959 results about "Waveguide filter" patented technology

A disclosed a plasma process apparatus includes a process chamber that houses a substrate subjected to a predetermined plasma process and may be evacuated to a reduced pressure; a microwave generator that generates microwaves for generating plasma; a waveguide pipe that transmits the microwaves from the microwave generator to the process chamber; a waveguide pipe / coaxial pipe converter connected to one end of the waveguide pipe; and a coaxial pipe that forms a line through which the microwaves are transmitted from the waveguide pipe-coaxial pipe converter to the process chamber. An inner conductive body of the coaxial pipe has a hollow portion; and a first process gas supplying portion that supplies a process gas into the process chamber through the hollow portion of the inner conductive body of the coaxial pipe.

A multiband waveguide reflector antenna feed comprises waveguide feeds in a concentric architecture. A waveguide feed is located in the center and coaxial waveguide feeds are disposed around the center feed. The waveguide feeds may be all-metallic with the center feed operating in a TE11 mode and the coaxial feeds operating in a coaxial TE11 mode. The waveguide feeds may have electromagnetic band gap (EBG) surfaces on waveguide surfaces. The center waveguide feed may have an EBG outer conductor surface and operate in a circular waveguide TEM mode. The coaxial waveguide feeds may have EBG inner and outer conductors and operate in a circular waveguide TEM mode. The coaxial feeds may have EBG inner conductors and near perfect electrical conductor (PEC) outer conductors and operate in a circular waveguide-like TE11 mode or may comprise EBG outer conductors and PEC inner conductors and operate in a quasi-TEM waveguide mode.

A waveguide bandpass filter for use in microwave and millimeter-wave satellite communications equipment is presented. The filter is based on a substrate integrated waveguide (SIW) having several cascaded oversized SIW cavities. The filter is implemented in a printed circuit board (PCB) or a ceramic substrate using arrays of standard metalized via holes to define the perimeters of the SIW cavities. Transmission lines of a microstrip line, a stripline or coplanar waveguide are used as input and output feeds. The transmission lines have coupling slots for improved stopband performance. The filter can be easily integrated with planar circuits for microwave and millimeter wave applications.

A waveguide structure including two parallels electrically conducting ground planes (1,2), each of which includes at least one row of spaced apart electrically conducting posts (3). The rows of posts are arranged substantially parallel to one another and the space bounded by the plates and posts defines a guided wave region (4) along which electromagnetic radiation may propagate. The posts are connected to only one of the planes so that there is no physical connection between the two ground planes (1,2). Actuating means may be connected to one or both of the ground planes to cause relative movement there between to thereby alter the electrical response of the waveguide. The direction of the relative movement may such that the distance between the rows of posts (3) is changed and / or the distance between the ground planes (1,2) is changed. Various device may utilize the described waveguide construction, including reconfigurable waveguide filters and antenna structures e.g. slotted waveguide arrays.

An image sensor includes a substrate, at least an optical device, at least a dielectric layer, and at least a wave-guide tube disposed upon the optical device. The wave-guide tube has an optical barrier disposed on a sidewall thereof and a filter layer filled in the wave-guide tube. The structure of the wave-guide tube has the advantages of shortening light path, focusing, and preventing undesirable crosstalk effect between different optical devices.

The invention relates to an umbrella type unfolded reticular antenna which comprises a base; the base is fixed with a center solid reflecting surface; a plurality of waveguide type supporting rods are vertically connected with the center solid reflecting surface; a plurality of articulated mechanisms are fixed at the periphery of the edge of the base and are respectively connected with a radial rib so that the folded or unfolded radial ribs are uniformly distributed at the periphery of the center solid reflecting surface; reflecting screen meshes are fixed on the surfaces of the radial ribs and form a needed reflecting surface with the center solid reflecting surface; slotted type compressing blocks are fixed on the radial ribs, and annular compressing ropes are arranged in slots of the slotted type compressing blocks; the annular compressing ropes are tightened up to restrain the radial ribs in the foldable state to form an annular end-to-end closing structure; the annular compressing ropes are connected with a cutter which is used for cutting the annular compressing ropes; the articulated mechanisms are used for providing driving torque so as to unfold the radial ribs; the waveguide type supporting rods are internally provided with a plurality of feed waveguide channels; and a multiple-beam feed source loudspeaker array is arranged at the top of the supporting rods and is connected with the supporting rods through irregular waveguides.

A structure and method for adjusting the bandwidth of a ceramic waveguide filter comprising, in one embodiment, a monoblock of dielectric ceramic material defining respective steps and respective input / output through-holes extending through the monoblock and the respective steps. In one embodiment, the steps are defined by notches in the monoblock and the input / output through-holes define openings terminating in the notch. The bandwidth of the ceramic waveguide filter may be adjusted by adjusting the height / thickness and direction of the steps relative to an exterior surface of the monoblock and / or the diameter of the input / output through-holes.

