Free Printable F023 TAv 21

1.

Which of the following pictures shows a Flexible Microwave (Gore) Cable?

a)

b)

c)

d)

e)

2.

Which of the following pictures shows a waveguide?

a)

b)

c)

d)

e)

3.

True or false;

A coaxial cable is a balanced transmission line.

a)

False

b)

True

4.

True or false;

Twin wire open feeders are suitable for transmissions with frequencies higher than 3GHz.

a)

False

b)

True

5.

What are the typical Z_o values for manufactured transmission lines that are Open-Wire?

a)

$300\Omega\ and\ 600\Omega$

b)

$50\Omega\ and\ 75\Omega$

c)

$3K\Omega\ and\ 5K\Omega$

d)

$50\mu\Omega\ and\ 75\mu\Omega$

6.

Which of these conditions would give the maximum power transfer from the transmission line to the load?

a)

$Z_{Load}=Z_o$

b)

$Z_{LOAD}<Z_o$

c)

$Z_{LOAD}>Z_o$

7.

True or False:

If the Z_o=Z_LOAD then you would expect to see a VSWR in the region of 1:20.

a)

False

b)

True

8.

What is VSWR?

a)

It is a measure of the impedance mismatch, between the load and transmission line.

b)

It is a measure of the frequency deviation, between the load and transmission line.

c)

It is a measure of the dc current variation, between the load and transmission line.

d)

It is a measure of the resistance difference, between the load and transmission line.

9.

True or False:

The "polarization" of an aerial is the orientation of the electric field (E-field) of the radio wave with respect to the Earth's surface.

a)

True

b)

False

10.

The polar diagram shows the transmission pattern of which type of Aerial?

a)

Vertically mounted dipole aerial

b)

Horizontally mounted dipole aerial

c)

Vertically mounted Marconi aerial

d)

Horizontally mounted dipole aerial with a reflector and directors

F023 TAv 21 - Comms EO 21.06

Total questions: 10

Worksheet time: 5mins

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