Optimal Design of Focused Antenna Arrays

In this paper, we propose an optimal design procedure for the focused antenna array based on the maximization of power transmission efficiency between two antennas. In the optimization process, the focused antenna array to be designed is used as the transmitting antenna and a testing antenna is used as the receiving antenna, positioned in a desired area to be focused. An optimal excitation distribution can thus be obtained for the antenna array to be focused in the desired area. Three 4 × 4 microstrip patch arrays with different focusing distances are designed to validate the optimization technique and demonstrate the focusing capabilities when the antenna array size is fixed. A 6 × 6 microstrip patch array is also built to reveal how the antenna size enhances the focusing effect.

[1]  Wen Geyi.  Foundations of Applied Electrodynamics , 2010 .

[2]  Wen Geyi.  Foundations of Applied Electrodynamics: Geyi/Foundations of Applied Electrodynamics , 2010 .

[3]  Kin-Lu Wong,et al.  Small broadband rectangular microstrip antenna with chip-resistor loading , 1997 .

[4]  J. Sherman.  Properties of focused apertures in the fresnel region , 1962 .

[5]  A. G. Williamson,et al.  Antenna array with beam focused in near-field zone , 2003 .

[6]  J. Loane,et al.  Gain optimization of a near-field focusing array for hyperthermia applications , 1989 .

[7]  Guo-Min Yang,et al.  Optimal Design of an Antenna Array for Energy Harvesting , 2013, IEEE Antennas and Wireless Propagation Letters.

[8]  L. Poli,et al.  Maximum Efficiency Beam Synthesis of Radiating Planar Arrays for Wireless Power Transmission , 2013, IEEE Transactions on Antennas and Propagation.

[9]  J.-D. Lan Sun Luk,et al.  Modelling and simulation of a complete system of energy transmission , 2006, 2006 IEEE Antennas and Propagation Society International Symposium.

[10]  Shaya Karimkashi,et al.  Focusing Properties of Fresnel Zone Plate Lens Antennas in the Near-Field Region , 2011, IEEE Transactions on Antennas and Propagation.

[11]  William C. Brown,et al.  Beamed microwave power transmission and its application to space , 1992 .

[12]  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.

[13]  F. E. Little,et al.  An in-space wireless energy transmission experiment , 1996, IECEC 96. Proceedings of the 31st Intersociety Energy Conversion Engineering Conference.

[14]  J. C. Mankins,et al.  Space solar power programs and microwave wireless power transmission technology , 2002 .

[15]  K. Hynynen,et al.  The feasibility of using electrically focused ultrasound arrays to induce deep hyperthermia via body cavities , 1991, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[16]  F. Schwering,et al.  On the guided propagation of electromagnetic wave beams , 1961 .

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

[18]  W. Graham.  Analysis and synthesis of axial field patterns of focused apertures , 1983 .

[19]  S. Karimkashi,et al.  Focused Microstrip Array Antenna Using a Dolph-Chebyshev Near-Field Design , 2009, IEEE Transactions on Antennas and Propagation.

[20]  A. Kay,et al.  Near-field gain of aperture antennas , 1960 .

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

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

[23]  G. Borgiotti.  Maximum power transfer between two planar apertures in the Fresnel zone , 1966 .

[24]  Yu-Cheng Huang,et al.  Design of RFID near-field focusing circular patch array antenna at 2.4GHz with applications , 2010, 2010 Internet of Things (IOT).

[25]  Federico Viani,et al.  Array Designs for Long-Distance Wireless Power Transmission: State-of-the-Art and Innovative Solutions , 2013, Proceedings of the IEEE.

[26]  Kai Chang,et al.  5.8-GHz circularly polarized rectifying antenna for wireless microwave power transmission , 2002 .