Abstract: A dielectric waveguide has a plurality of dielectric ceramic sheets each having a high-dielectric-constant portion and a low-dielectric-constant portion. The dielectric ceramic sheets are laminated and baked and electrode films are formed on the outer surfaces thereof. Thus, a dielectric waveguide is obtained in which the high-dielectric-constant portion serves as a propagating area and the low-dielectric-constant portion serves as a non-propagating area.

Abstract: A dielectric waveguide which has a pair of dielectric substrates affixed to each other and a pair of electrically-conductive layers on the external surfaces of the two dielectric substrates. Each dielectric substrate has a projecting part that is thicker than other parts. A propagating region is formed where the projecting parts on the two opposing dielectric substrates are put together. Furthermore, a circuit is formed on the contact surface between the dielectric substrates. The circuit may include an electronic component. A part of the circuit is arranged in the propagating region so as to provide electromagnetic-field coupling between the circuit and the dielectric waveguide.

Abstract: An antenna-shared distributor is provided such that a non-conductor section is provided in a part of two conductor planes, a dielectric resonator which resonates in the HE111 mode is disposed between the conductor planes, and first and second dielectric strips whose respective end portions face the dielectric resonator are disposed, forming first and second dielectric lines and further, a voltage-controlled oscillator and a mixer are connected to the first and second dielectric lines, respectively.

Abstract: An intersect-line apparatus has two conductor plates. An HE-mode dielectric resonator and four dielectric strips to be coupled to the resonator are disposed between the two conductor plates. The adjacent four dielectric strips are spaced from each other substantially at 90 degrees. Accordingly, signals propagating in two strip lines positioned substantially at 180 degrees and signals propagating in the remaining two strip lines cross each other within the dielectric resonator without interfering with each other.

Abstract: A dielectric waveguide has a dielectric member disposed between a pair of parallel conductor flat surfaces, such that a propagating region and a non-propagating region are formed. The spacing between the conductor flat surfaces in the non-propagating region is determined to be smaller than that in the propagating region. The above-mentioned spacings and the dielectric constant of the dielectric member are determined such that the cut-off frequency of the LSM.sub.01 mode propagating through the propagating region is lower than the cut-off frequency of the LSE.sub.01 mode and that electromagnetic waves of both the LSM.sub.01 mode and the LSE.sub.01 mode are cut-off in the non-propagating region, so that any transmission loss attributable to a mode conversion between the LSM.sub.01 mode and LSE.sub.01 mode occurring at, for example, a bend of the waveguide is eliminated so as to facilitate production of the waveguide having a desired bend angle and radius of curvature.

Abstract: A balanced-type mixer having easier mounting of a circuit board into a dielectric line apparatus, easier matching between a dielectric line and diodes, and reduced conversion loss. A first conductor pattern is disposed in a direction substantially perpendicular to first dielectric strips which constitute a first NRD guide, first and second filter circuits are provided at positions on opposite sides of the first dielectric strips, thus forming a first resonance circuit, and beam lead diodes are mounted in series within the resonance circuit. Further, a second conductor pattern is extended substantially from the midpoint between the filter circuits, and a third filter circuit is provided, thus forming a second resonance circuit. A second NRD guide based on second dielectric strips is connected to the second resonance circuit.

Abstract: A multilayer dielectric line circuit in which a dielectric line circuit has a multilayer structure so as to be easily formed with a small overall size. In one form of the invention, first and second dielectric strips and first and second dielectric resonators are provided between respective adjacent pairs of conductor plates. The first dielectric strip and the first dielectric resonator, the first and second dielectric resonators, and the second dielectric resonator and the second dielectric strip are each coupled electrically or magnetically so as to couple the respective dielectric strips in the different layers.

Abstract: The ease of mounting a circuit board on a nonradiative dielectric line is improved, the degree of freedom of conductor film patterns formed on the circuit board is increased, and the degree of integration can be easily increased to fit within a small size. Dielectric strips are provided between the two conductor plates positioned in parallel to each other, and a circuit board is positioned parallel to the conductor plates. The conductor patterns on the circuit board and the transmission waves of the nonradiative dielectric line are electromagnetically coupled to each other.

Abstract: A dielectric-line component (such as an oscillator or circulator) has a dielectric strip between a pair of electrically conductive flat-plates. The component is to be combined with another dielectric-line component which also has dielectric strips between a pair of conductive plates. When these components are assembled, a pair of conductive plates of the respective two components opposedly face each other at a first position, while the other pair of conductive plates of the respective two components opposedly face each other at a second position. The first and second positions are displaced from each other in the vertical direction and in the length direction in relation to the conductive plates. Further, the opposing faces of the dielectric strips of the two components are positioned in an area defined by the first and second positions, either between the first and second positions or at one of the first and second positions, for example.

