Composite right/left‐handed coplanar waveguide feeding array of slot antennas

In this article, a new composite right/left-handed (CRLH) antenna is proposed. The antenna is implemented by cascading dual-function coplanar waveguide coupled line CRLH unit cells. The proposed antenna has continuous backward to forward radiation. The scanning angle, radiated power and directivity increase as the number of cells increases. For nine cells, the scanning angle is 77°, the radiated power is 75%, the peak directivity is 4.2, and the total length is smaller than λ0. The circuit and EM simulations have been confirmed by measurements. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:103–107, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26483

[1]  C. Caloz,et al.  Dual composite right/left‐handed (D‐CRLH) leaky‐wave antenna with low beam squinting and tunable group velocity , 2007 .

[2]  C Caloz,et al.  Power-Recycling Feedback System for Maximization of Leaky-Wave Antennas' Radiation Efficiency , 2010, IEEE Transactions on Microwave Theory and Techniques.

[3]  A. Oliner.  A periodic-structure negative-refractive-index medium without resonant elements , 2002 .

[4]  K.-K.M. Cheng.  Analysis and synthesis of coplanar coupled lines on substrates of finite thicknesses , 1996 .

[5]  Kapil R. Dandekar,et al.  Two port reconfigurable CRLH leaky wave antenna with improved impedance matching and beam tuning , 2009, 2009 3rd European Conference on Antennas and Propagation.

[6]  Hadia El-Hennawy,et al.  On the Applications of the Coupled-Line Composite Right/Left-Handed Unit Cell , 2010, IEEE Transactions on Microwave Theory and Techniques.

[7]  C. Caloz,et al.  Dual Composite Right/Left-Handed (D-CRLH) Transmission Line Metamaterial , 2006, IEEE Microwave and Wireless Components Letters.

[8]  A. Safwat,et al.  Microstrip Coupled Line Composite Right/Left-Handed Unit Cell , 2009, IEEE Microwave and Wireless Components Letters.

[9]  A. Grbic,et al.  Leaky CPW-based slot antenna arrays for millimeter-wave applications , 2002 .

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

[11]  G. Eleftheriades,et al.  A CPS Leaky-Wave Antenna With Reduced Beam Squinting Using NRI-TL Metamaterials , 2008, IEEE Transactions on Antennas and Propagation.

[12]  T. Itoh,et al.  Application of the transmission line theory of left-handed (LH) materials to the realization of a microstrip "LH line" , 2002, IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313).