Provided is a dielectric waveguide filter. The filter includes: a multi-layered structure of dielectric substrates having first and second ground planes at its top and bottom; first, second, and third waveguide resonators disposed at multiple layers within the multi-layered structure; converters for signal transition between input / output ports and the first and third waveguide resonators; first vias for forming the first, second, and third waveguide resonators; and second vias disposed at a boundary surface of the first waveguide resonator and the third waveguide resonator.

A dielectric waveguide filter comprising a block of dielectric material including a plurality of resonators defined by a plurality of slots defined in the block of dielectric material. The resonators are arranged on the block of dielectric material in one or more rows and columns. First and second RF signal input / output electrodes are defined on the block of dielectric material. A first direct RF signal transmission path for the transmission of an RF signal is defined by the first and second RF signal input / output electrodes and the plurality of resonators. In one embodiment, internal windows define a first direct RF signal transmission means and additional RF signal transmission means define alternate or cross-coupling paths for the transmission of the RF signal from resonators in one column to resonators in another column. In one embodiment, the filter is comprised of two separate blocks of dielectric material which have been coupled together.

A frequency comb laser providing large comb spacing is disclosed. At least one embodiment includes a mode locked waveguide laser system. The mode locked waveguide laser includes a laser cavity having a waveguide, and a dispersion control unit (DCU) in the cavity. The DCU imparts an angular dispersion, group-velocity dispersion (GVD) and a spatial chirp to a beam propagating in the cavity. The DCU is capable of producing net GVD in a range from a positive value to a negative value. In some embodiments a tunable fiber frequency comb system configured as an optical frequency synthesizer is provided. In at least one embodiment a low phase noise micro-wave source may be implemented with a fiber comb laser having a comb spacing greater than about 1 GHz. The laser system is suitable for mass-producible fiber comb sources with large comb spacing and low noise. Applications include high-resolution spectroscopy.

Various embodiments are directed toward systems and method for manufacturing low cost passive waveguide components. For example, various embodiments relate to low cost manufacturing of passive waveguide components, including without limitation, waveguide filters, waveguide diplexers, waveguide multiplexers, waveguide bends, waveguide transitions, waveguide spacers, and an antenna adapter. Some embodiments comprise manufacturing a passive waveguide component by creating a non-conductive structure using a low cost fabrication technology, such as injection molding or three-dimensional (3D) printing, and then forming a conductive layer over the non-conductive structure such that the conductive layer creates an electrical feature of the passive waveguide component.

Provided is a plasma processing apparatus which can perform uniform processing even when a substrate to be processed has a large area. The plasma processing apparatus propagates microwaves introduced into wave guide tubes to dielectric plates through slots, and performs plasma processing to the surface of the substrate by converting a gas supplied into a vacuum container into the plasma state. In the plasma processing apparatus, a plurality of waveguide tubes are arranged in parallel, a plurality of dielectric plates are arranged for each waveguide tube, and partitioning members formed of a conductor and grounded are arranged between the adjacent dielectric plates. The in-tube wavelength of the waveguide tube is adjusted to be an optimum value by vertically moving a plunger. Furthermore, unintended plasma generation is eliminated in a space between the dielectric plate and the adjacent member, and stable plasma can be efficiently generated. As a result, high-speed and uniform processings, such as etching, film-forming, cleaning, ashing, can be performed.

The embodiment of the invention provides a mixed dielectric waveguide filter. The mixed dielectric waveguide filter comprises a first three-mode resonator (1), a second three-mode resonator (3) and a single-mode resonator (2), wherein the face, making contact with the single-mode resonator (2), of the first three-mode resonator (1), and he face, making contact with the single-mode resonator (2), of the second three-mode resonator (3) are respectively provided with coupling windows (18 and 38), and dielectric of all the resonators is exposed, and used for coupling between the first three-mode resonator (1) and the single-mode resonator (2) as well as between the second three-mode resonator (3) and the single-mode resonator (2). According to the mixed dielectric waveguide filter, interference between the three-mode resonators can be reduced, and the topological structure is flexible, simple and easy to assemble.

