92 results about "Radial waveguide" patented technology

The invention discloses a radial linear power divider/synthesizer which comprises a coaxial probe, a radial waveguide cavity and a plurality of paths of stepped waveguides, wherein the coaxial probe is inserted into the central position of the radial waveguide cavity; the radial waveguide cavity is connected with the plurality of paths of stepped waveguides; each path of stepped waveguide is composed of at least one transitional rectangular waveguide and a standard rectangular waveguide; the standard rectangular waveguide is connected with the radial waveguide cavity through the transitional rectangular waveguide; and the transitional rectangular waveguide is wider than the standard rectangular waveguide. Two such radial linear power divider/synthesizers can be assembled in a back-to-back way to form a power amplifier. The radial linear power divider/synthesizer disclosed by the invention is broadened in the work bandwidth in a manner that at least one transitional rectangular waveguide is added.

Embodiments are provided for an agile antenna that beamsteers radio frequency (RF) signals by selectively activating/de-activating tunable elements on radial-waveguides using direct current (DC) switches. The agile antenna device comprises a first radial waveguide structure encased in a first frame, a first line feed connected to the first waveguide structure, a second encased radial waveguide structure similar and coupled to the first waveguide structure. The two waveguide structures include the tunable elements controlled by the DC switches. A second line feed is connected to the second waveguide structure. The two line feeds provide the RF signal to the antenna. The antenna device also includes a plurality of radiating elements positioned between the first radial waveguide structure and the second radial waveguide structure, and distributed radially around a circumference of the first radial waveguide structure and a circumference of the second radial waveguide structure.

An optical interconnection apparatus including waveguide arrays such as waveguide lenses, waveguide gratings and star couplers, has improved efficiency realized by using a periodic array including in each period a combination of two radial waveguides. The array is formed with angular period α between an input circle and an output circle and it includes an input section, connected to the input circle, and an output section connected to the output circle. The input section includes a single waveguide in each period and it is efficiently coupled with minimal loss to the output section, whose waveguides are approximately arranged with period α/2 in the final region close to the output circle.

A radial slot antenna (1; 60) comprising a radial waveguide, which includes an upper plate (5), having a centroid (O) and an edge region (14) and provided with a plurality of radiating apertures (4), formed as slots in the upper plate (5), which develop according to an ideal annular pattern (16) around the centroid (O). The radiating apertures (4) are arranged in such a way as to form at least one first radiating region (31a) and one second radiating region (31b), which are distinct and radially separated by a dwell region (33a) without radiating apertures and wherein, in the first and second radiating regions (31a, 31b), radially adjacent radiating apertures (4) are separated from one another by a respective mutual radial distance, the dwell region (33a) having a radial width (δ) greater than the mutual radial distances of the radiating apertures (4) in the first and second radiating regions (31a, 31b). The slot antenna further comprises a signal feeder (10) operable for supplying am electromagnetic field (Ψ₀, Ψ₁) so as to assume, in the first and second radiating regions, opposite phases, in such a way that the electromagnetic field emitted by the slot antenna can be expressed via Bessel functions.

The invention provides apparatuses for a radial constrained lens in a steerable directional antenna system. The radial constrained lens includes a feed array that excites a continuous radiating aperture through a section of radial waveguide. Feed elements of the feed array are coupled to a feed network that processes a signal for each of the active feed elements. A feed array may include a plurality of feed probes or a plurality of waveguide sections. A sector, which includes a contiguous subset of feed elements, may be configured by a switching arrangement either in a transmit mode or a receive mode. The radial constrained lens may be commutated about a full 360 degree aperture view. Also, a plurality of radial constrained lens may be vertically stacked so that a scanned beam may be adjusted both in an azimuth and elevation directions.

An antenna and method for using the same are disclosed. In one embodiment, an antenna comprises a radial waveguide; an aperture operable to radiate radio frequency (RF) signals in response to an RF feed wave fed by the radial waveguide; and a radio frequency (RF) choke operable to block RF energy from exiting through a gap between outer portions of the waveguide and the aperture.

The invention belonging to the field of the millimeter wave technology discloses a millimeter-wave broadband ridged probe radial waveguide power divider/combiner. The radial waveguide power divider/combiner comprises a coaxial input waveguide, a transition structure, a radial waveguide, and an N-path ridged probe coupled output array. According to the invention, with the broadband low-reflection transition structure for the coaxial waveguide to the radial waveguide, a matched circular ring structure, and the power distribution mode of the ridge probe, the working bandwidth of the power divider/combiner is increased; the radial waveguide power divider completes power distribution by one-time operation, so that the path losses of the power distribution is reduced; and because of the circumferential symmetry of the structure and the radial waveguide working mode, the amplitude-phase consistency of all paths of signals after distribution is guaranteed, so that the high power synthesis efficiency of the power combiner is realized.

