摘要:
In a TM dual mode dielectric resonator apparatus, a cross-shaped TM dual mode dielectric resonator is provided in an electrically conductive case, and the TM dual mode dielectric resonator includes first and second dielectric resonators integrally formed so as to be perpendicular to each other, and there is further formed at least one coupling groove for coupling an operation mode of the first dielectric resonator with that mode of the second dielectric resonator, wherein the coupling groove is formed on at least one of front and back surfaces of a crossing portion of the first and second dielectric resonators, in a diagonal direction thereof so as to cut electric lines of force of either one of an odd mode and an even mode. Alternatively, at least one coupling projection may be formed instead of the coupling groove.
摘要:
In a TM dual mode dielectric resonator apparatus including a cross-shaped TM dual mode dielectric resonator provided in an electrically conductive case, the cross-shaped dielectric resonator being comprised of first and second dielectric resonators, mode coupling means such as at least one groove or the like for coupling an operation of the first dielectric resonator with that of the second dielectric resonator is formed in the TM dual mode dielectric resonator. At least one first projection of a dielectric material for adjusting a coupling coefficient between the two dielectric resonators is formed on a portion of the crossing portion, wherein an adjustment amount of the coupling coefficient when the first projection is removed is previously determined. Further, respective at least one second and third projections of dielectric materials for adjusting resonance frequencies of the first and second dielectric resonators are formed respectively in a portion of the first dielectric resonator other than the crossing portion and in another portion of the second dielectric resonator other than the crossing portion.
摘要:
In a TM dual mode dielectric resonator apparatus, a cross-shaped TM dual mode dielectric resonator is provided in an electrically conductive case, wherein the TM dual mode dielectric resonator comprises first and second dielectric resonators integrally formed so as to be perpendicular to each other, and coupling grooves for coupling an operation mode of the first dielectric resonator with an operation mode of the second dielectric resonator are formed in the TM dual mode dielectric resonator. Sizes such as thicknesses, widths or the like, of the first and second dielectric resonators are different from each other for adjusting the resonance frequency
摘要:
A toroidal coil winding machine for winding a wire in a coil on a work such as a toroidal core of a magnetic head comprises, as the principal components, a rotary table for fixedly holding a work thereon, capable of being turned intermittently through an angle of 180.degree. at a time, a pair of mobable arms disposed on the diametrically opposite sides of the rotary table, respectively, provided with mechanical hands for gripping a wire, respectively, and capable of being moved between the respective front positions and the back positions, a clamping device for holding one free end of the wire, mounted on the rotary table, a loop holding device for holding loops of the wire wound on the work while the rotary table is stopped, mounted on the rotary table, a wire reel for feeding the wire, a wire holder disposed near the wire reel for temporarily holding the wire drawn out from the wire reel, and a cutter disposed near the wire holder for cutting the wire in a predetermined length. The movable arms are advanced to the front positions, respectively to transfer the other free end of the wire from one to the other or from the other to the one of the mechanical hands. After the other free end of the wire has been passed through an opening formed in the work and has been gripped by one or the other of the mechanical hands, the rotary table is turned through an angle of 180.degree. to wind the wire on the work.