Rockwell Collins, Inc.

Scott L Patten

David W Cripe

Don L Landt

Forest P Dixon

James B West

Jeremiah Damien Wolf

Chenggang Xie

A switch comprises two photoconductive semiconductors and two corresponding laser diodes driven by opposing voltage sources. The two photoconductive semiconductors are connected in series between a high and low voltage source with a radio frequency output at a center node between the photoconductive semiconductors. Each photoconductive semiconductor may include one ohmic contact and one schottky contact for superior bandwidth and efficiency.

Photoconductive semiconductor amplifier and switch

A distributed power amplifier may include a plurality of switching power amplifier sub-circuits, and a plurality of connection network sub-circuits, each of the plurality connection network sub-circuits having a characteristic impedance, wherein each of the plurality of connection network sub-circuits combines two or more of the plurality of switching power amplifier sub-circuits into a parallel or series configuration, wherein the plurality of switching power amplifier sub-circuits, the plurality of connection network sub-circuits and the characteristic impedance of each of the plurality of connection network sub-circuits are configured to present each of the plurality of switching power amplifier sub-circuits with a substantially equivalent load impedance.

Tapered-impedance distributed switching power amplifier

A power digital to analog converter may include a course-resolution digital to analog converter for converting a first segment of binary digits into a first analog output having a first voltage. The power digital to analog converter may also include a fine-resolution digital to analog converter connected in series with the course-resolution digital to analog converter. The fine-resolution digital to analog converter may be configured for converting a second segment of binary digits into a second analog output having a second voltage. The first voltage and the second voltage may be added together to produce an analog output signal representing the binary digits.

Voltage-mode, series-connected, segmented, optically-isolated, power digital-to-analog converter

Tapered-impedance distributed switching power amplifiers

A system for transmitting a broadband signal over an electrically short antenna which includes a plurality of switched impedance synthesis transmit antenna matching circuits which are dynamically controlled with knowledge of the transmitting broadband signal to match the dynamic impedance of the electrically short antenna during transmission.

Switched impedance synthesis transmit antenna matching system for electrically small antenna radiators

The present invention is a system for providing an optimal power match to an output of an amplifier using a matching network. The system may include a Field-Effect Transistor (FET) amplifier and a load. The system may further include a coupled line matching network connected to and between the FET amplifier and the load. The coupled line matching network may be configured for providing an optimal power match to the FET amplifier in the K band of operation.

High efficiency millimeter wave field-effect transistor (FET) amplifier with coupled line matching network

The present invention is a tunable multi-element network for providing impedance transformation. The network may include a first switched capacitor power load modulator circuit and a second switched capacitor power load modulator circuit. The network may further include a series inductive component configured for connecting to at least one of the first power load modulator circuit and the second power load modulator circuit. The network may be further configured for connection to a transmit antenna and a power amplifier. The network may be further configured for receiving an arbitrary impedance from the antenna. The network may be further configured for synthesizing an arbitrary capacitive reactance based on a dynamically controllable phase angle between a switch drive signal provided by the network and an incident Radio Frequency (RF) signal. The network may be further configured for matching the antenna impedance to the power amplifier via the arbitrary capacitive reactance.

Growing community of inventors

Marion, IA, United States of America

Scott L Patten