| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | METHODS AND SYSTEMS FOR MODULATING AND DEMODULATING MILLIMETER- WAVE SIGNALS | EP09791483.2 | 2009-08-13 | EP2324581A1 | 2011-05-25 | RIDGWAY, Richard, W. |
| A system comprises an optical processor comprising a sideband generator, an optical filter, and a phase- shift-keying (PSK) modulator, wherein: the sideband generator generates optical frequency sidebands about a carrier frequency of an optical signal; the optical filter discriminates between the optical frequency sidebands and the optical carrier frequency such that optical sidebands of interest can be used to generate an optical millimeter- wave signal; the PSK modulator comprises an optical splitter, an optical phase delay unit, two or more optical gates, and an optical combiner; the optical splitter divides the optical millimeter- wave signal into two or more intermediate signals; the optical phase delay unit delays one or more of the intermediate signals to create distinct phase relationship between them; the optical gates modulate each intermediate signal individually, based on a control input; and the optical combiner combines the gated intermediate signals into a single, PSK-modulated optical millimeter-wave signal. | ||||||
| 82 | VERFAHREN UND VORRICHTUNG ZUR VERARBEITUNG VON TERAHERTZ-WELLEN | EP09732829.8 | 2009-02-03 | EP2269328A2 | 2011-01-05 | BREUNIG, Ingo; BUSE, Karsten; KIESSLING, Jens; KNABE, Bastian; SOWADE, Rosita |
| The invention relates to a method for processing received electromagnetic radiation 1 having several carrier waves in the frequency range between 0.1 and 10 terahertz and information of a signal frequency of less than 50 GHz, particularly of less than 1 GHz, said information being modulated onto the carrier waves, wherein by means of a filter tunable in the frequency range between 0.1 and 10 terahertz an individual carrier wave is filtered out of the received radiation 1 as a terahertz signal, and wherein the filtered-out terahertz signal is supplied to a detection method sensitive to the signal frequency. | ||||||
| 83 | DEPLOYABLE PHOTONIC LINK AND INTERFACE MODULE | EP08844143.1 | 2008-10-31 | EP2250745A1 | 2010-11-17 | BRADBURY, Ian; POPE, Gregory, Steven; ZACHER, Graham, Howard |
| A deployable photonic link is provided, comprising a deployable length of optical fibre and an interface module fusion spliced to at least one end of the optical fibre so that the module is directly connected to the fibre. The interface module comprises at least one of: an input for receiving a first electrical signal comprising a first radio frequency (RF) signal component; and an output for outputting a second RF signal component. The interface module further comprises, respectively, at least one of: a device for receiving the first electrical signal from the input and for producing an optical signal modulated with the first RF signal component for transmission in the optical fibre; and a device for receiving a modulated optical signal and for producing therefrom the second RF signal component for output at the output. An interface module may also contain both the input and the output and the devices for receiving RF signals and for receiving modulated optical signals. | ||||||
| 84 | Photonic tunable filter and corresponding method of filtering electrical signals | EP10155986.2 | 2010-03-09 | EP2228680A1 | 2010-09-15 | Rideout, Howard; Seregelyi, Joe; Lu, Ping; Paquet, Stéphane; Yao, Jianping; Mihailov, Stephen J.; Oldham, John; Caron, Mario |
A microwave photonic filter (300A,300B) and a method of filtering a high frequency electrical signal using photonic components is disclosed. The filter has a serially fiber-coupled laser source (310), a modulator (302), an optical filter (304A,304B), and a photodetector (306). The electrical signal is applied to the modulator. The modulated light propagates through the optical filter which is constructed to pass not only a modulated sideband (323'), but also at least a fraction of light at the carrier frequency (313) of the laser. The photodetector detects a signal at the beat frequency between the carrier and sideband signals, after both signals have propagated through the optical filter. As a result, a separate optical branch for light at the carrier frequency is not required, which considerably simplifies the filter construction and makes it more stable and reliable.
