30 results about "Spiral resonator" patented technology

A resonator, a filter, and a duplexer are provided which are capable of very effectively suppressing the power loss caused by the edge effect, and which allow a great reduction in the overall size to be achieved. Also, a communication device including the above-mentioned filter or duplexer is provided. A ground electrode is formed over the bottom surface of a dielectric substrate, and a multiple spiral line pattern is formed on the top surface thereof. A radial line pattern is further formed on this surface with an insulation layer interposed therebetween. By thus disposing the radial pattern adjacently to the multiple spiral resonator constituted of the above-mentioned multiple spiral line, an electrostatic capacitance is added to the multiple spiral resonator. This reduces the occupation area of the resonator on the substrate, and improves the loss reduction effect.

This invention provides a laser trimming method for tuning the frequency of a spiral resonator, and for improving the characteristics of a high temperature superconductor filter comprised of high temperature superconductor spiral resonators, by tuning the individual high temperature superconductor spiral resonators. This invention also provides a method for tuning the resonance frequency of a high temperature superconductor planar coil. This invention also provides a laser ablation process for creating high temperature superconductor circuit elements.

A filter and a duplexer in which power loss due to the edge effect in resonator lines, is very effectively suppressed, which allow more reduction in overall size to be achieved, and which have desired filter characteristics, and a communication device including either or both of the filter and the duplexer. Three multiple spiral resonator stages are constructed by disposing three multiple spiral lines on the top surface of a dielectric substrate, and forming a ground electrode on the bottom surface thereof. If the first stage is set to be a right-handed spiral resonator, and the second and third stages are set to be left-handed spiral resonators, an attenuation pole is thereby created on the higher frequency side of a pass band.

The invention belongs to the field of microwave and millimeter wave technology, and provides a dual-mode reconfigurable filter based on a half-mode substrate integrated waveguide and a CSR structure, which mainly solves the problem of the large insertion loss of ordinary adjustable filters and the inability to directly adjust the bias voltage of PIN diodes. Adding to the problems of substrate integrated waveguide, the present invention adopts half-mode substrate integrated waveguide technology, and the upper metal pattern layer includes half-mode substrate integrated waveguide copper clad layer, DC bias circuit and "mountain" shaped microstrip line, etc. There are two complementary circular spiral resonant rings (CSR) on both sides of the copper clad layer. By applying forward / reverse bias, the PIN tube is turned on or off, so that the upper metal copper and the "mountain"-shaped microstrip line conduct On or off, and finally achieve single and double passband switching. The reconfigurable filter under this feature has the characteristics of small size, low insertion loss, multiple transmission zeros, high out-of-band rejection, convenient loading of DC feed, fast tuning speed, and convenient tuning. It is especially suitable for wireless communication systems.

Information is encoded in a resonator / antenna structure, which may be interrogated in order to retrieve the information via radio frequency (RF) excitation. The resonator / antenna structure comprises a multiresonator including a plurality of substructures, and exhibits a plurality of resonances in the RF domain. Characteristic frequencies of the resonances depend upon the substructures, which may be modified in accordance with information to be encoded within the resonator / antenna structure. The resonator / antenna may be formed as a conductive structure disposed upon a dielectric substrate, and may be useful for encoding information within chipless RFID tags, security documents, negotiable instruments, and so forth. A variety of suitable multiresonator structures are disclosed, including multi-stop-band filters comprising cascaded spiral resonators, a "wheel and spoke" structure, an interleaved resonant circuit, and a fractal resonator structure.

The invention provides a plane compact spiral three-mode filter, and relates to a microwave filter. The plane compact spiral three-mode filter is provided with a medium base plate, a spiral resonator with two grounded end points, grounding through holes, a T-shaped branch microstrip wire extending from the center of the resonator to the top, a T-shaped branch microstrip wire extending from the center of the resonator to the bottom, a coupling wire, a feeder wire and a grounding plate, wherein the spiral resonator with the two grounded end points, the T-shaped branch microstrip wire extending from the center of the resonator to the top, the T-shaped branch microstrip wire extending from the center of the resonator to the bottom, the coupling wire and the wire are arranged on the upper surface of the medium base plate; the lower surface of the medium base plate is tightly attached to the grounding plate; the grounding plate completely covers the lower surface of the medium base plate; the two end points of the spiral resonator with the two grounded end points are connected with the grounding plate through the grounding through holes; the grounding plate is externally connected with a coaxial outer conductor; one end of the feeder wire is connected with the end point of the coupling wire; the other end of the feeder wire is externally connected with a coaxial inner conductor. The design is simple; the structure is compact; the center frequency and the passband are adjustable; the manufacturing and the popularization are easy.

