43 results about "Stripline resonator" patented technology

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.

LTCC coupled stripline resonator filters for use as bandpass filters are implemented with combline topology or with interdigital topology. The filter bandwidths range from about 0.3 GHz to about 4.5 GHz, or higher, depending of the manufacturing limitations with frequency operation of about 0.1 GHz to about 100 GHz. The filters have a plurality of through plated vias extending through the filters and connecting the top and bottom ground layers to form electric walls thereby reducing the coupling between the adjacent resonators.

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 and 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 length of a wavelength of a resonance frequency.

The disclosed stripline resonator comprises two parallel metal ground plates 4, an inner conductor 5 between two plates 4, a metal short-circuit board 6 connected to with two ends of plate 4, and two coupling loops 7 on proper position of connected part of plate 4 and conductor 5 for input/output of microwave signal. The electromagnet parameter testing device for microwave film material comprises: a microwave signal source 1, a stripline resonator 2 with broad work frequency and small volume and testing error, and a SNA 3. This device can test the parameters in different microwave frequency range.

PROBLEM TO BE SOLVED: To provide a voltage controlled oscillator providing a strip line resonator in the inside layer of a multilayer substrate and less in the dispersion of oscillation frequency by humidity. SOLUTION: Polytetrafluoroethylene is used as the core material of the multilayer substrate. Since the polytetrafluoroethylene has smaller water absorptivity than glass epoxy, the change of dielectricity to the change of humidity. As a result, also the change of the resonant frequency of the strip line resonator formed in the inside layer of the multilayer substrate is small, as a result, also the change of oscillation frequency becomes small. Then, since the change of the oscillation frequency is small, control voltage sensitivity can be reduced, and thus, C/N characteristics is improved. Then, since also the property of the polytetrafluoroethylene material itself is small in dielectric loss comparing with the glass epoxy and also specific dielectricity is small, the Q of resonant system is improved, and thereby, the C/N characteristics is improved too.

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 dielectric filter includes a first dielectric layer containing at least a pair of strip-line resonators to be electromagnetically coupled to each other. Second and third dielectric layers are disposed in an opposed relation to each other with the first dielectric layer sandwiched therebetween and having substantially the same dielectric constant (K1). Each of the second and third dielectric layers contains at least one shield electrode. The dielectric filter further includes fourth and fifth dielectric layers which have substantially the same dielectric constant (K2) and are interposed between the first and second dielectric layers and between the first and third dielectric layers, respectively. The dielectric constant (K2) of the fourth and fifth dielectric layers is selected to be less than any one of the dielectric constant (K1) of the second and third dielectric layers and the dielectric constant (K3) of the first dielectric layer.

The invention discloses a strip line resonator structure and a magnetic tuning wave trap composed of the resonator structure, and belongs to the technical field of electronic components. The strip line resonator structure is composed of a strip line central conductor, a strip line outer conductor, a gadolinium gallium garnet crystal and a YIG single crystal film, and the strip line central conductor, the YIG single crystal film and the gadolinium gallium garnet crystal are sequentially arranged in the strip line outer conductor; according to the invention, the resonator planarization of the magnetic tuning wave trap is realized, and the structural design of the strip line resonance circuit is simplified; a strip line transmission mode is adopted, so that the passband working frequency of the magnetic tuning wave trap is expanded; a plurality of strip line resonance circuits can be arranged on the same plane, so that the integration of the multi-channel wave trap is facilitated; the resonance circuit adopts a plurality of single crystal thin film blocks to form resonator cascade connection, so that a plurality of excitation modes of the single crystal thin films are effectively suppressed, the stop band depth of the wave trap is increased, and the performance of the wave trap is improved.

The invention discloses a micro substrate integrated waveguide filter with high-order mode rejection and combines SIW and strip line technologies. A strip line resonator is cascaded between two SIW resonant cavities, so coupling of a TE201 mode and a TE102 mode between the two SIW resonant cavities is hindered, the designed filter has the characteristic of suppressing the SIW high-order mode, widestop band suppression performance is achieved, moreover, by using an SIW double-layer laminated structure and the strip line resonator, micro design of the SIW filter can be realized, moreover, rectangular grooves are etched at different positions of the SIW resonant cavity, so an extra transmission zero point can be introduced, and selectivity of the filter is improved.

