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Tag Archives: Radio Frequency Systems

Happy 120th Birthday!

By Don Bishop, executive editor, associate publisher, AGL Magazine

Congratulations to Radio Frequency Systems (RFS) on its 120th birthday anniversary!

According to RFS CEO Monika Maurer, few companies have a history of world firsts and inventions that date back to 1900. “We are very proud of our legacy and our groundbreaking innovation,” she said in a YouTube video.

A news release from RFS marking the occasion says that the company has been responsible for industry developments ranging from wire in 1900 to radiating cable for connectivity in tunnels and is currently working to ease the evolution to 5G wireless communications.

The company traces its beginning to German engineer Louis Hackethal. A commemorative video RFS produced says Hackethal invented the first insulated wire for telecommunications.

The company Hackethal-Draht-Gesellschaft in Hannover was created to make cables.

Throughout its history, RFS has been responsible for a number of key inventions in cable and antenna technology. These range from creating that first insulated wire for telecommunications in 1900, to designing in 1972, under the name KabelMetal, the first radiating cables to deliver connectivity in tunnels, which are used in 41 percent of metro rapid-transit train stations worldwide.

In 1983, the video explains, KabelMetal was part of mergers that led to the creation of Radio Frequency Systems.

This year, the company’s research-and-development (R&D) teams developed Dragonskin, the first standalone cable to meet the most stringent fire safety standards, while integrating 5G-ready capabilities across its entire portfolio.

The news release says the company has manufacturing sites, R&D centers and offices in 20 countries and deployments at some of the world’s most recognizable sites. In 2017, it delivered the broadcast solution that sits on top of the One World Trade Center overlooking New York City.

RFS has contributed articles to AGL Magazine and other magazines I edited going back to 1983. Just one example: RFS contributed articles that helped readers to install coaxial cable on towers and install connectors properly. Maybe one of their articles helped you in your job. The articles RFS contributed certainly helped me in my job, and my thanks to the company for that.

“At RFS, innovation is in our DNA,” Maurer said. “We are inventors, and we are focused on your future.”

Here’s to a wonderful future for RFS. 120 years, so far. Imagine that!

Triple-Band Antennas

Radio Frequency Systems (RFS) has introduced the APXVBLL20X-C and APXVBLL20X-C-I20 models of its RF X-TREME Triple-Band Antenna, RFSwhich facilitate triple-band site upgrades for reduced cell interference in high traffic areas.  BLL RF X-TREME antennas can be used for multiple bands such as LTE 700, LTE 800, Digital Dividend 2, CDMA, GSM, DCS, UMTS and LTE 2.6.  With the RF X-TREME portfolio, RFS provides the capacity of three full-band antennas by orienting them side by side to achieve high gain and optimal performance in a single package. Using the entire antenna length for every band instead of the traditional method of stacking antennas on top of one another allows operators to move from a dual-band antenna to a triple-band antenna of the same length and maintain similar gain levels.  Providing full-band coverage on every port enables operators to now implement 4xRx and 4xMIMO on any of the higher frequency bands, enhancing cell-edge performance with fewer base stations – which is particularly effective for LTE advanced. www.rfsworld.com

Ultra-Broadband Triple-Band Antennas

Radio Frequency Systems (RFS) has introduced the APXVBLL20X-C and APXVBLL20X-C-I20 models of its RF X-TREME Triple-Band Antenna. The latest ultra-broadband antennas facilitate triple-band site upgrades for reduced cell interference in high traffic areas. BLL RF X-TREME antennas can be used for multiple bands such as LTE 700, LTE 800, Digital Dividend 2, CDMA, GSM, DCS, UMTS and LTE 2.6.

With RF X-TREME, RFS provides the capacity of three full-band antennas by orienting them side-by-side to achieve high gain and optimal performance in a single package. Providing full-band coverage on every port enables operators to implement 4xRx and 4xMIMO on higher frequency bands for cell-edge performance with fewer base stations.

The aerodynamic BLL models support 694-2690MHz frequency bands. They are triple-band cross-polarized with three arrays (6 ports), 1×694-960 / 2×1695-2690. The radome design reduces wind load and minimizes tower loading. RFS triple-band antennas offer broad variable tilt range from 0-10 degrees, beneficial in dense areas, while maintaining 28dB isolation premium performance.

Variable electrical downtilt enhances precision for controlling intercell interference; tilt is remotely adjustable according to AISG/3GPP standards. The antennas offer integrated RET, manual overdrive and tilt indicator to streamline installation and ease-of-use. Integrated RET serial numbers on the antenna radome ease on-site commissioning and secure remote mapping from OMC. www.rfsworld.com

AWS-3 Antennas

RadioFrequencySystemsShowcase0315 (2)Radio Frequency Systems (RFS) offers products to help carriers support the new AWS-3 frequency bands. All RFS 65-degree core antenna models are already compatible with AWS-3, and AWS-3 support will be extended to every other RFS antenna model. RFS’ product portfolio for AWS-3 includes new models of filters, diplexers and tower-mounted amplifiers to include AWS-3 paired spectrum, 1755 MHa to 1780 MHz and 2155 MHz to 2180 MHz, all with the same RF performance. The products feature lightweight, low insertion loss, IP67 Class protection and a new triplexer with DC sensing. www.rfsworld.com

Tower-Mounted Amplifiers

Radio Frequency Systems has announced the availability of tower mounted Amplifiers (TMAs) for the 700 MHz ABC-block, 700 MHz upper-C block, 700 MHz public safety LTE spectrum and AWS-PCS dual band with integrated 700/850 MHz diplexer. As operators roll out Voice-Over-LTE (VoLTE) services, they need to deliver the high-quality voice services no interruptions in service. This can be accomplished by optimizing the uplink signal from the user device with tower-mounted amplifiers, ensuring seamless VoLTE coverage while maintaining the high data throughput needed to deliver an optimal user experience.

Tower-mounted amplifiers are increasingly being deployed in low-band frequencies, such as 700 MHz, because the LTE is uplink-limited — and VoLTE underlines this limitation even further. The LTE system takes advantage of the added uplink gain provided by a TMA, reducing the transmitted power of all mobile devices in the cell. This reduces the overall interference that mobile devices generate in the uplink spectrum. www.rfsworld.com