The invention discloses a high-frequency matching method for a MHz-level beam cutter. The method comprises the following steps: giving a fixed resonant frequency f0; determining tend skin depth according to the given resonant frequency f0; determining the minimum value d0 of the diameter of a wire according to the tend skin depth, wherein the d0 needs to consider two conditions that the size of ashielding housing is as small as possible and the power is in a bearable range; calculating the minimum size of the spiral resonator according to d0; calculating corresponding power P according to theminimum size of a spiral resonator; judging whether the power P is within the bearable range or not; if the power is not in the bearable range, adjusting the d0, and returning to the step 4; and if the power is in the bearable range, taking the size of the spiral resonator corresponding to the current d0 as the final size. By changing the shape of the spiral wire, changing the size of the spiralwire, changing the proportional relation between the spiral wire and the power P and changing the proportional relation between the number of turns N of a coil and the inductance L, an unexpected technical effect of reducing the size of the spiral resonator by 50% is achieved.

The spiral includes turns of rectangular section, whose pitch p and / or thickness e can vary from the inside curve towards the outside curve, or whose winding can deviate from the line of a perfect spiral. The inside curve can also be extended by a self-locking washer for fixing the spiral on the balance arbour with no play. The spiral is manufactured by photolithography and galvanic growth, or by micro-machining an amorphous or crystalline material, such as a silicon wafer.

The present invention discloses imaging antenna and array by designing the system in the Ultra-high frequency (UHF) band 300 MHz-3 GHz with resolution comparable to high-frequency microwave imagers (i.e., super-resolution). To obtain high resolution at relatively low system cost and complexity, a novel modulated antenna array element design is disclosed. The antenna is basically small loop loaded with spiral resonator. The selection of the SR as a resonator provides for adequate miniaturization rate at the lower end of the microwave frequency range. A non-modulated version of this antenna has been conceived and yielded a resolution comparable to the 24 GHz antennas while operating at 426 MHz. The disclosed antenna element operating at 426 MHz produced images with very comparable attributes to the one obtained at 24 GHz. In fact, it has been established that proposed antenna element yield a resolution of around 5 mm (much less that the wavelength divided by 100), and hence it provides super-resolution as long as the diffraction limit is concerned. The present invention further discloses an imaging probe unit comprising a imaging sensor loaded with a PIN diode, an L-matching circuit and an LC resonant detuning circuit. The present invention further discloses a one-dimensional array, comprising a plurality of imaging probe units which are placed side by side in very close proximity of each other.

The invention discloses a spiral line resonator capable of generating a local orbital angular momentum. The spiral line resonator comprises a first resonance pattern layer, a second resonance patternlayer and a dielectric substrate layer located between the first resonance pattern layer and the second resonance pattern layer. The first resonance pattern layer comprises an outer side metal circleand a first metal spiral line structure; the first metal spiral line structure comprises a plurality of uniformly distributed metal spiral lines, one end of each metal spiral line is connected with the outer side metal ring, and the other end is concyclic; the second resonance pattern layer comprises an inner side circle and a second complementary spiral line structure which are complementary on large-area metal ground; the second complementary spiral line structure comprises a plurality of complementary spiral lines which are uniformly distributed, one end of each complementary spiral line isconnected with the inner side circle, and the other end is concyclic; and projections of the first metal spiral line structure and the second complementary spiral line structure along a normal direction of the surface of the resonator do not superpose or incompletely superpose. According to the resonator, chirality asymmetry of the structure is enhanced through rotation of the upper and lower layers of spiral lines, and a local orbital angular momentum resonator is realized at a sub-wavelength scale.