Microwave Oscillator Design

Oscillator now is taking one of the most important roles in RF and microwave engineering and it can be applied widely in many RF system in practice. The design of oscillator therefore is necessary in the study of electronics. This thesis work aimed to study an effective way in designing a functional and stable oscillator. The first section of this paper gives a detailed theoretical background about microwave oscillator. Microwave oscillator operates on the principle of LC tank circuit and it is used in the electronic system to generate AC output signals without any input. The structure of microwave oscillator typically includes two main parts: an active device (two-port transistor) and a passive frequency-determining resonant element. Therefore, the discussions about transistor’s stability factor and resonator’s classification are given in details. Besides that, after delivering the technical background of microwave oscillator in theory, the practical design was implemented to create an applicable layout for microwave oscillator which could be used at the given frequency of 1GHz. To implement the microwave oscillator a PCB was designed by NI AWR, a circuit design software which provides the simple design environment with integrated high-frequency circuits as well as good simulation technologies. The final layout of the designed oscillator is applicable and useful. With further improvements in design and assembly process, it can be applied for other electronic projects