High-Performance Radiation Design of a Planar Bow-tie Antenna Combined with a Dielectric Lens and Cascaded Matching Layers at Terahertz Frequency

Abstract

The demand for high-speed data transmission has increased significantly in the last decades. Terahertz (THz) frequencies, which lie between 100 GHz to 10 THz, have been considered to be the solution to the demand. However, the low gain and low efficiency of a THz antenna remain issues that hinder reasonable performance for various applications. This paper proposes the design of a high-gain and high-efficiency planar bow-tie antenna for applications using THz frequencies. A planar bow-tie on a high-resistivity silicon substrate is considered in order to obtain broadband characteristics. To increase gain and efficiency, a dielectric silicon lens and a matching layer based on the quarter-wavelength are applied in the design. From simulations using Computer Simulation Technology (CST) Microwave Studio, gain and radiation efficiency of up to 32.69 dB and 90.4% are obtained, respectively. This proposed design has shown high radiation performance suitable for high-speed transmission systems.

An Ultralight High-Directivity Ceramic Composite Lens Antenna for 220–330 GHz

“…the highest reflectivity. This issue with high reflectivity with high permittivity materials has been addressed with matching layers which raises the complexity of the lens [34], [35]. With low permittivity materials there is no need to take such a complicated approach in the lens design and fabrication.…”

Ultrawideband planar bow‐tie with curved directive strips for gain enhancement

“…Previous work has explored the addition of passive and active elements as a means to increasing gain. Lensing together with a capacitive bar was employed to increase efficiency and gain of a bow‐tie antenna designed for THz frequencies . A bow‐tie with a backing cavity successfully demonstrated enhanced unidirectional gain .…”

“…Lensing together with a capacitive bar was employed to increase efficiency and gain of a bow-tie antenna designed for THz frequencies. 8 A bow-tie with a backing cavity successfully demonstrated enhanced unidirectional gain. 9 Increased endfire gain of the bow-tie was achieved using a V-shaped dipole director with a bandwidth of 1 GHz.…”