Abstract: Rare earth metal containing compounds of the formula Sr2YbSbO6 have been prepared with high critical temperature thin film superconductor structures, and can be fabricated into a superconductor insulator superconductor step edge Josephson junction, as well as being used in other ferroelectrics, pyroelectrics, and hybrid device structures.

Abstract: Rare earth metal containing compounds of the formula Sr2LuSbO6 and Sr2LaSbO6 have been prepared as high critical temperature thin film superconductor structures, and can be used in other ferroelectrics, pyroelectrics, piezoelectrics, and hybrid device structures.

Abstract: Rare earth metal containing compounds of the general formula Sr2RESbO6, wherein RE is a rare earth metal, have been prepared as dielectric substrates and buffer layers in thin film superconductor structures, and can be used in other ferroelectrics, pyroelectrics, piezoelectrics, and hybrid device structures.

Abstract: Rare earth metal containing compounds of the formula Sr2LuSbO6 have been prepared with high critical temperature thin film superconductor structures, and can be fabricated into an antenna, as well as being used in other ferroelectrics, pyroelectrics, piezoelectrics, and hybrid device structures.

Abstract: Burnout resistance ferroelectric material is used in the feedback path of a microwave oscillator as a frequency control element. The ferractor has rapid broadband frequency tuning capabilities limited only by the speed of an external DC source.

Abstract: Rare earth metal containing compounds of the general formula Sr2RESbO6, wherein RE is a rare earth metal, have been prepared with high critical temperature thin film superconductor strucutures, and can be used in other ferroelectrics, pyroelectrics, piezoelectrics, and hybrid device structures.

Abstract: A radar system has a transceiver and a ferroelectric phased array antenna. The antenna includes a plurality of radiating elements each connected to a ferroelectric phase shifter. The transceiver and the phase shifters are coupled for conveyance of radio frequency signals therebetween. A beam control computer calculates phase shifter control voltages which are applied to a beam correction computer. A temperature sensor is coupled to each phase shifter to provide feedback temperature values to the beam correction computer. A data table in the beam correction computer provides phase shifter correction voltages as a function of control voltage amplitudes and temperature values. The beam correction computer uses the data table in determining temperature corrected phase shifter control voltages which are applied to the associated phase shifters.

Abstract: A phase shifter for electrically adjusting the down-tilt of an antenna, based on rotating at least one phase wheel having a specially shaped dielectric. Each phase wheel is rotatably mounted between a stripline and the metallic ground plane of a feed system for an RF signal communicating the RF signal between each element of the antenna and a common terminal. The dielectric distributed on each phase wheel is shaped so that as the phase wheel is turned mechanically, the amount of dielectric directly beneath the stripline and above the metallic ground plane either increases or decreases in some proportion to the amount (angular displacement) the wheel is turned. All the phase wheels used in a system can be arranged, oriented, and tractively coupled so as to rotate in synchrony under the action of a single drive, which may itself be driven by a stepper motor for accurate, fine control.

Abstract: Telecommunication systems and methods for driving a phased-array antenna ing a plurality of spaced antenna elements that radiate and receive a beam of radio frequency signals. Each of a plurality of ferroelectric phase shifters connect to a different one of the antenna elements. A signal processor system, having a receiver and a frequency synthesizer communicates with the phase shifters under the control of a data processor system. A joystick connects to the data processor system for permitting manual input of beam steering information thereto. The data processor system responds to the joystick inputs by controlling the relative phase shifts of the signals propagating in the ferroelectric phase shifters. The system further includes a temperature sensor circuit for sensing the temperature of each of the ferroelectric phase shifters.

Abstract: A ferroelectric phase shifting antenna array consists of a plurality of lrally spaced antenna patches which have respective ferroelectric components abutting an edge of each patch at a near central location on the edge to provide impedance matching. DC control power lines are connected to the center voltage null position of the resonant mode of the antenna patch. An Rf source is connected to the other ends of the ferroelectric components through quarter wave coupled lines which provides simultaneous impedance matching and DC isolation.

Abstract: A phase shifter having a single or monolithic ferroelectric material and a lurality of ferroelectric transmission lines formed thereon, each having a different effective physical length and associated delay or phase shift. The plurality of different lengths of ferroelectric transmission lines has a voltage source associated therewith for applying a predetermined bias voltage, resulting in a change in permitivity in the ferroelectric substrate material. The different lengths of ferroelectric transmission line formed on the single substrate have a predetermined relationship between their effective physical linear lengths. By selectively activating the different lengths of ferroelectric transmission line by applying a bias voltage in different combinations, a desired or predetermined phase shift is obtained. The single or monolithic ferroelectric substrate used greatly reduces the overall length of the ferroelectric phase shifter.

Abstract: A high voltage direct current power supply having feedback control and a tection circuit for maintaining a controlled, stabilized output voltage. An oscillator is coupled to a transformer which in turn is coupled to a voltage multiplier. A feedback control is coupled to the transformer and the voltage multiplier which provides feedback to the transformer for maintaining an accurate, stable output voltage. Coupled to the feedback control is a protection circuit which prevents the output voltage from exceeding a predetermined output voltage. Additionally, the protection circuit shuts down the power supply if a short circuit occurs at the output. In one embodiment, the voltage multiplier is comprised of a plurality of voltage doubler diode and capacitor pairs. The feedback control is comprised of a comparitor and a buffer which drives a transistor coupled to the primary of the transformer, which acts as a feedback loop. The protection circuit includes a J-K flip-flop.

