43 results about "Stripline resonator" patented technology

A balanced filter suitable for a reduction of the filter size. The balanced filter comprises strip-line resonators (SL1a, SL1b) constituting resonance electrodes on the unbalanced side, strip-line resonators (SL2a, SL2b) disposed in adjacently opposed relation to the strip-lines on the unbalanced side and constituting resonance electrodes on the balanced side, strip-line resonators (SL3a, SL3b) disposed in adjacently opposed relation to the strip-lines on the balanced side and constituting stage constituting resonance electrodes, and impedance elements (Z) coupling the resonance electrodes on the balanced side to the stage constituting resonance electrodes.

A microwave tuned oscillator utilizing a ferromagnetic thin film resonator comprises: a) a microwave resonator (1) comprising a ferromagnetic thin film resonance plate (110) such as a disc-shaped YIG crystal placed on a microwave integrated circuit (11), such as a half-wavelength strip-line resonator, b) bias magnetic field means (12) for applying a bias magnetic field perpendicular to the ferromagnetic thin film resonance plate (110), c) an active element for oscillation (21), a reactive feedback element (24) and a load (23, 25) controlled by the microwave properties of the ferromagnetic thin film resonance plate (110) through a load feedback loop (4), and d) an overall positive feedback loop (3, 14, 15) connected between the active element for oscillation (21) and the microwave resonator (1) to cause a sustained oscillation to build up at one of parametrically excited resonances of the ferromagnetic thin film resonance plate (110).

An antenna (100) for a magnetic resonance device has a predetermined sensitivity and is designed to excite and / or detect a magnetic resonance in an object under test. The antenna (100) includes a stripline resonator (10) that is equipped with at least one stripline (11), and a conductor loop arrangement (20) that adjoins the stripline resonator (10) and forms at least one conductor loop (21, 22, 28) which is interrupted by at least one capacitor (23). The sensitivity of the antenna (100) is formed by overlapping sensitivity profiles of the stripline resonator (10) and the conductor loop arrangement (20). Also described are an antenna array (200) including a plurality of antennas (100), a magnetic resonance device (300) including at least one antenna (100) or antenna array (200), and methods for magnetic resonance imaging or magnetic resonance spectroscopy.

A filter having an unbalanced terminal, a first stripline resonator of which one end is connected to the unbalanced terminal, a second stripline resonator placed to be electromagnetically coupled to the first stripline resonator, and balanced terminals of which both ends are connected to the second stripline resonator, wherein the first stripline resonator and the second stripline resonator are connected by at least one impedance element, and the second stripline resonator is a ½ wavelength resonator substantially having ½ the length of a wavelength of a resonance frequency.

An oscillator comprising an active device having first, second and third terminals, a plurality of micro-stripline resonators coupled together to form a coupled-resonator network, the coupled-resonator network being coupled to the second terminal of the active device and a tuning network coupled to the coupled-resonator network, the tuning network being operable to adjust the coupling between at least two of the resonators that form the coupled resonator network.

A duplexer is composed of a laminate in which dielectric layers and electrode layers are laminated alternately. A first filter for transmitting and a second filter for receiving, having different pass band frequencies, are provided in the laminate. A matching circuit composed of a coupling line, having one end that is short-circuited and the other end that is connected to an external terminal, is provided between the first filter and the second filter. The first filter includes two first stripline resonators, each having one end that is short-circuited. The second filter includes two second stripline resonators, each having one end that is short-circuited. The coupling line is coupled to the first stripline resonator dose to the coupling line by electromagnetic field coupling. The coupling line is coupled to the second stripline resonator close to the coupling line by electromagnetic coupling.

A microwave tuned oscillator utilizing a ferromagnetic thin film resonator comprises: a) a microwave resonator (1) comprising a ferromagnetic thin film resonance plate (110) such as a disc-shaped YIG crystal placed on a microwave integrated circuit (11), such as a half-wavelength strip-line resonator, b) bias magnetic field means (12) for applying a bias magnetic field perpendicular to the ferromagnetic thin film resonance plate (110), c) an active element for oscillation (21), a reactive feedback element (24) and a load (23, 25) controlled by Ihe microwave properties of the ferromagnetic thin film resonance plate (110) through a load feedback loop (4), and d) an overall positive feedback loop (3, 14, 15) connected between the active element for oscillation (21) and the microwave resonator (1) to cause a sustained oscillation to build up at one of parametrically excited resonances of the ferromagnetic thin film resonance plate (110).

