A slotted line is used for the measurement of VSWR. The slot is cut at the centre, because? Mark as favorite Copy Link the field inside the waveguide will not be perturbed to get a good impedance matching maximum field will be induced to the penetrating probe no field will be coupled to the probe Check Answer
In a waveguide network, there is a component which consists of an E-plane Tee combined with an H-plane Tee. What is this component generally-known as? Mark as favorite Copy Link Magic Tee Directional Tee Coupler Tee Phased array Tee Check Answer
The underlying principle of working of a cavity wavemeter, tuned to measure frequency of microwaves in a system, is? Mark as favorite Copy Link resonance of a cavity with incoming microwave energy selective absorption of microwave energy in solids selective diffraction of microwaves around a cavity selective scattering of microwave energy by a cavity Check Answer
A higher directivity is specified by? Mark as favorite Copy Link low gain low bandwidth high gain high bandwidth low gain high bandwidth high gain low bandwidth Check Answer
By measuring the VSWR values in the main and ancillary waveguides of a directional coupler, we can determine its? Mark as favorite Copy Link phase co-relation and efficiency attenuation and radiation efficiency directivity and coupling factor frequency shift and phase variations Check Answer
Electromagnetic oscillations are sustained in a two-cavity klystron due to? Mark as favorite Copy Link feedback of output power to the input cavity with phase difference of 180° feedback of output power to the input cavity in proper phase feedback of power from thermal noise of load circuit with phase lag of 90° feedback of power from external load to input cavity in proper phase Check Answer
To overcome difficulties with strapping at high frequencies, the type of cavity structure desired for magnetron is? Mark as favorite Copy Link slot hole and slot rising sun vane Check Answer
The slow-wave structure of a TWT is provided with an attenuator, Which one of the following is the function of such an attenuator? Mark as favorite Copy Link It is used to broadband the device It prevents the RF power from reaching the output of the device when the beam is switched on It prevents oscillations in the device It reduces the noise level of the device Check Answer
For using as a local oscillator for frequency measurements, the most suitable microwave source would be? Mark as favorite Copy Link reflex klystron travelling wave tube magnetron double cavity klystron Check Answer
To avoid difficulties with strapping at high frequencies, what type of cavity structure is used in the magnetron? Mark as favorite Copy Link Slot Hole and slot Rising sun Vane Check Answer