WAVEGUIDES

In a wave guide,TE mode means

• Magnetic field is perpendicular to the direction of wave propagation

• Magnetic field and electric field are perpendicular to each other

• Electric field is perpendicular to the direction of wave propagation

• None of the above

What is the impedance of most waveguide?

• 300 ohms

• 75 ohms

• 600 ohms

• 50 ohms

When does a transmission line terminated in a short look

like a short to the source?

• at less than 1/2

• at quarter wavelength

• at less than 1/4

• at half wavelength

In a waveguide, the TM mode means that the:

• Electric field is perpendicular to the direction of wave propagation

• Magnetic and electric fields are perpendicular to each other

• Magnetic field is perpendicular to the direction of wave propagation

• None of the above

How wide must a waveguide be?

• Over wavelegth/2

• Over wavelength/4

• Less than wavelength/4

• Less than wavelength/2

What is the dominant mode in rectangular waveguide?

• TE02

• TM11

• TM01

• TE10

The mode at which wave guide operates is determined by the

• Shape of the waveguide

• Length of the waveguide

• Method used to couple the signal to the wave guide

• Impedance of the waveguide

A matching stub should be placed _____.

• Midway between load and transmitter

• Nearest to the load

• Nearest to the transmitter

• Anywhere

What is meant by a voltage node?

• High impedance

• Voltage minima

• current minima

• voltage maxima

Which of the following is not a method of coupling into or out of a wave guide

• Probe

• Loop

• Holes

• Slot