A Wideband High-gain Terahertz Antenna Based on the Open Resonator
DescriptionTerahertz electromagnetic waves, which can provide tremendous amount of frequency bandwidth for high speed wireless communication systems and high resolution in imaging and sensing applications have attracted much attention in both industry and academia over the past decade. Due to the success in developing terahertz and measuring equipment, high performance and low cost terahertz antennas are increasingly in demand. Since the output power of the evolving terahertz sources cannot be very high in the foreseeable future, high gain antennas are required to increase the distance of communications. Conventional approaches employing reflector antennas or antenna arrays for achieving high gain performance are not suitable for terahertz applications as the physical sizes of these antennas will be too small to be realized by common fabrication techniques. The lens antennas together with the feed is bulky in structure. In this project, the technique of using a leaky open resonator, consisting of a spherical concave metallic mirror and a 3D-printed dielectric slab with metallized patches or grid, to generate a Gaussian beam of radiation is employed to develop high gain antennas operated at terahertz frequencies, with different polarization of radiation. As the structure of the antenna is very simple and robust, it can be constructed by polymer 3D-printing technique. RF spluttering is employed to metallize the surfaces of the polymer with patches and concave mirror. Also, due to the possibility of generating multiple Laguerre Gaussian beam modes in the leaky open resonator, this class of novel antennas will not only high in antenna gain, but also wide in bandwidth and low in side lobe levels, which is attractive for future terahertz systems.
|Effective start/end date||1/01/20 → …|