355 results about "High-gain antenna" patented technology

The invention relates to millimeter-wave point-to-point communication systems. A system comprises two separated millimeter-wave transceivers which provide high throughput data transmission and reception in frequency duplex mode and use high gain antennas capable of electronic scanning in some continuous angle range provided by the control module that implement control algorithms for antenna radiation pattern. Also a method based on the exploitation of scanning antennas of initial beam directions fine adjustment and subsequent beam directions tracking and readjustment when needed is proposed.The proposed system and method provide automatic recovery of failed connection in case of relay station orientation change due to influence of various external factors (wind, vibration, different intensity of heating of the bracing mountings at different time of a day and others) and can be used in backhaul systems of base station sites for mobile networks.

A receiver receives an RF-band modulated signal transmitted from a transmitter, as well as an un-modulated carrier also transmitted from the transmitter and having a phase noise characteristic coherent with that of the modulated signal, and a product of the two components is generated to thereby restore an IF-band transmission source signal. In the receiver, a small planar antenna having a broad beam characteristic such as a single-element patch antenna is combined with an amplifier and a mixer circuit, which are formed on a micro planar circuit by an MMIC technique, so as to form a unit receiving circuit. A plurality of such unit receiving circuits are disposed on the receiver at intervals smaller than a wavelength corresponding to an IF band, and detection outputs from the unit receiving circuits are power-mixed. Thus, the receiver serves as a high-gain antenna having a detection function, and can realize a broad beam radiation characteristic comparable to that of a single-element antenna. The composed IF-band composite output is demodulated in an IF-band demodulation circuit. The present invention enables construction of a low-cost radio communication system, transmission of high-quality signals, and production of a wide beam antenna which has a high gain and which is convenient for use.

An antenna having a central active element and a plurality of passive dipoles surrounding the active element is disclosed. The passive dipoles increase the antenna gain by increasing the radiated energy in the azimuth direction. In another embodiment a plurality of parasitic directing elements extend radially outward from the passive dipoles.

An electronically tunable quad-band antenna which includes a tunable high band antenna tuned by at least one tunable varactor associated therewith; the tunable high band antenna further includes a substrate, a patch element on said substrate, at least one voltage tunable varactor associated with the patch element, a DC bias point on the patch element, an RF input on the patch element, and a temperature sensor associated with the high band pass antenna. Also included in a preferred embodiment of the electronically tunable quad-band antenna of the present invention is a tunable low band antenna tuned by at least one tunable varactor associated therewith, the tunable low band antenna further including a substrate, a patch element on said substrate, at least one voltage tunable varactor associated with said patch element, a DC bias point on said patch element, an RF input on said patch element, and a temperature sensor associated with said low band pass antenna.Also included is a controller receiving control data, and receiving output information from said low band antenna and output information from said high band antenna and controlling a first bias voltage for biasing the at least one voltage tunable varactor associated with the high band antenna and a second bias voltage for biasing the at least one voltage tunable varactor associated with the low band antenna. The bias voltages can be provided by a DC to DC converter regulator.

A radio unit casing (401) for a portable radio unit with an integrated antenna array capable of operating in a satellite communication mode. The antenna array comprises a number of adjacent co-operating antenna array surfaces arranged to be conformaly integrated in the radio unit casing (401). The antenna array surfaces faces in a multitude of directions which gives the antenna array a wide scan volume. The surfaces of the antenna array comprise a number of interleaved transmit and receive antenna elements, e.g. circular formed patches, in multiplayer structure.

Methods and systems for a 60 GHz leaky wave high gain antenna are disclosed and may include communicating RF signals using one or more or more leaky wave antennas (LWAs) in a wireless device. The LWAs may be integrated in metal traces on a chip, a package, and / or a printed circuit board (PCB). The metal traces may supply voltage signals to one or more circuits on the chip, package, and / or PCB. The voltage signals may include DC bias voltages, and / or signals at a frequency that is lower than a resonant frequency of the LWAs. The LWAs may include microstrip or coplanar lines where a cavity height of the LWAs is dependent on a spacing between the lines. An angle of the wireless signals with a surface of the chip, package, and / or PCB may be dynamically configured. The LWAs may be configured via switches in the chip, package, and / or PCB.

