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| Number | Title | Issue Date |
| 4862117 | Compact millimeter wave microstrip circulator A millimeter wave microstrip Y-junction circulator is provided comprising a ection of microstrip dielectric substrate having a cone-shaped ferrite element mounted on one side thereof together with three, Y-junction oriented sections of microstrip conductor... | 08/29/1989 |
| 4859969 | Single transistor dual mode crystal oscillator(U) A single transistor dual mode crystal oscillator circuit is described which may excite more than one C-mode frquency in a crystal simultaneously such as the fundamental, used as a clock driver frequency, and a beat frequency between the third harmonic and... | 08/22/1989 |
| 4859965 | Optical gain control of GaAs microwave monolithic integrated circuit distributed amplifier An optical gain control circuit for controlling the gain of a GaAs MMIC dributed amplifier having a dc gain control is provided. Variable intensity light from a controlled LED is directed to the surface of a GaAs multi-finger FET by means of an optical f... | 08/22/1989 |
| 4845449 | Millimeter wave microstrip modulator/switch A microstrip switch is provided comprising a rectangular ferrite rod having pair of ramp-shaped dielectric waveguide members at the ends thereof. The ramp members are made of dielectric waveguide material having a dielectric constant which is substantiall... | 07/04/1989 |
| 4843357 | Tetrahedral junction waveguide switch A tetrahedral junction waveguide switch is provided having two axially juxtaposed sections of hollow rectangular waveguide which are mutually cross-polarized by being rotated 90 degrees with respect to each other. A rod of a ferrite material having gyroma... | 06/27/1989 |
| 4839659 | Microstrip phase scan antenna array A microstrip phase scan antenna array is provided having a columnar array microstrip radiating patches mounted on a dielectric substrate. Each column of the array is fed by a separate variable, reciprocal ferrite rod phase shifter which is mounted on the... | 06/13/1989 |
| 4816787 | Millimeter wave microstrip phase shifter A microstrip reciprocal phase shifter is provided comprising a rectangular ferrite rod having an upwardly sloping ramp member at one end thereof and a downwardly sloping ramp member at the other end thereof. The ramp members are made of dielectric wavegui... | 03/28/1989 |
| 4806886 | Microstrip resonance isolator A microstrip resonance isolator is provided comprising a dielectric waveguide element which is mounted on the top surface of a length of microstrip transmission line dielectric substrate having an electrically conductive ground plane on the bottom surface... | 02/21/1989 |
| 4785304 | Phase scan antenna array A phase scan antenna array for planar radar scanning in a single plane with pencil-shaped beam is provided comprising a plurality of ferrite rod line source antennas. Each rod antenna has a plurality of beam-emitting slots spaced along one side thereof an... | 11/15/1988 |
| 4777454 | Switchable dielectric waveguide circulator A switchable dielectric waveguide circulator is provided for millimeter wave frequency applications comprising a ferrite right prism having two polygonal prism bases and at least three lateral prism faces. A control wire is threaded through a number of bo... | 10/11/1988 |
| 4773138 | Method of producing transducer isolation in surface acoustic wave processor An improved manufacturing technique for producing a certain class of Surf Acoustic Wave (SAW) devices, namely those having input and output transducers in close proximity. A much higher manufacturing yield results from eliminating the cutting of a slot i... | 09/27/1988 |
| 4761560 | Measurement of proximity effects in electron beam lithography A test pattern which is applied to a wafer or mask by electron beam lithophy for measuring proximity effects. The pattern comprises two lines which intersect at a small angle, for example 1° so that the proximity effects of the two lines combine within ... | 08/02/1988 |
| 4755827 | Millimeter wavelength monolithic ferrite circulator/antenna device A millimeter wavelength monolithic ferrite circulator/antenna device is pided comprising a four-sided ferrite rod having one end which is to be selectively coupled to millimeter wavelength radar transmitter and receiver apparatus and the other end couple... | 07/05/1988 |
| 4754237 | Switchable millimeter wave microstrip circulator A millimeter wave switchable microstrip Y-junction circulator is provided comprising a monlithic, wye-shaped ferrite element disposed on one surface of a section of microstrip dielectric substrate having three, Y-junction oriented sections of microstrip c... | 06/28/1988 |
| 4749966 | Millimeter wave microstrip circulator A millimeter wave microstrip Y-junction circulator is provided comprising a monolithic, wye-shaped ferrite element disposed on one surface of a section of microstrip dielectric substrate having three, Y-junction oriented sections of microstrip conductor o... | 06/07/1988 |
| 4746926 | Phase scan antenna A phase scan antenna suitable for millimeter wave radar applications is pided comprising a four-sided ferrite rod having a series of electromagnetic energy emitting slots along one side of the rod. The remaining three rod sides are enclosed by a metal, c... | 05/24/1988 |
| 4745377 | Microstrip to dielectric waveguide transition A microstrip to dielectric waveguide transition is provided comprising a gth of rectangular dielectric waveguide which has one end tapered in such a manner that the height of the waveguide top surface above the waveguide bottom surface decreases linearly... | 05/17/1988 |
| 4719640 | Multiple parallel RF excited CO2 lasers Dual waveguide lasers which are transversely excited in parallel from a con source of radio frequency are provided with one or more channels or bores connecting the laser cavities. The dimensions and configuration of the connecting channels are chosen so... | 01/12/1988 |
| 4716444 | Optical radar transceiver control apparatus The apparatus is part of an optical radar set and comprises a high powered O2 pulsed transmitter laser which is injection controlled to operate at a fixed frequency offset from a lower powered CO2 local oscillator laser. A portion of ... | 12/29/1987 |
| 4691208 | Ferrite waveguide scanning antenna A phase-scan antenna apparatus including a rod-shaped ferrite dielectric eguide having two non-ferrite dielectric ends, and means for applying a variable magnetic field to the ferrite section.... | 09/01/1987 |
