Roke Manor Research Limited Patent applications |
Patent application number | Title | Published |
20140308903 | System and Method for Sensing Signal Disruption - A system for sensing disruption to a signal propagating along a guiding medium for guiding electromagnetic surface waves, the system comprising: a guiding medium for guiding electromagnetic surface waves; a transmitter arranged to transmit electromagnetic surface waves along the guiding medium; a receiver arranged to receive electromagnetic surface waves transmitted along the guiding medium and to measure changes to a signal transmitted via the guiding medium in order to sense disruption to said signals based on said measured changes. | 10-16-2014 |
20140308901 | System and Method for Detecting Scattered Signals - A system for detecting electromagnetic surface waves scattered from a guiding medium, the system comprising: a guiding medium for guiding electromagnetic surface waves; a transmitter arranged to cause electromagnetic surface waves to be transmitted along the guiding medium; at least one transducer arranged to receive electromagnetic waves scattered from said guiding medium as a result of disruption to a surface wave passing over the guiding medium; and a sensor coupled to the transducer and arranged to detect said received electromagnetic waves. | 10-16-2014 |
20140232585 | OBJECT DETECTOR - An object detector comprising: a transmitter arranged to generate a transmit signal; a transmit loop antenna, coupled to said transmitter and arranged to radiate said transmit signal; and a receive loop antenna arranged to generate a receive signal from received radio waves; wherein said received radio waves include said radiated transmit signal and, in the presence of objects within range of the device which reradiate said transmit signal, one or more radio waves reradiated by such objects; said receive signal includes a component corresponding to said transmit signal and, in the presence of reradiated radio waves, one or more components corresponding to said reradiated radio waves; and said object detector further comprises a signal detector, coupled to said receive loop antenna and said transmitter, the signal detector arranged to detect changes in the amplitude and/or phase of said receive signal which are due to changes in said components corresponding to said reradiated radio waves. | 08-21-2014 |
20140232468 | SUPPRESSION CIRCUIT FOR SUPPRESSING UNWANTED TRANSMITTER OUTPUT - Aspects of the disclosure relate to a frequency suppression circuit arrangement, which allows at least one selected frequency band to be suppressed by coupling the frequency suppression circuit between the input and output of an RF power amplifier. The frequency circuit in the embodiments of the disclosure down-converts a feedback signal derived from the amplified output signal into baseband signals. Each of the baseband signals is fed into an inverting amplifier to generate a negative baseband signal. The negative baseband signal is subsequently filtered to selectively pass the negative baseband signal. The filtered signal is subsequently up-converted into an RF signal. The up-converted RF signal is combined and provided to a coupler connected at the input of the power amplifier such that when the input signal is amplified by the RF power amplifier any signals at the selected frequency can be suppressed. | 08-21-2014 |
20140203667 | Device for the transmission of an electromagnetic signal - A device for the transmission of electromagnetic signals, the device comprising: a conductive element at least one inducer, for inducing charge in said conductive element; a transmission circuit, for generation and transmission of electromagnetic signals; wherein said conductive element and said at least one inducer are movable, with respect to each other, between a plurality of relative positions; in a first position of said relative positions, said at least one inducer is arranged to induce a charge in said conductive element; in a second position of said relative positions, said conductive element is arranged to discharge; the conductive element is arranged to couple with the transmission circuit, in said first position and/or said second position, such that charging and/or discharging of said conductive element causes the transmission circuit to generate and transmit an electromagnetic signal; and the device is arranged such that movement of said device causes relative movement of said conductive element and said at least one inducer between said plurality of relative positions. | 07-24-2014 |
20140198002 | Dipole Antenna - A dipole antenna, comprising: a dipole arrangement comprising at least a pair of antenna arms, each antenna arm having a feed end and a distal end, the feed ends positioned in proximity to each other; a feed structure, coupled to said dipole arrangement, comprising a balun for providing the antenna with a balanced feed; wherein, each antenna arm comprises: a conductive end plate, located at the distal end of the respective antenna arm; and an inductive coil, located at the feed end of the respective antenna arm. | 07-17-2014 |
20140105051 | Method and System for WLAN Connection Control - Embodiments of the invention proxy control the establishment or continued existence of a WLAN connection by using the back end authentication mechanism to authenticate/de-authenticate a WLAN session in dependence on the experienced quality of the connection during the set-up phase or session itself. This has the effect of preventing a bad quality connection from being established or from continuing, and hence should improve the user experience, and help a WLAN network operator maintain a service with high Quality of Service (QoS). | 04-17-2014 |
