WLAN Diplexer
15 January 2007 14:46
It is becoming increasingly popular to use WLANs for internet surfing.
Here we present a diplexer that can feed and extract WLAN signals inter-
ference-free to and from a line that is already used for transmitting mobile communication bands.
The IEEE Group adopted a WLAN (Wireless Local Area Network) standard in 1997 and made it available license-free in the ISM-Band (Indus-trial, Scientific, Medical) at 2.4GHz.
Ever since more and more users have taken to surfing the internet on their own laptop computer in cafes or hotel lobbies. There is a growing number of hot spots in highly frequented places where logon is possible. Many users also wish to have full WLAN coverage inside buildings. Since numerous public buildings already have an in-house infrastructure for mobile phones the obvious idea is to also use it for WLAN access.
The diplexer presented here is an extension of our MNCS® (Mobile Network Combining System) product range. A carefully designed combination of filters in the diplexer achieves an isolation level of well beyond 50dB between WLAN and the mobile communication bands UMTS, GSM1800, GSM900 and the wireless services below them, such as TETRA. Thus it is possible to feed a WLAN signal to a line transmitting mobile communication services without interference. Likewise the signal can also be extracted interference-free from the line. DC power supply and AISG signal transmission on the same line remain unaffected, too.
As an option our MNCS® racks can be extended by a WLAN diplexer as a 19in insert. The diplexer is also
suited for outdoor installation on walls or masts.
For more information on this company:
SPINNER - RF Components for Mobile Communication Networks
Copyright 2007SPG Media Limited a subsidiary of SPG Media Group PLC
