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  RF Passive Components Buzzwords

RF /  3G /  Mobile Internet Access /  802.11 /  802.11b /  802.11g /  802.11n / 

Bluetooth /  HiperLAN /  Home RF /  LMDS /  Telematics /  UWB /  Wi-Fi /  Wireless LAN 
 

 
Term
Description
"RF"  
Radio frequency (abbreviated RF, rf, or r.f.) is a term that refers to alternating current (AC) having characteristics such that, if the current is input to an antenna, an electromagnetic (EM) field is generated suitable for wireless broadcasting and/or communications. [source
 

Designation

Abbreviation

Frequencies

Free-space Wavelengths

Very Low Frequency

VLF

9 kHz - 30 kHz

33 km - 10 km

Low Frequency

LF

30 kHz - 300 kHz

10 km - 1 km

Medium Frequency

MF

300 kHz - 3 MHz

1 km - 100 m

High Frequency

HF

3 MHz - 30 MHz

100 m - 10 m

Very High Frequency

VHF

30 MHz - 300 MHz

10 m - 1 m

Ultra High Frequency

UHF

300 MHz - 3 GHz

1 m - 100 mm

Super High Frequency

SHF

3 GHz - 30 GHz

100 mm - 10 mm

Extremely High Frequency

EHF

30 GHz - 300 GHz

10 mm - 1 mm

"3G"  
3G is a short term for third-generation wireless, and refers to near-future developments in personal and business wireless technology, especially mobile communications. Ultimately, 3G is expected to include capabilities and features such as:
» Enhanced multimedia (voice, data, video, and remote control)
» Usability on modes cellular telephone, e-mail, paging, fax, video-conferencing, and web browsing
» Broad bandwidth and high speed (upwards of 2 Mbps)
» Routing flexibility (repeater, satellite, LAN)
» Operation at approximately 2 GHz transmit and receive frequencies
» Roaming capability throughout Europe, Japan, and North America
[source]
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Mobile
Internet
Access


WiMAX, etc.

Notes: All speeds are theoretical maximums and will vary by a number of factors, including the use of external antennae, distance from the tower and the ground speed (i.e. communications on a train may be poorer than when standing still.) Usually the bandwidth is shared between several terminals.

Comparison of Mobile Internet Access methods [ Source - wikipedia ]

Standard
Family
Primary Use
Radio Tech
Downlink (Mbps)
Uplink (Mbps)
Notes
WiMAX Mobile Internet

MIMO-SOFDMA

70

70

Quoted speeds only achievable at very short ranges, more practically 10 Mbps at 10 km.
HIPERMAN Mobile Internet OFDM

56.9

56.9

 
WiBro Mobile Internet OFDMA

50

50

Mobile range (900 m)
iBurst 802.20 Mobile Internet HC-SDMA

64

64 3-12 km
UMTS/3GSM Mobile phone CDMA/FDD .384
14.4
.384
5.76
HSDPA widely deployed. Typical downlink rates today 1-2Mbps, ~200kbps uplink; future downlink up to 28.8Mbps.
UMTS/3GSM Mobile Internet CDMA/TDD 16 16 Reported speeds according to IPWireless using 16QAM modulation similar to HSDPA+HSUPA
UMTS/4GSM General 4G OFDMA/MIMO/SC-FDMA (HSOPA) >100 >50 Still in development
CDMA2000 Mobile phone CDMA 0.144 0.144 Obsoleted by EV-DO
EV-DO 1x Rev. 0

EV-DO 1x Rev.A

EV-DO Rev.B
CDMA2000 Mobile Internet CDMA/FDD 2.45
3.1
4.9xN
0.15
1.8
1.8xN
Rev B note: N is the number of 1.25 MHz chunks of spectrum used. Not yet deployed.
"802.11"  
802.11 is a family of specifications for wireless local area networks (WLANs) developed by a working group of the Institute of Electrical and Electronics Engineers (IEEE).
802.11b and 802.11g – as well as 802.11n when using the 2.4 GHz band – divide the 2.4 GHz spectrum into 14 overlapping, staggered channels whose center frequencies are 5 megahertz (MHz) apart. The 802.11b, and 802.11g standards do specify the center frequency of the channel and a spectral mask width to a power level for that channel. The spectral mask for 802.11b requires that the signal be attenuated by at least 30 dB from its peak energy at ± 11 MHz from the center frequency. This means that an 802.11b/g product occupies five channels to an energy level of 30 dB down from the peak or center of the signal.   [ Source - wikipedia ]
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"802.11b"  
802.11b International standard for wireless networking that operates in the 2.4 GHz frequency range (2.4 GHz to 2.4835 GHz) and provides a throughput of up to 11 Mbps. This is a very commonly used frequency. Microwave ovens, cordless phones, medical and scientific equipment, as well as Bluetooth & Wi-Fi devices, all work within the 2.4 GHz frequency band. [source]
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"802.11g"  
802.11g, offers wireless transmission over relatively short distances at up to 54 megabits per second (Mbps) 802.11g operates in the 2.4 GHz range (2400 MHz) and is compatible with 802.11b Wi-Fi devices.  
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"802.11n"  
802.11n
Release Date Op. Frequency Data Rate (Typ) Data Rate (Max) Range (Indoor)
September 2008 5 GHz and/or 2.4 GHz

