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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
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PIM Hygiene In Cell Sites

With vast experience conducting external PIM hunts in the field, ConcealFab has identified the most common sources of external PIM found in the high-risk PIM zone near antennas at cell sites. The PIM Hygiene application note identifies the most common PIM sources encountered and provides solutions for mitigation. In addition to the obvious problems, such […]
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New Radiated PIM Testing Standard Expected From IEC

Characterizing the Passive Intermodulation (PIM) performance of mechanical objects like brackets has presented designers with a new radiated PIM testing and measurement challenge.  How do you verify if a bracket design is low PIM when a bracket does not have Radio Frequency (RF) connectors for injecting PIM test signals?   A working group within the International […]
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