Abstract:
An object of the invention is to provide a high-frequency line-waveguide converter in which a distance between a grounding conductor and a radiating conductor and a thickness of a dielectric layer of a high-frequency line can be freely set. A high-frequency line-waveguide converter for converting a high-frequency line to a waveguide comprises a high-frequency line including a first dielectric layer; a line conductor; and a grounding conductor; an opening portion of the grounding conductor; a second dielectric layer; a radiating conductor; a connecting conductor; a shielding conductor portion; and a waveguide.
Abstract:
A cutoff waveguide path is provided in a part of a dielectric waveguide comprising a pair of main conductive layers formed on an upper and a lower surfaces of a dielectric and groups of conductive vias arranged in the direction of signal transmission with a space of a distance less than ½ of a signal wavelength between the conductive vias, and provided in the cutoff waveguide path is a resonator having dielectric vias formed of a dielectric having a higher dielectric constant than that of a dielectric forming the dielectric waveguide. With this construction, a dielectric waveguide type filter easily designed and manufactured can be obtained.
Abstract:
A NRD guide includes a pair of parallel plate conductors opposed to each other at a spacing equal to or shorter than half the wavelength of a high-frequency signal to be transmitted and having opposing inner surfaces whose arithmetic average roughness Ra satisfies 0.1 &mgr;m≦Ra≦50 &mgr;m, and a dielectric strip arranged between the pair of parallel plate conductors and held in contact with the respective inner surfaces of the parallel plate conductors. The dielectric strip is strongly secured to the inner surfaces to exhibit an excellent durability. The transmission loss of the high-frequency signal can be effectively suppressed.
Abstract:
A connection structure for dielectric waveguide lines, which includes dielectric waveguide lines including dielectric substrates, a pair of main conductor layers, dielectric substrates parallel with one another being sandwiched therebetween, two rows of side-wall through conductor groups arranged at intervals less than one half of a signal wavelength in a transmission direction of high-frequency signals, so as to electrically connect the pair of main conductor layers, and a sub conductor layer disposed between each pair of main conductor layers in parallel with the main conductor layers and electrically connected with the side-wall through conductor groups. The waveguides are stacked so that the main conductor layers partly overlap each other to define an overlap part, in which a coupling window is formed. This allows design freedom and easy fabrication. In addition, dielectric waveguide lines may be stacked so that the transmission directions of high-frequency signals are orthogonal to each other and one of the main conductor layers. The main conductor layers overlap each other to define an overlap part, in which a coupling window is disposed. This provides a connection structure with little transmission loss and excellent transmission characteristics.
Abstract:
A high-frequency dielectric waveguide line comprising a dielectric substrate with two conductor layers on its two surfaces, and a plurality of rows of through conductors in the substrate connecting the two conductor layers. The distances between the through conductors in each row are not more than half of the wavelength of the signal transmitted in the transmission direction of the waveguide. The waveguide line has a branching portion where a first waveguide line having a width d branches into second and third parallel waveguide lines both of width d. The portion of the waveguide at the branching point has a width of A, where 2d≦A≦3d. The first, second and third waveguide lines are connected without abrupt width enlargement. The branching waveguide line have small transmission losses for high-frequency signals.
Abstract:
A high-frequency dielectric waveguide line comprising a dielectric substrate with two conductor layers on its two surfaces, and a plurality of rows of through conductors in the substrate connecting the two conductor layers. The distances between the through conductors in each row are no more than half of the wavelength of the signal transmitted in the transmission direction of the waveguide. The waveguide line has a branching portion where a first waveguide line having a width d branches into second and third parallel waveguide lines both of width d. The portion of the waveguide at the branching point has a width of A, where 2d.ltoreq.A.ltoreq.3d. The first, second and third waveguide lines are connected without abrupt width enlargement. The branching waveguide line have small transmission losses for high-frequency signals.
Abstract:
An automatic programming apparatus is provided to generate a NC program for processing a roll having a cylindrical part and axle parts. The apparatus includes a roll-profile setting module, a process-condition setting module, a process-order setting module and an automatic programming module. The roll-profile setting module establishes dimensional values of the roll between an operator and the apparatus at every locational code, while the process-condition setting module establishes a plurality of process conditions at every process code, interactively. The process-order setting module combines the locational codes with the process codes at every process order, optionally and interactively, so that the process order of the cylindrical part and the axle parts is set while allocating any one of the process conditions. The automatic programming module generates the NC program for executing a series of roll process, on the basis of the combination of the process code and the locational code set by the process-order setting module.
Abstract:
A high-frequency module includes a high-frequency component including a high-frequency circuit, a conductor plate including a slot, a first conductive wire, and two second conductive wires. The high-frequency component includes a signal terminal and two reference potential terminals. The signal terminal is used for at least one of input and output of a high-frequency signal. The two reference potential terminals are connected to a reference potential. The first conductive wire is connected to the signal terminal in terms of high-frequency. The first conductive wire crosses over above the slot. The two second conductive wires are connected to the two reference potential terminals in terms of high-frequency. The two second conductive wires are so disposed along the first conductive wire and do not cross over the slot. The first conductive wire and the two second conductive wires form a pair and are electromagnetically coupled to the slot.
Abstract:
There is provided an automatic tool changer which, in a precision roll turning lathe which feeds a tool post at a high speed, can automatically change a tool, such as a cutting tool, without stopping the machine, thereby enabling highly efficient ultra-Precision machining of a roll mold for molding of a large-sized plastic sheet. The automatic tool changer includes: a change device including a vertically movable pivot arm having a pivot axis and which pivots in a horizontal plane, a hand portion, mounted at the front end of the arm, for detachably gripping a tool holder, a pivot drive section for pivoting the pivot arm, and a lifting drive section for vertically moving the pivot arm; a tool holder stocker, having a plurality of circumferentially-arranged stages disposed at a predetermined distance from the pivot axis, each stage detachably holding a tool holder; a holder base, mounted to the tool post, for fixing and unfixing a tool holder through the rotation of a clamp shaft; and a clamp shaft operating device including an operating portion for clamping/unclamping the tool holder by rotating the clamp shaft.
Abstract:
Disclosed is a waveguide type rat-race circuit capable of being used suitably in a high-frequency region; further disclosed is a mixer using said circuit. This waveguide type rat-rate circuit is equipped with a circular waveguide part (30) that is provided with first-fourth ports (11-14) and that is partitioned into a first waveguide part (21) which connects the first and second ports, a second waveguide part (22) which connects the second and third ports, a third waveguide part (23) which connects the third and fourth ports, and a fourth waveguide part (24) which connects the fourth and first ports. The amount of phase shift of the first-third waveguide parts is (2n+1)π/2, and the difference between the sum of the amounts of phase shift of the first-third waveguide parts and the amount of phase shift of the fourth waveguide part is 2(m−1)π. This waveguide type rat-rate circuit is capable of being used suitably in a high-frequency region.