Abstract: A transmitter-receiver whose overall size can be reduced by decreasing areas occupied by a bend portion and a coupler portion of a nonradiative dielectric (NRD) waveguide. The size is not restricted by the radius of curvature and the bending angle of the bend portion. In this transmitter-receiver, the NRD waveguide is adapted so that waves are transmitted in a single mode, namely, LSM01 mode. Further, an oscillator, an isolator, a mixer and a coupler are placed in the rear of a dielectric lens. Thus, the transmitter-receiver fits within the size of the antenna.

Abstract: A device with a nonradiative dielectric waveguide which operates in a microwave band or in a millimeter wave band. The device with a nonradiative dielectric waveguide is, for example, an oscillator, a circulator, a coupler or the like. The device has a couple of parallel conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave in a specified mode, a mounting surface which is formed on one of the conductors, and an end surface which is formed at an end of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip. An end of the dielectric strip is exposed at a corresponding end surface of the device.

Abstract: The ease of mounting a circuit board on a nonradiative dielectric line is improved, the degree of freedom of conductor film patterns formed on the circuit board is increased, and the degree of integration can be easily increased to fit within a small size. Dielectric strips are provided between the two conductor plates positioned in parallel to each other, and a circuit board is positioned parallel to the conductor plates. The conductor patterns on the circuit board and the transmission waves of the nonradiative dielectric line are electromagnetically coupled to each other.

Abstract: A high-frequency integrated circuit which operates in a microwave band or in a millimeter wave band. The high-frequency integrated circuit has a plurality of devices with respective nonradiative dielectric waveguides such as an oscillator, a coupler, etc., and a substrate on which these devices are surface-mounted. Each of the devices has a pair of parallel conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave, a mounting surface which is formed on one of the conductors and is in contact with the substrate, and an end surface which is defined by an end of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip and at which an end of the dielectric strip is exposed. The devices with a nonradiative dielectric waveguide are evaluated separately, and thereafter, the devices are surface-mounted on the substrate close to or in contact with one another.

Abstract: A high-frequency integrated circuit which operates in a microwave band or in a millimeter wave band. The high-frequency integrated circuit has devices with a nonradiative dielectric waveguide such as an oscillator, a circulator, etc., and a mount case with a nonradiative dielectric waveguide in which these devices are mounted. Each of the devices with a nonradiative dielectric waveguide has a couple of conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave in a specified mode, a mounting surface which is formed on one of the conductors, and an end surface which is formed on an end of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip and on which an end of the dielectric strip is exposed. The devices with a nonradiative dielectric waveguide are evaluated separately, and thereafter, the devices are mounted in the mount case individually.

Abstract: A measuring jig which is used to measure characteristics of a device with a nonradiative dielectric waveguide which operates in a microwave band or in a millimeter wave band. The measuring jig has a mount section on which a device with a nonradiative dielectric waveguide is to be mounted, and a converting section which connects the device to an external circuit. The converting section has a couple of parallel conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave in a specified mode, and an end surface which is formed on an end of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip and on which an end of the dielectric strip is exposed.

Abstract: A parallel connection multi-stage band-pass filter including an input terminal and an output terminal for signals, a plurality of resonators respectively having resonator frequencies different from and close to one another which are electrically connected in parallel to each other between said input and output terminals.

Abstract: A parallel connection multi-stage band-pass filter including an input terminal and an output terminal for signals, a plurality of resonators respectively having resonator frequencies different from and close to one another which are electrically connected in parallel to each other between said input and output terminals.

Abstract: This dielectric resonator comprises a cylindrical hollow case made of metal, a cylindrical hollow dielectric resonator element which is fixed and held in the case, and a dielectric tuning unit which is inserted into or withdrawn from a hollow portion of the dielectric resonator element. The hollow portion of the dielectric resonator element is formed by at least one, or a plurality of, cutout portions which extend along respective radii of the cylindrical dielectric resonator. In this dielectric resonator, the overall effective dielectric constant as a whole can be varied by inserting the tuning unit into or withdrawing it from the hollow portion of the dielectric resonator element. When the tuning unit is withdrawn from the hollow portion of the dielectric resonator element, part of an electric field path at the dielectric resonator element is interrupted by the cutout portions.

Abstract: A radio frequency signal combining/sorting device which includes a plurality of filters, and a duplexer device connected to one side of input/output sides of each of the filters for combining/sorting signals, and is characterized in that there is provided a coupling device formed at the input/output ends of the filter connected side of the duplexer means device, with the filters being formed, at their side connected to the duplexer device, with openings for receiving the coupling device.