Electronic filters include an input, an output and a plurality of resonators series coupled between the input and the output. Each of the resonators is coupled to a tunable capacitance. In addition, a coupling means is provided between non-adjacent ones of the resonators. The resonators can include microstrip resonators, stripline resonators, resonant cavities, or other types of resonators. The tunable capacitance can be provided by tunable dielectric varactors or microelectromechanical variable capacitors. Another tunable capacitor can be included in the coupling means to provide a tunable notch response.

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.

The present invention provides a stacked chip-type band-pass filter. The stacked chip-type band-pass filter comprises a ceramic matrix and sixth-order resonators, wherein each resonator is one three-layer strip line resonator; in the sixth-order resonators: the first-order resonator, the third-order resonator and the fifth-order resonator are located at a lower plane, and the second-order strip line resonator, the fourth-order strip line resonator and the sixth-order strip line resonator are located at an upper plane; and the stacked chip-type band-pass filter further comprises a Z-type coupling line used for cross coupling of the second-order strip line resonator and the fourth-order strip line resonator. The stacked chip-type band-pass filter is provided with the sixth-order three-layerstrip line resonators, the three-layer strip lines of each resonator forms two extra flat plate loading capacitor to allow the lengths of the resonators to be far smaller than 1/4 wavelength; the sixth-order resonators are arranged on two planes at different heights to employ a vertical space so as to shorten the crosswise space while ensuring the same coupling amount, and therefore, the stacked chip-type band-pass filter is higher in integration, small in volume, little in pass-band insertion loss, high in stop band inhibition and high in reliability.

An electronic component includes a laminated body including a plurality of insulator layers laminated on each other in a lamination direction. A first strip line resonator is provided within a first region in the laminated body. A second strip line resonator is provided within a second region in the laminated body. A third strip line resonator is provided within the first region in the laminated body, and in a planar view in a lamination direction, the third strip line resonator and the first strip line resonator sandwich therebetween the second strip line resonator. A coupling conductor capacitively couples the first strip line resonator and the third strip line resonator.

The invention relates to the technical field of filters, in particular to a strip line structure for reducing power consumption. The strip line structure comprises a strip line for forming a strip line resonator circuit, wherein the thickness of the strip line is more than 100 microns. The invention also provides a low-pass filter, a communication device and a system, which employs the strip linestructure for reducing the power consumption. According to the invention, the thermal loss of signal energy in the circuit transmission process is reduced, so that the purpose of reducing loss is achieved. The invention also can achieve the miniaturization of equipment.

The invention provides a metal clamp of a strip-line resonator. The metal clamp of the strip-line resonator comprises an upper clamping block and a lower clamping block, wherein the lower clamping block comprises a positioning hole, a groove, a threaded hole and a positioning pin; the lower clamping block is fixed on a worktable via the positioning hole; a dielectric substrate is arranged in the groove; the upper clamping block is fixed via the threaded hole; the upper clamping block and the dielectric substrate are prevented from sliding by the positioning pin; the upper clamping block comprises a positioning hole, a groove and a pin hole; the upper clamping block is fixed via the positioning hole; and another dielectric substrate is arranged in the groove.

The disclosed embodiments provide an absorptive coupled-line bandpass filter. This bandpass filter includes a first port, which is coupled to a first absorptive stub, and a second port, which is coupled to a second absorptive stub. The bandpass filter also includes a coupled-line bandpass section coupled between the first and second ports, wherein the coupled-line bandpass section comprises a set of one or more parallel strip line resonators, which are coupled together in series and are coupled to the first and second ports through overlapping coupled-line sections, wherein at a center frequency of a passband for the absorptive coupled-line bandpass filter, the first and second absorptive stubs appear as open circuits, and outside of the passband, the first and second absorptive stubs appear as matched loads to ground and contribute to absorption of out-of-band signals.