Simplest sinusoidal variable frequency oscillator is amstrong circuit. Simplest sinusoidal constant frequency oscillator is crystal oscillator. Parasitic oscillation is caused by transistor inter electrode capacitance. If you movie towards an oscillating circuit its frequency increases because of hand capacitance. Frequency stability is maximum in wein bridge oscillator. Practically in order to change frequency of oscillation …
Antennas are inductive.Microwave antennas are horn antenna, Parabolic antenna, slot antenna, dipole antenna, dielectric antenna, printed antenna, phase array antenna, Micro strip patch antenna, Plasma antenna, MIMO antenna. Horn antenna is the most widely used microwave antenna. As frequency increases gain of horn antenna also increases. Horn antenna is a fixed size antenna. Horn antenna …
Most of the link uses 4 and 6 GHz. Short term fading in microwave communication links can be overcome by diversity reception and transmission.Ionosphere propagation is not possible in micro wave communication because it penetrate through ionosphere. In microwave communication links, the rain drop attenuation experienced is mainly due to absorption of microwave energy by …
E plane tee – axis of its side arm is parallel to the electric field in the main branch.E arm is also called series arm and main arm is called collinear arm. If fields of same magnitude and phase are entered through the opposite sides of main arm then net field in the side arm …
FET FET has square law characteristics. It has negative temperature coefficient. High immunity against radiation. FET has least noise. Pinch off voltage of FET is 5 volt. FET is classified in to JFET ( junction field effect transistor) and MOSFET (metal oxide semiconductor FET). MOSFET has highest input impedance. Quiescent current of FET is ID. …