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| Number | Title | Issue Date |
| 8184052 | Digital beamforming scheme for phased-array antennas A method for beamforming in a communication system includes receiving a plurality of signals via a plurality of antennas, where the plurality of signals corresponds to at least one known training signal, generating a respective one of a plurality of different antenn... | 05/22/2012 |
| 8179314 | Enhanced calibration for multiple signal processing paths in a frequency division duplex system Calibrating signal processing paths for a plurality of transmission devices by obtaining calibration data for at least one of the signal processing paths for each of the transmission devices and determining a plurality of calibration weights from the calibration dat... | 05/15/2012 |
| 8159394 | Selectable beam antenna A selectable beam antenna of generally linear, polygonal, planar or polyhedral form, able to operate at microwave and millimetre wave frequencies, and constructed from associated networks that incorporate radio frequency switches, time delays and amplitude weights p... | 04/17/2012 |
| 8154452 | Method and apparatus for phased array antenna field recalibration A system and method for calibrating a modular phased array antenna after replacement of a component of the modular phased array antenna including a plurality of sub-arrays, each sub-array including a plurality of antenna elements. A complex correction coefficient is... | 04/10/2012 |
| 8138973 | Phased array antenna This invention relates to utilizing a larger number of lower power transmit/receive modules in a phased antenna array in order to utilize cheaper and simpler transmit/receive modules whilst retaining comparable power per unit area as can be achieved through using co... | 03/20/2012 |
| 8106825 | Distributed receiver A distributed receiver in signal communication with an active antenna array is described. The distributed receiver may include an exciter, a plurality of transmit/receive (“T/R”) modules, and a frequency source operable to provide a frequency reference signal to... | 01/31/2012 |
| 8089404 | Partitioned aperture array antenna A partitioned aperture array antenna. The novel antenna includes a first subarray having a first number of antenna elements equipped with transmit functionality and a second subarray having a second number of antenna elements equipped with receive functionality, whe... | 01/03/2012 |
| 8077083 | Deployable antenna system A rapidly deployable HF surface wave radar phased array antenna system is provided, including a plurality of separate antenna elements that are relatively movable to desired spaced apart positions, each antenna element including a respective receiver for receiving H... | 12/13/2011 |
| 8049667 | GPS antenna array and system for adaptively suppressing multiple interfering signals in azimuth and elevation An antenna system has N antenna units stacked on a mast. Each unit has elements for responding to, e.g., GPS signals, and a phasing network that produces mutually orthogonal primary and auxiliary pattern modes at corresponding mode ports of the unit. A number of pow... | 11/01/2011 |
| 8044857 | System and method for correcting global navigation satellite system pseudorange measurements in receivers having controlled reception pattern antennas Global Navigation Satellite System (GNSS) pseudorange measurements are compensated for receiver hardware and directionally dependent antenna errors to obtain desired accuracies for high precision GNSS positioning applications using a multiple element controlled rece... | 10/25/2011 |
| 8009095 | Antenna array and a method for calibration thereof An antenna array (10) for the transmission of signals (20) is disclosed. The antenna array (10) comprises: a plurality of transmission paths (30-1, 30-2, 30-K) for transmitting a plurality of wanted signals (25) and a... | 08/30/2011 |
| 8009096 | Method, system and apparatus for determining antenna weighting for transmit diversity A method, system and apparatus for determining at least one relative characteristic of a transmit diversity transmitter based on at least one quality indicator based on signals received on the plurality of antennas. In some embodiments of the invention, the relative... | 08/30/2011 |
| 7969358 | Compensation of beamforming errors in a communications system having widely spaced antenna elements Systems and methods for operating a communications system. The methods involve computing one or more complex weights to be applied to transmit signals and receive signals by beamformers. The complex weights are based at least on configuration data for the communicat... | 06/28/2011 |
| 7916082 | Field compatible ESA calibration method A method may include cycling a first beam steering control antenna element of an electronically scanned antenna (ESA) array through a first portion of beam steering control states for the first beam steering control antenna element. The first beam steering control a... | 03/29/2011 |
| 7855681 | Systems and methods for determining element phase center locations for an array of antenna elements A method for operating a communications system is provided. The method includes receiving a plurality of signals at a plurality of antenna elements, the plurality of signals arriving at the array of antenna elements at a plurality of angles of arrival (AOAs) with re... | 12/21/2010 |
| 7808430 | Scanned antenna system The invention comprises a feed horn (10) illuminating a circular flat panel (12) formed from a high impedance surface structure. By controlling the resonant frequencies of the individual elements of the array, a controlled phase shift profile is applie... | 10/05/2010 |
| 7777674 | Mobile distributed antenna array for wireless communication A mobile distributed antenna array can include a plurality of mobile platforms, each platform having at least one antenna element and radio equipment coupled to the at least one antenna element. The radio equipment can be capable of transmission, reception, or both ... | 08/17/2010 |
| 7768453 | Dynamically correcting the calibration of a phased array antenna system in real time to compensate for changes of array temperature Adjusting a calibrated phased array includes receiving conditions data describing conditions at a phased array. The phased array comprises antenna element sets, where an antenna element set comprises antenna elements and is associated with a calibration value. The f... | 08/03/2010 |
| 7728771 | Dual band quadpack transmit/receive module A multi-channel, dual-band, radio frequency (RF) transmit/receive (T/R) module, for an active electronically scanned array, is provided. The module includes a compact, RF manifold connector and at least four T/R channels. Each of the T/R channels includes a notch ra... | 06/01/2010 |
| 7728770 | Antenna This invention relates to reducing the complexity and cost of antenna arrays and is more specifically concerned with reducing the complexity of an antenna apparatus (10). It provides an antenna array (62) made up of a vertical stack of horizontal linea... | 06/01/2010 |
