Andrew Telecommunications Pvt Ltd. Offers Air Dielectric Coaxial Cable. Andrew Telecommunications Pvt Ltd. Supplies solutions that serve traditional wireless networks, third generation technologies, triple-play [voice, data, and video] services, and specialized applications for microwave communications systems. The Air Dielectric Coaxial Cable provides the pressure path to pressurizable microwave antenna feeds and is the recommended feeders for antennas with air dielectric feeds for 2.7 GHz and below. 7/8", 1-5/8" and 2-1/4" are the sizes typically Used.