Abstract: A dual-frequency microstrip antenna has three strips of bare low-dielectric aterial alternating with two strips of copper-clad (one side) high-dielectric material bonded close together on a copper plate having a feed inserted therethrough. A copper-claded layer (one side) low-dielectric material is placed over the five strips and bonded simultaneously. The inner strips separate the region of high-dielectric constant from the region of low-dielectric constant. The microstrip antenna is considered to be a lossy resonating cavity enclosed by a perfect electric conductor and by a perfect magnetic conductor.

Abstract: The invention offers a novel way to enhance the time of a surveillance paad over a target area. It provides a relatively inexpensive way to position an unmanned reconnaissance payload over a potential target area, using a cargo projectile launched from a conventional tubed artillery piece, under all weather and environmental conditions. The use of tow line between the ejected reconnaissance payload and the ballistic cargo projectile allow the payload with its parafoil to achieve a greater height, enter an orbit and extend a longer time over the target area.

Abstract: Discernible frequency characteristics regarding BPSK and CW signals are dved from consecutive transform outputs of a dual channel chirp-Z processor. Physically separated antennas direct the signals to the chirp-Z channels and concurrently occurring transforms are directed from those channels to a particular phase detector in accordance with the type of signal to which such transforms relate. The selection of phase detector is made through switches which are controlled by logic circuitry in accordance with the discernible frequency characteristics.

Abstract: A Passive Surface Acoustic Wave Identification Tag ("SAW-ID tag") device utilizes pulse compression techniques and a large number of coding possibilities for identifying articles at enhanced ranges. The SAW-ID tag device provides a piezoelectric substrate having bus bars, spaced electrode taps between the bus bars and a built-in antenna, with an input chirped SAW transducer having a dispersive, complementary matched filter response to an input expanded chirp signal from an expanded linear FM chirp waveform actively generated by a nearby chirp transmitter. The input expanded chirp signal is fed into the input chirped SAW transducer through the built-in antenna, to compresses the input expanded chirp signal into a narrow, compressed pulse signal propagating toward the electrodes taps. The spacing of the electrode taps establishes the desired unique time-ordered coding.

Abstract: Synthetic aperture radar imaging for nonlinear trajectories utilizing range relative doppler processing, invariant mapping of information from arbitrary shaped cells onto an X--Y coordinate system, and round trip signal delay which allows accurate synthesis of a reference signal for each range cell. A synthetic signal synthesizer produces the reference signal for synchronous demodulation in the radar.

Abstract: A device is presented for measuring residual stresses in a solid component. he device includes a hardness measuring component which has an indenter for determining hardness at various locations. Stress (.sigma.) data is obtained by converting the hardness measurements according to the formulaa.multidot.[.sqroot.4P.sub.o.sup.2 -3P.sup.2 -P],where a is a constant in Kbar.sup.-1 mm.sup.2 /kg, which depends on the type of material under test and also on the type of indentor used, where the pressure p is measured in kg/mm.sup.2, and where the average pressure p.sub.o is the average value of mean pressure p along a radial cut line of the solid component specimen.

Abstract: A dynamic range tester which simultaneously generates two signals, each of hich is composed of a clean signal plus an excess quantity of independent and isolated random noise is disclosed for use in producing real world signals which can be used to provide a simulated operating environment within which to evaluate the dynamic range or evaluate the processing gain of an electronic or acousto-optic system. The power level of the signal and power level of the noise in each of the two outputs of the dynamic range tester can be independently varied such that a range of signal-to-noise ratios may be set-up in each output.

Abstract: An automatic liquid spraying system extinguishes burning embers and residue emaining after firing of a cannon assembly. The spraying system has nozzles mounted on moveable mounted arm means for spraying the liquid co-axially into the cannon tube breech and projectile area and onto the obturator spindle axis. In one embodiment, external electric and pneumatic powered sources provides the power to operate the system; and in another embodiment, a self-powered squirt gun type hydraulic source provides the power.

Abstract: An improved means for triggering high voltage spark gap devices for current injection and pulse power applications which utilizes the high voltage source itself to trigger the discharge. A switch initially directs current flow from the high voltage source through a trigger resistor which creates sufficient potential difference between a primary electrode and the trigger electrode to fire the spark gap. A second blocking resistor inhibits current flow through the trigger electrode and directs the discharge through the load. The trigger circuit has very little influence on the discharge waveform due to the very high impedance of the resistor string.

Abstract: An electrochemical cell is provided using graphite immersed in molten NaA.sub.4 (mp150.degree. C.) as the cathode, liquid sodium as the anode and .beta. alumina as the sodium ion conducting solid electrolyte to separate the anode and cathode compartments.

