A Miniaturized Half-Coplanar Waveguide CRLH Leaky Wave Antenna for Millimeter-Wave Applications

In this letter, a novel planar microstrip composite right/left handed leaky wave antenna (CRLH L W A), metamaterial inspiration, with full-space radiation beam scanning capability for millimeter-wave application is designed and simulated. The antenna is designed on half-coplanar waveguide technology and it is responsible for miniaturized dimensions, elliptical polarization, high efficiency, as well as continuous space scanning. According to symmetry/asymmetry of periodic L W A theorem, and owing to breaking the longitudinal symmetry of coplanar waveguide, these significant features are available. It is shown by the dispersion diagram approach that the proposed L W A is able to radiate forward, broadside and backward leaky wave radiation. The unit cell of this structure consists of a pair of identical interdigital capacitors (IDCs) that is located on Silicon and Silicon oxide substrate. This CRLH L W A operates in Q band. Full-wave Agilent ADS Momentum software is adopted for the simulation. It is revealed by the investigations that the proposed antenna array with 10 cells can scan the space through broadside from the -52 degree to +58 degree in phi=0 degree plane.