Raytheon Company

Russell W Hansen

Matthew Fassett

Mark E Russell

John F Toth

John F Mara, Jr

Pietro Ventresca

A radio frequency (RF) amplifier circuit includes an input matching network having a first port coupled to an input port of the circuit. The RF amplifier circuit further includes a high electron mobility field effect transistor (HEMT) having source, gate and drain electrodes with the gate electrode coupled to the second port of the input impedance matching network and means, coupled between the source electrode and a DC reference potential, for providing inductive feedback to the source electrode of the HEMT. The RF amplifier circuit further includes an output matching network having a first port coupled to the drain electrode of the HEMT. The output matching network comprises a first RF propagation network having a first end coupled to the first port of the output matching network and a second end coupled to a first electrode of a capacitor. A second electrode of the capacitor is coupled to a second port of the output matching network. The RF amplifier circuit further includes a monolithic microwave integrated circuit amplifier having an input port coupled to the second port of the output matching network and having an output port coupled to an output port of the RF amplifier circuit.

Radio frequency amplifier circuit

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

A radio frequency switch adapted for operation with radio frequency signals having frequencies above 1,000 MHz is disclosed wherein a pair of strip conductors is disposed in a dielectric between a pair of ground planes, one of such strip conductors being separated from and rotatable with respect to the other one of such strip conductors. The pair of strip conductors is dimensioned to overlap when engaged to effectuate a TEM mode coupling between pairs of ports thereof. Detent means are included to provide an indication when the pair of strip conductors is properly engaged.

Growing community of inventors

Stoughton, MA, United States of America

Russell W Hansen