Abstract: A system that provides an automated simultaneous measurement of the electal characteristics of a ferromagnetic material as a function of temperature and electric potential. The system utilizes a personal computer that interfaces with a DUT fixture through an interface measuring circuit that provides a means for remote control of the measurement process and insures a more timely and less manually intensive measuring process. The interface measuring circuit is composed of a temperature measuring circuit for measuring the temperature applied to the DUT, a capacitor measuring circuit for measuring the electric potential applied to the DUT, a high voltage power supply, a temperature plate power supply, a high voltage power supply driver, a digital voltage meter (DVM), and a DVM multiplexer. The system can utilize a humidity-free "dry" chamber (i.e. a desiccation chamber) to insure that the measurements of the DUT are reliable and accurate.

Abstract: A ferroelectric phase shifter for shifting the phase of a radio frequency F) signal. The phase shifter includes a conductor line, a ground plane and a ferroelectric element between the conductor line and the ground plane to form a microstrip circuit through which the RF signal propagates. The ferroelectric element has a dielectric constant that can be varied as a function of a DC voltage applied to the ferroelectric element wherein the speed of the RF signal propagating through the ferroelectric element is a function of the dielectric constant. The phase shifter further includes a DC voltage source connected across the conductor line and the ground plane. The DC voltage source applies a variable DC voltage to the ferroelectric element in response to a control signal thereby to vary the dielectric constant of the ferroelectric element.

Abstract: A device for measuring the electrical characteristics of a ferromagnetic erial as a function of temperature, such as its dielectric constant verses temperature characteristics. The device having a quick mount fixture that utilizes a gravity feed and thermal grease to insure a quick reliable thermal connection between the temperature controller and the device under test (DUT). In addition, the device can be remotely controlled by a computer to automate the measuring procedure, thus reducing measuring time and alleviating the intensive manual procedure of making such measurements. Moreover, the device is easily mountable in a humidity-free or desiccation chamber to insure the measurements are reliable and accurate.

Abstract: A ferroelectric phase shifter, especially for the X-band, may be made from n elongated slab of ferroelectric material, which has a high dielectric constant that can be varied by applying an electric field. A narrow signal conductor is formed extending across a first surface of the slab, and a ground plane conductor is formed an opposite surface, forming a microstripline. An overall RF phase shifting circuit can be made by forming input and output circuits corresponding to the above-described signal conductor and interposing and connecting the signal conductor between the input and output circuits. The input and output circuits can be formed on respective, discrete substrates, with the ferroelectric slab being interposed between the substrates, or the input and output circuits can be formed on a common substrate, with the ferroelectric material inserted into a slot formed in the common substrate.

Abstract: A planar stripline type of ferroelectric phase shifter which includes a set f series coupled phase shifter sections, each having mutually different and binary weighted lengths of ferroelectric phase shifting material. Fixed amplitude control voltages are respectively applied to one or more lengths of ferroelectric material the permittivity and effective electrical length of which change to provide a desired composite phase shift. The phase shifter, moreover, employs half wavelength spacings between elements or matching networks therebetween so that the microwave signal propagating through the phase shift will be minimally impeded between the input end and an output end.

Abstract: A DC high voltage block comprising coupled lines etched upon a substrate and covered with a bubble-free, polyurethane insulating layer. The polyurethane insulating layer prevents DC voltage breakdown through air. This DC voltage block provides a planar, noncomplex circuit that can effectively provide voltage blockage up to 4500 volts. High voltage DC blocks of this nature have applications in vacuum tubes and IMPATT devices, as well as ferro-electric or electro-optic phase shifters. They are also employed to protect bias tees and electrical devices that employ bias tees.

Abstract: A planar ferro-electric phase shifter which is compatible with commonly-u microwave transmission media to include microstrip, inverted microstrip, and slot line. The ferro-electric material, Ba.sub.x Sr.sub.1-x TiO.sub.3, which has a high dielectric-constant, is the phase shifting element. In the microstrip embodiment, the microstrip circuit consists of a ferro-electric element interposed between a conductor line and a ground plane. A DC voltage is applied between the conductor line and the ground plane, thereby controlling the dielectric constant of the ferro-electric material. The dielectric constant of the ferro-electric element in turn controls the speed of the microwave signal, which causes a phase shift. Microwave energy is prevented from entering the DC supply by either a high-impedance, low pass filter, or by an inductive coil. DC voltage is blocked from traveling through the microstrip circuit by a capacitive high-voltage DC bias blocking circuit in the ground plane.

Abstract: An improved solder is provided by imbedding solder with metallized fibers. he improved solder is then used to bridge a nonmetallic gap between two separated metallic surfaces by placing the improved solder on the gap and then applying heat to cause the improved solder to melt and flow and bridge the gap and connect the two separated metallic surfaces.