20130329554 | MOBILE DEVICE AND METHOD - Embodiments of the invention provide the ability to use policy defined by the operator to control the interfaces on which data is sent and received by a device. The policy can be dynamically updated by the operator, by pushing new policy to the device for implementation. The policy can define that the device should switch certain data between two or more available interfaces at certain times, or may define when certain data may be sent or received over a particular interface. Advantageously, the device may receive new policy from the operator in order to help with the operator's own operational objectives. For example, the operator may be engaging in traffic shaping or other traffic limitation, for example to ease congestion or enforce service agreements. | 12-12-2013 |
20130181718 | Buried Object Detector - A buried object detector comprising: a loop antenna and an RF source, the RF source coupled to the loop antenna and arranged to feed the loop antenna with an RF signal, the detector further comprising a detector circuit coupled to the loop antenna and arranged to detect changes in the quality factor of a resonant circuit formed by the loop antenna, wherein the loop antenna is arranged to magnetically couple with a buried object, thereby reducing the quality factor of the resonant circuit. | 07-18-2013 |
20130064311 | Apparatus for the Transmission of Electromagnetic Waves - An apparatus for radio communication using surface waves, the apparatus comprising: a guiding medium having a first surface suitable for the propagation of surface waves, the first surface having a reactive impedance; at least one communication node, the node having a transmitter and/or receiver coupled to a transducer, the transducer positioned on or adjacent the first surface of said guiding medium; wherein the at least one communication node is arranged to launch and/or receive surface waves, over the first surface of said guiding medium. | 03-14-2013 |
20130057433 | Method and Apparatus for Signal Detection - A method for detecting signals using an adaptive transducer arrangement, the arrangement including a transducer array having a plurality of transducers, a beamformer, and an energy detector, the method comprising: determining weights to be applied by the beamformer to signals emitted from each transducer in order to maximise a performance metric; applying the determined weights to the signals emitted from each transducer; measuring the energy received at the energy detector; comparing the measured energy with a predetermined value and based on said comparison determining whether or not one or more signals are present. | 03-07-2013 |
20130039179 | POWER MANAGER AND METHOD - A power manager for a mobile device comprises a traffic shaping unit ( | 02-14-2013 |
20130002512 | Reduced Q Low Frequency Antenna - A rod antenna and antenna circuit are described which make use of negative feedback to reduce the Q of the antenna, but which also makes use of a different coil tapping arrangement to significantly reduce electric field susceptibility on the detected signal from the main coil as well as different biasing arrangements to reduce noise. More particularly, in some embodiments of the invention the main detector coil of the antenna has a centre tap that is AC grounded with signal taps then being taken from the opposite ends of the main coil, and being respectively fed to the inputs of a differential amplifier. The output of the differential amplifier is then fed to the magnetic circuit of the rod antenna via a second inductor winding that is magnetically coupled to the resonance circuit of the main antenna coil. | 01-03-2013 |
20120254388 | Method and apparatus for communications analysis - A method of grouping communication sessions, the method comprising: selecting a plurality of communications sessions from a data stream; determining which data structures, of said communication sessions, occur more frequently than chance; and sorting the communication sessions into groups, wherein communication sessions which have similar data structures, determined to occur more frequently than chance, are sorted into the same group. | 10-04-2012 |
20120218999 | Method and Apparatus for Identifier Correlation - A method of identifier correlation in a communications network, the network comprising: an identifier translator, for translating at least one identifier of a communications packet, wherein a packet which has passed through the identifier translator comprises translated and untranslated identifiers; the method comprising:
| 08-30-2012 |
20120191850 | Networked Probe System - A networked probe system for a communications network ( | 07-26-2012 |
20120166741 | DATA BUS FOR LOW POWER TAG - A power supply and communication system comprising a single-wire data bus, itself having comprising a source end and a termination end, the termination end being connected to ground through a resistance of less than 10Ω. A circuit is connected at the termination end, between the single-wire data bus and ground, and the circuit comprises means for deriving its supply voltage and receiving input data from a time-variant signal applied to the single-wire data bus. | 06-28-2012 |
20120127015 | Multilateration System and Method - A multilateration system and method includes a plurality of receiver stations for receiving signals from an aircraft, and a controller that derives the position of the aircraft by applying a multilateration process to outputs from the receiver stations. For this purpose, the controller determines the altitude of the aircraft and selects a multilateration process that is to be used for position determination, based on the determined altitude. | 05-24-2012 |
