What is the other band name for UHF?
Decimetre band
What does UHF stand for?
Ultra High Frequency
What is the wavelength range for UHF?
1m - 10cm
What is the frequency range for UHF?
300 MHz - 3 GHz
What ITU designation is below UHF?
VHF
What ITU designation is above UHF?
SHF
What kind of obstacles block UHF frequencies?
Hills and large buildings
What is UHF used for?
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
What type of propigation does UHF have?
Line of sight (LOS)
What kind of obstacles can UHF penetrate?
- Building walls (Inside or near buildings)
- Foliage
What may attenuate a UHF signal?
Atmospheric moisture
What circumstance may cause a UHF signal to travel farther?
Tropospheric ducting
What is the average length of a UHF omnidirectional antenna?
2.5 cm - 25 cm
What is the UHF frequency range for amateur radio allocation?
430 MHz - 450 MHz (70 cm band)
What is the general maximum effective range for UHF land?
~55 km (35 mi)
What are some benefits of UHF?
- 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
What are some drawbacks to UHF?
- Short effective range
- Equipment cost tends to be higher than VHF