| 7692585 | RFID reader and active tag In one embodiment, an RFID reader and active tag (RAT) includes: a first antenna; a second antenna orthogonally aligned with the first antenna; an RFID interface operable to generate RF transmissions to the interrogate RFID tags; a fixed phase variable gain beam for... | 04/06/2010 |
| 7679559 | Null-fill antenna, omni antenna, and radio communication equipment A wide-angle null-fill antenna with no null in the depression angle range, an omni antenna using the same, and radio communication equipment. A null-fill antenna comprises a first antenna array including antenna elements arranged with a prescribed point as the cente... | 03/16/2010 |
| 7671799 | Antenna calibration method and system A phased array antenna system includes an RF front end, a radome, and an optical calibrator embedded in the radome for enabling in-situ calibration of the RF front end. The optical calibrator employs an optical timing signal generator (OTSG), a Variable Optical Ampl... | 03/02/2010 |
| 7671798 | Method and apparatus for optimal combining of noisy measurements A method and system for optimally combining noisy measurements of attributes to obtain a composite statistically useful attribute result is disclosed. The method includes measuring a signal to noise ratio for each carrier in a pair, computing a signal to noise ratio... | 03/02/2010 |
| 7663545 | Method, system and apparatus for determining antenna weighting for transmit diversity A method, system and apparatus for determining at least one relative characteristic of a transmit diversity transmitter based on at least one quality indicator based on signals received on the plurality of antennas. In some embodiments of the invention, the relative... | 02/16/2010 |
| 7609205 | Electrically steerable phased array antenna system An electrically steerable phased array antenna system includes an array of antenna elements and a corporate feed network having an inner region for input of two input signals A and B. The corporate feed network has two outer regions and generating vector combination... | 10/27/2009 |
| 7605754 | Null-fill antenna, omni antenna, and radio communication equipment A wide-angle null-fill antenna with no null in the depression angle range, an omni antenna using the same, and radio communication equipment. A null-fill antenna comprises a first antenna array including antenna elements arranged with a prescribed point as the cente... | 10/20/2009 |
| 7551136 | Multi-beam phased array antenna for limited scan applications Systems and methods are disclosed herein to provide improved phased array antenna system. For example, in accordance with an embodiment of the present invention, a phased array antenna system includes a plurality of horn/filter assemblies. A plurality of modules are... | 06/23/2009 |
| 7545321 | Array antenna calibration apparatus and method The apparatus comprises a calibration signal supply means, which supplies calibration signals to a plurality of antenna elements that are to be subjected to calibration; a calibration signal extracting means, which extracts the calibration signals from signals recei... | 06/09/2009 |
| 7525482 | Mitigation of array factor distortions for GPS and broadband reception An adaptive antenna system may be used with a GPS system to improve operation in the presence of interference signals. A resulting adapted antenna pattern will cause array pattern distortions affecting GPS satellite signals received at some signal arrival angles. By... | 04/28/2009 |
| 7460067 | Systems and methods for dynamically compensating signal propagation for flexible radar antennas A system for dynamically compensating signal propagation for flexible radar antennas receives measurement signals indicating the position of selected locations of an antenna array. The future shape of the antenna array at a future time is predicted, and compensation... | 12/02/2008 |
| 7453398 | Process compensating for array antenna radiating element positioning errors The invention refers to array antennas consisting of a set of individual sources set out over the surface of the antenna and whose mechanical positioning is determined in such a way as to obtain the desired radiation pattern. The process according to the invention i... | 11/18/2008 |
| 7450066 | Phased array antenna system with adjustable electrical tilt A phased array antenna system with adjustable electrical tilt includes an array (62) of antenna elements 621, to 6210. It has a splitter (44) dividing a radio frequency (RF) carrier signal into two signals between wh... | 11/11/2008 |
| 7444157 | Method and apparatus for beam selection in a smart antenna system A method of beam selection in a smart antenna system is provided. The method includes receiving a plurality of uplink beams by a plurality of receivers, each corresponding with one of the plurality of uplink beams. Each uplink beam includes signals transmitted by a ... | 10/28/2008 |
| 7440766 | Method for employing multipath propagation in wireless radio communications A method of employing multipath propagation in wireless radio communications uses an omnidirectional transmitting/receiving antenna at one end of a transmission link to send an interrogating signal across an environment subject to multipath disturbances to a phase-c... | 10/21/2008 |
| 7439901 | Active phased array antenna for aircraft surveillance systems An active antenna is provided that includes an antenna element for transmitting RF transmit signals at a predetermined effective radiated power (ERP). An antenna module is configured to be mounted to an aircraft, with the antenna element being mounted to the antenna... | 10/21/2008 |
| 7436800 | Radio communication scheme In this second radio channel setting example, the grouping is done for each radio mobile stations 98 running on the same lane. A different radio channel is assigned to each group. Accordingly, this prevents the beam patterns using the same channel from inters... | 10/14/2008 |
| 7432855 | RFID reader and active tag In one embodiment, an RFID reader and active tag (RAT) includes: a first beam forming means for interrogating a plurality of RFID tags using at least a first set of two antennas coupled to a first fixed phase feed network, the beam forming means being configured to ... | 10/07/2008 |
| 7423587 | Method for frequency-driven generation of a multiresolution decomposition of the input to wave-based sensing arrays A method for generating a multiresolution decomposition of an array signal by a bank of spatial bandpass filters is disclosed. The signal processing operation is implemented through the use of the directivities of the individual array elements and does not degrade t... | 09/09/2008 |
| 7423586 | Antennas array calibration arrangement and method In a radio communications system, a plurality of transceivers are each connected to one element of an array of antenna elements. In addition, at least one of the transceivers is additionally connected to a calibration antenna for transmitting or receiving test signa... | 09/09/2008 |
