Nonreciprocal and magnetically scanned leaky-wave antenna using coupled CRLH lines

A new class of magnetoelectrics-based leaky-wave antennas (LWA) is proposed for wide angle beam-steering via magnetic tuning. This new LWA is based on coupled composite-right-left-handed microstrip lines printed on a ferrite substrate. To accomplish radiation, the printed coupled transmission lines are operated in the fast wave region (|β|<;k
₀
). Beam-steering was attained by changing the magnetic properties of the ferrite, controlled by the external bias field. Specifically, the beam was successfully scanned in the E-plane by 80° via changing the bias field by ±50Oe. The associated gain varies between 3.5dB and 5dB at the operating frequency 1.85 GHz as the beam is scanned.