Development and performance analysis of transmitter receiver structures for high data rate communication systems at 240 ghz

The terahertz band are located in the communication spectrum between the microwave band and the infrared wave band. The use of the terahertz band allows for increased capacity and data communication rates for indoor communication systems. The frequency multiplication method is used for signal generation in THz frequencies. Frequency multiplication can be performed using active circuit elements such as transistors, or passive circuit elements such as Schottky diodes. In this thesis, firstly Schottky diode technology and Schottky diode based frequency multiplier and subharmonic mixer structures have been investigated. In the next step, the design and modelling of the frequency upconverter and frequency downconverter for 240 GHz communication systems are carried out using frequency multiplier and subharmonic mixer structures. The effect of noise and conversion losses of nonlinear frequency multipliers and subharmonic mixers on THz signal power are investigated. Finally, indoor communication transmitter receiver models with high data rates at 240 GHz are designed in Simulink and performance analysis is performed for different types of modulation.