Proactively Dealing with PIM Interference
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Proactively Dealing with PIM Interference
BACKGROUND Interference caused by passive intermodulation (PIM) has become a serious problem for network operators around the world. As more and more frequency bands are deployed at cell sites, operators will eventually create a condition where 3rd order intermodulation products (IM3) fall in one or more of their uplink bands. These 3rd order intermodulation products […]
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PIM testing in DAS Networks
Background: By: Tom Bell, Senior Director, Interference Product I recently was invited to join a call to discuss PIM test methods that were being used to certify distributed antenna systems (DAS) performance. The parties involved were using an IWPC PIM testing best practices document I helped co-author in 2014 to guide their testing methodology. The […]
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Valmont and Ericsson Announce the Acquisition of ConcealFab
With great pleasure we announce that we will be joining the Valmont Telecom team! As of today, Valmont has entered into an agreement with Ericsson to acquire ConcealFab. We are confident this acquisition will open the gateway to groundbreaking new technologies and unparalleled innovation. Valmont is a global leader in Infrastructure including Telecommunications, Lighting, and […]
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PIM interference in 3.45 GHz spectrum
Auction 110 concluded in January 2022 with bidders spending $22.5B to acquire 100 MHz of mid-band spectrum in the 3.45 GHz to 3.55 GHz frequency range. This band is referred to as the Department of Defense (DoD) band since use of this spectrum was previously limited to “Federal” applications. In total, there is now 530 […]
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PIM Shield® Paint & PIM Seal™ Caulk
It has taken more than 3 years to develop, but it’s finally here! PIM Shield® Paint & PIM Seal™ Caulk are new liquid RF barrier products from ConcealFab designed specifically for reducing external PIM at cell sites. These new materials create effective and reliable RF shields able to reduce energy arriving at covered PIM sources. […]
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Low PIM RF Safety Signs
As stated in previous posts, loosely touching metal surfaces above, below, and behind base station antennas are a common source of external Passive intermodulation (PIM) at cell sites. While the metal brackets used to support cables are the most common source of PIM found near antennas, other external PIM sources are also present. One such […]
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Inc. 5000 Recognized
For the third year in a row, ConcealFab has been selected as an Inc. 5000 fastest-growing private company. Leading the innovation of 5G infrastructure and RF solutions is what continues to set ConcealFab apart. Evolving to the ever-changing needs of the wireless industry, our ability to design, manufacture and meet specific industry demands is what […]
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PIM interference in C-Band networks
C-band is the designation given by the IEEE for radio frequency (RF) spectrum in the 4 GHz to 8 GHz frequency range. Historically, this spectrum has been used for satellite communications with uplink frequencies between 5.925 GHz and 6.425 GHz and downlink frequencies between 3.7 GHz and 4.2 GHz. A portion of the C-band downlink […]
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External Passive Intermodulation (PIM)
Passive intermodulation (PIM) is a problem for network operators that is not going away anytime soon. In fact, it’s getting worse. To review, PIM is interference created when the transmit signals at a site mix at “non-linear” objects in the RF path and generate new frequencies. If these new frequencies fall in an operator’s uplink […]
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Multi-Function Mounting System
ConcealFab’s PIM Shield® Multi-Function Mounting System provides a low-cost, low PIM method to secure cables to round or angle members at cell sites. LEARN MORE HERE
