Perforated Dielectric Resonator Antenna Reflectarray

─ A wideband perforated rectangular dielectric resonator antenna (RDRA) reflectarray is presented. The arrays of RDRA are formed from one piece of materials. Air-filled holes are drilled into the material around the RDRA. This technique of fabricating RDRA reflectarray using perforations eliminates the need to position and bond individual elements in the reflectarray and makes the fabrication of the RDRA reflectarray feasible. The ground plane below the reflectarray elements is folded as a rectangular concave surface so that an air-gap is formed between the RDRA elements and the ground plane in order to increase the bandwidth. Full-wave analysis using the finite integration technique is applied. Three cases are studied. In the first one, the horn antenna is placed at the focal point to illuminate the reflectarray and the main beam in the broadside direction. In the second one, the horn antenna is placed at the focal point and the main beam at ±30 degrees off broadside direction. In the third one, an offset feed RDRA reflectarray is considered. A variable length RDRA provides the required phase shift at each cell on the reflectarray surface. The normalized gain patterns, the frequency bandwidth, and the aperture efficiency for the above cases are calculated. Index Terms ─ Dielectric resonator, reflectarray, wideband array.

[1]  J. Encinar.  Design of two-layer printed reflectarrays using patches of variable size , 2001 .

[2]  A. A. Mitkees,et al.  X-band linear polarized aperture-coupled DRA reflectarray , 2010, 2010 International Conference on Microwave and Millimeter Wave Technology.

[3]  A. A. Kishk,et al.  Dielectric resonator antenna, a candidate for radar applications , 2003, Proceedings of the 2003 IEEE Radar Conference (Cat. No. 03CH37474).

[4]  A. A. Mitkees,et al.  Design of dielectric resonator reflectarray using full-wave analysis , 2009, 2009 National Radio Science Conference.

[5]  Ahmed A. Kishk,et al.  Experimental investigation for wideband perforated dielectric resonator antenna , 2006 .

[6]  T. Denidni,et al.  Wideband Rectangular Dielectric Resonator Antenna With a Concave Ground Plane , 2009, IEEE Antennas and Wireless Propagation Letters.

[7]  A. Petosa,et al.  Investigation on arrays of perforated dielectric fresnel lenses , 2006 .

[8]  A. Petosa,et al.  Perforated dielectric resonator antennas , 2002 .

[9]  Surface Impedance Boundary Conditions of High Order of Approximation for the Finite Integration Technique , 2007 .

[10]  Ahmed A. Kishk,et al.  Conical dielectric resonator antennas for wide-band applications , 2002 .

[11]  A. Kishk,et al.  Experimental study of broadband embedded dielectric resonator antennas excited by a narrow slot , 2005, IEEE Antennas and Wireless Propagation Letters.

[12]  R. Pogorzelski,et al.  A Ka-band microstrip reflectarray with elements having variable rotation angles , 1998 .

[13]  Array of perforated dielectric resonator antennas , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[14]  Kai Chang,et al.  Design and performance of a microstrip reflectarray antenna , 1995 .

[15]  Stuart A. Long,et al.  The resonant cylindrical dielectric cavity antenna , 1983 .

[16]  Michel Cuhaci,et al.  Reflectarray with variable slots on ground plane , 2003 .

[17]  Ahmed A. Kishk,et al.  Wideband flipped staired pyramid dielectric resonator antennas , 2004 .

[18]  Raphael Gillard,et al.  A new reflectarray cell using microstrip patches loaded with slots , 2005 .

[19]  T. A. Metzler,et al.  Analysis of a reflectarray antenna using microstrip patches of variable size , 1993 .

[20]  J. Huang,et al.  Analysis of a microstrip reflectarray antenna for microspacecraft applications , 1995 .