Since 1963, Ebensburg-based SWR, LP has designed and manufactured FM and TV broadcast antennas, transmission-line equipment, and related parts. The company grew from supervising RF installations and field warranty work into an international broadcast specialist, developing its patented Thermocoupled rigid coaxial line in 1972 and later adding high-power antenna systems for UHF, DTV, and FM applications. SWR also maintains field-service capabilities, drawing on an in-house manufacturing facility and projects in more than 35 countries.
Propagation Systems, IncPropagation Systems, Inc. (PSI) manufactures broadcast antenna systems and related radio-frequency infrastructure for broadcasters. Founded in 1996, the company says its Pennsylvania factory is a 20,000-square-foot facility where it designs, develops, manufactures, and tests its systems.EBENSBURG, PA
EM AntennasFounded in 1963, EM Antennas designs and manufactures custom, high-performance RF antennas for military and commercial communication systems, with particular depth in rugged ultrawideband technology for electronic warfare and signal intelligence. The Johnstown company supplies mission-critical systems to defense contractors, government integrators and commercial users, and guarantees every antenna to its stated performance specifications. EM Antennas is ISO 9001:2015 certified and HUBZone certified; its rugged products include MIL-STD-810H-tested designs, and its EM-6841 antenna received a Platinum honor in the 2025 Military + Aerospace Electronics Innovators Awards.JOHNSTOWN, NY