Kailash Kushwaha (2000521195006)

A traveling wave tube (TWT) amplifier has been an important device used in the application of satellite and radar communication in the last few decades. It offers a better power level among other solid-state devices in between the frequency range (80-300 GHz), resulting in a wide area of application such as wireless communication, plasma diagnostic, and healthcare where high power at millimetre waves is required in small size. TWT internal circuits on the PCB are crucial for the device’s flawless operation since they interface with the device’s numerous components and produce an electron beam at a high rate of speed. A high-power amplifier called a traveling wave tube is used to amplify microwave signals up to a long distance. It is a unique kind of vacuum tube with a working frequency that ranges from 300 MHz to 50 GHz. There are various PCB boards required for the smooth operation of TWT such as the Main interface circuit, Timing control and protection, collector converter helix converter, and high voltage section which is made in this research by removal of old devices like vacuum tubes with new advance solid-state devices. Firstly, the mains interface circuit of a TWT amplifier is designed and modeled using Proteus in which power supply modules must run at consistent DC voltages to function. A mains interface power supply module requires the following voltages: 300V, 150V, and 12V. It has been discovered that it is possible to generate 300V and 150V with tolerable variations as well as a fixed 12V using the suggested mains interface circuit Secondly, the timing-control & protection circuit, helix converter, and collector for a TWT amplifier. Generates the high voltage component generates voltages of roughly 800-3000V. The collector converter and helix converter circuits, which utilize a +12V DC power source to generate pulse signals of 2.5 V amplitude and varying pulse width, are located before the TWT amplifier in a high voltage portion. Lastly, the power supply circuit is designed to have the voltage values required to operate and test a TWT amplifier. Three voltage levels are obtained by creating and simulating the modulator power supply and pulse modulator: +220V, -112V, and +12V. A pulse modulator and a modulator power supply are required for the TWT testing circuit. The device is put to the test using two circuits from the TWT power supply. In addition to the first and second DC output voltages, the modulator power source also generates +12 volts. To function, the pulse modulator circuit requires power supply voltages of +220V, -112V, and +12V.