Abstract: A low-PIM cable support rail assembly includes a metal strut extending in a longitudinal direction positioned within a potential PIM reactive zone of a cellular base station antenna. A channel runner assembly slidably engaged with the strut includes a low-PIM a low-PIM spacer and a low-PIM channel runner block that includes a captured rod anchor, such as a nut or bolt head, engaged with a threaded rod. A compression nut engaged with the threaded rod releasably pinches strut rails between the low-PIM channel runner block and the low-PIM spacer to secure the channel runner assembly at a desired position along the strut. The low-PIM channel runner block and low-PIM spacer prevent metal-to-metal contact when the compression nut is tightened to secure the channel runner assembly to the strut. A cable support block or other component may be spaced apart from the strut along the threaded rod.

Abstract: A low-PIM cable support rail assembly includes a metal strut extending in a longitudinal direction positioned within a potential PIM reactive zone of a cellular base station antenna. A channel runner assembly slidably engaged with the strut includes a low-PIM a low-PIM spacer and a low-PIM channel runner block that includes a captured rod anchor, such as a nut or bolt head, engaged with a threaded rod. A compression nut engaged with the threaded rod releasably pinches strut rails between the low-PIM channel runner block and the low-PIM spacer to secure the channel runner assembly at a desired position along the strut. The low-PIM channel runner block and low-PIM spacer prevent metal-to-metal contact when the compression nut is tightened to secure the channel runner assembly to the strut. A cable support block or other component may be spaced apart from the strut along the threaded rod.

Abstract: Low-PIM polymeric cable support brackets are used to support cables feeding antennas and other types of equipment at cellular base stations (cell sites). A variety of polymeric mounting brackets, cable ties, cable support blocks, and stackable hangers are used to eliminate loose fitting metal-to-metal contact points that tend to create PIM. The mounting bracket body may include standoff features allowing the same bracket to securely attach to poles of different diameter, an external hex profile for receiving a wrench, and a fitted receptacle for receiving a bracket end fastener to facilitate installation. Polymeric cable ties fed through cable slots in the mounting bracket may be positioned to prevent the bracket end fastener from falling out of the fitted receptacle. The low-PIM cable support brackets are suitable for use within one carrier wavelength behind and around base station antennas where conventional cable brackets have been identified as problematic PIM interference sources.

Abstract: A ventilated seat includes a cushion with an air channel extending from a cushion B-side. The ventilated seat also includes a spacer that defines one or more air passages. The air passages are connected to the air channel and to one or more air distribution holes on a cushion A-side. The ventilated seat further includes a cover layer located between the spacer and the cushion A-side. The cover layer is made of a foam material while the spacer is made of a different material and the cover layer and the spacer are a foam with integrated air passages.

Abstract: A stackable, low-PIM cable hanger includes a hybrid metal-and-polymeric construction including a metal cable block carrying a polymeric sleeve. The metal cable block forms the cable mounting section, while the polymeric sleeve insulates the metal sides of the cable block and provides non-metallic (low-PIM) snap-in legs for attaching the cable hanger to mounting structures and stacking the cable hangers together. The metal cable block supports the cable more securely than a polymeric mounting section, while the polymeric sleeve avoids loose metal-to-metal connections when the cable hangers are attached to metal mounting structures or stacked together. The metal cable block includes a metal sides that form cable clasps. The sleeve includes polymeric sides that cover the metal sides of the cable block to prevent metal-to-metal contact on the sides of the cable block.

Abstract: The present invention meets the needs described above through low-PIM universal antenna equipment mounts and associated assemblies for use at cell sites. The universal mounts are typically deployed in antenna equipment assemblies located in the nearfield reactive region behind the base station antennas. The mounts suppress PIM generation as compared to conventional equipment mounts even though the universal mounts are located well outside the main beam of the base station antenna. An illustrative universal mount includes a pressure bushing with a cap that includes a pair of parallel rails to stabilize the bushing on a metal mast. The rails allow the pressure bushing to transfer the load of the supported equipment to the curved surface of round cylindrical masts irrespective of the pipe diameter within the typical range of mast diameters, such as 2 inches to 6 inches in diameter.

