311 results about "Ultra wideband antennas" patented technology

An impulse radio-based ultra wideband communication system, using an ultra wideband impulse and a 1-bit high-speed digital sampler, includes a transmitting RF module, a receiving RF module, a signal recovery unit, a transmitting signal processor, a receiving signal processor, and an ultra wideband antenna. The transmitting RF module includes an integrated impulse generator capable of implementing on-off-keying modulation and pulse position modulation, and an amplifier for amplifying output of the integrated impulse generator. The receiving RF module includes a two stage envelope detector for detecting a received signal and a comparator for converting the detected signal into a rectangular pulse. The signal recovery unit restores the signal from the receiving RF module to a digital signal using the 1-bit digital sampler. The signal processor includes a receiving signal processor for synchronizing the digital signal and decoding the detected signal. The ultra wideband antenna transmits and receives an ultra wideband signal.

An ultra wideband antenna is provided that filters a predetermined frequency signal. The ultra wideband antenna includes a power feeding part that receives a supply of an external electromagnetic energy; a radiator excited by the electromagnetic energy fed through the power feeding part and radiating an electromagnetic wave; and a stub, provided on the radiator in a direction parallel to a direction of an electric field formed by the electromagnetic wave, that intercepts transmission / reception of a predetermined frequency band signal. The length of the stub may be ¼ of a wavelength of the intermediate frequency of the predetermined frequency band to be removed to filter the corresponding frequency band signal. The ultra wideband antenna simplifies the construction of an ultra wideband receiving system with the power loss and noise characteristics of the system improved.

The invention relates to an ultra-wide band antenna and single-polarized and dual-polarized radiating elements thereof. The dual-polarized radiating element is formed on the basis of orthogonality of two pairs of single-polarized radiating elements, wherein each single-polarized radiating element is used for transmitting and receiving a single polarized signal and comprises a reflecting plate, a pair of element arms and a feed member, the reflecting plate constitutes a reflector of the radiating element, the pair of element arms constitute a half-wave symmetrical dipole, the feed member is fixed on the reflecting plate, and a circuit for feeding the element arms is manufactured on the feed member; and each element arm is connected with the reflecting plate by at least two supporting members so as to maintain the relative positional relationship, and non-conducting media separated capacitive coupling is formed among the supporting members. The radiating elements and the ultra-wide band antenna thereof have simple structure and low manufacturing cost and can obtain good wideband characteristics.

An ultra wide band (UWB) antenna with a unidirectional radiation pattern, including: a power feeder including a connecting point at one end and a feeding point at the other end; and a radiator including a dipole part, connected with the feeding point on the basis of the feeding point, and a loop part, whose both ends are connected with both ends of the dipole part respectively to be closed-loop-shaped. Accordingly, a UWB antenna with a unidirectional radiation pattern which mainly performs radiation perpendicular to an antenna plane can be provided.

The invention provides a phase delay linetype reflector element based reflective array antenna. The reflective array antenna comprises a pyramid horn feed source and a reflector array, wherein the reflector array is formed by periodically arranging a plurality of phase delay linetype reflector elements in a mirror symmetry manner; and the phase delay linetype reflector element structure comprises two slotting circular ring nests and two phase delay lines that are in opposite in positions. The gain bandwidth of the reflector array antenna is greatly increased, an ultra wide band antenna is realized, and cross polarization is effectively restrained as well; and in addition, the reflection array antenna provided by the invention adopts a single-layer dielectric substrate structure, so that the reflector array is simple in structure, easy to process, low in cost and light in weight.

A non-destructive detection method and system enables detecting a moisture patch located inside a building wall or the like. A transmitter generates a series of ultra-wideband pulses while an ultra-wideband antenna unit, preferably in the form of an antenna array including a plurality of switchable antenna pairs, directs the pulses toward the building structure so that the pulses are reflected therefrom, and receives the reflected pulses. A receiver processes the reflected pulses received by the antenna unit and produces a corresponding output. A controller controls the operation of the transmitter, receiver and antenna unit, and analyzes the output of the receiver for the presence of moisture inside of the building wall.

The invention provides an ultra wide band antenna with trap characteristic, which comprises a medium substrate, a radiating unit, a coplanar waveguide feed signal zone line and a coplanar waveguide ground plane, wherein the coplanar waveguide feed zone line is directly connected with the radiating unit, and the coplanar waveguide ground plane surrounds the radiating unit and the coplanar waveguide feed signal zone line. The antenna has favorable wide band characteristic and omnidirectional radiation characteristic, and the trap characteristic of the antenna can avoid interfering communications of wireless local area networks. The antenna has the advantages of simple and compact design, small size, convenient processing and low cost. The invention can be used for electronic reconnaissance and electronic countermeasure, terminal receiving equipment for tracking, electromagnetic protection and ultra wide band wireless communications, and the like.

A non-wearable Personal Emergency Response System (PERS) architecture is provided, implementing RF interferometry using synthetic aperture antenna arrays to derive ultra-wideband echo signals which are analyzed and then processed by a two-stage human state classifier and abnormal states pattern recognition. Systems and methods transmit ultra-wide band radio frequency signals at, and receive echo signals from, the environment, process the received echo signals to yield a range-bin-based slow signal that is spatio-temporally characterized over multiple spatial range bins and multiple temporal sub-frames, respectively, and derive from the slow signal multiple characteristics of human(s) in the environment. The reception antennas may be arranged in several linear baselines, implement virtual displacements, and may be set into multiple communicating sub-arrays. The decision process is carried out based on the instantaneous human state (local decision) followed by abnormal states patterns recognition (global decision).

An ultra-wideband antenna having an isotropic radiation pattern includes a support plate, a feed line on the support plate, a radiating element connected to the feed line to transmit and receive signals, and a ground plate spaced apart from the feed line and attached to the support plate. The radiating element has at least two intersecting conductive plates.

A multi-angle ultra wide band antenna for electronic devices is disclosed. The said antenna cover all mobile bands worldwide: 700 / 850 / 900 / 1700 / 1800 / 1900 and 2100 MHz and with sufficient bandwidth to include the 2400 and 2500 MHz mainly used in wireless networks, having a radiated element supported by a first substrate and expanding into a spatial geometry for transmission and reception of radio signal. An antenna base has a plurality of first solder pads on a second substrate for physical attachment to a printed circuit board and a second solder pad electrically connected to a terminal of said antenna to radio circuitry feed point, with compatible surface mount technology. The first and second substrates are joined by a bending line as a single substrate, where the said first substrate is allowed to be bent relative to the plane of the said second substrate.

The invention discloses an ultra wide band microwave photon long-distance range radar device based on chaos laser. The ultra wide band microwave photon long-distance range radar device based on chaos laser is characterized in that an ultra wide band chaos signal is used as a radar detection signal; the radar detection signal is transmitted via a long single mode fiber, is converted into a corresponding electric signal at a long-distance antenna terminal and is transmitted via an ultra wide band antenna; a detection signal is received by the ultra wide band antenna of the same model after being reflected when meeting a space target part; the laser is subjected to linear modulation, the signal is converted into a corresponding optical signal and is then transmitted via the single mode fiber to return to a center station; data processing is carried out in the data processing center to obtain and display target distance information; and therefore, the space precise positioning of the long-distance target is realized. The ultra wide band microwave photon long-distance range radar device based on the chaos laser is used for monitoring the military radar, the radar system on the mountain top and the island with severe environment and the industrial areas with severe or dangerous environment in real time.

An ultra wideband antenna is provided that filters a predetermined frequency signal. The ultra wideband antenna includes a power feeding part that receives a supply of an external electromagnetic energy; a radiator excited by the electromagnetic energy fed through the power feeding part and radiating an electromagnetic wave; and a stub, provided on the radiator in a direction parallel to a direction of an electric field formed by the electromagnetic wave, that intercepts transmission / reception of a predetermined frequency band signal. The length of the stub may be ¼ of a wavelength of the intermediate frequency of the predetermined frequency band to be removed to filter the corresponding frequency band signal. The ultra wideband antenna simplifies the construction of an ultra wideband receiving system with the power loss and noise characteristics of the system improved.

An ultra-wideband antenna array architecture includes a first array of radiating elements, a second array of radiating elements, and a third array of radiating elements, with their respective element widths proportionately ascending in size. In one configuration, the first array radiating element width is half a wavelength at the highest frequency of operation, the second array element width is twice the first width, and the third array element width is twice the second width. The first, second, and third arrays are positioned in a wavelength-scaled lattice wherein the wavelength scaling is based on design operative frequencies and whereby adjacent actively-radiating elements for an operative frequency are aligned so as to produce constructive interference when powered up. Feed means such as a diplexer with a selected-band frequency control then provides power to each array.

The invention discloses a multi-notch ultra wide band antenna which is simple in structure, small in size, and easy to control and process. The multi-notch ultra wide band antenna comprises a medium substrate, wherein the lower surface of the medium substrate is provided with a metal floor, the upper surface of the medium substrate is provided with a radiation unit and a micro-strip feeder connected with the radiation unit, the upper surface of the medium substrate is provided with an electromagnetic band gap structure formed by a plurality of branches, and the electromagnetic band gap structure is provided with a metal grounding through hole used for grounding. The electromagnetic band gap structure formed by the branches is used to form a notch, the design of a filter is replaced, and design cost and system complexity are reduced, so that the antenna is simple in structure, compact, small, convenient to process, low in cost, easy to produce, good in filtering effect and easy to control. Besides, by means of arrangement of the branches of different numbers, more notch characteristics can be achieved, and the antenna is suitable for being popularized and used in the field of antennas.

The invention belongs to the technical field of antennas and discloses an ultra wide band antenna with reconfigurable frequency. The antenna comprises a medium board, a micro band feeder, a transition micro band, a switch controller, a printed monopole which is positioned on the upper surface of the medium board, and a feeder grounding board which is positioned on the lower surface of the medium board, wherein the printed monopole comprises N radiating units which are arranged linearly; adjacent two radiating units are connected through an electronic switch; the switch controller is positioned on the lower surface of the feeder grounding board; and a control line of the switch controller is connected with (N-1) electronic switches for switching on or off the (N-1) electronic switches. The ultra wide band antenna provided by the invention overcomes the defects of the technologies of a traditional ultra wide band antenna and an antenna with reconfigurable frequency; the antenna can be switched for work in N continuous frequency sub bands and can cover an ultra wide band; simultaneously, the antenna also has the characteristics of flat gain, simple structure and the like in the ultra wide band; and the antenna can be applied for the fields of stepped-frequency ground penetrating radar systems and the like.

The invention relates to a five-notch ultra wide band antenna and belongs to the technical field of wireless communication. The five-notch ultra wide band antenna comprises a medium plate (1), a radiating unit (2) printed on the same surface of the rectangular medium plate (1), a feed unit (10), a grounding unit (11), a big C-shaped groove (3) additionally formed in the radiating unit (2) of round metal chip, a C-shaped groove (7), a small C-shaped groove (4) nested in the C-shaped groove (3), open circuit branchknots (5 and 6), and U-shaped grooves (8 and 9) additionally formed in the trapezoid grounding unit, wherein the radiating unit (2) is directly connected with the feed unit (10). A gap (12) is arranged between the feed unit (10) and the grounding unit (11) and the coplanar waveguide feed is formed. The five-notch ultra wide band antenna has the advantages of being simple in structure, compact in size, low in wastage and cost, high in precision, and good in repeatability, performance of ultra wide band and notch property, capable of effectively filtering a plurality of signals and eliminating electromagnetic interference signals of a plurality of frequency channels, and suitable for small and portable ultra wide band (UWB) equipment.

The invention relates to the design of a notch ultra-wideband antenna and belongs to the technical field of propagating and receiving electromagnetic waves. The invention provides a novel multi-notch ultra-wideband antenna with stop-band units simultaneously loaded to a feeder and a radiation patch; specifically speaking, an open slot of 1 / 4 wavelength is formed in the radiation patch and C-shaped half-wavelength open-circuit resonance units different in size are loaded at the two sides of the feeder, and therefore, a three-stop-band notch ultra-wideband antenna is realized; the three-stop-band notch ultra-wideband antenna is capable of filtering out interferences from WiMAX (Worldwide Interoperability for Microwave Access) (3.3-3.6GHz) and WLAN (Wireless Local Area Network) (5.15-5.35GHz, 5.725-5.825GHz) systems. The antenna has the advantages of independently adjustable frequency point of each stop-band and independently adjustable bandwidth of each stop-band. Simulation results and actual measurement results prove excellent multi-frequency filter characteristic of the antenna.

An ultra-wide band (UWB) antenna and a plug-and-play (PnP) device using the same are provided. A dielectric substrate of the PnP device has a ground plane. The UWB antenna includes a radiating metal plate and a feeding portion. The radiating metal plate is in a non-ground region of the dielectric substrate and has at least a slit cut. An opening of the slit cut is at the edge of the radiating metal plate facing the ground plane. The feeding portion is also at the edge of the radiating metal plate facing the ground plate for feeding a signal to the antenna.

