ES&T018

1. GaAs stands for:

Gallium arsenide

Gallium assembly

Gallium astenite

None of the above

2. RADAR stands for:

Radio ranging

Radio depth and ranging

Radio detection and ranging

Remote detection and ranging

3. The characteristic impedance of a waveguide:

Is fixed

Depends on the frequency it carries

Depends on the longer dimension of its cross section

Both b and c

4. Directional couplers for waveguides are characterized by:

Their insertion loss

Their coupling specification

Their directivity

All of the above

5. RADAR uses:

Pulsed transmission

Continuous transmission

The Doppler effect

All of the above

6. IMPATT stands for:

Impact avalanche and transit time

Induced mobility at transmission time

Implied power at transmission terminal

None of the above

7. A resonant cavity is a type of:

Tuned circuit

Defect in a waveguide

Antenna

None of the above

8. The device commonly used in microwave ovens is the:

TWT

Klystron

Magnetron

YIG

9. Circular waveguides use TM 01 mode because:

It is dominant

Of its circular symmetry

It is the only mode possible

It is more efficient

10. Striplines and microstrips are used to:

Couple sections of waveguide

Couple waveguides to antennas

Couple components on a circuit board

None of the above

11. Power can be coupled into or out of a waveguide:

With a magnetic field probe

With an electric field probe

Through a hole in the waveguide

All of the above

12. The dominant mode of a waveguide depends on:

The shape of the waveguide

The power level of the signal

The point of signal injection

None of the above

13. The microwave frequency range is considered to start at:

100 MHz

1 GHz

10 GHz

100 GHz

14. A TEE connector used with waveguides is:

An H-plane TEE

An E-plane TEE

A "magic" TEE

All of the above

15. The dominant mode of a circular waveguide is:

TE 01

TM 01

TE 11

TM11

16. The device commonly used in UHF transmitters is the:

TWT

Klystron

Magnetron

YIG

17. The device commonly used in satellite communications is the:

TWT

Klystron

Magnetron

YIG

18. The UHF range is:

Below the microwave range

Inside the microwave range

Above the microwave range

Same as the microwave range

19. A YIG can be tuned by applying:

An electric field

A magnetic field

Mechanical pressure

An "exciter" signal

20. The maximum effective range for pulsed radar:

Increases with increasing repetition rate

Decreases with increasing repetition rate

Decreases with increasing pulse period

None of the above

21. YIG stands for:

Yttrium-Iron-Gallium

Yttrium-Iron-Germanium

Yttrium-Iron-Garnet

None of the above

22. The dominant mode of a rectangular waveguide is:

TE01

TM01

TE10

TM10

23. The minimum effective range for pulsed radar:

Increases with increasing pulse duration

Decreases with increasing pulse duration

Is always a tenth of the maximum range

None of the above

24. TWT stands for:

Transverse Wave Transmission

Transverse-Wave Tube

Traveling-Wave Tube

Traveling-Wave Transmission

25. An "isolator" is a device that:

Isolates frequencies in a waveguide

Allows a signal to pass in one direction only

Separates signals among various ports

Prevents microwaves from leaking out of a waveguide

26. A microwave phased array is often made using:

Slots

Yagis

Fresnel lenses

All of the above

27. A "circulator" is a device that:

Rotates signal polarity in a waveguide

Allows a signal to pass in one direction only

Separates signals among various ports

Prevents microwaves from being "trapped" in a waveguide

Es&t018

1. GaAs stands for:

2.

What first name or nickname would you like us to use?

2. RADAR stands for:

3. The characteristic impedance of a waveguide:

4. Directional couplers for waveguides are characterized by:

5. RADAR uses:

6. IMPATT stands for:

7. A resonant cavity is a type of:

8. The device commonly used in microwave ovens is the:

9. Circular waveguides use TM 01 mode because:

10. Striplines and microstrips are used to:

11. Power can be coupled into or out of a waveguide:

12. The dominant mode of a waveguide depends on:

13. The microwave frequency range is considered to start at:

14. A TEE connector used with waveguides is:

15. The dominant mode of a circular waveguide is:

16. The device commonly used in UHF transmitters is the:

17. The device commonly used in satellite communications is the:

18. The UHF range is:

19. A YIG can be tuned by applying:

20. The maximum effective range for pulsed radar:

21. YIG stands for:

22. The dominant mode of a rectangular waveguide is:

23. The minimum effective range for pulsed radar:

24. TWT stands for:

25. An "isolator" is a device that:

26. A microwave phased array is often made using:

27. A "circulator" is a device that: