35results about How to "With ultra-wideband characteristics" patented technology

The invention relates to a coaxial-ridge waveguide-microstrip conversion structure ultra-broadband multi-channel power splitter. The input coaxial joint and the extended coaxial waveguide adopt a tapered coaxial gradual transition, and the tapered coaxial gradual transition And the ridge waveguide-microstrip conversion structure can realize ultra-wideband impedance matching; N ridge waveguide-microstrip conversion structures are uniformly distributed along the circumference in the extended coaxial waveguide to realize N-way parallel power division, and the entire power division circuit has axisymmetric To ensure that the signal amplitudes and phases of the N-channel power division signals are equal, the N-channel signal power division can be realized in one step, which can minimize the signal transmission loss. The present invention has ultra-wideband, low transmission loss, can realize any multi-channel power division output, each power division output signal has good amplitude and phase consistency, flat group delay characteristics in the band, and is easy to integrate with other peripheral planar circuits, etc. advantage. The invention is mainly used in microwave and millimeter wave power synthesis amplification systems, array antennas, etc., and has broad application prospects in microwave and millimeter wave systems such as communication and radar.

The invention discloses a broadband substrate integrated waveguide circulator and belongs to the technical field of microwave devices. The broadband substrate integrated waveguide circulator comprises a rectangular dielectric substrate 5, a back metal floor and a front metal pattern. A metal pattern 1 in a regular triangle shape is positioned in the middle of the front metal pattern, and the metal pattern 1, the dielectric substrate 5 and the back metal floor form a three-port substrate integrated waveguide structure in 120-degree rotational symmetry. The substrate integrated waveguide structure comprises a central round window, and a central junction gyromagnetic ferrite 3 is internally arranged in the round window. Three ports of the substrate integrated waveguide structure are formed by connecting three trapezoidal micro-strip transition lines 2 in quarter central wavelength with three 50-ohm standard micro-strip lines 6 serving as a T-type port and positioned at the edge of the substrate 5. The broadband substrate integrated waveguide circulator has high isolation performance within all X-bands (8.2GHz-12.4GHz), low insertion loss and low port standing waves, and has the advantages of miniaturization, high power, integration and low cost.

The invention belongs to the technical field of the material, and specifically relates to an ultra wide band energy selection surface. The ultra wide band energy selection surface comprises a medium substrate, a first metal structure printed on an upper surface of the medium substrate, and a second metal structure printed on a lower surface of the medium substrate; the first metal structure is twogroups of same rail-mounted combination shapes; each rail-mounted combination shape comprises two mutually parallel cross metal strips and a plurality of mutually parallel longitudinal metal trips for connecting two cross metal strips; the longitudinal metal strips are arranged at intervals, and a plurality of diodes is loaded on each longitudinal metal strip; the second metal structure is a gridcomposed of the metal strips. The ultra wide band energy selection surface disclosed by the invention has the advantages that the multilayer metal periodic structure and the PIN diodes are used for realizing the frequency selection feature on incident electromagnetic wave and the energy selection feature for sending the electromagnetic energy, and the ultra wide band energy selection surface is anovel and self-adaptive front-door electromagnetic signal suppression technology.

A small ultra-wideband omnidirectional antenna comprises one radiation floor, one insulating medium, one feed body shaped in a conical shell, one radiating body shaped in the conical shell, at lease one short circuit body and one feed joint. The insulating medium is installed on the radiation floor. The feed body is installed on the insulating medium. The radiating body extends upwards at the upper end of the feed body to be formed, and a taper angle of the radiating body is larger than that of the feed body. Two ends of each short circuit body are respectively connected with the radiating body and the radiation floor. The feed joint is provided with an inner metal core connected with the feed body. The small ultra-wideband omnidirectional antenna is smaller in size and has an ultra-wideband feature.

The invention provides a multi-frequency-point broadband signal generator which mainly comprises a digital circuit module, and a local oscillation source module and a channel module which are connected with digital circuit module, wherein the local oscillation source module is also connected with the communication module. The invention has the beneficial effects that: the multi-frequency-point broadband signal generator is implemented by phase locking and frequency mixing, and can work normally in a bandwidth of 1GHz; furthermore, stray deterioration possibly occurred in a circuit is well suppressed; high stray performance and high phase noise performance are realized; and a good technical foundation is laid for synchronously outputting a plurality of frequency points.

The invention relates to a multi-frequency antenna, which comprises a ground plane, a radiation conductor, a parasitic conductor and a feed-in wire, wherein the radiation conductor comprises a feed-in part, a first radiation arm and a second radiation arm; the feed-in wire comprises a central wire and an external wire; the feed-in part is provided with a coupling edge; the parasitic conductor is connected with the ground plane and provided with a coupling edge which is arranged along a profile of the coupling edge of the feed-in part, and a gap is formed between the coupling edge of the parasitic conductor and the coupling edge of the feed-in part; the central wire is connected with the feed-in part; and the external wire is connected with the ground plane. The low-frequency resonance mode is excited through the first radiation arm and the second radiation arm and the high-frequency resonance mode is excited through the parasitic conductor, so that an antenna system integrally covers various operation frequency bands and has the characteristic of ultra wide band; and simultaneously the composition structure of the antenna is simplified.

