摘要:
A low loss unidirectional conductive sheet using magnetic field biasing and electron spin precession for coupling RF power to ferrite resonators, comprising the step of placing a plurality of ferrite resonators in a bias magnetic field to excite the electron spins of the materials of said ferrite resonators into precession.
摘要:
A YIG oscillator (240) is provided having a YIG enclosure (42,46) and a YIG sphere (12) magnetically tuned by a permanent magnet (46). The YIG sphere (12) is attached to an end portion of a sphere holder (202). The sphere holder (202) has a mounting surface (208) which is configured to attach the sphere holder (202) directly to the bottom housing (44) of a YIG enclosure (42,46). The YIG sphere (12) is aligned with the sphere holder (202) such that a zero temperature compensation (ZTC) axis (122) is at a predetermined angle to the mounting surface (208). A coupling loop (16) is configured to transceive resonance signals to and from the YIG sphere (12).
摘要:
The present invention concerns a device (1) for an atomic clock, the device comprising:—a printed circuit board (20), said printed circuit board (20) comprising a conductive piece(10) for both interrogating and heating a gas in a cell of an atomic clock, the piece (10) comprising a gap (11), and being arranged for containing the cell (2), and so as to directly touch the cell (2) in at least one point,—a heating source (40, 60) for generating heat, and connected to the piece (10),—microwave conductive means (12) and arranged to be connected to the piece (10) so as to send to the piece (10) a microwave signal for interrogating the atoms of the gas in the cell (2). This device performs more than one function (e.g. heating and interrogating) and simplify the manufacturing of the atomic clock.
摘要:
An oscillator (100, 200) and a method of adjusting the frequency of oscillation of the oscillator (100, 200) are disclosed for generating a signal with an adjustable frequency in a frequency range from 1GHz to 200GHz. The oscillator (100, 200) includes a loop circuit. The loop circuit has an amplifier (101), a delay element or filter (103), a phase shifter (102), a device for adjusting the phase shifter (102), and a coupler (104) to provide an output signal. The adjusting device is coupled to the phase shifter (102).
摘要:
A variable-tuned type YIG oscillator accompanied with substantially no mechanical variations in the resonance circuit and a method of manufacturing the same are provided. An amplifier element, electrode, circuit pattern and others of the oscillator circuit portion of a YIG oscillator are integrated on the front face of a semiconductor substrate by the monolithic microwave integrated circuit manufacturing technique. A coupling loop is formed as a thick film conductor shaped so as to surround at least a portion of the outer periphery of a YIG crystal ball on the semiconductor substrate having the amplifier element, electrode, circuit pattern and others formed thereon. A hole for positioning a YIG crystal ball at a predetermined position inside of the coupling loop is formed in the semiconductor substrate from the front surface of the substrate, and the YIG crystal ball is fitted and fixed in the hole.
摘要:
An oscillator (100, 200) and a method of adjusting the frequency of oscillation of the oscillator (100, 200) are disclosed for generating a signal with an adjustable frequency in a frequency range from 1GHz to 200GHz. The oscillator (100, 200) includes a loop circuit. The loop circuit has an amplifier (101), a delay element or filter (103), a phase shifter (102), a device for adjusting the phase shifter (102), and a coupler (104) to provide an output signal. The adjusting device is coupled to the phase shifter (102).
摘要:
An oscillator (10) providing predictable oscillator modulation sensitivity includes an amplifier (11) and a feedback circuit (29) disposed about the amplifier (11). The feedback circuit (11) includes a resonator (13) having a first port and a second port, and a voltage-controlled phase shifter (27) having an input port, an output port and a control port (27a), the input port of the voltage-controlled phase shifter (27) being connected to the output port of the amplifier (11) and the output port of the voltage-controlled phase shifter (27) being coupled to a port of the resonator (13). The oscillator (10) further includes a circuit (30), responsive to signals from the output of the voltage-controlled phase shifter (27) and the first port of the resonator (13), to provide a control signal (25a) to the control port (27a) of the voltage-controlled phase shifter (27) for degenerating low frequency FM noise arising within the amplifier (10).