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RFS (Radio Frequency Systems), the wireless infrastructure specialist, has developed a ground breaking wideband diplexer technology that will assist carriers as they migrate their cellular network infrastructures to LTE - Long Term Evolution.

As with previous diplexer and triplexer technology from RFS, the new wideband diplexer systems on show in Barcelona at GSMA Mobile World Congress are designed to enable feeder sharing of several systems on the same site.

Focusing at the highest technical performance standard, designed for easy installation and spearheaded by the ShareLite Diplexer range, the new RFS technology is a positive development for both carriers and end-users alike.

Carriers will get access to antennas and associated electronics that will support multi-band and multi-frequency transmissions without physically overloading the cell tower.

End-users, meanwhile, will get access to the many benefits of LTE, not least the possibility of much higher mobile broadband speeds than seen on 3G/HSPA-enabled systems.
David Kiesling, global product manager for Wireless Infrastructure Solutions with RFS, said that, whilst cellular has come a long way in the last two decades, LTE is set to propel wireless communications far further forward - and lot more rapidly than seen before - in just a few short years.

“The industry has gone about as far as it can with GSM networks operating at 900, 1800 and 1900 MHz. 3G services at 2100 MHz, meanwhile, have been a very useful progression, but the industry is already planning for LTE services which will operate at 2600 MHz in most of the world and 700 MHz in North America,” he said.

“In addition, and using a technology already undergoing tests in Australia, there are plans to re-use legacy GSM frequencies for LTE transmissions, allowing LTE signals to reach greater distances than 3G in urban and rural areas,” he added.

The use of GSM 1800 frequencies for LTE transmissions in particular, he went on to say, will enhance indoor signal propagation and ensure that in-building signal quality is more uniform than seen on 3G services.

According to Kiesling, it is clear from informal discussions that RFS has had with network customers planning to use LTE, that the world’s carriers are keen to generate a faster return on investment with LTE than they achieved with 3G.

This is clearly illustrated, he said, by the fact that, while North American carriers are required – under the terms of their licenses – to achieve 40 per cent coverage with LTE by 2013, there is every indication that they are planning to reach this target in a shorter timeframe.

Multi-band diplexers solve tower overload issues

It’s against this rapidly evolving backdrop that RFS has developed a leading edge set of base station technologies - spearheaded by its multi-band diplexers.

These units can slot neatly onto existing cell towers without adding any extra electronics and associated cabling nor any extra load on the cell tower structures.

Diplexers are devices that enable a single RF feeder cable to be shared by two different bands thus minimizing the required RF infrastructure by obviating the need for a second feeder.

The different varieties of diplexer that RFS has developed will cover carriers’ needs around the world, ranging from 698-960/1710-2200MHz and 698-787/824-896MHz for North American LTE deployments to versions supporting 698-960/2300-2700MHz and 1710-2200/2500-2700MHz for Rest-of-World LTE deployments in the 2600MHz waveband.

“For many carriers, 3G has been a logistical headache in terms of squeezing extra feeders, antennas and electronics on the top of already crowded cell towers, especially in dense urban areas. Our wideband range of diplexers won’t add to this array of systems.

“Instead, the new diplexer range will replace what would otherwise be multiple feeders with state-of-the-art technology that features near zero-insertion-loss (at most 0.1 dB) amongst a wide array of other advantages” said Kiesling, adding that RFS’ true multiband antennas are equipped with single Tx and Rx feeders, not multiple feeders as is normally the case where multiple antennas merely share the same radome.

“The combination of true multi-band antennas and feeder-sharing diplexers is the elegant solution to cell tower congestion,” he said.

“For the carriers, this means reduced capex and much less need for extra cell site towers, plus no extra leasing fees to site owners, by keeping the antenna count to an absolute minimum. For carriers and their customers, this translates to more rapid LTE service rollouts, allowing mobile customers access to greatly enhanced mobile broadband speeds and improved quality of service,” he added.

Kiesling calls this a ‘win-win-win’ situation for all concerned, with RFS, its carriers and their customers, all enjoying the benefits that LTE brings to the cellular table.

“And given that the wideband diplexer technology we are showing at the GSMA World Congress also allows easy support for legacy technologies such as GSM and PCS, which are still widely used by fleet-tracking systems and consumers generally, users can look forward to being able to continue to use their legacy hardware for many years to come,” he said.



Can be downloaded here:

Note to EDITORS:

Please follow the links for further Mobile World Congress press releases and supporting photographs :

• Mobile World Congress Preview (RFS0213)
Download here;

• LTE -“Ready when you are” says RFS (RFS0214)
download here;

• RFS pushes the diplexer technology envelope to assist in cellular longevity (RFS0224)
Download here; GSMAMWC.doc

• CELLFLEX Lite - new additions complete RFS’ proven aluminum transmission line technology range (RFS0223)
download here;

• High performance and healthy ROI go hand in hand with RFS’ new Optimizer CELlite base station antenna (RFS0222)
download here;

• RFS Mobile TV antenna: compact, slim and lightweight features come as standard (RFS0221)
download here;

• ClearFill Space 2: flexibility and customizable wireless coverage with virtually unlimited topology applications (RFS0220)
download here; GSMAMWC.doc

• Wireless RF-over-Ethernet becomes a reality from Radio Frequency Systems (RFS0219)
download here;

RFS Company background

Radio Frequency Systems (RFS) is a global designer and manufacturer of cable, antenna and tower systems, plus active and passive RF conditioning modules, providing total-package solutions for wireless infrastructure.

RFS serves OEMs, distributors, system integrators, operators and installers in the broadcast, wireless communications, land-mobile and microwave market sectors. As an ISO compliant organization with manufacturing and customer service facilities that span the globe, RFS offers cutting-edge engineering capabilities, superior field support and innovative product design. RFS is a leader in wireless infrastructure.

For more information visit:


Trademarks: Radio Frequency Systems® and RFS® are registered trademarks of Radio Frequency Systems. All other trademarks are the property of their respective owners.

Global contact:

Eric Mariette, VP Global Marketing & Strategy, Radio Frequency Systems
Telephone: +33 1 5566 7395
Mobile during Mobile World Congress: +33 6 1275 1323

Media contacts:

Jo Gottschalk
Turtle Consulting Group UK
Tel: + 44 70 74 707 081

Elaine Witteridge
Turtle Consulting Group UK
Tel: + 44 70 74 707 062

Jackie Thomas
Turtle Consulting Group Asia Pacific
Tel: + 64 2737 57 461

This press release was distributed by ResponseSource Press Release Wire on behalf of Turtle Consulting Group in the following categories: Consumer Technology, Personal Finance, Business & Finance, Computing & Telecoms, for more information visit