The invention belongs to the technical field of an antenna in a communication system, and specifically relates to a trapped wave controllable ultra-wide-band antenna. The trapped wave controllable ultra-wide-band antenna comprises a microstrip feeder line, a radiation unit, a dielectric substrate and a grounding plate; the microstrip feeder line and the radiation unit are arranged on the upper layer, the dielectric substrate is arranged in the middle layer and positioned below the microstrip feeder line and the radiation unit, and the grounding plate is arranged on the lower layer and positioned below the dielectric substrate; an open circuit gap and an opening resonance ring are arranged on the radiation unit, and the open circuit gap extends from the right side edge of the radiation unitto the interior of the radiation unit; a first opening resonance ring and a second opening resonance ring are arranged on the grounding plate; the open circuit gap and the opening resonance ring areloaded with a first PIN diode and a second PIN diode respectively; and the first opening resonance ring and the second opening resonance ring are loaded with a third PIN diode and a fourth PIN diode respectively. The trapped wave controllable ultra-wide-band antenna can realize ultra wide band, single band wave trapping, dual band wave trapping and triple band wave trapping, and is simple in structure and suitable for the ultra-wide-band wireless communication system.

An ultrawideband antenna for use in communications equipment, comprising a first folded branch antenna element with an electrical connection at a first end and a second folded branch antenna element with an electrical connection at a first end. The folded branch antenna elements are of a triangular shape, or a combination of polygonal shapes. By using the present invention, the volume of an antenna is reduced and the ultra wide bandwidth can be achieved.

An ultra wide band antenna having a 270° coverage and a system thereof. The ultra wide band antenna includes a dielectric substrate, two Vivaldi horn radiators attached to the dielectric substrate and including central axes orthogonal to each other, and a single radiator coupled to the two Vivaldi horn radiators. The ultra wide band antenna system includes: a first ultra wide band antenna including a dielectric substrate, two Vivaldi horn radiators attached to the dielectric substrate and including central axes orthogonal to each other, and a single radiator coupled to the two Vivaldi horn radiators; and a second ultra wide band antenna including a dielectric substrate, two Vivaldi horn radiators attached to the dielectric substrate and including central axes orthogonal to each other, and a single radiator coupled to the two Vivaldi horn radiators, positioned on an identical plane to the first ultra wide band antenna, and forming a line symmetric structure together with the first ultra wide band antenna.

A multi-stop ban ultra wide band antenna based on a small-size double mode resonator and a zero-order resonator comprises a dielectric substrate (1), a lower surface metal plating (2) that covers upper and lower surfaces of the dielectric substrate (1), and a upper surface metal plating (3); the lower surface metal plating (2) is the earth of a feeder part, designed in isosceles trapezoid, so as to meet impedance matching requirement between a feeder (5) and an antenna radiating unit (4); the upper surface metal plating (3) comprises the following parts: an antenna radiating unit (4), a feeder (5), a first double mode stepped impedance resonator (8), a second double mode stepped impedance resonator (9), a third double mode stepped impedance resonator (10), and a zero-order splitting ring resonator (11). The antenna has simple structure, small volume, which meets the requirement of integration of a planar circuit, with low cost, which is convenient for batched manufacturing. Therefore, the invention is appropriate for various interference-free ultra wide band applications.

The invention relates to the technical field of antennas, in particular to a low profile ultra wide band antenna array setting method which overcomes the shortcoming in ultra wide band array design. A low profile ultra wide band design method is provided. An image making mode is adopted to solve the resonance problem caused by the fact that slot antenna units are adopted to form the array, then design is conducted on the array units based on the high cross coupling effect, and finally a parasitic element is adopted to adjust the working band width of the array. The method achieves antenna low profile ultra wide band characteristics and has good manufacturability and assembly capability. A metal wall image making mode is arranged between a BAVA antenna medium and a BAVA antenna floor, meanwhile the directional diagram product theorem and the electromagnetic period boundary theory are utilized to remove mutual coupling of the array units and achieve the aim of increasing band width.

The invention discloses a method for constructing a tight coupling ultra wide band antenna array based on irregular subarrays. The method comprises the following steps: S1, arranging the irregular subarrays by taking the maximum entropy as a condition according to the antenna scale; S2, enabling input ports of the power divider to be in one-to-one corresponding connection with ports of the T / R assembly through strip lines with equal lengths; S3, acquiring an active directional diagram of each sub-array; and S4, performing amplitude-phase weighting according to the active directional diagram ofeach sub-array to synthesize an overall directional diagram, and optimizing the overall directional diagram to construct and complete the tight coupling ultra-wideband antenna array based on the irregular sub-arrays. The whole feed network adopts a strip line form and is processed in a multilayer microwave circuit board, the profile height of the whole array is hardly increased, the port power distribution can be realized, and the consistency of the amplitude and the phase of each output port is ensured. The method overcomes the defect that the space between the tight coupling array units issmaller than the half wavelength, facilitates engineering application, and is high in applicability.

