📊 Antennas and Microwave Engineering
Q. Klystron amplifiers have high noise output as compared to crossed field amplifiers.
  • (A) true
  • (B) false
  • (C) ---
  • (D) ---
💬 Discuss
✅ Correct Answer: (B) false

Explanation: crossed filed amplifiers have very good efficiencies – up to 80%, but the gain is limited to 10-15 db) in addition, the cfa has a noisier output than either a klystron amplifier or twt. its bandwidth can be up to 40%.

Explanation by: Mr. Dubey
crossed filed amplifiers have very good efficiencies – up to 80%, but the gain is limited to 10-15 db) in addition, the cfa has a noisier output than either a klystron amplifier or twt. its bandwidth can be up to 40%.

💬 Discussion

Related MCQs

Q. The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except

Q. The voltage used for suburban trains in D.C. system is usually

Q. In an open loop control system

Q. The first order control system, which is is well designed, has a

Q. A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to

Q. If two sine waves of the same frequency have a phase difference of JT radians, then

Q. Consider the loop transfer function K(s+6)/(s+3)(s+5) In the root locus diagram the centroid will be located at:

Q. Delay time is the time required by a system to reach a quarter of its steady state value.

Q. Let c(t) be the unit step response of a system with transfer function K(s+a)/(s+K). If c(0+) = 2 and c(∞) = 10, then the values of a and K are r

Q. If voltage feedback (negative) is applied to an amplifier, its output impedance _________.

📊 Question Analytics

👁️
889
Total Visits
📽️
3 y ago
Published
🎖️
Mr. Dubey
Publisher
📈
84%
Success Rate