22 results about "Waveguide resonator" patented technology

A method for non-invasively identifying a location of a mass or tumor including: providing a patient with a possible mass or tumor; providing a detector including one or more resonant sensors, each sensor including at least one loop resonator, at least one cavity resonator, or at least one waveguide resonator; detecting resonant frequencies at different locations on the patient's skin near locations of the mass or possible tumor; and locating the mass or tumor by noting a location of an atypical resonant frequency.

Air cavity and ceramic waveguide resonator mixed filter solutions are disclosed. According to one aspect, a combined filter assembly includes an air cavity filter coupled to a ceramic waveguide (CWG) filter. The CWG filter exhibits a wall that presses against a rigid plate. Between the rigid plate and a wall of the air cavity filter is a compressible conductive gasket that is compressed between the wall of the air cavity filter and the rigid plate. The air cavity filter and the CWG filter are secured to a support base. The CWG filter is secured to the support base by flexible clamps that allow for thermal expansion of the CWG filter. The flexible clamps are secured to the support base by screws. The support base exhibits surfaces or walls that receive and anchor the screws.

The invention discloses a single-pole double-throw switch filtering assembly based on an LTCC (Low Temperature Co-Fired Ceramic) technology. A switching circuit and an LTCC resonator are integrated, and the on-off state of a switching diode in the working process is controlled by an externally applied direct current bias voltage. When the diode is in a conducting state, the parasitic inductor and the capacitor form series resonance, and the equivalent coupling admittance converter passing through the resonator can be inverted and equivalent to an open circuit, so that a branch signal is cut off, and channel isolation is realized; and when the diode is in a closed state, the electromagnetic field distribution of the substrate integrated waveguide resonator is not obviously influenced, the filter keeps normal work, and signal passband transmission is realized. According to the structure, on one hand, the SIW waveguide integration form is used for achieving the low insertion loss characteristic; and on the other hand, the stop-band suppression degree is effectively improved by introducing the cross coupling topology. The whole circuit has the advantages of being compact in structure, low in loss, high in isolation degree, excellent in out-of-band rejection performance and the like, and the requirements of 5G and future high-speed wireless communication systems can be met.

The application discloses a dielectric waveguide resonator and a multimode dielectric waveguide resonator, which comprises a dielectric resonant cavity, the dielectric resonant cavity comprises a dielectric body and a metal plating layer wrapping an outer surface of the dielectric body; a metal loading interface is arranged in the dielectric body and is connected with the metal plating layer; the metal loading interface intersects with an intrinsic electric field direction of the dielectric resonant cavity to reduce a main mode frequency of the dielectric resonant cavity. Embodiments of the application provide a dielectric waveguide resonator and a multimode dielectric waveguide resonator, by adding a metal loading interface in a dielectric body of a dielectric waveguide resonator, the size, frequency and unloaded Q value of the dielectric waveguide resonator are kept unchanged, high-order mode harmonics are pushed away, the performance of a low-pass filter is improved, and loss is improved.

According to the present invention there is provided optical assembly (1) comprising. a laser (2) which is operable to emit light: an optical wave guide (3) having an input (3a) and an output (3b). the input (3a) of the optical wave guide (3) being optically coupled to the laser (2) so that the laser (2) can input light to the wave guide (3): a resonator (5) which is optically coupled to the wave guide (3) between the input (3a) of the wave guide (3) and the output (3b) of the wave guide (3): and wherein the resonator (5) has a resonant frequency. and wherein the resonator (5) defines an optical path (11): and wherein the resonator (5) is configured so that said optical path (11) is a closed loop: and wherein the resonator (5) is configured to have a periodic change in optical characteristics along said optical path (11) so that the resonator (5) can provide a backreflection which is at the resonant frequency of the resonator: and wherein the periodic change in optical characteristics along said optical path (11) provide an amount of said backreflection, which will provide a first detuning range in which self-injection locking of the laser using said backreflection is achieved, and. a second detuning range wherein a multifrequency comb can be generated within the resonator (5): and wherein the first and second ranges at least partially overlap, so that both self-injection locking of the laser will occur and an optical resonator-based multifrequency comb is output from the wave guide (3), when the assembly (1) is in operation. There is further provided a corresponding method of providing a optical resonator-based frequency comb at an output of a waveguide, using said assembly (1).

