# 180 Degree Hybrids MCQ’s

This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “180 Degree Hybrids”.

1. Port 1 and port 4 of 1800 hybrid are called sum and difference ports respectively because of their behavior and action mechanism.
a) true
b) false

2. S matrix of 1800 hybrid consists of all diagonal elements zero.
a) true
b) false

3. 1800 hybrid is a network in which there is a phase shift of 1800 between the input signal applied and the output taken.
a) true
b) false

4. In 1800 hybrid, different power levels can be received at the two output ports of the hybrid.
a) true
b) false

5. In a waveguide magic-T there is no coupling of power between port 1 and port 4.
a) true
b) false

6. The tapered coupled line 1800 hybrid can provide an arbitrary power division at the 2 output ports of the coupler.
a) true
b) false

7. 18000 ring hybrid with system impedance of 50 Ω has to be designed. Then the characteristic impedance of the arms of the 1800 hybrid is:
a) 50 Ω
b) 70.70 Ω
c) 100 Ω
d) none of the mentioned

8. When a TE10 wave is incident on port 4 of a magic-T, all the power is coupled to port 1.
a) true
b) false

9. The plot of frequency V/s S11 parameter for a tapered line coupler has a dip at the frequency at which it is designed.
a) true
b) false

10. For a tapered line coupler, the curves of S12 and S13 are identical and have the same magnitude at all frequencies.
a) true
b) false