摘要:
An improved distribution constant type electrical filter which is so arranged that columnar or cylindrical dielectric units each having conductive wires axially extended through it, are inserted into through openings formed in a dielectric material block and provided on their inner peripheral faces with inner electrically conductive layers for electrostatic coupling between the conductive wires and the inner electrically conductive layers.
摘要:
A dielectric resonator is housed within an internal space of a metallic casing. An amplifier is disposed outside the space and an input and output circuits are connected to the amplifier. An output coupling window is formed in the casing at the position corresponding to the output circuit of the amplifier and an input coupling window is formed in the casing at the position corresponding to the input circuit of the amplifier. An electromagnetic wave leaking from the output circuit of the amplifier is coupled through the output coupling window to the dielectric resonator and the dielectric resonator is further coupled to the input circuit of the amplifier through the input coupling window.
摘要:
The disclosure relates to an improved coaxial resonator and an electrical filter employing such coaxial resonators. The electrical filter includes a casing of electrically conductive material, at least more than one coaxial resonators, for example, 1/4 wavelength coaxial TEM resonators each having dielectric member disposed between inner conductor and outer conductor of the coaxial resonator and a terminal electrode secured in the inner conductor to provide a terminal portion projecting from an open end face of each of the coaxial resonators, and accommodated in the casing so as to be electrically connected and mechanically secured to the casing, and coupling members for electrically coupling the resonators to each other at the terminal portions and also to input and output connectors for said electrical filter.
摘要:
A microwave band-pass filter has a casing, at least one dielectric resonator in the casing and at least one metallic adjusting screw supported by a wall of the casing and positioned adjacent the dielectric resonator with the tip end of the screw closely adjacent the resonator, so as to improve the sensitivity characteristics of the filter especially in the region higher than the resonance frequency.
摘要:
A band reflection type oscillator includes a GaAs-FET having a source, a gate and a drain in which the drain is connected to ground. A stripline is connected to the gate, and a dielectric resonator is provided adjacent the stripline in a magnetically coupled relationship therewith. A stripline stub is electrically connected to the drain and positioned adjacent the resonator in a magnetically coupled relationship therewith, thereby defining a positive feedback circuit through the drain, said stripline stub, the resonator and the stripline to the gate. By the positive feedback circuit, the oscillation stability is improved.
摘要:
A 1/4 wave length coaxial resonator comprises an outer cylindrical portion, an inner cylindrical portion positioned coaxially in the outer cylindrical portion, with the outer and inner cylindrical portions connected at one end by a radial connecting portion, and a dielectric unit disposed therebetween. The outer cylindrical portion and the inner cylindrical portion and the radial connecting portion are formed with a unitary member of a metallic extruded material formed by means of an impact extruding process so that the inner cylindrical portion is positioned coaxially in the outer cylindrical portion. As a result, a space is formed between the outer cylindrical portion and the inner cylindrical portion to allow for insertion of a hollow cylindrical dielectric unit. One end of the above described metallic extruded member of a unitary material is formed as an opened end allowing for insertion of the dielectric unit, while the other end of the metallic extruded member is formed as a radial connecting portion for electrically short-circuiting the outer cylindrical portion and the inner cylindrical portion. The dielectric unit is formed with an outer conductor layer on the outer wall surface and an inner conductor layer on the inner wall surface. The dielectric unit is inserted only in the region close to the opened end or in the whole portion of the space between the outer cylindrical portion and the inner cylindrical portion.
摘要:
The disclosure relates to an improved microwave device which includes a casing of electrically conductive material, at least two coaxial resonators, for example, 1/4 wavelength coaxial TEM resonators each having dielectric member disposed between an inner conductor and an outer conductor of the coaxial resonator and a terminal electrode secured in the inner conductor to provide a terminal portion projecting from an end face of each of the coaxial resonators. The resonators are accommodated in the casing so as to be electrically connected and mechanically secured to the casing. A dielectric plate member connecting input and output terminals of the device is provided at least two coupling electrodes spaced predetermined intervals from each other are provided on the dielectric plate member. The microwave device is arranged to obtain coupling electrostatic capacity mainly between the coupling electrodes provided on the main flat surface of the dielectric plate member.
摘要:
An electrical branching filter which includes two dielectric filters each containing, in a casing of metallic material, exciting means, exciting rod member and at least one dielectric resonator disposed between said exciting means and said exciting rod member, while the exciting rod members of the two dielectric filters are connected to each other through connecting means so as to form coupling means, with input and output connectors being respectively connected to a junction between said exciting rod members and to one end of each of said exciting means.
摘要:
An oscillator comprises two leakage lines extending in parallel with a dielectric resonator positioned therebetween, within a housing made of metal. The dielectric resonator is electromagnetically coupled to the respective leakage lines with a predetermined coupling degree through coupling gaps formed between the dielectric resonator and the respective leakage lines. The dielectric resonator is disposed at an optimum position for establishing an oscillating condition of the oscillator. Preferably, the dielectric resonator is movable in the length direction of the leakage lines.
摘要:
A filter device has two filters for filtering or separating two high-frequency signals having different frequencies. Each filter comprises a plurality of quarterwavelength coaxial resonators, cables for connecting the filters with terminals, and a casing for accommodating the two filters. Either the respective input cables or the respective output cables of the two filters are joined in a tee joint. The casing is constituted of two cooperating blocks each having grooves to precisely accommodate the two filters and the cables. The two-part casing maintains the tee joint and obviates the need for a conventional T-shaped metallic coupling member, and makes manufacture very easy.