The invention provides a high-isolation radial power synthesis amplifier with broadband air micro-strips, which comprises a high-isolation radial power divider/synthesizer with broadband air micro-strips and at least one power amplifier module. The high-isolation radial power divider/synthesizer with the broadband air micro-strips comprises an input waveguide, a coaxial transition structure, a radial waveguide, the radial air micro-strips and at least one output waveguide, wherein the coaxial transition structure is arranged between the input waveguide and the radial waveguide, the center of the radial waveguide is connected with the input waveguide through the coaxial probe transition structure, the air micro-strips in radial distribution are connected to the periphery of the radial waveguide, a film resistor disc is pasted between each two adjacent air micro-strips, and each air micro-strip is connected with one output waveguide. The high-isolation radial power synthesis amplifier with the broadband air micro-strips can realize high-efficiency broadband power synthesis with one-division multiplexing and in single-mode operation.

A plasma processing apparatus is provided. The plasma processing apparatus can generate a uniform plasma in a processing container to perform a uniform processing on even a large-diameter wafer. The apparatus includes a processing container 4 shaped to be a cylinder with a bottom and accommodating amounting table 10 for mounting a wafer W thereon, a silica plate 8 for covering an upper opening of the processing container 4 in an airtight manner, a microwave supplier 50 for supplying a microwave in TE11 mode and a cylindrical waveguide 52 having one end connected to the microwave supplier 50 to extend toward the silica plate 8 and also having an interior waveguide space. The apparatus further includes a radial waveguide box 54 connected to the other end of the cylindrical waveguide 52. The radial waveguide box 54 is shaped to extend from the other end of the cylindrical waveguide 52 radially outward in the form of a flange and successively extend toward a lid body downward as a sidewall to define an interior waveguide space. The apparatus further includes a disc-shaped slot antenna 60 arranged along the silica plate 8 to cover an opening at the lower end of the radial waveguide box 54 and have a plurality of slots 101, a circularly polarized wave converter 56 disposed in the cylindrical waveguide 52 between the microwave supplier 50 and the radial waveguide box 54 to rotate the TE11-mode microwave provided from the supplier 50 about an axis of the cylindrical waveguide 52 and send the rotating microwave to the radial waveguide box 54.

The invention relates to a radial waveguide combining/distributing device which comprises a radial waveguide chamber body having a waveguide chamber, a coaxial probe which extends into the waveguide chamber body from a first surface of the same, and a radial waveguide connected with the radial waveguide chamber body, wherein the coaxial probe comprises an outer conductor and an internal conductor in the outer conductor, and the outer conductor and the outer conductor are arranged in a coaxial manner. The radial waveguide combining/distributing device is characterized in that a downward recessed structure is formed on the first surface of the radial waveguide chamber body, and the upper part of the downward recessed structure is larger than the lower part of the downward recessed structure. According to the radial waveguide combining/distributing device, the downward recessed structure of the radial waveguide chamber body is subjected to matching operation, and no extra structure change of the coaxial probe is made. Compared with coaxial probe processing, radial waveguide chamber body processing is advantaged by low processing difficulty, low requirements for processing precision and high practicality.

The invention discloses a broadband radial waveguide power divider/combiner in an abnormal-cycloid transition structure, and belongs to the field of a microwave/millimeter wave passive device. The broadband radial waveguide power divider/combiner comprises a standard rectangular waveguide, a rectangular waveguide-coaxial waveguide transition structure, a coaxial waveguide, the abnormal-cycloid transition structure, a radial waveguide provided with a multi-stage step impedance matching structure and N paths of standard output rectangular waveguides. The broadband radial waveguide power divider/combiner has the advantages of large power capacity, wide frequency band, compact structure, low insertion loss and reflection loss, good amplitude consistency and phase consistency of each output port and easy processing and assembling and the like.

The invention discloses a waveguide multi-path power synthesis/distributor applicable to a millimeter wave frequency high end. The radial waveguide power synthesis/distributor is based on a circular waveguide higher mode TM01 mode; the radial waveguide power synthesis/distributor comprises a rectangular waveguide input port, a mode converter, a circular waveguide, a matching structure and a plurality of (n is greater than or equal to 2) rectangular waveguide output ports; a TM01 mode is excited in the circular waveguide by a TE10 mode in the rectangular waveguide through the mode converter so as to realize space-time symmetry of the field distribution on the circular waveguide cross section; the mode conversion and energy distribution from the TM01 mode in the circular waveguide to the TE10 mode of the n rectangular waveguides can be realized through the multi-path power distributor; and the signals of each output port are uniform in amplitude and the same in phase. The radial waveguide power synthesis/distributor avoids the use of coaxial TEM modes; and the radial waveguide power synthesis/distributor has the advantages of larger circuit dimensions, lower processing requirement, high power capacity and low loss.

