1 MICROWAVE PASSIVE COMPONENTS: DIRECTIONAL COUPLER, POWER DIVIDER, MAGIC TEE ATTENUATOR, RESONATOR

Related MCQs

• For a Wilkinson power divider of insertion loss L and the coupler is matched to the external circuitry, and then the gain of the coupler in terms of insertion loss is:
• Microwave tubes are power sources themselves at higher frequencies and can be used independently without any other devices.
• Bandwidth of balanced amplifier can be an octave or more, but is limited by the bandwidth of the coupler.
• Coupler that is mostly used in balanced amplifiers to achieve the required performance is:
• Noise equivalent temperature of Wilkinson coupler having a gain of 1/2L is given as:
• Magnetrons are microwave devices that offer very high efficiencies of about 80%.
•                          is a microwave device in which the frequency of operation is determined by the biasing field strength.
• High gain is not achievable at microwave frequencies using BJT amplifiers because:
• Noise figure can be defined for any microwave network irrespective of any other constraints.
• In microwave oscillators, negative resistance transistors and diodes are used in order to generate oscillations in the circuit.