The invention discloses a patch mutual-coupling-removing antenna based on a full-wave-band resonator. The patch mutual-coupling-removing antenna comprises two upper-layer metal patches, a middle-layer metal patch, two layers of dielectric substrates, a bottom-layer metal grounding surface and two metal probes. The two upper-layer metal patches are of rectangular structures with the same size and are arranged on the upper surface of the upper-layer dielectric substrate side by side left and right; the middle-layer metal patch is positioned between the two layers of dielectric substrates; the bottom-layer metal ground plane is located on the lower surface of the lower-layer dielectric substrate, and the two metal probes are connected with the middle-layer metal patch; wherein the middle-layer metal patch forms a strip-shaped resonator. A constant-amplitude and anti-phase electric field exists between the upper-layer metal patch and the middle-layer band-shaped resonator, and the position of a feed port is regulated and controlled to enable the feed port to fall at a weak field region, so that port decoupling can be realized. And meanwhile, the band-shaped resonator only prolongs the propagation path in the vertical direction, so that the beam width of the antenna can be expanded without adding an additional parasitic unit, and the directional diagram of the antenna is not influenced.

The invention discloses a low-fluctuation double-end-direction radiation vertical polarization antenna which comprises a hole loading type double-face patch resonator and a two-end open-circuit substrate integrated waveguide resonator. And the two hole loading type double-sided patch resonators are symmetrically arranged on the left side and the right side of the two-end open-circuit substrate integrated waveguide resonator. The two-end open-circuit substrate integrated waveguide resonator is fed from the bottom to the center by a coaxial line to form an internal homodromous vertical electric field. The hole loading type double-sided patch resonator forms four equidirectional magnetic currents at two ends and a reverse magnetic current in the middle, and the four equidirectional magnetic currents and the reverse magnetic current are superposed with equivalent magnetic currents of the open-circuit substrate integrated waveguide resonators at two ends, so that low-fluctuation vertical polarization double-end radiation is realized, and bidirectional radiation is direct radiation.

Gas detecting devices and in particular volatile substance sensors such as breath alcohol devices sensors. The semiconductor gas sensor device includes a laser structure and an optical waveguide resonator formed in a same compound semiconductor which includes at least one optical emission layer and one optical propagation layer. The optical waveguide resonator is formed in the optical propagation layer and is to its greater part separated from the remaining portion of the optical propagation layer. The laser structure is provided adjacent to a portion of the optical waveguide resonator and arranged to transmit electromagnetic radiation at a specific wavelength band to the optical waveguide resonator arranged to resonate at that specific wavelength band.

The present invention relates to a tunable waveguide resonator and a method of tuning a frequency of the tunable waveguide resonator. The waveguide resonator comprises a waveguide part having a plurality of walls where one of the plurality of walls at least partly comprises a tuning element. The tuning element has a first main surface facing toward a first main surface of an inner wall of one other wall of the plurality of walls. The tuning element is caused to, in response to a change in a temperature of the tuning element be reversibly displaced with respect to a reference plane of the first main surface of the tuning element along an extension perpendicular to the first main surface of the one other inner wall and whereby changing a dimension of a cavity of the tunable wave-guide resonator.