A mobile telemedicine unit having a high gain antenna, and mobile modem with a web or client based feature to run over variable bandwidths to connect, stay connected, or auto-reconnect a telemedicine session through a hosted or cloud-based solution. The unit is lightweight, is self-contained with a power source and a wireless signal, and is able to be carried directly to a patient's location or permanently wired in an ambulance. The modem also includes multiple cellular carriers' subscriber identity module cards to improve signal strength. The unit has at least one camera and / or medical diagnostic device that is operated by a medical professional in the patient's presence. This is streamed live over a cellular or satellite signal to a healthcare provider who is able to see, interview and potentially diagnose the patient in real time, remotely.

A leaky waveguide antenna array that receives and / or transmits electromagnetic signals includes a plurality of radiation waveguides disposed in parallel to each other on a surface plane to form the antenna array. A feed waveguide is located below the surface plane and provides an electromagnetic signal to the plurality of radiation waveguides and / or receives a plurality of electromagnetic signals from the plurality of radiation waveguides and provides a composite electromagnetic signal at an output of the feed waveguide. Each of the plurality of radiation waveguides has a waveguide axis and includes a plurality of apertures arranged in a direction of the waveguide axis. The feed waveguide includes a first section of waveguide having a first end connected to an input / output port. The first section of waveguide has a height substantially the same as the height of each of the plurality of radiation waveguides and the first section of waveguide has a second end coupled to a first junction point. The first junction point transitions from the first section of waveguide to a second section of waveguide and a third section of waveguide that each have a height that is substantially half of the height of the first section of waveguide. The second section of waveguide transitions with an upward sloping ramp to the substantially half height of the first section of waveguide. The third section of waveguide transitions with a downward sloping ramp to the substantially half height of the first section of waveguide.

An antenna architecture containing a broadband resonant cap positioned over a radiating patch is disclosed. The resonant cap consists of a rectangular resonant patch at the center with parasitic patches in close proximity of the four edges of the resonant patch. The parasitic patches may be coplanar with the resonant patch or may be mounted at an angle with respect to the vertical axis of the resonant patch. The resonant cap reduces the HPBW of the emitted radiation and improves emission directivity.

The invention discloses a battlefield rescue searching system based on beidou navigation and positioning and relates to the technical field of satellite navigation and positioning. The battlefield rescue searching system based on beidou navigation and positioning comprises an unmanned aerial vehicle search seeker, a long-distance wireless data transmission high-gain antenna, a wearable individual monitoring wristwatch and a wireless communication terminal, wherein the unmanned aerial vehicle search seeker is fixedly arranged at the belly of an unmanned aerial vehicle and is externally provided with the long-distance wireless data transmission high-gain antenna; the unmanned aerial vehicle search seeker is connected with the wireless communication terminal by virtue of a long-distance wireless radio frequency communication module and the long-distance wireless data transmission high-gain antenna; the wireless communication terminal is connected with the wearable individual monitoring wristwatch by virtue of a short-distance RFID (Radio Frequency Identification Device). The battlefield rescue searching system is capable of searching relevant information such as surface personnel, geology and environment in real time, rapidly and accurately positioning an emergency rescue region, and monitoring vital sign information such as the heart rate and body temperature of the injured in real time, meets the emergency rescue requirements of a large-area region and is high in rescue efficiency.

The high-gain waveguide horn array panel antenna comprises: from top to bottom, a top conductive plate with multiple horn holes arranged feeding through hole on bottom on top surface and multiple cavity guide pipes on lower surface, a middle conductive plate with waveguide hole opposite to these in cavity, a thin cable-layer conductive plate, and a bottom conductive plate. This invention can achieve higher precision, reduces weight and cost, and fit wide application.

A phased array antenna system divides the array into a plurality of subarrays that are driven by fine phase shifters with each subarray having a plurality of antenna elements driven by respective coarse phase shifters that are preferably MEMS coarse phase shifters having low weight and low cost and are infrequently used for improved reliability for selecting a coarse beam coverage area while the fine phase shifters are used to scan a high-gain antenna pattern within the selected coarse beam coverage area. Two-bit MEMS phase shifters are used to scan the beams from subarrays to various coverage areas within the required antenna field of view, thereby providing coarse beam steering for an array.

