Planar Leaky-Wave Antenna Designs Offering Conical-Sector Beam Scanning and Broadside Radiation Using Surface-Wave Launchers

Two planar antenna designs that utilize surface-waves for leaky-wave excitation are investigated. Specifically, a surface-wave launcher is implemented to excite cylindrical surface-waves, which are bound to a grounded dielectric slab. By the addition of circular metallic strip gratings, a partially reflecting surface is realized, providing appropriate conditions for 2-D leaky-wave radiation. In particular, two designs are investigated: a continuous circular strip and a segmented circular strip grating. Results illustrate conical-sector beam scanning for the continuous circular strip grating between 2022 GHz, while broadside radiation is observed at 21.2 GHz by the segmented circular strip design.

[1]  D. Jackson,et al.  Microstrip dipoles on electrically thick substrates , 1986 .

[2]  Y. Antar,et al.  Uni-planar CPW-fed slot launchers for efficient TM/sub 0/ surface-wave excitation , 2003 .

[3]  H. Kalhor.  Electromagnetic scattering by a dielectric slab loaded with a periodic array of strips over a ground plane , 1988 .

[4]  G. Lovat,et al.  A novel printed leaky-wave 'bull-eye' antenna with suppressed surface-wave excitation , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[5]  David R. Jackson,et al.  Radiation from cylindrical leaky waves , 1990 .

[6]  M. Sayer,et al.  A new dielectric grating antenna at millimeter wave frequency , 2004, IEEE Transactions on Antennas and Propagation.

[7]  D. Jackson,et al.  Analysis and Optimization of Leaky-Wave Radiation at Broadside From a Class of 1-D Periodic Structures , 2006, IEEE Transactions on Antennas and Propagation.

[8]  D. Jackson,et al.  Theory of line-source radiation from a metal-strip grating dielectric-slab structure , 1997, IEEE Antennas and Propagation Society International Symposium 1997. Digest.

[9]  Marco Guglielmi,et al.  Multimode network description of a planar periodic metal-strip grating at a dielectric interface. I - Rigorous network formulations. II - Small-aperture and small-obstacle solutions , 1989 .

[10]  D. Jackson,et al.  General formulas for 2-D leaky-wave antennas , 2005, IEEE Transactions on Antennas and Propagation.

[11]  G. Lovat,et al.  Fundamental properties and optimization of broadside radiation from uniform leaky-wave antennas , 2006, IEEE Transactions on Antennas and Propagation.

[12]  D. Jackson,et al.  Surface-wave band gaps and leaky modes on integrated circuit structures with planar periodic metallic elements , 2000, IEEE MTT-S International Microwave Symposium Digest.

[13]  R. Elliott.  Antenna Theory and Design , 2003 .

[14]  D. Sievenpiper,et al.  High-impedance electromagnetic surfaces with a forbidden frequency band , 1999 .

[15]  G. Gerini,et al.  Planar circularly symmetric EBG structures for reducing surface waves in printed antennas , 2005, IEEE Transactions on Antennas and Propagation.

[16]  A.P. Freundorfer,et al.  Theoretical considerations in the optimization of surface waves on a planar structure , 2004, IEEE Transactions on Antennas and Propagation.