A High-Power Microwave Zoom Antenna With Metal-Plate Lenses

Metal-plate lens antennas were designed and constructed for a high-power microwave zoom antenna concept comprising a pyramidal horn feed antenna and two metal-plate lenses. Good agreement was found between experiment and simulation. This antenna provides true zoom capability with continuously variable collimated beam output, approximately 10% bandwidth, and very high power-handling capability. It can be designed to operate at any frequency in the range of about 100 MHz to 10 GHz. It was found that nano-modified carbon fiber composites could be used instead of metal plates in these lenses; these composites would reduce the weight of the lens significantly and would help to mitigate possible spurious TM modes induced in the lens when it is in the near-field of the feed horn antenna.

[1]  C. Christodoulou,et al.  A high power microwave zoom antenna with metal plate lenses , 2015, 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI).

[2]  K. Ghorbani,et al.  Analysis of a carbon fibre reinforced polymer slotted waveguide array fed by a loop type end launcher , 2013, 2013 Asia-Pacific Microwave Conference Proceedings (APMC).

[3]  James R. Scott,et al.  The reflectivity of carbon fiber reinforced polymer short circuit illuminated by guided microwaves , 2013 .

[4]  Julie Bentley,et al.  Field guide to lens design , 2012 .

[5]  K. Ghorbani,et al.  The anisotropic conductivity of unidirectional carbon fibre reinforced polymer laminates and its effect on microstrip antennas , 2010, 2010 Asia-Pacific Microwave Conference.

[6]  M. S. Sarto,et al.  Analyzing carbon-fiber composite materials with equivalent-Layer models , 2005, IEEE Transactions on Electromagnetic Compatibility.

[7]  Charles M. Lieber,et al.  Probing Electrical Transport in Nanomaterials: Conductivity of Individual Carbon Nanotubes , 1996, Science.

[8]  A. Walther,et al.  The Ray and Wave Theory of Lenses: Geometrical optics , 1995 .

[9]  R. Kaul,et al.  Microwave engineering , 1989, IEEE Potentials.

[10]  Carlyle J. Sletten,et al.  Reflector and Lens Antennas: Analysis and Design Using Personal Computers , 1988 .

[11]  W. Burnside,et al.  An aperture-matched horn design , 1980 .

[12]  R. Schmidt,et al.  Variable-beamwidth antenna without moving parts , 1975 .

[13]  M. Teichman.  Determination of Horn Antenna Phase Centers by Edge Diffraction Theory , 1973, IEEE Transactions on Aerospace and Electronic Systems.

[14]  A. Farrar,et al.  REFLECTOR ANTENNA ZOOM TECHNIQUES. , 1967 .

[15]  W. E. Kock,et al.  Metal-Lens Antennas , 1946, Proceedings of the IRE.

[16]  M. J. Akhtar,et al.  A Multi-Layered Waveguide Technique for Determining Permittivity and Conductivity of Composite Materials , 2005 .

[17]  Ho Gyu Yoon,et al.  Electrical conductivity of chemically modified multiwalled carbon nanotube/epoxy composites , 2005 .

[18]  C. Baum,et al.  Impulse Radiating Antennas , 1993 .

[19]  J. D. Krauss.  Antennas For All Applications , 1950 .

[20]  S. Silver.  Microwave antenna theory and design , 1949 .