The invention relates to a waveguide type integrated imaging three-dimensional display system based on a diffraction optical element. A micro displayer (1) is arranged at the position of the focal length of a holographic microlens array of the surface of the input end of a waveguide (3), a two-dimensional element image passes through the holographic microlens array and is imaged to obtain an image including depth and parallax information, the obtained image is coupled into the transparent waveguide (3) through a holographic lens on the surface of the input end of the waveguide (3), is spread through total reflection and is output in a coupling mode through a holographic lens on the surface of the output end of the waveguide (3), and the image is observed by the human eyes. According to the system, the diffraction optical element is introduced in to overcome the defects that in the technical background, the size is large, the weight is large, and the structure is complex, and integrated monocular three-dimensional displaying is achieved. Meanwhile, the optical element, the waveguide (3), is introduced in, and off-axis large-system pupil sight-thorough monocular three-dimensional displaying with the high transmission rate is achieved. The system can be widely applied to integrated imaging three-dimensional display systems.

The invention relates to an array multispectral optical filter and a manufacturing method thereof, belongs to the field of a micro-nano optical filter and solves the problem of integration of multichannel array detection in an existing nanofluidic chip. The optical filter only comprises the following four layers of structures: a two-dimensional metal grating layer, a buffer layer, a waveguide layer and a substrate. The invention also provides the manufacturing method of the optical filter, which utilizes a guided mode resonance principle of a two-dimensional metal grating and implements selection of different wavelengths by regulating the period of the grating. By the thickness of the buffer layer, the half-wave bandwidth of the cut-off wavelength also can be regulated. By regulating a suitable duty cycle of the two-dimensional metal grating layer, side lobes can be reduced. Therefore, relative to other turnable optical filters, the array multispectral optical filter manufactured by the method disclosed by the invention has the outstanding advantages of simple structure, low side lobes, adjustability of the half-wave bandwidth, high transmittance, no relation with polarization and the like. After the optical fiber disclosed by the invention is adopted, the integration of the nanofluidic chip can be implemented.

A dielectric waveguide filter comprising a block of dielectric material covered with an exterior layer of conductive material. A plurality of stacked resonators are defined in the block of dielectric material by one or more slots in the block of dielectric material and an interior layer of conductive material that separates the stacked resonators. First and second RF signal transmission windows in the interior layer of conductive material provide for both direct and cross-coupling RF signal transmission between the stacked resonators. In one embodiment, the waveguide filter is comprised of separate blocks of dielectric material each covered with an exterior layer of conductive material, each including one or more slots defining a plurality of resonators, and coupled together in a stacked relationship.

The invention discloses a display panel and a display device. The display panel comprises a first substrate, a liquid crystal layer, a waveguide layer, a grating layer, a first electrode and a second electrode, the liquid crystal layer, the first electrode and the second electrode are positioned between the waveguide layer and the first substrate, the first electrode and the second electrode are used for adjusting the refractive index of the liquid crystal layer, the liquid crystal layer is used for controlling light emission from the waveguide layer in a coupling manner, the coupling light emission quantity of the waveguide layer is determined according to the difference between the refractive index of the waveguide layer and the refractive index of the liquid crystal layer, and the grating layer is used for controlling light with a special wavelength among the light coupled from the waveguide layer to be emitted in a special direction. A polarizing film and a color resistor set in the display panel are omitted, so that transmittance of the display panel is improved. As the polarizing film set in the display panel is omitted, the overall phase retardation quantity of the liquid crystal layer is not required, a liquid crystal box can be thin, and the response time of liquid crystals is prolonged.

A method and system for waveguide mode filters are disclosed and may include processing optical signals of a fundamental mode and higher-order modes by filtering the higher-order modes in rib waveguides in a photonic chip. The higher-order modes may be filtered utilizing doped regions and / or patterns in one or more slab sections in the rib waveguides. The patterns may be periodic or aperiodic along the rib waveguides. The higher-order modes may be filtered utilizing varying widths of slab sections, or doped, patterned, and / or salicided ridges on the slab sections in the rib waveguides. The higher-order modes may be attenuated by scattering and / or absorbing the modes. The chip may comprise a CMOS photonic chip.

The invention discloses a dielectric waveguide filter. The dielectric waveguide filter comprises a plurality of dielectric single cavities which are connected with each other, wherein the dielectric single cavities are solid cavities made of the dielectric material; electromagnetic shielding layers are arranged on the surfaces of the solid cavities. According to the dielectric waveguide filter disclosed by the invention, cavities, namely air parts, of a conventional metal cavity waveguide filter are filled with the dielectric material according to different dielectric constants of the air and medium, and the electromagnetic shielding layer is arranged on the surface of the dielectric material to carry out electromagnetic shielding; meanwhile, the dielectric material is used for supporting, so that the designed dielectric waveguide filter has advantages of being small in size, light in weight, low in cost, having an environment-friendly effect and the like, and can satisfy development trends such as small size, light weight, low cost, high performance and environmental protection of products such as future filters, duplexers and multiplexers.