| 4655588 | Injection controlled laser transmitter with twin local oscillators A heterodyne CO2 optical Doppler radar comprising a ring type of traitter laser and twin local oscillator lasers which are automatically controlled to operate at a difference frequency equal to the intermediate frequency of the radar, which ma... | 04/07/1987 |
| 4613941 | Routing method in computer aided customization of a two level automated universal array A routing method implemented in the stored programs of a digital computer ich is programmably operated to generate the wire interconnect masks for a two level metallization automated universal array having undefined roadbeds between rows of cells comprise... | 09/23/1986 |
| 4602190 | Semiconductor multipactor device The placement of one or a pair of suitably biased thin semiconductor epital layers on the secondary emission surface of a multipactor device provides an improvement of devices which operate in accordance with the principle of multipactoring. A multipacto... | 07/22/1986 |
| 4572662 | Wire and wire like object detection system An optical radar operating in the infrared region of the spectrum and adad to efficiently detect elongated targets such as wires. The pulsed transmitter is preferably passively Q-switched and produces optical pulses polarized in one direction. A CW local... | 02/25/1986 |
| 4568822 | Apparatus for determining SMR codes Apparatus for determining the levels or echelons of a multi-character code f a supply source, maintenance and recoverability (SMR) code for component items in a parts inventory for military equipment comprising a circular code wheel including a first circu... | 02/04/1986 |
| 4558336 | MBE Growth technique for matching superlattices grown on GaAs substrates Misfit dislocation density at an InAs-GaAs interface is reduced in both InAs-GaSb and In1-x Gax As-GaSb1-y Asy superlattices grown on GaAs substrates by means of an MBE (molecular beam epitaxy) growth technique ... | 12/10/1985 |
| 4547887 | Pseudo-random convolutional interleaving A method and apparatus for interleaving and deinterleaving psuedo-randomly a digital signal which is transmitted over a transmission channel is disclosed. A received bit stream is interleaved such that the order of the bits is varied in a non-random manne... | 10/15/1985 |
| 4539682 | Method and apparatus for signaling on-line failure detection Method and apparatus permitting a multi-module digital system, such as a puter, having built-in test hardware associated with each module, including a plurality of signal processing units to communicate over two wire circuitry not only the existence of a... | 09/03/1985 |
| 4538123 | Dielectric waveguide bandpass apparatus A millimeter wavelength bandpass filter arrangement is produced by using a first dielectric waveguide as an input for a broadband signal to a ferrite circulator. This signal is delivered to a second dielectric waveguide having a bandstop filter formed the... | 08/27/1985 |
| 4536768 | Coaxial power dissipation line A termination for a VHF inverted-V half-rhombic antenna is described, consisting of a transformer terminated into a length of high attenuation coaxial cable acting as a power dissipation line.... | 08/20/1985 |
| 4527081 | Overshoot predriven semi-asynchronous driver An output driver circuit for fast memories and microprocessors and the li The driver circuit is responsive to a binary input voltage and includes first and second signal control paths respectively coupled to a pair of series connected output stage transi... | 07/02/1985 |
| 4523188 | Automated map and display alignment Apparatus and a method are shown for automatically aligning a map with fi topographic and other features therein with an underlying display on which appear electronically produced symbols which must register with the map features. The misalignment of the... | 06/11/1985 |
| 4519079 | Error correction method and apparatus Circuitry and a method for correcting errors in binary data which is stored n memory and subject to errors upon recall therefrom. The technique involves generating a redundant byte related to each original byte to be stored, storing both bytes in memory, a... | 05/21/1985 |
| 4517047 | MBE growth technique for matching superlattices grown on GaAs substrates Misfit dislocation density at an InAs-GaAs interface is reduced in both I-GaSb and In1-x Gax As-GaSb1-y Asy superlattices grown on GaAs substrates by means of a MBE (molecular beam epitaxy) growth technique con... | 05/14/1985 |
| 4513338 | Whip antenna high voltage protection device A high voltage protection device for protecting personnel from injury or th as well as damage to radios and vehicles when a whip antenna comes in contact with overhead high voltage power lines or the like and comprises a high voltage coaxial capacitance ... | 04/23/1985 |
| 4510500 | Aircraft shorted loop antenna with impedance matching and amplification at feed point An active antenna system for an airborne high frequency single sideband receiver comprised of a shorted loop type antenna having an inductive characteristic over the frequency range of 2.0 to 10.0 MHz and which is tuned to resonance at a selected operatin... | 04/09/1985 |
| 4504791 | Sampling frequency converter A method and apparatus for frequency conversion comprising sampling an input signal having a first frequency with first time delays between samples in an input delay line, and distributing the samples of the input signal in sequence to an output delay lin... | 03/12/1985 |
| 4501319 | Piezoelectric polymer heat exchanger Disclosed is apparatus for providing for increased heat transfer efficiency f a heat exchanger by separating contiguous fluid conductive channels by means of a flexible sheet fabricated from a piezoelectric polymer. An electrode pattern of predetermined co... | 02/26/1985 |
| 4500963 | Automatic layout program for hybrid microcircuits (HYPAR) A computer program for the fully automatic layout of hybrid microcircuits. he program, under certain options, guarantees one-hundred percent routing connectivity for components ranging from discretes to VLSI. Special features such as bottom-up or top-down ... | 02/19/1985 |
| 4494091 | Damping package for surface acoustic wave devices A surface acoustic wave (SAW) device is fabricated to minimize or eliminate purious signals caused by bulk modes. A backing layer is provided on the bottom surface of the crystal substrate of the SAW device having an acoustic impedance nearly the same as t... | 01/15/1985 |