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| 85 | OPTICAL-TO-MILLIMETER WAVE CONVERSION | EP08842299.3 | 2008-09-30 | EP2213020A2 | 2010-08-04 | NIPPA, David, W.; RIDGWAY, Richard, W. |
| A method of converting a modulated optical signal to an encoded electrical signal is provided. The method utilizes a device comprising an electrooptic sideband generator, an optical filter, and an optical/electrical converter. Initially, the modulated optical signal, which carries encoded optical data, is directed to an optical input of the electrooptic sideband generator. The electrooptic sideband generator is driven to generate frequency sidebands about a carrier frequency of the input optical signal. The optical filter is utilized to discriminate between the frequency sidebands and the carrier frequency and combine sidebands-of-interest to yield at least one frequency-converted optical signal comprising a millimeter wave modulation frequency. The frequency converted optical signal carries the encoded optical data and the modulation frequency is a function of the spacing of the sidebands-of-interest. The frequency-converted optical signal is directed to the optical/electrical converter where it is converted to an encoded electrical signal. Additional embodiments are disclosed and claimed. | ||||||
| 86 | ELECTROMAGNETIC TRANSMISSION/RECEPTION SYSTEM | EP04822181.6 | 2004-11-29 | EP1766813A1 | 2007-03-28 | DAVIES, Phillip, Anthony, University of Kent; GOMES, Nathan, Joseph, University of Kent; SHENG, Pengbo, University of Kent |
| An electromagnetic transmission and reception system comprises a transmitter section and a receiver section. The transmitter section has a first signal source, a second signal source at a lower frequency than the first signal source, and means for generating from the first and second signal sources a plurality of signals with fixed frequency spacing derived from the second signal source frequency. One or more pairs of the plurality of signals are selected, and for the or each pair, the signals of the pair are combined to derive an output signal having a frequency derived from the difference between the frequencies of the signals of the pair. The receiver section combines a received signal, which comprises a received version of the output signal, with a local oscillator signal for frequency down-conversion of the received signal. This local oscillator signal is generated by the transmitter section. This provides a system in which the generation of signals of the desired frequency is achieved by mixing signals of specific frequencies. The reception uses frequency down-conversion using the same signal sources as used for the transmission. This enables a low noise system to be implemented. | ||||||
| 87 | CONTINUOUSLY TUNABLE COUPLED OPTO-ELECTRONIC OSCILLATORS HAVING BALANCED OPTO-ELECTRONIC FILTERS | EP04817932.9 | 2004-12-01 | EP1695463A2 | 2006-08-30 | ILCHENKO, Vladimir; ELIYAHU, Danny |
| Devices and techniques for achieving continuous tuning of coupled opto-electronic oscillators with signal filtering in RF or microwave frequencies by optical filtering via two optical resonators in two separate optical paths. | ||||||
| 88 | DISPOSITIF EMETTEUR-RECEPTEUR DE MICRO-ONDES | EP97952085.5 | 1997-12-17 | EP0947033B1 | 2002-11-13 | ELOY, Jean-François-Résidence Rosiers Bellevue, A2 |
| The invention concerns a device for transmitting and receiving an electromagnetic wave train, in which a transmitting unit (1) and a receiving unit (2) are each supplied by light energy traversing an optical guide (13). This light can be stopped by an optical gate (19). Otherwise, it reaches a micro-laser (4) which illuminates a photoconductive film (5) on which an antenna (3) is set. The transmitter antenna (3) parts (6, 7), with different potentials, are then short-circuited and an electromagnetic wave train is transmitted. The wave train traverses a medium to be studied and is sent to the receiver unit (2) where it is sampled, recorded and exploited for deducing therefrom the composition of the traversed medium. The wave train has a wideband frequency, and the optoelectronic control device enables the construction of a very compact system. | ||||||
| 89 | Optische Sendeeinrichtung und Nachichtenübertragungssystem | EP94100425.1 | 1994-01-13 | EP0607868B1 | 1997-03-05 | Schmuck, Harald |
| 90 | EINRICHTUNG ZUR GENERIERUNG OPTISCHER SIGNALE | EP93908951.0 | 1993-04-16 | EP0637405A1 | 1995-02-08 | BIRKMAYER, Wolfram; WALE, Michael, John 53 Bengal Lane Green Norton; BUCK, Brian, Jeffrey; HOLDEN, Anthony, James |
| A device for generating optical signals is suitable in optical radiation shaping networks for micro-wave antennae, dispensing with the previously required costly circuits. The output currents from a linear arrangement of separate photodiodes are summed into a single electric transmission line. Implementation examples are disclosed. | ||||||
