The use of integrated waveguide structures is very convenient for working in the microwave range (particularly in the THz spectral range).
Geometric Characteristics:
Waveguide core width-585 µm
Taper length (acting as a probe, focusing the radiation pattern)-3500 µm
Distance between perforation centers-165 µm
Taper width at the end-100 µm
Perforation diameter-73 µm
Seliverstov, S., Kozhukhovsky, A., Svyatodukh, S., Goltsman, G. (2024). Terahertz phased array antenna based on integrated taper emitters. Applied Physics Letters, 124(12).
Terahertz photonic integrated circuits and its application.
The course work by A.K. Kozhukhovsky
Kozhukhovsky, A. K., Seliverstov, S. V., Svyatodukh, S. S., Goltsman, G. N. (2024). Terahertz integrated H-plane bend: simulation and experimental investigation.
It is possible to create other waveguide configurations (without perforations). As well as creating bends in the H-plane and more complex designs.
The proposed configuration of the waveguide structures has a high transmission level (loss of approximately -0.1 dB). Furthermore, it has a satisfactory radiation pattern. These characteristics are possessed by most of the configuration: a directional coupler, a straight waveguide, an H-plane bent waveguide, a ring resonator, and a Mach-Zehnder interferometer.
Radiation pattern. a) – E-plane, b) – H-plane
E-mode signal in the core of an H-plane bent waveguide.