Raytheon Company

Pietro Ventresca

Matthew Fassett

John F Toth

Francis J O'Hara

Russell W Hansen

Chester J Hunt

Dominic V Restagno

Kenneth R Turner

A dual mode R.F./IR seeker suitable for use in an anti-radiation missile is disclosed. The infrared sensor is responsive to radiation within the 4.0 to 4.8 micron band and the radio frequency sensor is responsive to radio frequency signals within a 6.5 to 16.5 GHz band. The infrared sensor comprises a folded Cassegrainian telescope arrangement, including a primary mirror which is transparent to radio frequency energy. The radio frequency sensor comprises an annular array of orthogonally disposed stripline flared notch radiating elements. A broadband microwave receiver, fabricated in a multilayered stripline package, is provided for forming radio frequency monopulse sum (&#x3a3;) and difference (&#x394;) signals and for converting such radio frequency monopulse signals to suitable intermediate frequency signals for processing in an I.F. receiver. The infrared and radio frequency sensors share a common aperture and optical axis.

Dual mode seeker

An octave band phase shifter/polarization switch is disclosed which is comprised of a plurality of serially coupled phase bits arranged to provide, in combination, a four bit phase shifter and a polarization switch capable of providing any selected one of six separate polarization senses. The device is fabricated in a stripline package and each of the phase bits is comprised of a hybrid coupler whose output ports are terminated in switchable reactances. Either packaged microwave P-I-N or N-I-P diodes are utilized as the switchable reactances, and bias voltage for the diodes is provided by means of an octave band choke, comprising a dielectrically loaded coil disposed within a center dielectric layer of the stripline package.

Phase shifter and polarization switch

Growing community of inventors

Littleton, MA, United States of America

Pietro Ventresca