Disclosed is a beam steerable communication apparatus comprising a focusing element with a focal plane, a plurality of antenna elements disposed on the focal plane of the focusing element, a beamforming network which has a plurality of antenna ports and a plurality of beamforming ports, at least one radio frequency transceiver capable to control the phase of carrier frequency signals on its independent outputs, and a baseband modem, wherein each antenna port of the beamforming network is coupled to at least one antenna element, each beamforming port of the beamforming network is coupled to an independent transceiver output, and the phase distribution law formed on the beamforming ports is determined by a baseband modem control commands to the transceivers, said phase distribution law is to combine or distribute signal power on all beamforming ports from or to at least one antenna port of the beamforming network, wherein each radio frequency transceiver includes at least a phase shifter, a Tx / Rx switch, LNA, PA, up and down-conversion mixers, LO generation circuit, receive power combining and transmit power distribution schemes. The technical result of the invention is in the capability of providing efficient beam steering with high gain antennas with all the prospect features of phased antenna arrays, such as the ability to combine / distribute signal power between several RF amplifiers, thus, facilitating linearity requirements and increasing an output power of a transmitter. The present invention can be used, without limitations, in radio relay point-to-point communication systems, e.g. for forming backhaul networks of cellular mobile communication, in car radars and other radars, in local and personal communication systems, in satellite and intersatellite communication systems, etc.

The invention discloses a burst type navigation signal system and a receiving method, relating to the space technology. A signal broadcast carrier can be a navigation satellite, a space balloon or an airship and the like; a navigation signal of the burst type navigation signal system comes from a burst type satellite navigation beacon broadcasted by a straight hair type satellite navigation system or a forwarding type satellite navigation system through a satellite or an intermittent satellite navigation signal; a user terminal uses a high-gain antenna to carry out the time-sharing sky coverage in manners of pitching and azimuth 2-dimensional scanning; and a satellite within the direction scope of the high-gain antenna has the additional signal to interference ratio advantage endowed by the high-gain antenna, thereby the anti-interference effect is reached. With the utilization of the burst signal system and the receiving method, the problem of a large-area phased array antenna in the traditional airspace anti-interference measure is effectively avoided, and the time-frequency domain anti-interference measure is also convenient to carry out simultaneously; and the burst type navigation signal system is easily arranged on a smaller or high-mobility weapon platform and has low cost and high reliability.

An optical disk comprises a disk substrate having a hub and an annular optical metallicized data region extending radially outward from the hub. The optical disk further comprises a radio frequency identification (RFID) transponder affixed to the disk substrate, e.g., within the non-data containing hub region. The optical disk further comprises at least one linear antenna element coupled to the transponder, e.g., via pole lead(s), and extending within the data region. The antenna element(s) can be applied to the disk substrate as a patterned antenna layer over a metallicized data region, and can be electrically isolated from the data region.A method and system of identifying an optical disk is provided. A radio frequency (RF) signal can be transmitted to the optical disk at a range of at least five feet, and preferably at a range of at least ten feet. An RF signal with an identification code (e.g., a unique number) can be received from the optical disk in response to the transmitted RF signal. The activating RF signal can be transmitted by, and the identification RF signal can be received by, e.g., a handheld RF reader or an RF reader that is affixed to a building. The identification code can then be processed for many purposes, such as identifying the optical disk as a non-counterfeited optical disk, calculating a royalty, or tracking the location of the optical disk.

The antenna-integrated module contains a circuit board 1 on which a high frequency circuit is provided, a cover 2 that is composed of a metal plate and is mounted to the circuit board 1 so as to cover almost the entire surface of the circuit board 1, and a dedicated shield case 3 that is composed of a metal plate and is mounted to the circuit board 1 so as to cover a specific region on the circuit board 1. The high frequency circuit comprises a wiring pattern 4 and a ground pattern 5, and electronic parts 6, and the dedicated shield case 3 covers a portion of the high frequency circuit. Leg pieces 2b and 2c of the cover 2 are connected to the wiring pattern 4 and the ground pattern 5. In the cover 2, an upper plate 2a corresponding to a radiation conductor portion functions as both an inverted F-type antenna and a shield case.

