

[2]  Wei Hong,et al.  Discrete Dielectric Reflectarray and Lens for E-Band With Different Feed , 2014, IEEE Antennas and Wireless Propagation Letters.

[3]  Hend Abd El-Azem Malhat,et al.  8×8 Near-Field Focused Circularly Polarized Cylindrical DRA Array for RFID Applications , 2012 .

[4]  Smail Tedjini,et al.  Near field focusing circular microstrip antenna array for RFID applications , 2009, 2009 IEEE Antennas and Propagation Society International Symposium.

[5]  Gabriel M. Rebeiz,et al.  Highly dense microwave and millimeter-wave phased array T/R modules and Butler matrices using CMOS and SiGe RFICs , 2010, 2010 IEEE International Symposium on Phased Array Systems and Technology.

[6]  J. Venter,et al.  Outcomes and complications of a multifocal toric intraocular lens with a surface‐embedded near section , 2013, Journal of cataract and refractive surgery.

[7]  S. M. Gaber,et al.  Cylindrical perforated transmitarrays , 2012, The 2nd Middle East Conference on Antennas and Propagation.

[8]  Okan Yurduseven,et al.  Compact parabolic reflector antenna design with cosecant-squared radiation pattern , 2011, 2011 MICROWAVES, RADAR AND REMOTE SENSING SYMPOSIUM.

[9]  J. Mead,et al.  A Near Field Focused Microstrip Array for a Radiometric Temperature Sensor , 2007, IEEE Transactions on Antennas and Propagation.

[10]  A. Buffi,et al.  Design Criteria for Near-Field-Focused Planar Arrays , 2012, IEEE Antennas and Propagation Magazine.

[11]  Javad Nourinia,et al.  Near-Field Focused Array Microstrip Planar Antenna for Medical Applications , 2014, IEEE Antennas and Wireless Propagation Letters.

[12]  S. Hum,et al.  A Wideband Reconfigurable Transmitarray Element , 2012, IEEE Transactions on Antennas and Propagation.

[13]  H. Malhat,et al.  Radiation Characteristics Enhancement of Dielectric Resonator Antenna Using Solid/Discrete Dielectric Lenses , 2015 .

[14]  Laurent Dussopt,et al.  Circularly-polarized discrete lens antennas in the 60-GHz band , 2010, 2010 Conference Proceedings ICECom, 20th International Conference on Applied Electromagnetics and Communications.

[15]  K. H. Awadalla,et al.  Reflectarrays mounted on or embedded in cylindrical or spherical surfaces , 2012, The 2nd Middle East Conference on Antennas and Propagation.

[16]  H. Malhat,et al.  B1. Investigation into the effects of solar cells on the DRA reflectarray / transmitarray antenna design , 2015, 2015 32nd National Radio Science Conference (NRSC).

[17]  Smail Tedjini,et al.  Tunable Near-Field Focused Circular Phase-Array Antenna for 5.8-GHz RFID Applications , 2011, IEEE Antennas and Wireless Propagation Letters.

[18]  R. Hansen,et al.  Focal region characteristics of focused array antennas , 1985 .

[19]  Alice Buffi,et al.  Near field focused microstrip arrays for gate access control systems , 2009, 2009 IEEE Antennas and Propagation Society International Symposium.

[20]  K. H. Awadalla,et al.  Perforated transmitarray-enhanced circularly polarized antennas for high-gain multi-beam radiation , 2013, 2013 Proceedings of the International Symposium on Antennas & Propagation.

[21]  Allan G. Williamson,et al.  Microstrip Antenna Array With a Beam Focused in the Near-Field Zone for Application in Noncontact Microwave Industrial Inspection , 2007, IEEE Transactions on Instrumentation and Measurement.

[23]  Atef Z. Elsherbeni,et al.  Analysis and design of wideband transmitarray antennas with different unit-cell phase ranges , 2014, 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI).

[24]  Flat Far Field Lenses and Re∞ectors , 2014 .