The invention discloses a broadband dual-polarized antenna and an antenna array for 5G millimeter wave communication, and the antenna comprises a dielectric substrate, a substrate integrated waveguide resonator, a radiation groove, a microstrip patch resonator, a plurality of arc-shaped gaps, and a feed input structure. The substrate integrated waveguide resonator comprises a plurality of first metalized through holes which are circumferentially arranged along the edge of the dielectric substrate at intervals, a first metal layer arranged on the upper surface of the dielectric substrate and a second metal layer arranged on the lower surface of the dielectric substrate, the radiation groove is formed in the first metal layer, and the center of the radiation groove coincides with the center of the first metal layer; the microstrip patch resonator is printed in the center of the first metal layer and located on the inner side of the radiation groove, the multiple arc-shaped gaps are formed in the outer side of the radiation groove, and the feed input structure comprises two second metalized through holes and two feed probes which are arranged in the microstrip patch resonator. According to the invention, the dual-polarized radiation with wide impedance bandwidth, stable high gain and high port isolation of the antenna is realized, and the manufacturing cost is reduced.

The invention discloses a non-reflection band-pass filter based on a Wilkinson power divider and a rectangular substrate integrated waveguide resonator. According to the non-reflection band-pass filter, a complementary symmetrical structure is adopted, an isolation resistor on a transmission axis is used as an absorption resistor, and the non-reflection band-pass filter is different from a traditional reflected signal eliminating method. Due to the characteristics of the two paths of reflected signals, the phase difference is 180 degrees, mutual counteraction is achieved, and the mutual counteraction effect of the reflected signals is good. In the frequency selection process, a microstrip line is not directly used, the SIW technology is adopted, the resonant cavity is used as a transmission medium, compared with microstrip line transmission, the band-pass filter has higher power capacity and quality factor, and due to the design, the band-pass filter can work on a higher frequency wave band. The filter designed by the invention keeps very low profile height and is easy to process and produce.

This invention proposes a dual-polarized full-duplex filter antenna, comprising a transmit port, a receive port, a first resonator, a second resonator, and a third resonator. The first and second resonators are square substrate integrated waveguide resonators, and the third resonator is a square metal patch. By employing an offset side-feed structure, with both ports offset by the same distance from the centerline of the first resonator, and by introducing a perturbation into the first resonator, the high port isolation required for full-duplex operation is achieved with a simple feeding structure. Chebyshev bandpass filtering response is achieved through coupling between the three resonators. The dual-polarized full-duplex filter antenna structure provided by this invention solves the problem of low port isolation in traditional side-feed structures, and has advantages such as simple feeding structure, flexible design, high port isolation, and bandpass filtering response.

A fan-shaped folded waveguide resonant cavity includes a fan-shaped metal cavity and a fan-shaped metal resonant plate. The central angle of the fan-shaped metal resonant plate is smaller than the central angle of the cross-section of the fan-shaped metal cavity. A gap is provided between the radial edges of the fan-shaped metal resonant plate and the inner wall of the fan-shaped metal cavity. A strong electric field exists between the gaps to form magnetic walls and generate folded waveguide resonant modes. The gaps are formed by a combination of straight segments and extended segments along their radial edges. The extended segments are enclosed by semi-elliptical, arc-shaped, or smooth curved boundaries. A frequency-dependent coupling filter comprises at least two fan-shaped folded waveguide resonant cavities cascaded along the signal transmission direction. The resonant cavities are cascaded along the signal transmission direction. The sequential coupling structure refers to opening non-penetrating etched grooves on adjacent resonant plates, and the cascaded coupling structure has a metal coupling block at the bottom of the gap between adjacent resonant plates. This solves the compatibility problem between the frequency-dependent coupling mechanism and the folded waveguide cavity.

The invention relates to the technical field of antennas, in particular to a dual-frequency dual-polarization base station antenna. The dual-frequency dual-polarization base station antenna comprises a first substrate, a first patch layer, a grounding layer and a feed assembly, wherein a plurality of metalized through holes are formed in the first substrate; the first patch layer is provided with a first gap, a second gap and a third gap. The grounding layer is arranged on one surface, deviating from the first patch layer, of the first substrate; and the first patch layer, the grounding layer and the first substrate with the plurality of metalized through holes jointly form the substrate integrated waveguide resonator with three slot forms on the surface. The feed assembly comprises a first feed part and a second feed part, the first feed part and the second feed part are both arranged on the grounding layer and connected with the first patch layer, and the first feed part and the second feed part are respectively used for externally connecting electromagnetic signals in different polarization directions and feeding the electromagnetic signals into the substrate integrated waveguide resonator. The dual-frequency dual-polarization base station antenna provided by the invention has the advantages of low profile and miniaturization.

