Bespoke lens design for a millimeter-wave leaky-wave antenna with fixed frequency beam-steering

Dielectric lenses such as graded index and homogenous convex lenses are popularly used to focus the electromagnetic energy and hence, generate a highly directional beam. However, most of the literature has been limited to lens design for standing wave antennas. Recently, new bespoke lenses have been presented in the literature to focus the beam from travelling wave antennas (TWAs). This paper validates the lens design theory for TWAs for a stubbed leaky-wave antenna design operating at a frequency band of 26 - 28.5 GHz. Additionally, the proposed design presents a fixed frequency beam-steering nature with the change in position of the antenna with respect to the lens. The proposed work shows a peak gain of 22 dBi with a beam-steering capability of ± 35°.<p></p>