20110306386 | Mobile Device and Method - Systems, methods and a mobile device for using policy defined by the operator to control the interfaces on which data is sent and received by the device are provided. The policy can be dynamically updated by the operator, by pushing new policy to the device for implementation. The policy can define that the device should switch certain data between two or more available interfaces at certain times, or when certain data may be sent or received over a particular interface. The device may receive new policy from the operator in order to help with the operator's own operational objectives, such as traffic shaping or other traffic limitation to ease congestion or enforce service agreements. A policy implementing corresponding traffic limitation or shaping on the air interface between the mobile device and network base stations can be sent to the mobile device so as to reduce signaling congestion on the air-interface. | 12-15-2011 |
20100026600 | Radio Wave Detection Apparatus - Radio wave detection apparatus includes an array of antenna elements which are able to receive radio waves which enter and leave the array. In this way antenna elements are able to cater for the detection of different types of polarisation from the one configuration. | 02-04-2010 |
20090303102 | Multilateration System and Method - In the described system the multilateration process to be applied to determine an aircraft's position is chosen on the basis of the available returns, receiver geometry and the height of the aircraft. | 12-10-2009 |
20090289868 | GROUND PLANE - A ground plane for an antenna comprises first and second planar conductors ( | 11-26-2009 |
20090282119 | METHOD OF FILTERING SECTIONS OF A DATA STREAM - A method of filtering sections of a data stream involves determining a set of characters of interest, testing each section of the data stream for the presence of one or more of the set of characters of interest and extracting sections in which at least one of the characters is present. | 11-12-2009 |
20090276427 | Method of Extracting Sections of a Data Stream - A method of extracting sections of a data stream, the sections including a set of sequences. Each sequence is encoded separately and coupled together to define a section. The method involves determining a combination of at least two sequences of the set, comparing the combination of sequences with sequences in the data stream, and rejecting or accepting extraction of the section of the data stream based upon the result of the comparison. If the combination of sequences does not include a start and end marker for the section, a search for the start and end markers is carried out before the section is extracted. | 11-05-2009 |
20090273519 | Multilateration Apparatus - In a multilateration apparatus a correlator is provided with a time of arrival correlation window which is set to cater for the path lengths that may be experienced before a signal from an object to be located is received by receivers in the system. This may be on the basis of the largest possible path length in the system or on a receiver by receiver basis. | 11-05-2009 |
20090219195 | Unwrapping of Phase Values At Array Antenna Elements - A method and apparatus are described for the unwrapping of a set of phase values observed for an incoming signal on a phased array antenna. The difference between values observed on adjacent elements in the array forms a first data set. The differences between adjacent ordinates in the first data set forms a second data set. The values in the second data set are rounded to the nearest whole multiple of one complete cycle before the differencing process is reversed to provide the values (representing a whole number of complete cycles) which are added to the observed phase values to provide the unwrapped phase values. | 09-03-2009 |
20090215405 | Transceiver Antennae Arrangement - An apparatus having a transmitter portion and a receiver portion each isolated from each other and comprising a plurality of antennae, each antenna being selectively connectable to both the receiver portion and transmitter portion, said antennae thus being common to both transmitter and receiver. It may be adapted such that one antenna is selectable to be used as a transmitter whilst at the same time an alternative antenna is selectable to be used as a receiving antenna. | 08-27-2009 |
20090027270 | Apparatus and Method for Determining Receiver Performance in a Multilateration System - In a multilateration system receivers are grouped into two groups. The first group is used to determine a position of a signal source, for example, an aircraft equipped with a SAR transponder. From the determined position, predicted time of arrival values are produced for the second group receivers. These are compared with the actual time of arrival values for the signals arriving at the second group receivers. A difference is determined and then the variation of that difference is determined as the aircraft travels in its track. The groupings are then varied and further variations determined. When the minimum variation is determined an alert is given that the second group has a receiver which is operating with a larger than desirable group time delay. | 01-29-2009 |
20090019220 | Method of Filtering High Data Rate Traffic - A method of filtering high data rate traffic ( | 01-15-2009 |
20080310427 | Method of Determining Reliability of Information - A method of determining reliability of information received at a destination ( | 12-18-2008 |
20080218412 | Quad Polar Transmission - The present invention provides methods and apparatus for MIMO communications across wireless fixed links, comprising a first pair of dual polar antennas, spaced apart in a direction orthogonal to the direction of the fixed link for transmission, and a second such pair for reception, wherein orthogonal polarisations of one of each pair of antennas are oriented intermediate between the orthogonal polarisations of the other of each pair of antennas. | 09-11-2008 |