Abstract: A hybrid simulation system that provides realistic indoor starlight and mlight simulation. At least two light sources provides light where each is coupled to an aperture so that the light source is focused. At least one variable aperture control is provided for one of the apertures so that variability of that aperture area size can be performed. Fiber optic bundles coupled for each aperture which receives the focused light where each bundle contains at least one fiber optic which provides a light conduit. Each bundle is coupled to an overhead position so that there is directed in a substantially downward direction from the overhead position the bundle. The area is illuminated with a simulated constant starlight and a simulated moonlight that may be varied by varying aperture size.

Abstract: A target simulator device for the simulation of infrared targets as input to entrance optics. A voice coil of an audio loud speaker including a cone portion and two electrical input connections has a physical projection one end of which is coupled to the cone portion and the other end approximate to and in front of a shield aperture. A black body radiation source is placed behind the aperture and a frequency compensated amplifier electrically coupled to the input connections such that collimated signal-modulated black body energy that is proportional to the total range of frequencies input is observed by an infrared sensitive detector aligned with the radiation emanating from the aperture.

Abstract: A thin film of MgIn.sub.2 O.sub.4, is used as an electrode in a ferroelecc device. It provides reasonable conductivity, is inherently transparent and can be grown epitaxially.

Abstract: A quantum wire embedded in another material or a quantum wire which is free standing. Specifically, the quantum wire structure is fabricated such that a quantum well semiconductor material, for example Gallium Arsenide (GaAS), is embedded in a quantum barrier semiconductor material, for example Aluminum Arsenide (AlAs). Preferably, the entire quantum wire structure is engineered to form multiple subbands and is limited to a low dimensional quantum structure. The dimensions of the quantum wire structure are preferably around 150.times.250 .ANG.. This structure has a negative absolute conductance at a predetermined voltage and temperature. As a result of the resonant behavior of the density of states, the rates of electron scattering in the passive region (acoustic phonon and ionized impurity scattering as well as absorption of optical phonons) decrease dramatically as the electron kinetic energy increases.

Abstract: A non-destructive technique for examining the oxidative status of packaged, dry or intermediate moisture foods. In a preferred embodiment, the technique involves packaging the foods in an assembly comprising a container or pouch formed from a pair of sheets heat-sealed to one another along their peripheries. The sheets may each be a trilaminate comprising a polyethylene terephthalate outer layer, an aluminum foil middle layer and a polyolefin inner layer. One of the sheets is provided with a cut-out portion which serves as a light transmissive window. A device comprising a strip of polyethylene terephthalate which is coated on one side with a polyamide coating is mounted across the light transmissive window, with the polyamide coating facing in towards the interior of the pouch. The food within the pouch is stored within about 2 cm of the polyamide coating during oxidation.

Abstract: An improved solid state electrochemical cell is provided including a lith ion conducting solid electrolyte. The lithium ion conducting solid electrolyte is a solid solution of lithium germanium oxide and lithium vanadium oxide that includes lithium iodide as an additive. The improved cell can be used as a high temperature high rate rechargeable cell or as a high temperature thermal cell.

Abstract: A ceramic armor having a tough backup plate and metal reinforcement in the ceramic to minimize damage thereto as projectiles smash into the armor and are shattered.

Abstract: A reticle gunsight is illuminated by a chemical illumination stick which is nserted through a tapped port in a lower chamber of the gunsight. The tapped port is closed with a threaded plug to retain light within the lower chamber. The lower chamber has an optical opening therein which is aligned with reticle cross hairs to produce a light beam having the image of the cross hairs. The light beam is focussed through a collimated lens and then directed by a prism onto a beam splitter in an upper chamber of the reticle gunsight. The upper chamber is open at both ends and is aligned with the barrel of the gun so that when the image of the target is superimposed with the image of the reticle in the beam splitter, the person using the gun knows that the gun is aimed at the target. Since the gunsight does not rely on electrical illumination and does not itself illuminate the target, many deficiencies associated with previous gunsight configurations are eliminated.

Abstract: An optical holder for mounting and orienting a lens or lens subassembly by se of a removable retaining lens within a mount ring. Two adjustment set screws and a pressure pin mechanism hold the retaining lens. A constant pressure is applied against the set screws which is releasable. The retaining lens ring can then be removed and replaced without loss of alignment.

Abstract: A 20 mR (5.16 * 10.sup.-3 C/Kg) full-scale carbon fiber dosimeter that provides a direct reading of low-level Gamma and neutron exposure in real-time. To attain this, the dosimeter utilizes an enlarged ionization chamber that has a cylindrical shape with an inside diameter at least 1 inch (2.54 cm), an outside diameter at least 1.1 inches (2.794 cm), an inside height at least 0.725 inch (1.8415 cm), and an outside at least 1 inch (2.54 cm). Moreover, the inner wall of the dosimeter's ionization chamber is lined with either a predetermined hydrogenous or non-hydrogenous material having different sensitivity to gamma ray and neutron exposure.