Title :
2-D periodic leaky-wave Antennas-part II: slot design
Author :
Zhao, Tianxia ; Jackson, David R. ; Williams, Jeffery T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Houston, TX, USA
Abstract :
The far-field radiation patterns of a two-dimensional (2-D) periodic slot leaky-wave antenna (LWA) are studied. The antenna consists of a two-dimensional periodic array of slots in a conducting plane that is printed on top of a grounded dielectric slab. The antenna is excited by a simple source such as a dipole inside the slab. Reciprocity along with the spectral-domain method is used to calculate the far-field pattern, and the radiation characteristics of the structure are investigated. A comparison between the present periodic slot LWA and a 2-D periodic patch LWA discussed in Part I is given to show the advantages of the slot antenna for certain applications. The slot LWA can achieve high directivity patterns, and a circularly-polarized version of the antenna can achieve good circular-polarization at broadside.
Keywords :
antenna radiation patterns; conducting bodies; dielectric bodies; directive antennas; electromagnetic wave polarisation; leaky wave antennas; periodic structures; slot antenna arrays; spectral-domain analysis; LWA; circular polarization; conducting plane; directivity pattern; far-field radiation pattern; grounded dielectric slab; slot array antenna; source excitation; spectral-domain method; two-dimensional periodic leaky-wave antenna; Antenna arrays; Antenna radiation patterns; Dielectric substrates; Dipole antennas; Leaky wave antennas; Microstrip antennas; Periodic structures; Slabs; Slot antennas; Structural beams; Circular polarization; leaky-wave antenna (LWA); slots;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2005.858580
