353 results about "High-gain antenna" patented technology

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.

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.

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.

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 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.

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 omnidirectional wideband high gain antenna which is mainly used for solving the problem that the communication quality at high frequency is reduced owing to fission or upwarping of a directional pattern at the high frequency end of a dipole antenna along with the increasing of frequency in short wave/ultra short wave mobile communication of vehicles, naval vessels and the like. The whole antenna comprises two identical radiating elements (1 and 2) and a wideband feed network (10), wherein each radiating element consists of upper and lower cone oscillators of different structures; the upper cone oscillator (3) is of a composite structure with a cylinder (5) at the upper part and a discone (6) at the lower part; the lower cone oscillator (4) is of a composite structure with a circular truncated cone (7) at the upper part and a cylinder (8) at the lower part; and the upper and lower cone oscillators are connected through spiral stubs (9). The whole antenna works within a 100-400MHz frequency range, the impedance bandwidth and directional pattern bandwidth of the antenna are widened in the working frequency range, and the omnidirectional radiation in the horizontal direction and maximum gain in the horizontal direction of the antenna can be realized.

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.