UHF

Question 1

What is the other band name for UHF?

Answer 1

Decimetre band

Question 2

What does UHF stand for?

Answer 2

Ultra High Frequency

Question 3

What is the wavelength range for UHF?

Answer 3

1m - 10cm

Question 4

What is the frequency range for UHF?

Answer 4

300 MHz - 3 GHz

Question 5

What ITU designation is below UHF?

Answer 5

VHF

Question 6

What ITU designation is above UHF?

Answer 6

SHF

Question 7

What kind of obstacles block UHF frequencies?

Answer 7

Hills and large buildings

Question 8

What is UHF used for?

Answer 8

Public radio services such as:

• TV broadcasting
• Cell phones
• Satellite communications (GPS)
• General Mobile Radio Service (GMRS)
• Family Radio Service (FRS)
• Public safety
• Industry
• Military

As well as personal radio services like:

• Wireless fidelity (Wifi)
• Bluetooth
• Cordless phones

Question 9

What type of propigation does UHF have?

Answer 9

Line of sight (LOS)

Question 10

What kind of obstacles can UHF penetrate?

Answer 10

• Building walls (Inside or near buildings)

- Foliage

Question 11

What may attenuate a UHF signal?

Answer 11

Atmospheric moisture

Question 12

What circumstance may cause a UHF signal to travel farther?

Answer 12

Tropospheric ducting

Question 13

What is the average length of a UHF omnidirectional antenna?

Answer 13

2.5 cm - 25 cm

Question 14

What is the UHF frequency range for amateur radio allocation?

Answer 14

430 MHz - 450 MHz (70 cm band)

Question 15

What is the general maximum effective range for UHF land?

Answer 15

~55 km (35 mi)

Question 16

What are some benefits of UHF?

Answer 16

• Short range allows the same frequency channels to be reused by other users in neighboring geographic areas (frequency reuse)
• Good for use in buildings
• Short, compact antennas

Question 17

What are some drawbacks to UHF?

Answer 17

• Short effective range

- Equipment cost tends to be higher than VHF