74 Mbit/s

248 Mbit/s (2 stream)

~70 meters

[ Source - wikipedia ]
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 "Bluetooth
 
Sources: www.bluetooth.com  |  www.bluetooth.org
 
Commemorates a Danish king of the 10th century who unified Denmark and Norway. Nowadays, Bluetooth unifies communication devices with computing devices wirelessly.

Bluetooth is a computing and telecommunications industry specification that describes how mobile phones, computers, and personal digital assistants (PDAs) can easily interconnect with each other and with home and business phones and computers using a short-range wireless connection. Using this technology, users of cellular phones, pagers, and personal digital assistants such as the PalmPilot will be able to buy a three-in-one phone that can double as a portable phone at home or in the office, get quickly synchronized with information in a desktop or notebook computer, initiate the sending or receiving of a fax, initiate a print-out, and, in general, have all mobile and fixed computer devices be totally coordinated.

Bluetooth requires that a low-cost transceiver chip be included in each device. The tranceiver transmits and receives in a previously unused frequency band of 2.45 GHz (2450 MHz) that is available globally (with some variation of bandwidth in different countries). In addition to data, up to three voice channels are available. Each device has a unique 48-bit address from the IEEE 802 standard. Connections can be point-to-point or multipoint. The maximum range is 10 meters. Data can be exchanged at a rate of 1 megabit per second (up to 2 Mbps in the second generation of the technology). A frequency hop scheme allows devices to communicate even in areas with a great deal of electromagnetic interference. Built-in encryption and verification is provided.
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"HiperLAN"  
HiperLAN is a set of wireless local area network (WLAN) communication standards primarily used in European countries. There are two specifications: HiperLAN/1 (20Mbps) and HiperLAN/2 (54Mbps). Both have been adopted by the European Telecommunications Standards Institute (ETSI). Both operate in the 5-GHz range (5000MHz) of the radio frequency (RF) spectrum
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"Home RF"  
Source - Link: HomeRF  
 
Designed specifically for wireless networks in homes - in contrast to 802.11, which was created for use in businesses -- HomeRF networks are designed to be more affordable to home users than other wireless technologies. Based on frequency hopping and using radio frequency waves for the transmission of voice and data, HomeRF has a range of up to 150 feet.
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"LMDS"  
The term LMDS stands for Local Multipoint Distribution Service  
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"Telematics  
Telematics is the term used to describe a wide variety of wireless in-car services ranging from navigation aids and remote engine diagnostics to various forms of wireless communications. 
Links: more info  |   more info  
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"UWB"  
Ultra-wideband (UWB)
+ 100M bps
+ 30 foot range
+ Aimed at transferring video within the home  
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"Wi-Fi" Wi-Fi Glossary [source: link]
 
802.11b Wireless Ethernet is the most popular wireless Internet access technology. Also known as Wi-Fi, this technology creates a Local Area Network (LAN) - just like the one at your place of work. Radio frequency (RF) connections between a base station and laptop computers fitted with add-on wireless cards replace the wires and cables of a conventional Local Area Network.

Wireless Ethernet LANs deliver high-bandwidth access -- performance for various protocols varies from 2Mb per second to 11Mb per second.

Wireless Ethernet LANs have a coverage area of between 200 to 600 feet per radio transceiver - perfect for airport lounges, hotels and public meeting places.
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"WLAN"  
A wireless LAN = WLAN is one in which a mobile user can connect to a local area network (LAN) through a wireless (radio frequency) connection. A standard, IEEE 802.11, specifies the technologies for wireless LANs.
Source - Links: more info  |  more info
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