The utility model relates to the field of microwave plasma technology, and concretely relates to microwave plasma torch gas conversion device based on waveguide resonant cavity, and the above structure of the utility model is mainly including waveguide cavity and quartz tube, and the quartz tube is arranged in the waveguide cavity, the section of quartz tube in the waveguide cavity is provided with expansion part, and the cross-sectional area of expansion part is greater than the cross-sectional area of non-expansion part of quartz tube. Through the above structure, in the microwave plasma reactor, the quartz tube is centrally provided with the expanded structure area, namely the expansion part, and after the gas is admitted, annular airflow is formed in the expansion area of expansion part, the time of reaction gas being ionized into plasma is significantly prolonged, namely the reaction time is significantly prolonged, which is favorable for improving the reaction conversion efficiency. Moreover, the expansion area provides good conditions for the placement of catalyst, realizes the effective coupling of plasma and catalyst, and enhances the synergistic catalysis effect.

This invention discloses a filter coupler with independently designable zeros and its design method, specifically relating to the field of microwave communication technology. It solves the technical problems of high insertion loss, large space occupation, and impedance mismatch inherent in existing filter-coupler cascade architectures. The technical solution consists of four identical dielectric waveguide resonators arranged in a 2×2 array structure. The first and second resonators form the main transmission channel, while the third and fourth resonators form the coupling channel. The resonators are connected by a rectangular coupling window. This application introduces a transmission zero on each side of the filter passband using a three-dimensional fully symmetrical "I"-shaped coupling probe structure, enabling independent design of the upper and lower transmission zeros. This improves passband selectivity and simplifies the design process, allowing for non-intrusive signal monitoring while performing signal filtering in wireless communication systems.

The present application relates to the technical fields of microwave and millimeter wave devices, and discloses a negative resistance voltage-controlled oscillator based on a frequency-adjustable quarter-mode resonant module, comprising a frequency-adjustable quarter-mode resonant module, a phase-shifting microstrip line, a negative resistance unit and an output microstrip line; the resonant unit adopts the frequency-adjustable quarter-mode resonant module, which is obtained by dividing an original complete substrate integrated waveguide resonant cavity into four equal parts along the vertical direction of two adjacent sides; a shielding via array is arranged on the open edge of the resonant cavity, and a slot is designed on the inner side of the resonant cavity to reduce electromagnetic leakage and optimize the quality factor; the negative resistance unit is connected with the resonant unit through the phase-shifting microstrip line, and signal output is realized through the output microstrip line. The present application has excellent phase noise characteristics and high frequency tuning capability while realizing the miniaturization of the oscillator, and takes into account the high frequency stability and low phase noise performance, and is suitable for high-performance wireless communication systems and related applications in the fields of microwave and millimeter wave.

The invention discloses an improved waveguide filter, and relates to the technical field of filters, the improved waveguide filter comprises a waveguide filter main body and a waveguide cavity arranged in the waveguide filter main body, and the interior of the waveguide cavity is divided into a plurality of traditional waveguide resonant cavities. At least one traditional waveguide resonant cavity forms a single-ridge waveguide resonant cavity through a single-ridge waveguide resonator and is used for introducing a transmission zero point at the high end of the amplitude-frequency characteristic of the filter and improving the steepness of the amplitude-frequency characteristic of the high end. According to the improved waveguide filter, a transmission zero point is naturally introduced to a high end through the single-ridge resonant cavity, and a complex coupling structure is not needed; the amplitude-frequency characteristic symmetry is remarkably improved, and the high-end steepness is effectively improved; the insertion loss is basically unchanged, and even is slightly reduced due to structure optimization; the design is flexible, and the zero frequency and depth can be controlled by adjusting single ridge parameters; the technology is compatible with a traditional waveguide, and mass production and popularization are facilitated.

