GATE ECE 2008 | GATE ECE Year Wise Previous Years Questions

GATE ECE 2008

MCQ (Single Correct Answer)

-0.6

A rectangular waveguide of internal dimensions (a = 4 cm and b = 3 cm ) is to be operated in $$T{E_{11}}$$ mode. The minimum operating frequency is

6.25 GHz

6.0 GHz

5.0 GHz

3.75 GHz

GATE ECE 2008

MCQ (Single Correct Answer)

-0.3

For a Hertz dipole antenna, the half power beam width (HPBW) in the E-plane is

$${360^ \circ }$$

$${180^ \circ }$$

$${90^ \circ }$$

$${45^ \circ }$$

GATE ECE 2008

MCQ (Single Correct Answer)

-0.6

At 20 GHz, the gain of a parabolic dish antenna of 1 meter diameter and 70% efficiency is

15 dB

25 dB

35 dB

45 dB

GATE ECE 2008

MCQ (Single Correct Answer)

-0.3

Which of the following is true?

A silicon wafer heavily doped with boron is a p⁺ substrate

A silicon wafer lightly doped with boron is a p⁺ substrate

A silicon wafer heavily doped with arsenic is a p⁺ substrate

A silicon wafer lightly doped with arsenic is a p⁺ substrate

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