A method for testing dielectric properties by using a strip-line resonance method comprises the following steps of manufacturing laminated testing samples; clamping the laminated testing samples by using a testing clamp; uniformly applying pressure to the testing clamp by using a pressure device so as to remove residual air in the laminated testing samples; fixing a first coupling device and a second coupling device on a first displacement table and a second displacement table; connecting the first coupling device and the second coupling device to a vector network analyzer by using coaxial transmission lines respectively; optimally coupling the first coupling device and the testing clamp and optimally coupling the second coupling device and the testing clamp under the assistance of a vision amplification system; stimulating a strip-line resonator by using the vector network analyzer to generate resonance; transmitting resonance signals to the laminated testing samples by using the first coupling device and the second coupling device; receiving testing result data acquired from the laminated testing samples by using the vector network analyzer; transmitting the testing result data to a control processing device; and processing the testing result data by using the control processing device so as to determine the dielectric properties of the laminated testing samples.

A filter element includes a flat dielectric substrate, a ground electrode on a back main surface of the dielectric substrate, resonant lines each having a shorting end in the vicinity of a border between a side of the dielectric substrate and the ground electrode and extending from the side to a front main surface of the dielectric substrate. The resonant lines and the ground electrode constitute strip-line resonators. In any of the strip-line resonators, the line width of the resonant-line side portion is different from the line width of the resonant-line main-surface portion.

A filter element includes a flat dielectric substrate, a ground electrode on a back main surface of the dielectric substrate, resonant lines each having a shorting end in the vicinity of a border between a side of the dielectric substrate and the ground electrode and extending from the side to a front main surface of the dielectric substrate. The resonant lines and the ground electrode constitute strip-line resonators. In any of the strip-line resonators, the line width of the resonant-line side portion is different from the line width of the resonant-line main-surface portion.

A microwave filter for use at VHF frequencies provides a relatively high-Q without the need for the microstrip line or bulky mechanical resonators and varactors. The transmission line filter in accordance with the present invention utilizes a coaxial resonator, which obviates the need for microstrip line and strip line resonators, thus making the use of large ceramic substrates unnecessary. In accordance with another embodiment of the invention, switched capacitor arrays are used in place of the conventional varactors diode. As such, a microwave filter, suitable for VHF frequencies, is provided using relatively low cost off-the-shelf ceramic resonators which can be used to build a relatively low insertion loss high rejection band pass filter in the aviation band frequency range of 100 MHz to 200 MHz.

A filter and array of filters providing inductive coupling are disclosed. According to one aspect, an RF filter includes a plurality of dielectric layers with a first ground plane on one side of the dielectric layers and a second ground plane on an opposite side of the dielectric layers. One of the first and second ground planes provides an input port and one of the first and second ground planes provides an output port. Two parallel strip line resonators, lie in a first plane parallel to, and between, the first and second ground planes, the two parallel strip line resonators, having a gap there between. An inductive coupling plate in proximity to the gap, is grounded at an edge and lies in a second plane, the second plane parallel to the first plane and lying between the first plane and one of the first and second ground planes.

The invention provides a complex dielectric constant testing system and testing method based on a coaxial stripline resonator, belonging to the technical field of microwave material dielectric property testing. The test system of the present invention adopts a stripline capacitor and an open-terminal coaxial line to form a resonator with both ends open, and loads a sample on the open-circuit end of the open-terminal coaxial line of the test system to test the resonant frequency and quality factor, and then inverts to obtain The complex permittivity of the material. The test system of the present invention has the characteristics of small resonator size, stable energy coupling, hand-held test, small requirement on the shape and size of the sample to be tested, simple test operation and high test precision.

The present invention provides a stripline resonator metal clamp, comprising: an upper clamping block and a lower clamping block of the clamp; wherein, the lower clamping block includes: a positioning hole for fixing the lower clamping block on a workbench, It is used to arrange the groove of the medium substrate, the threaded hole for fixing the upper clamp block, and the positioning pin to prevent the upper clamp block and the medium substrate from sliding. Moreover, the upper clamping block includes: a positioning hole for fixing the upper clamping block, a groove for arranging the dielectric substrate, and a pin hole.