Research And Design Of Terahertz Antenna Based On Artificial Vision Technology

Scientific development has brought great convenience to mankind in the21st century. Patients with visual disability and blind people cannot fully enjoy the visual perception of the world or live a better life due to their visual impairment. Visual disorders do not simply bring hardships to those related families but also hurt souls. Applying the growing development of terahertz antenna technology to artificial vision repair system brings hope to those who are suffering. This means significant social value and broad application prospects. In order to combine terahertz antenna technology with artificial vision repair system, this thesis mainly studied contents below:1. Theoretical study of artificial vision repair systemExtensive research and application technology of artificial vision restoration has been investigated broadly to understand the composition structure of artificial vision repair system. Different types and key technologies of artificial vision repair system have been compared to comprehend the pros and cons of each. Basics have been reserved in order to apply terahertz antenna technology to artificial vision system. Terahertz antenna technology is mainly used to enhance the performance of visual signal extraction system.2. Theoretical study of terahertz antennaThe actual meanings of antenna parameters are well understood through the study of basic theory. Reflecting plane technology, frequency selective surfaces techniques and antenna array technology are employed into the antenna design process with the intention to improve the practical terahertz antenna performance.3. Several new types of antenna are simulated and improved by using electromagnetic simulation software Small, lightweight and high efficiency are three main terahertz antenna properties demanded by artificial vision repair system.Dielectric integrated waveguide slot antenna is lighter than traditional metal waveguide slot antenna. As electromagnetic wave transmission loss is small inside dielectric waveguide, the overall radiation efficiency of the antenna is improved. It works at88.4GHz with a band width of16.4GHz. Maximum directivity is13dBi.Frequency selective surface reflector antenna structure takes advantage of the band-stop characteristic of patch frequency selective array chip. Parabolic reflector enhanced the radiation intensity while at the same time foamed electromagnetic wave beam. The radiation efficiency of the antenna is enhanced due to that reason. It works at101GHz with a band width of6GHz.Size of broadside feed waveguide pyramidal horn antenna is reduced by using a short wall structure which is close to the broad open position. It works at88.5GHz with a band width of17.9GHz. Relative band width is larger than20%. Maximum directivity is16.5dBi.Implantable retinal ceramic patch antenna with a butterfly shape is realized with harm-free bionic titanium and ceramic. It works at0.224THz with a band width of11.6GHz, the maximum directivity is11.8dBi.4. Two types of antenna are fabricated and testedSlot waveguide antenna and the broadside feed waveguide pyramidal horn antenna are fabricated by utilizing precision manufacturing technique. A vector network analyzer is utilized to test the parameters of the antenna.This thesis combines terahertz antenna technology with artificial vision repair system. Information presented in this thesis should be very useful for that kind of combination.