Founded in 1967 by an engineer and ham-radio enthusiast, STI-CO Industries remains known for solving the low-visibility communication challenges faced by law enforcement. From its Orchard Park, New York, facility, the U.S. manufacturer develops custom RF antenna systems and rugged interconnects for organizations operating in demanding public-safety, defense, and transportation environments. Its quality systems are certified to AS9100D and ISO 9001:2015.
AS9100D
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ISO 9001:2015
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ITAR Registered
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SAM Registered
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RoHS Compliant
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IPC/WHMA-A-620 Conformance
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Buy America Compliant
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D-U-N-S Registered
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MP AntennaFrom its Elyria facility near Cleveland, MP Antenna designs and manufactures patented multi-polarized antennas and RF hardware for reliable connectivity in challenging non-line-of-sight environments. The privately held company develops standard and custom solutions under one roof, taking projects from concept and prototyping through testing, validation, and production. All products are made in the USA, with an ISO 9001 quality system supporting applications ranging from public safety to transportation communications.ELYRIA, OH
TX RX Systems, IncFounded in 1976 in Angola, New York, TX RX Systems designs and manufactures RF-conditioning hardware and provides engineering services for Land Mobile Radio networks. Its engineers developed the T-Pass transmitter combiner and tower-top amplifier, innovations now used across mission-critical public-safety and enterprise communication systems. TX RX continues to build customized, American-made solutions for OEMs and radio-network operators under ISO 9001:2015 and RoHS certification.ANGOLA, NY
Antenna Research Associates, IncSince 1963, Antenna Research Associates has built its identity around solving demanding communications and national-security challenges with engineered antenna technology. The Laurel, Maryland company now combines manufacturing with engineering and testing, serving mission-critical defense customers from an 80,000-square-foot headquarters and facilities elsewhere in New England. ARA is certified to ISO 9001:2015 and operates in accordance with AS9100 standards.LAUREL, MD
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