A tapered CRLH mushroom-like leaky wave antenna with reduced sidelobe level

A tapered composite right/left-handed (CRLH) leaky-wave antenna (LWA) with reduced sidelobe level (SLL) is presented. A cosine taper design is achieved by simultaneously modifying the longitudinal period and the slot width of the mushroom CRLH structure. The design methodology is based on the use of parametric curves relating the phase and radiation constant of a single unit cell with diverse geometrical parameters. The radiation pattern results of the proposed structure show a significant SLL reduction in comparison with a non-tapered mushroom-like CRLH LWA, demonstrating the validity of the design methodology.

[1]  R. King,et al.  The synthesis of surface reactance using an artificial dielectric , 1983 .

[2]  A. Oliner,et al.  Microstrip leaky wave strip antennas , 1986, 1986 Antennas and Propagation Society International Symposium.

[3]  K. Solbach,et al.  Transmission Line Modeling and Asymptotic Formulas for Periodic Leaky-Wave Antennas Scanning Through Broadside , 2011, IEEE Transactions on Antennas and Propagation.

[4]  A. Alvarez-Melcon,et al.  A Simple CRLH LWA Circuit Condition for Constant Radiation Rate , 2011, IEEE Antennas and Wireless Propagation Letters.

[5]  Tatsuo Itoh,et al.  Electromagnetic metamaterials : transmission line theory and microwave applications : the engineering approach , 2005 .

[6]  Alejandro Álvarez Melcón,et al.  A Modal-Based Iterative Circuit Model for the Analysis of CRLH Leaky-Wave Antennas Comprising Periodically Loaded PPW , 2011, IEEE Transactions on Antennas and Propagation.

[7]  A. Krauss,et al.  A dual-band circularly-polarised leaky-wave antenna for mobile Ka-band satellite communications , 2011, 2011 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications.

[8]  D. Jackson,et al.  Leaky‐Wave Antennas , 2008 .

[9]  A. Alvarez-Melcon,et al.  Radiation Characteristics of Mushroom-Like PPW LWAs: Analysis and Experimental Verification , 2011, IEEE Antennas and Wireless Propagation Letters.

[10]  Alejandro Alvarez-Melcon,et al.  Analysis of the radiation characteristics of CRLH LWAs around broadside , 2012, 2012 6th European Conference on Antennas and Propagation (EUCAP).

[11]  G. Goussetis,et al.  Holographic Pattern Synthesis With Modulated Substrate Integrated Waveguide Line-Source Leaky-Wave Antennas , 2013, IEEE Transactions on Antennas and Propagation.

[12]  Etienne Perret,et al.  A Tapered CRLH Interdigital/Stub Leaky-Wave Antenna With Minimized Sidelobe Levels , 2012, IEEE Antennas and Wireless Propagation Letters.

[13]  Tatsuo Itoh,et al.  Dominant mode leaky-wave antenna with backfire-to-endfire scanning capability , 2002 .

[14]  A. Alvarez-Melcon,et al.  Design of tapered leaky-wave antennas in hybrid waveguide-planar technology for millimeter waveband applications , 2005, IEEE Transactions on Antennas and Propagation.