The invention discloses a radial waveguide power combiner and an assembly method thereof, wherein the microwave of the waveguide input port is conducted into the radial waveguide through a probe of the radial waveguide power combiner, and the microwave is uniformly distributed to every channel according to the radial waveguide characteristics. The probe adopts a plug-in type fixing method, that is, a first locating pin is arranged on the upper end of the probe and is inserted into a first locating hole of an upper cover plate, and a second locating pin is arranged on the lower end of the probe and is inserted into a second locating hole of a lower cover plate. The above design has advantages of guaranteeing the stability of the overall structure, positioning accurately, reducing the assembling error, and making the index more accurate than before. Compared with the present power combiner, the radial waveguide power combiner is simpler and more stable in structure, easier to realize, wider in frequency band, lower in insertion loss, and more suitable for using in microwave millimeter-wave power combing application field.

The invention discloses a digital coding holographic antenna and a regulation and control method thereof. The device comprises a control circuit and a radial waveguide, and the radial waveguide comprises a top metal plate and a bottom metal plate. A dipole radiation unit is loaded on the upper surface of the top metal plate; metamaterial absorption boundaries are loaded on the periphery of the radial waveguide, the radial waveguide, the top metal plate and the bottom metal plate form a cavity, the bottom metal plate is provided with a coaxial feed structure, the dipole radiation unit is a dipole unit array, each dipole unit is loaded with a radio frequency switch, and the radio frequency switches are connected with a control circuit.

Embodiments are provided for an agile antenna that beamsteers radio frequency (RF) signals by selectively activating/de-activating tunable elements on radial-waveguides using direct current (DC) switches. The antenna comprises two parallel radial waveguide structures, each comprising a first radial plate, a second radial plate in parallel with the first radial plate, and conductive elements positioned vertically and distributed radially between the two plates. The radial waveguide structure further includes a plurality of quarter RF chokes which are connected to the conductive elements via respective micro-strips and tunable elements. The two parallel radial plates are separated by a height determined according to a desired transmission frequency range for RF signals, a length of the micro-strips, a diameter of the conductive elements, and a clearance space around each one of the conductive elements.

The invention provides an inward zero-order Hankel leaky-wave antenna for near-field focusing. The inward zero-order Hankel leaky-wave antenna comprises a radial waveguide. A circular metal plate is arranged inside the radial waveguide and divides the radial waveguide into upper and lower dielectric layers. The antenna feeds by means of a feed coaxial connector. The inner core of the feed coaxial connector supports the metal plate. The top of the inner core does not exceed the lower surface of the metal plate. A gap is arranged between the edge of the circular metal plate and the inner wall of the radial waveguide and forms an annular slit along the circumference of the radial waveguide. The surface of the upper dielectric layer of the radial waveguide is provided with an impedance surface structure. The inward zero-order Hankel leaky-wave antenna, by utilizing annular slit coupling, obtains an inwardly-propagated zero-order Hankel wave from a zero-order Bessel standing wave, and achieves radiation by using a leaky-wave mode. The designed Hankel leaky-wave antenna is small in size, can achieve design of any radial wave number k[rho] < k0, and has adjustable frequency so as to be changed in characteristic by adjusting the frequency.

An antenna with a clamping mechanism and a method for using the same are disclosed. In one embodiment, an antenna comprises a radial waveguide, an aperture operable to radiate radio frequency (RF) signals in response to an RF feed wave fed by the radial waveguide, and one or more clamping devices to apply a compressive force between the waveguide and the aperture.

The invention discloses a Ku-frequency-range four-path radial waveguide power combiner which comprises a body, a base, a cover board and a probe. Four first waveguide ports are equidistantly arranged on the base in a circumferential direction. The top surface cover of the base is arranged on the base so that a first waveguide chamber is formed between the body and the base and the first waveguide ports can be communicated with the first waveguide chamber. The cover board covers the bottom surface of the body so that a second waveguide chamber is formed between the body and the cover board. The cover board is provided with a second waveguide port which is communicated with the second waveguide chamber. The bottom end of the probe is fixedly connected with the top surface of the base, and the bottom end successively penetrates through the first waveguide chamber and a central through hole on the body and extends into the second waveguide chamber. The probe is provided with a multi-step impedance conversion structure. The first waveguide ports and the second waveguide port are BJ140 standard waveguide ports. The Ku-frequency-range four-path radial waveguide power combiner has advantages of wide working frequency band, small insertion loss, high amplitude phase consistency, etc.

An apparatus with a rectangular waveguide to radial mode transition and method for using the same are described. In one embodiment, the apparatus comprises a radial waveguide having at least one plate; a radio-frequency (RF) launch coupled to the radial waveguide comprising a rectangular waveguide, a rectangular waveguide to coaxial transition coupled to the rectangular waveguide, and a coaxial to radial transition coupled to the rectangular waveguide to coaxial transition.