The band-pass filter (100) of the present application is provided with a dielectric substrate (110), conductor plates (P1, P2), a ground via (VG), waveguide resonators (R1 to R7), and a trap resonator (RT). The conductor plates (P1, P2) are disposed inside the dielectric substrate and are arranged opposite to each other. The ground via (VG) connects the conductor plates (P1, P2). The waveguide resonators are coupled in series along a main coupling path from an input terminal (T1) to an output terminal (T2) in a space sandwiched by the conductor plates (P1, P2). The waveguide resonators adjacent along the main coupling path are inductive coupled to each other. The trap resonator (RT) couples two groups of waveguide resonators included in the waveguide resonators by skipping a part of the main coupling path, and capacitive couples the waveguide resonators included in each group to each other.

The invention provides a substrate integrated dielectric resonator antenna array with multiple sidelobe suppression schemes, relates to the technical field of antenna wireless communication, and solves the technical problems that in the prior art, the application sidelobe suppression capability of a high-order mode technology is insufficient and incomplete, and an amplitude weighting or spacing optimization method is limited. According to the technical scheme, the method comprises the following steps of: accurately designing a unit interval to align an array factor grating lobe with a zero point of a unit directional diagram; the distance between the two gaps is regulated and controlled to control the zero point position of a unit directional diagram, and the radiation zero point depth is deepened by using a substrate integrated structure; amplitude weighting fed to each port is realized through thickness difference and position offset of impedance conversion lines of different ports of the feed network, and the sidelobe level of the array is inhibited; the triangular grooving structure improves the flexibility of impedance matching adjustment and port amplitude weighting. Cooperative sidelobe suppression is achieved, integrated manufacturing is achieved through the substrate integrated structure, and the overall performance and reliability of the array are remarkably improved while high gain is kept.

The application relates to the technical field of microwave and millimeter wave wireless communication, and discloses a hybrid electromagnetic coupling structure, a dielectric waveguide filter and a duplexer, which comprise at least two dielectric waveguide resonator units, adjacent two dielectric waveguide resonator units are provided with an electric coupling window at the top and a magnetic coupling window at the bottom, and the electric coupling window and the magnetic coupling window are arranged in an up-down corresponding mode; the height and length of the electric coupling window are adjusted to realize the adjustment of the electric coupling strength, the height and length of the magnetic coupling window are adjusted to realize the adjustment of the magnetic coupling size; and the combination of the electric coupling window and the magnetic coupling window realizes the hybrid electromagnetic coupling between the adjacent two dielectric waveguide resonator units. More precise controllable transmission zeros can be introduced without increasing the order of the filter circuit, and the linear layout is supported, so that the frequency selectivity and design flexibility of the dielectric waveguide filter circuit are improved, and the demand of high-frequency applications such as post-5G / 6G and satellite communication is met.

This invention discloses a high near-end suppression waveguide filter, comprising a waveguide resonator, a waveguide cavity, and a coupling window. Several waveguide resonators are arranged, with adjacent waveguide resonators connected by the coupling window. The filter also includes a frequency adjustment screw and a zero-point adjustment screw. The frequency adjustment screw is correspondingly disposed in each waveguide resonator near the centerline of the high near-end suppression waveguide filter; the zero-point adjustment screw is also correspondingly disposed in each waveguide resonator but away from the centerline of the high near-end suppression waveguide filter. A coupling adjustment screw for adjusting the coupling amount is also provided on the coupling window. The high near-end suppression waveguide filter of this invention allows each independent waveguide resonator to form an independent high-suppression transmission zero, improving the near-end suppression effect. This not only achieves small size and high suppression but also further reduces loss and in-band group delay.