The present invention discloses a mm-wave radar sensor to be deployed in the vehicles for seat occupation detection applications. The key system relevant components are utilization of mm-wave integrated radar, specific planar high-gain antenna radiation pattern, and analyzing of the heartbeat and optionally also respiratory dynamics. The method of operation calculates probability of the seat occupation event regarding: detection of the passenger on the seat, detection of a baby or a child on the seat, detection of the presence of a baby or a child in the vehicle after the driver has left the vehicle, detection of the human or animal presence of intrusion in specific vehicle environment. In case that probability is above a predefined threshold, typically the interaction with vehicle control system is initiated using arbitrary automotive interfaces. Corresponding predefined actions are taken in that case. The predefined actions could be one or combination of the following: audio signal alerts to driver, inside cabin light condition change, engine operation condition change, opening of the windows or corresponding communication using arbitrary wireless means to outside vehicle environment. Optionally, the system is utilizing additional parameters like vehicle cabin temperature and / or timing information about engine stop and driver leaving the car. Preferably, the system is using 60 GHz or 77-79 GHz integrated radar front end working in Doppler operation mode, with 4×4 Tx and Rx planar radiation elements, with physical size typically in the range 4×2×1 cm, or smaller.

A dual-frequency high-gain antenna is provided, which includes: a diplexer loop portion disposed at the center of the antenna substrate for receiving a feed signal; two single-frequency radiation units, symmetrically connected to two sides of the diplexer loop portion for radiating a radio-frequency signal corresponding to a first frequency value of the feed signal; and two dual-frequency radiation units, respectively connected to each single-frequency radiation portion for radiating radio-frequency signals corresponding to the first frequency value and a second frequency value of the feed signal.

A radio communication route enables communication from an originating ground station to a destination ground station via one of multiple randomly orbiting satellites with no active attitude control. The ground stations and satellites include multi-feed parabolic antennas for receiving radio signals from and transmitting radio signals in multiple directions. The satellites store an address of a destination ground station from which an initial information signal is transmitted and antenna information identifying the satellite antenna feed on which the initial information signal was received. Plural satellite antennas transmit linking information identifying the satellite to the originating ground station. Data transmissions received at the originating ground station that designate a particular destination are transmitted by the originating ground station using the antenna on which the linking information was received and the satellite retransmits the data transmission using the satellite antenna feed identified by the stored antenna information.

The invention discloses a multi-beam phased array antenna mechanism. M radio frequency signals including K sub-signals can be input through a digital channel; one of N radio frequency signals is counted up by performing switching input on different time nodes by a switch network, and then different digital phase shifting values can be endowed for each sub-signal through a passive multi-beamformingnetwork, various radio frequency signals finally synthesize new M radio frequency signals through power division, thereby completely activating all units of the whole antenna array to form a high-gain antenna radiation beam. The high-gain beam is synthesized by K sub-signals. Through the scheme disclosed by the invention, the simulated multi-beam phased array design is adopted at the horizontal dimension, the digital multi-beam phased array design is adopted at a vertical dimension, thereby avoiding a way of realizing the multi-beam by adding the digital channel on the horizontal dimension inthe prior art, the power consumption of the whole antenna system can be effectively reduced, and the multi-beam can be realized under low power consumption condition so as to satisfy the access of multi-user.

The invention relates to a high-gain G-shaped dual-frequency monopole antenna with a loaded dual-frequency AMC reflection plate, and belongs to the technical field of electromagnetism propagation and receiving. According to the micro-strip-line-feed G-shaped dual-frequency monopole antenna with the loaded dual-frequency AMC reflection plate, the dual-frequency AMC reflection plate is loaded under the G-shaped dual-frequency antenna. The antenna is characterized in that under the condition that the section of the antenna is kept low, the maximum gain of a 2.4-GHz frequency band and a 5.2-GHz frequency band in a WLAN system reaches 7.2dBi, and backward radiation of the 2.4-GHz frequency band and the 5.2-GHz frequency band in the WLAN system reduces by 14.1dB and 13.7dB respectively. The designed high-gain dual-frequency antenna with the loaded AMC reflection plate can be used for a 2.4-GHz system (2.4GHz-2.48GHz) and a 5.2-GHz system (5.15 GHz-5.35GHz) in the WLAN system, and provides guidance for a high-gain antenna working in a dual-frequency WLAN system.

A radiator element for RF transmission and reception over a wide band of frequencies. The radiator element is formed of conductive material on a substrate surface of conductive material in the form of a pair of horns extending in opposite directions to distal tips defining the widest distance of a mouth of a cavity. The mouth reduces in cross section at different slope angles on opposite sides to a narrowest point in between said pair of horns. The resulting radiator element will radiate and receive frequencies. The distance of the widest point and narrowest point are sized to receive and enhance a mid range of said frequencies.