Polarization-preserving microwave RF filters having multiple resonators that are each operable for different Q factors for setting overall bandwidth. A coaxial dual-polarized waveguide filter may include a cable having a hollow circular body with ends formed by copper plates that each includes at least one iris. The irises may control the energy transfer into and out of the cavity and therefore set the Q factor for the body. The shape of the internal diameter of the body and the irises may provide for reception and propagation of differently polarized signals. Multiple segments may be cascaded in series to effect higher order filtering. Also described are methods of transmitting signals using these filters.

The invention discloses a photo sensor based on the vernier effect of a broadband light source and a cascading optical waveguide filter, which comprises a broadband light source, an input waveguide, a connecting waveguide, an output waveguide, a reference ring-shaped resonant cavity coupled with the input waveguide and the connecting waveguide, a sensing ring-shaped resonant cavity coupled with the connecting waveguide and the output waveguide and two optical power meters. The sensing ring-shaped resonant cavity and the reference ring-shaped resonant cavity are different in optical length; adjacent resonance peaks are not coincident completely when one resonance frequency of the sensing ring-shaped resonant cavity is coincident with one resonance frequency of the reference ring-shaped resonant cavity. At least a part of waveguides in the sensing ring-shaped resonant cavity are influenced by a measured variable or at least a part of waveguides are in contact with a measured substance; the movement of a resonance line can be caused by measured variable influence or measured substance change; and the vernier effect of double resonant cavities can amplify the movement to be movement of total transmission spectrum envelop and can convert the movement into the change of transmission total output power, thereby detecting the measurement substance simply.

A conducting film is formed on a dielectric block in a dielectric waveguide resonator, and a through-hole is formed in the dielectric block. The unloaded Q is set by selecting the outside dimensions of the dielectric block. The resonance frequency is set by selecting the size and location of the through-hole as well as the outside dimensions of the dielectric block. A terminal electrode is formed on the outer surface of the dielectric block. A coupling hole is formed in the dielectric block and a coupling electrode is formed on the inner surface of the coupling hole. One end of the coupling electrode is connected to the terminal electrode and the other end of the coupling electrode is either connected to the conducting film formed on the outer surface of the dielectric block or terminated inside the dielectric block. The above structure allows an increase in the degree of freedom in the design of the characteristics including the resonance frequency and unloaded Q of the dielectric waveguide resonator. The invention also provides a dielectric waveguide filter with a simple coupling mechanism whereby it is possible to couple to an external circuit without having to use an additional member and without electromagnetic leakage.

The invention discloses a broadband light source and cascaded optical waveguide filter-based optical sensor. The optical sensor comprises a wideband light source, an input waveguide, a sensing ring-shaped resonant cavity which is coupled with the input waveguide, a connection waveguide which is coupled with the sensing ring-shaped resonant cavity, a reference ring-shaped resonant cavity which is coupled with the connection waveguide, an output waveguide which is coupled with the reference resonant cavity, and two optical power meters, wherein the optical length of the sensing ring-shaped resonant cavity is the same as that of the reference ring-shaped resonant cavity; every resonance frequency of the sensing ring-shaped resonant cavity correspondingly coincides with that of the reference ring-shaped resonant cavity one by one; and at least a part of waveguide in the sensing ring-shaped resonant cavity is subjected to the detected variable influence or at least a part of waveguide cladding is contacted with the detected materials. As the movement which is caused by the detected variable influence or the change of the detected materials can be converted into the change of total transmission output power by using the cascaded filter effect of an isometric double resonant cavity, the measured quantity is simply and effectively detected.

A waveguide filter is disclosed. The waveguide filter includes a lower conductive layer; a plurality of dielectric layers stacked on the lower conductive layer; an upper conductive layer formed on a top surface of the plurality of dielectric layers; a waveguide formed on the upper conductive layer; and two sets of first via metals arranged at longitudinal sides of the waveguide filter, wherein each of the sets is formed in two-fold line shape.

The invention discloses an optical waveguide, a method for preparing the same and a wavelength converter. The cross section of the optical waveguide is in a shape like a Chinese character 'tu'; a waveguide layer of a near-stoichiometric doped lithium niobate crystal with a poled chirp period is positioned on the upper layer of the optical waveguide, and is bonded with a lower substrate by a film of which the middle contains Si components. The embodiment of the invention improves the refractivity difference between the substrate and the waveguide layer, restrains the transmission of an opticalsignal in the optical waveguide and improves the conversion efficiency through film coating, widens pump bandwidth through the grating structure with the poled chirp period, reduces the photoinduced absorption effect under the irradiation of high-strong lasers and improves the conversion efficiency by adopting the waveguide layer of the near-stoichiometric doped lithium niobate crystal.