Abstract: A low-PIM, stackable polymeric cable hanger spacer that includes a polymeric base forming a rim that defines a latch surface for capturing locking metal barbs of interface brackets of a metal snap-in cable hanger. The spacer also includes polymeric legs extending from the polymeric base with polymeric barbs for latching to an adjacent snap-in cable hanger or other support member. The base allows the metal barbs to pass through the base when the metal barbs are deflected or compressed toward each other. and then allows the metal barbs to spring back to engage the latch surface and become captured by the polymeric spacer once the metal barbs clear of the rim. The base may have a round toroidal shape with rounded edges allowing the metal snap-in cable hanger to rotate with respect to the spacer.

Abstract: A stackable, low-PIM cable hanger includes a hybrid metal-and-polymeric construction including a metal cable block carrying a polymeric sleeve. The metal cable block forms the cable mounting section, while the polymeric sleeve insulates the metal sides of the cable block and provides non-metallic (low-PIM) snap-in legs for attaching the cable hanger to mounting structures and stacking the cable hangers together. The metal cable block supports the cable more securely than a polymeric mounting section, while the polymeric sleeve avoids loose metal-to-metal connections when the cable hangers are attached to metal mounting structures or stacked together. The metal cable block includes a metal sides that form cable clasps. The sleeve includes polymeric sides that cover the metal sides of the cable block to prevent metal-to-metal contact on the sides of the cable block.

Abstract: Low-PIM polymeric cable support brackets used to support cables feeding antennas and other types of equipment at cellular base stations (cell sites). A variety of polymeric mounting brackets, cable ties, cable support blocks, and stackable hangers are used to eliminate loose fitting metal-to-metal contact points that tend to create PIM. The mounting bracket body may include standoff features allowing the same bracket to securely attach to poles of different diameter, an external hex profile for receiving a wrench, and a fitted receptacle for receiving a bracket end fastener to facilitate installation. Polymeric cable ties fed through cable slots in the mounting bracket may be positioned to prevent the bracket end fastener from falling out of the fitted receptacle. The low-PIM cable support brackets are suitable for use within 1 carrier wavelength behind and around base station antennas where conventional cable brackets have been identified as problematic PIM interference sources.

Abstract: An apparatus and a system is provided that may be utilized to determine oil migration and oil displacement from a pre-oiled air filter. The present invention may also be utilized to determine if oil is displaced from the air filter onto a portion of the apparatus for visualization to a user. The present invention utilizes a demonstration apparatus having a system for forcing air through the oil subjected air filter thereby attempting to force displacement of the oil from the air filter. The apparatus utilizes a blowing means whereby the oil infused air filter is subject to higher than normal air flow and whereby the apparatus has a deflection portion whereby if oil is displaced from the air filter, it is deflected onto the deflection portion where it would be physically viewable to an observer present in the vicinity of the apparatus.

Abstract: An apparatus and a system is provided that may be utilized to determine air flow through an air filter and/or a plurality of air filters. The present invention utilizes a demonstration apparatus to illustrate the differences in air flow and air restriction between a plurality of different air filters and filtration media. The apparatus and system utilizes a common plenum which subjects the plurality of air filters to the same differential pressure. The air flows through a first side of the air filter and is measured on the second side of the air filter by utilizing a wind meter or similar device to gauge the amount of air flow velocity of the second side of the filter. Additionally, the apparatus and system utilizes a display means to illustrate the differing air velocity through the second side of the air filter.

Abstract: An apparatus and a system is provided that may be utilized to determine oil migration and oil displacement from a pre-oiled air filter. The present invention may also be utilized to determine if oil is displaced from the air filter onto a portion of the apparatus for visualization to a user. The present invention utilizes a demonstration apparatus having a system for forcing air through the oil subjected air filter thereby attempting to force displacement of the oil from the air filter. The apparatus utilizes a blowing means whereby the oil infused air filter is subject to higher than normal air flow and whereby the apparatus has a deflection portion whereby if oil is displaced from the air filter, it is deflected onto the deflection portion where it would be physically viewable to an observer present in the vicinity of the apparatus.

Abstract: An apparatus and a system is provided that may be utilized to determine air flow through an air filter and/or a plurality of air filters. The present invention utilizes a demonstration apparatus to illustrate the differences in air flow and air restriction between a plurality of different air filters and filtration media. The apparatus and system utilizes a common plenum which subjects the plurality of air filters to the same differential pressure. The air flows through a first side of the air filter and is measured on the second side of the air filter by utilizing a wind meter or similar device to gauge the amount of air flow velocity of the second side of the filter. Additionally, the apparatus and system utilizes a display means to illustrate the differing air velocity through the second side of the air filter.