The invention discloses a multibeam cavity-backed high gain antenna array applicable to millimeter wave communication. The antenna array comprises a radiation patch antenna and a wave beam molding feed network, wherein the radiation patch antenna comprises an upper substrate and a lower substrate, an upper surface of the upper substrate is provided with four antenna units with intervals, multiple metallization through holes are circled at periphery of the four antenna units to form a metal cavity, the lower substrate is provided with four substrate integration waveguides, multiple metallization through holes are circled to form each substrate integration waveguide, the four substrate integration waveguides are provided with four input ends of the radiation patch antenna, and the four input ends of the radiation patch antenna are respectively correspondingly connected with four output ends of the wave beam molding feed network. When the four input ends of the wave beam molding feed network are inputted with four paths of electromagnetic wave beam excitation, and phase differences of the adjacent output ends are respectively 45 DEG, 135 DEG, -135 DEG and -45 DEG. The antenna array is advantaged in that surface electromagnetic waves can be effectively inhibited through the added cavity-backed structure, and antenna gain is further improved.

The invention provides an antenna switching method, an antenna switching device and a wireless access point (AP). The antenna switching method comprises the following steps of: monitoring a message sending signal and a channel free signal of the AP; if determining that the AP is receiving a message, acquiring a first sampled value of received power of an omnidirectional antenna; if the first sampled value is a predetermined threshold value higher than a stored second sampled value of the received power of the omnidirectional antenna, switching at least one high gain antenna of the AP, sampling the received power of the currently switched high gain antenna each time when the antennae are switched to acquire the sampled power of the currently switched high gain antenna, and storing the sampled power; and after at least one high gain antenna is completely switched, selecting the high gain antenna with the highest sampled power as a receiving antenna. By the method and the device, antenna switching judgment accuracy can be improved, uplink power from a station to the AP is increased, and the requirement on wide coverage can be met.

The invention discloses an X-band high-gain broadband lens antenna based on a phase gradient multilayer super-surface structure. The antenna exhibits a broadband characteristic by using a microstrip antenna based on H-type slot coupling as a feed source. Furthermore, a super-surface structural unit having a phase gradient variation feature is designed and arranged in accordance with a parabolic focusing equation. Therefore, good low profile characteristics are obtained. A combined super-surface transmission array can convert a normally incident quasi-spherical wave into a plane wave, thereby obtaining a high-gain antenna. The lens antenna operates in the X-band with a center frequency of 10 GHz and the relative bandwidth reaches 20.6%. The antenna gain can be increased from 8.25 dB to 18.98 dB, and the side-lobe level of the super-surface focusing is less than -14.3dB. The simple three-dimensional structure and compact size provide a new method for implementing high-gain antennas, andthe antenna is good in application prospect in field of long-distance wireless communication.

The invention provides a high-gain dielectric resonator antenna applied to a 60 GHz millimeter wave communication system, belongs to the technical field of electromagnetic propagation and receiving and provides a high-gain dielectric resonator antenna based on an H-shaped slot fractal uniplanar compact electromagnetic bandgap (HSF-UC-EBG) structure. The specific implementation is that a circle of HSF-UC-EBG structure is loaded around a radiating main body of a dielectric resonator antenna; and the high-gain dielectric resonator antenna is characterized in that the gain in a working frequency range of the antenna is effectively improved under the conditions of keeping size and section of the dielectric resonator antenna unchanged. The designed high-gain HSF-UC-EBG dielectric resonator antenna can be used in the 60 GHz millimeter wave communication system and provides guidance for designing a high-gain antenna which works in a high-frequency system.

An antenna system for a vehicle including a front windshield glass and a rear windshield is disclosed. The antenna system comprises an antenna unit including a radiating element electromagnetically coupled to an excitation element. The radiating element is coupled to the front windshield glass, and the excitation element is positioned on a passenger compartment interior surface of the front windshield glass. The antenna system also comprises a high-gain antenna unit including first radiating elements, a second radiating element, a 90-degree phase shift circuit, and a low noise amplifier that is coupled to the phase shift circuit. The first radiating elements receive signals through the rear windshield glass. The antenna unit and the high-gain antenna unit may function in a diversity antenna configuration.

An antenna having a central active element and a plurality of passive dipoles surrounding the active element is disclosed. The passive dipoles increase the antenna gain by increasing the radiated energy in the azimuth direction. In another embodiment a plurality of parasitic directing elements extend radially outward from the passive dipoles.