Transmission Line

ERI manufactures a variety of useful installation accessories for the installation of semi-flexible coaxial transmission lines and elliptical waveguides. These include insulated hangers for use on "hot" AM radio station towers, hoisting grip attachment kits and round member and angle member adapters.

GUIDELine™ circular waveguide is the best choice for long vertical runs. It has substantially lower wind loads than equivalent rectangular waveguide, allowing it to be used on towers where rectangular system cannot be used. With attenuation up to 50% lower than corresponding rectangular waveguide, it is the most efficient transmission line available. You may be able to use a smaller, less-expensive transmitter! Unlike truncated elliptical waveguide, on-site tuning is completely eliminated by the use of cross-polarization canceling pins.

For transmitter room applications, inexpensive thin wall rectangular waveguide is a good choice. Pressurizable thick wall rectangular waveguide connects the base of the vertical run to the transmitter building. ERI manufactures a complete line WR1150, WR1500, and WR1800 components, including E-plane and H-plane elbows, miters, and fine matchers.

ERI provides a broad range of products include RF components (either coaxial and waveguide) for combiners, hybrids, diplexers, directional couplers, motorized switches, RF loads, and much more. With the ability to call on decades of previous system designs and configurations and the significant internal engineering and manufacturing expertise ERI can quickly respond to requirements whether they be broadcast, military, or scientific applications.