Abstract: 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.

Abstract: A millimeter-wave electronic scan, phased array antenna in a slotted dielectric waveguide having a semi-insulating core and at least one semi-conducting epitaxial layer. A controller affixed to the epitaxial layer is used to apply a bias voltage thereby varying the conductivity of the layer and influencing wave propagation in the guide to effect beam scanning.

Abstract: A millimeter-wave cut-off switch in a dielectric waveguide having a semi-insulating core and a semi-conducting epitaxial layer. A controller affixed to the epitaxial layer is alternately switched to vary the conductivity of the epitaxial layer thereby influencing wave propagation in the waveguide. When the waveguide is properly dimensioned such that the operating frequency lies in the high-loss section near the cut-off frequency on the loss vs. frequency characteristic curve, an applied reverse bias voltage produces a switching function in the loss characteristics associated with the wave propagating in the guide thereby resulting in low-loss propagation.

Abstract: A millimeter-wave electronic phase shifter in a dielectric waveguide having a semi-insulating dielectric core and at least one semi-conducting epitaxial layer. A controller affixed to the epitaxial layer is used to apply a bias voltage thereby varying the conductivity of the epitaxial layer and influencing wave propagation in the waveguide.

Abstract: Ferrite material to be used in millimeter wavelength apparatus is sawed ug a resin bonded diamond sawblade. A cutting speed of 5400 cm/sec is achieved by appropriate selection of sawblade diameter and spindle speed, such as 5.71 cm and 18,000 RPM. With this cutting speed and sawblade material a cut up to a maximum of 0.356 cm is possible while the ferrite is fed at from 0.0254 to 0.127 cm/sec.

Abstract: A dielectric waveguide ferrite resonance isolator capable of operating in e millimeter wave frequency range in a dielectric waveguide transmission line in which a thin rectangular hexagonal ferrite material is affixed to a side of the dielectric waveguide and then placed between the pole pieces of an electromagnet in order to magnitize and fully orient the ferrite material is improved by positioning a grooved block of dielectric having a low dielectric constant and high thermal conductivity against the face of the hexagonal ferrite so as to use the high thermal conductivity dielectric as a heat sink thereby extracting heat from the hexagonal ferrite.

Abstract: 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 therein. The bandstop filter reflects the desired bandpass frequency(s) back to the ferrite circulator where it is delivered to a third dielectric waveguide which is the output for the bandpass frequency(s).

Abstract: The air gap in the joints between millimeter wavelength, dielectric waveguide circuit components is filled with a slurry made from an inorganic dielectric, such as barium titanate; and an organic binder, such as cellulose nitrate. The proportions of the dielectric and binder are taken so as to have a composite dielectric constant the same as that of the components being joined. This removes breaks or discontinuities and in turn reduces the insertion loss at the joints.

Abstract: A variable slot conductance dielectric wavequide antenna in which the transmission line and radiating aperture is formed in one continuous, integrated and homogeneous material. The radiated antenna beam pattern is controlled by varying the conductance of radiating slots using varied geometries for each of the slots.

Abstract: A ferrite modulator/switch is disclosed for use in a dielectric waveguide ansmission line. A ferrite guide section inserted in a dielectric transmission line is longitudinally magnetized to cause a 90.degree. rotation of a wave traveling through the guide thereby inhibiting further propagation and resulting in the scattering out of wave energy away from the dielectric line.

Abstract: A dielectric waveguide of rectangular cross-section has periodically spaced, transverse slots in its upper surface. When traveling waves of varying millimeter wavelength frequencies are applied to the waveguide, the slots perturb the waves resulting in radiation having a main lobe that scans as the frequency changes. The antenna is made rigid by the use of a dielectric support.

Abstract: A dielectric waveguide ferrite resonance isolator capable of operating in the millimeter frequency range in a dielectric waveguide transmission line is provided. The isolator comprises a thin sheet of hexagonal ferrite material that has been affixed to a side of the dielectric waveguide and then placed between the pole pieces of an electromagnet in order to magnetize and fully orient the ferrite material.

Abstract: A dielectric waveguide reciprocal ferrite phase shifter is provided for use n a dielectric waveguide transmission line. The phase shifter is comprised of a length of ferrite of the same cross-sectional dimension as that of the dielectric waveguide and in fact becomes a section of the transmission line. The length of ferrite bears a thin plastic layer on its top and bottom surface and metal plates on each piece of plastic. The length of this multilayer structure then has a wire coil wrapped around in order to provide a d.c. magnetic biasing field along the length of the ferrite thereby enabling magnetization of the ferrite resulting in a reciprocal phase shift or change in electrical length within the structure.

Abstract: A Y-junction dielectric waveguide circulator is provided with a dielectric upport plate. At the vertex of adjacent dielectric waveguides are positioned metal tuning legs. These tuning legs are spaced from the waveguides and extend higher than them. Preferably the tuning legs are made integral with a cap positioned above the circulator junction. This cap also serves as a holder for the upper biasing magnet. The lower magnet is centered under the junction and bonded to the bottom of the support plate.

Abstract: A monolithic waveguide radar front end subsystem utilizing dielectric coments. The use of dielectric waveguide transmission elements permits conformal mounting while exhibiting operating characteristics comparable to those of conventional metal waveguide subsystems.

Abstract: Millimeter wave circulators are disclosed for use with millimeter wavelen dielectric waveguides. The structure comprises a prism of magnetized ferrimagnetic material with the waveguide ends bonded to the lateral faces of the prism. The waveguide ends and the lateral faces are congruent rectangles. The prisms may have triangular bases in which case a Y-junction circulator results, or square bases with waveguide ends attached to three out of four of the lateral faces thereof, whereby a T-junction circulator results.

Abstract: A line source antenna adapted for a light weight, compact phased array radar and consisting of a plurality of radiating slots periodically located in one side wall of a length of waveguide, having a single monolithic ferrite phase shifter in the form of a long continuous toroid extending the length of all of the slots.

Abstract: A line source antenna adapted for a light weight, compact phased array ra and consisting of a plurality of series fed radiating slots periodically located in the narrow side wall of a length of waveguide together with non-reciprocal latching ferrite phase shifters including dielectric loading sections and matching transformer sections on either side of phase shifters located between adjacent slot pairs.

Abstract: The method of recovering copper by cementation using copper-iron materials as part of the cementation scrap, the copper and iron in said materials being substantially physically inseparable.

Abstract: A tunable bandpass filter comprising a pair of slot line resonant cavities formed in a metallic film covering the planar surface of a ferrite substrate. A magnetic biasing field of variable magnitude is generated and applied through the ferrite substrate transversely across the slot line resonant cavities. The magnetic field operates to change the electrical length of the resonant cavities due to the fact that the magnetic permeability of the ferrite material changes with the applied field.