Raytheon Company

Robert L Moran

Francis J O'Hara

Troy E Plunk

Alex J Ivanov

Kazimierz Siwiak

A polarization compensating device useful in correcting radome-induced polarization errors in a linearly polarized antenna in a missile is described.

Polarization compensating device for antenna within a radome

A broadband antenna element capable of operating over greater than an octave band of frequencies is disclosed. The element comprises an open-ended rectangular waveguide section having a loop radiator, formed by shorting an insulated probe to one of the broad walls of the waveguide section, disposed therein. Notches are provided in the narrow walls and flanges are provided on the broad walls of the waveguide section for matching purposes. The insulated probe extends through a hole formed in the rear wall of the waveguide section to connect with a stripline feed network.

Broadband antenna element

A device for reducing the backlobe radiation from small aperture antennas is shown to comprise a thin hemispherical radome having both radio frequency energy absorbing and reflecting materials attached thereto. The absoring material dissipates a portion of the edge currents existing on the antenna aperture, while the reflecting material intercepts a portion of the energy radiated from the antenna and reflects that portion back to the edge of the antenna to produce destructive interference with the edge currents.

Growing community of inventors

Rand, CO, United States of America

Robert L Moran