Waveguide Switch Design

Waveguide Switch Design: It is often necessary to prevent microwave power from following a particular path, or to force it to follow another path; as at lower frequencies, the component used for this purpose is called a switch. Waveguide Switch Design (or coaxial) may be mechanical (manually operated) or electromechanical (solenoid-operated). They can also be […]

Waveguide Mixers and Detectors

Waveguide Mixers and Detectors: As we know that ordinary transistor and tube RF amplifiers eventually fail at microwave frequencies, because of greatly increased noise, compared with their low-frequency performance. Unless a receiver is to be very low-noise and extremely sensitive (in which case special RF amplifiers will be used, then a mixer is the first […]

Directional Coupler Waveguide

Directional Coupler Waveguide: We already know that a transmission-line Directional Coupler Waveguide. Its applications were indicated at the time as being unidirectional power flow measurement, SWR measurement and unidirectional wave radiation. Exactly the same considerations apply to waveguides. Several directional couplers for waveguides exist, and the most common ones will be described, including a direct […]

Cavity Resonators

Cavity Resonators: A cavity resonators is a piece of waveguide closed off at both ends with metallic planes. Where propagation in the longitudinal direction took place in the waveguide, standing waves exist in the resonator, and oscillations can take place if the resonator is suitably excited. Various aspects of cavity resonators will now be considered. […]