The invention relates to a fractal array bionic ultra-wideband antenna which comprises a substrate and a fractal array bionic radiation patch adhering to the front side of the substrate. The fractal array bionic radiation patch is an antenna array formed by arranging 25 photonic crystal batwing bionic small antennas according to a crisscrossed array structure. The invention ensures that the antenna array has a large working bandwidth while enhancing the antenna radiation intensity through the array.

A wideband antenna system is capable of radiating or receiving radio-frequency signals in a given frequency band, comprising at least two substantially collinear radiating elements, wherein each element radiates in one frequency band, a first radiating element working in the [Fhinf, Fhsup] frequency band, a second radiating element working in the [Fminf, Fmsup] frequency band. At the hinge frequencies, these two elements participate in the radiation.

Described are methods and apparatus, including a method of manufacture, for a compact antenna. Two biconical dipole antennas and a monocone monopole antenna are displaced in an adjacent and orthogonal configuration. The two biconical dipole antennas are each shunted to the monocone monopole antenna.

The invention discloses an ultra-wideband antenna with a band-notched characteristic. At present, radio communication equipment and electronic information equipment are developed towards multi-functionalization, miniaturization, ultra wide band and surrounding environment friendliness and coordination. The ultra-wideband antenna with the band-notched characteristic comprises a dielectric substrate (1) and a radiation unit (2), wherein a coplanar waveguide grounding surface (3), a radiation unit, a rectangular groove (4) and a coplanar waveguide feed signal stripline (5) are printed on the dielectric substrate; the radiation unit is connected with the coplanar waveguide feed signal stripline; the rectangular groove is reserved on the upper part of the coplanar waveguide grounding surface; the coplanar waveguide grounding surface surrounds around the radiation unit and the coplanar waveguide feed signal stripline (5); and a reserved U-shaped groove (6) is reserved on the radiation unit. The ultra-wideband antenna with the band-notched characteristic is used for receiving and transmitting radio waves; militarily, the ultra-wideband antenna with the band-notched characteristic can be used in terminals for electronic reconnaissance and electronic countermeasure as well as tracking and electromagnetic protection; and in the civil field, the ultra-wideband antenna with the band-notched characteristic can be used in terminal receiving equipment for ultra-wideband wireless communication.

This invention relates to plane super wide antenna, which comprises irradiation copper layer and feedback copper layer covered on positive and back planes of medium baseboard, which is characterized by the following: irradiation copper layer is composed of upper and down rows with upper unit composed of upper line edge and down ellipse edge and with down unit composed of left and right ellipse edges to form one ellipse edge and line edge; the feedback copper layer rectangle transmission band is relative to other side with upper edge relative to the center of irradiation units; the transmission band top end is in shape of fan with open angle symmetric.

The invention relates to a small L-T branch knot double-belt-resistance plane ultra-wide-band antenna, and belongs to the technical field of ultra-wide-band wireless communication. The ultra-wide-band antenna comprises a dielectric substrate, a feeder line, an earth plate and a metal radiating unit; the metal radiating unit comprises an analogously-symmetrical-trapezoid unit, T-shaped metal branch knots and L-shaped metal branch knots; the analogously-symmetrical-trapezoid unit is composed of ten rectangular metal sheets which are sequentially connected from top to bottom, the two ends of the long edges of the fifth rectangular metal sheet are connected with the L-shaped metal branch knots respectively, circular through holes are formed in the analogously-symmetrical-trapezoid unit, the T-shaped metal branch knots are arranged in the circular through holes, and the vertical ends of the T-shaped metal branch knots are connected with the ninth rectangular metal sheet. By means of the ultra-wide-band antenna, the relative standing-wave ratio bandwidth ranges from 1.6 Ghz to 14.8 Ghz, the obvious filtering effect is achieved between 3.3 Ghz and 3.7 Ghz and between the 5.0 Ghz and 5.9 Ghz, the mutual interference effect of different wireless communication systems is accordingly restrained, and full-band stable gains and full-band omni-directional radiation are achieved.