RA logo

Mobile Phones: Jargon Explained

*

2G Second Generation Mobile Phone System. See GSM
3G See Third Generation Mobile Phone System.
Aerial Device designed to radiate and receive electromagnetic energy.
 
Aerial
Antenna See Aerial
Cabin Air-conditioned weather-proof enclosure housing transmitters and receivers.
 
Cabin
Cell The area of geographic coverage from a mobile phone transmitter.
 
Cell
Dish Antenna Dish antenna transmit and receive a highly focussed radio wave in one direction and are used for point to point communication links.
 
Dish Antenna
Face Mount Antenna fixed directly to brick work or other material of an existing structure.
 
Face Mount
Feeder Co-axial cable which connects an antenna to a base station transmitter or receiver.
Frequency, Wavelength and Velocity

Frequency 'f' is the number of complete cycles passing a fixed point in one second. If one cycle passes a fixed point in one second this corresponds to a frequency of 1 Hertz (Hz).

Wavelength is the distance in meters between any two 'similar' points on a radio wave. This portion of the wave is referred to as one complete cycle. Wavelength is given the symbol ''

In free space the velocity of an electromagnetic wave (such as a radio wave) is approximately 3 x 108 ms-1. This is the speed of light (since light is also an Electromagnetic wave) and is usually given the symbol 'c'.

The relationship between 'c' (velocity), 'f' (frequency) and '' of an Electromagnetic wave is given by the equation:-

c = f or = c/f

A lower frequency wave will have a long wavelength, while a high frequency wave corresponds to a short wavelength.

GSM

Global system for Mobile Communications or Groupe Speciale Mobile.

The international, pan-European operating standard for the current generation of digital cellular mobile communications. It enables mobile phones to be used across national boundaries.

RA publishes details of the technical requirements for GSM technology operating in the UK in the form of UK Interface Requirement [IR2014]

GSM systems are operated by BT Cellnet and Vodafone at 900 and 1800 MHz, and by One-2-One and Orange at 1800 MHz.

Macrocell A macrocell provides the main radio coverage infrastructure for a mobile network. The antennas for macrocells are mounted on ground-based masts, rooftops and other existing structures, at a height that provides a clear view over the surrounding buildings and terrain. Macrocells provide radio coverage over varying distances dependent upon frequency capacity and clutter. Macrocell base stations have power outputs of typically tens of watts.
 
Macrocell images

Mast

 

Ground-based structure, which supports antennas at a height where they can satisfactorily send and receive radio waves. A mast is typically 15m high, and of steel lattice or tubular steel monopole construction, although other designs, including disguised structures, are available. Masts play no part in the transmission of the radio waves.
 
Mast
Microcell Microcells provide infill radio coverage and additional capacity where there are high numbers of users within urban and suburban macrocells. The antennas for microcells are mounted at street level (i.e. below the surrounding buildings and terrain) typically on the external walls of existing structures, lamp-posts and other street furniture. Microcell antennas are smaller than macrocell antennas and when mounted on existing structures can often be disguised as building features. Microcells provide radio coverage over distances, typically, between 300m and 1000m. Microcell base stations have lower output powers than macrocells, typically a few watts.
 
Microcell
Picocell Picocells provide more localised coverage than microcells, inside buildings where coverage is poor or there are high numbers of users.
 
Picocell
Pole Mount Small diameter pole fixed to an existing structure or roof, which supports one or two antenna and/or dish antenna at a height where it can satisfactorily send and receive radio waves. Pole mounts play no part in the transmission of the radio waves.
 
Pole Mount
Radio Base Station A base station is a macrocell, microcell or picocell site and consists of transmitters and receivers in a cabin or cabinet connected to antennas by feeders.
 
Second Generation See GSM
Sectored Antenna Antenna which transmits or receives higher signal levels in one particular horizontal directional. Several sectors are required, (typically three or six) to provide 360 degree coverage.
 
Stub Mast Roof-mounted mast structure, which supports multiple antennas at a height where they can satisfactorily send and receive radio waves. A stub mast is typically 4m - 6m high and of steel lattice construction. Stub masts play no part in the transmission of the radio waves.
   
Third Generation Third generation mobile communications systems have high-speed data capabilities and will offer advanced services to users on the move. These services operate at 2200 MHz.(2.2 GHz) The third generation technology used in the UK is called UMTS.
Transmitter Electronic equipment that generates radio frequency electromagnetic energy and is connected to an antenna via a feeder cable
UMTS

Universal Mobile Telecommunication System.

The type of technology used in the UK for the next evolution (see Third Generation) of mobile phone technology and expected to result in widespread use of video phones and access to multimedia information.

RA publishes details of the technical requirements for UMTS technology operating in the UK in the form of UK Interface Requirement [IR2019]

Wavelength

See Frequency

Top button

*

Back to Main Audit page

RA Home