A Novel Conformal Quasi-Yagi Antenna With Offset Feed for High Directional 300GHz Applications

Abstract

This communication reports a conformal offset feed Quasi-Yagi antenna at 300 GHz for high-directional applications. A novel offset feed mechanism is adopted to obtain directional behavior from a conventional planar structure. The proposed antenna is designed on a Silicon-dioxide (SiO 2 ) dielectric substrate having a permittivity (ε r ) of 4 and a height of 60μm. A gold material of thickness 5µm is used as a conducting metal in the top and bottom layers. This antenna consists of an offset feed patch, partial ground as a reflector, and three director elements forming a Quasi-Yagi antenna. This conformal structure operates from 270 GHz to 333 GHz and provides a peak gain of 8.62dBi at 300 GHz in the end-fire direction. An analysis of different metals and parametric variation in metal thickness, substrate thickness, patch length, and width is also reported for a better understanding of the evolution of the proposed structure. A lumped equivalent circuit is also developed for the proposed structure to study its transmission line model. A good agreement is also noted between the EM simulation (HFSS, CST) and circuit simulation (ADS).

Printed Dual‐Frequency Directional Antenna Loaded With Dual‐Parasitic Strip

“…In addition, the end‐fire antenna element is a good solution for designing high‐gain directional antennas (Fezai et al., 2013; Nella et al., 2023; Rooyen et al., 2017). However, the occupied area is large size since the reflector element is longer than the other elements and space between elements.…”