The invention discloses an ultra-wideband quasi-open slow-wave structure comprising two identical metal plates and supporting metal walls or mediums on the two sides. The center positions on the broad edges of the lower side of the upper metal plate and the upper side of the lower metal plate are each loaded with a striped metal ridge with periodic ups and downs along the longitudinal direction, wherein the width is Rw, the height is Rh, and the cycle length of the ups and downs is p. Thus, a striped electron beam channel is formed in the space between the striped metal ridges, and the height hb is the difference between the difference b of the metal plates and two times of ridge height Rh. The slow-wave structure has a natural electron beam channel, requires no additional processing, is of low processing difficulty and large coupling impedance, and is very beneficial to oscillation starting of a backward wave oscillator. The slow-wave structure is of low low-end cut-off frequency, and has the characteristics of ultra wideband and small high-frequency transmission reflection.

The invention discloses a low-outline ultra-wideband plow-shaped antenna, which consists of a dielectric substrate and a single-layer radiation copper layer coated on the dielectric substrate, wherein the copper layer comprises a coplanar waveguide impedance transformer (1), an open circuit cavity (2) and left-right symmetrical index-like radiators (3); a left trough line (12) of the coplanar waveguide impedance transformer (1) is connected with the index-like radiators (3) transitionally, a right trough line (13) is connected with the open circuit cavity (2), a central conduction band (11) is connected with the right-side index-like radiator, each index-like radiator (3) is provided with a dual I-shaped loading groove (4) which has an upper structure and a lower structure, and a lower transverse loading groove (43) of an upper I shape is connected with an upper transverse loading groove (45) of a lower I shape through a transverse narrow grooved wire (44); and the central conduction band (11) of the coplanar waveguide impedance transformer (1) has a rectangular stepped gradually changing structure. The low-outline ultra-wideband plow-shaped antenna has a simple structure, covers 4:1 bandwidth, has good directing property, and can be used in the field of ultra-wideband wireless communication.

The invention discloses a single-sideband frequency conversion amplification high-power high-frequency microwave field intensity sensing method and device based on a stimulated Brillouin scattering effect. The invention aims to solve the problems of high cost and large system size caused by the adoption of a multi-antenna mode due to narrow frequency band coverage of a single antenna when a high-power high-frequency space microwave signal is detected by adopting an electrical microwave field intensity sensing probe in the prior art. The device comprises a laser emission module, an optical local oscillator module, an adjustable pumping module, a microwave optical amplification module, an optical electric field sensing probe, an optical receiving frequency conversion module, a microwave power detection module and a data acquisition processing and display module. Low-noise amplification of signal light to be measured is realized by using a stimulated Brillouin scattering amplification method, and down-conversion of the signal to be measured is realized by using an optical carrier microwave signal all-optical frequency mixing method, so that the electric field intensity of a high-frequency and high-power microwave signal can be measured by using a low-frequency detector and a low-speed data acquisition card.

The invention discloses a broadband planar reflective array antenna with a wider phase compensation range. The technical scheme adopted is as follows: the planar reflective array antenna includes a feed source and a conductive planar reflective array surface; the feed source is used for emitting or receiving electromagnetic waves; the conductive planar reflective array surface is used for scattering the electromagnetic waves emitted by the feed source into planar waves or receiving the planar waves and converging the planar waves onto the feed source; and a number of reflection units are distributed in an array on the conductive planar reflective array surface, and each reflection unit includes a phase hole and four branches distributed on the phase hole. The planar reflective array antenna is characterized in that twigs extend in the same direction from one side of the branches, the twigs extend near the edges of the phase holes, and slots for are formed between the twigs and the edges of the phase holes to adjust and control phase compensation and working frequency.

The invention provides a high-efficiency super-surface device for realizing large field of view imaging based on a dielectric continuous structure. The device comprises a dielectric grating structure(1), a dielectric substrate (2) and a dielectric continuous structure (3), and the monolithic imaging half field of view reaches 88 degrees. The continuous structure designed by the invention has theadvantages of high efficiency, large bandwidth and the like, also has angular insensitivity, and still has high efficiency under large-angle incidence. The scheme of the invention realizes large fieldof view imaging with characteristics of single piece, flat plate, light weight, thinness and integration.

The invention relates to a low-cost embedded wearable antenna, which comprises a radiation patch (3), a strip line (4), a ground plane (5), an upper PDMS dielectric substrate and a lower PDMS dielectric substrate. The antenna adopts a coplanar waveguide feeding mode for feeding, namely the ground plane (5), the radiation patch (3) and the strip line (4) are positioned on the same plane; and the radiation patch, the ground plane and the strip line are embedded into the upper PDMS dielectric substrate and the lower PDMS dielectric substrate to form an embedded structure. The center frequency ofthe antenna is 5.8 GHz, the reflection coefficient at the resonant frequency is-26.20 dB, the working bandwidth is 5.25-10.54 GHz, and the antenna can be used for medical service at the frequency bandof 5.725-5.875 GHz. The low-cost embedded wearable antenna has the characteristics of ultra-wideband characteristic and the like, and is higher in stability, lower in cost and more convenient to process.