| 91 | Optische Sendeeinrichtung und Nachichtenübertragungssystem | EP94100425.1 | 1994-01-13 | EP0607868A1 | 1994-07-27 | Schmuck, Harald |
Die Erfindung betrifft einen Mikrowellen-Generator. Dieser ist gekennzeichnet durch einen mehrere Moden aufweisenden Faser-Ring-Laser (1), dem eine die Mikrowellenfrequenz durch Differenzbildung der den Moden zugeordneten Frequenzen erzeugende Zwischenfrequenz-Einrichtung (22) zugeordnet ist. |
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| 92 | OPTO-ELECTRONIC OSCILLATOR AND METHOD OF GENERATING AN ELECTRICAL CARRIER SIGNAL | EP16700398.7 | 2016-01-07 | EP3400485A1 | 2018-11-14 | PULERI, Marzio; D'ERRICO, Antonio; GHELFI, Paolo; BOGONI, Antonella; SERAFINO, Giovanni; SORIANELLO, Vito; PORZI, Claudio |
| An opto-electronic oscillator (10) comprising: an optical source (12) to generate an optical carrier signal having a carrier wavelength; an optical phase modulator (14) to apply a sinusoidal phase modulation to the optical carrier signal to generate two first order sidebands having a π phase difference between them; an optical phase shifter (16) comprising an optical resonator configured to apply a substantially π phase-shift to one of the first order sidebands at a preselected wavelength within an optical spectrum of said first order sideband; and a photodetector (18) configured to perform optical heterodyne detection of the optical carrier signal with both: said one of the first order sidebands substantially π phase shifted by the optical resonator; and the other of the first order sidebands, to generate an electrical carrier signal (20), and wherein a first part of the electrical carrier signal (20a) is delivered to an electrical output (22) and a second part of the electrical carrier signal (20b) is delivered to the optical phase modulator as a drive signal. | ||||||
| 93 | PHOTONIC SYSTEM AND METHOD FOR TUNABLE BEAMFORMING OF THE ELECTRIC FIELD RADIATED BY A PHASED ARRAY ANTENNA | EP10809198.4 | 2010-12-09 | EP2592768B1 | 2018-05-02 | VIDAL DRUMMOND, Miguel; NUNES NOGUEIRA, Rogério |
| This invention discloses a photonic system to beamform the electric field yield by a phased array antenna. The system function relies on a photonic tunable delay line, which consists on an optical Mach-Zehnder interferometer with a predefined time delay difference between arms. The time delay is tuned by adjusting the coupling ratio between the power applied to each one of the interferometer's delay lines. Three embodiments are proposed, wherein one of them just uses a single delay line and a single monchromatic light source, independently of the quantity of the array elementary antennas. | ||||||
| 94 | DUAL-FREQUENCY OPTICAL SOURCE | EP15783006 | 2015-01-26 | EP3097614A4 | 2017-08-30 | VAHALA KERRY; LI JIANG; DIDDAMS SCOTT; YI XU; LEE HANSUEK |
| A microwave-frequency source at frequency fM comprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at v2 and v1 to generate sideband signals at v1±n1fM and v2±n2fM. The bandpass filter transmits sideband signals at v1+N1fM and v2−N2fM. The optical detector generates a beat note at (v2−N2fM)−(v1+N1fM). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fM drives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal. | ||||||
| 95 | STABILIZED MICROWAVE-FREQUENCY SOURCE | EP15780751 | 2015-01-26 | EP3097615A4 | 2017-08-23 | VAHALA KERRY; DIDDAMS SCOTT; LI JIANG; YI XU; LEE HANSUEK |
| A microwave-frequency source at frequency fM comprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at v2 and v1 to generate sideband signals at v1±n1fM and v2±n2fM. The bandpass filter transmits sideband signals at v1+N1fM and v2−N2fM. The optical detector generates a beat note at (v2−N2fM)−(v1+N1fM). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fM drives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal. | ||||||
| 96 | PHASED-ARRAY RADIO FREQUENCY RECEIVER | EP15815384.1 | 2015-07-03 | EP3164677A1 | 2017-05-10 | SCHUETZ, Chris; MURAKOWSKI, Janusz; SCHNEIDER, Garrett; SHI, Shouyuan; PRATHER, Dennis |
| A method of RF signal processing comprises receiving an incoming RF signal at each of a plurality of antenna elements that are arranged in a first pattern. The received RF signals from each of the plurality of antenna elements are modulated onto an optical carrier to generate a plurality of modulated signals that each have at least one sideband. The modulated signals are directed along a corresponding plurality of optical channels with outputs arranged in a second pattern corresponding to the first pattern. A composite optical signal is formed using light emanating from the outputs of the plurality of optical channels. Non-spatial information contained in at least one of the received RF signals is extracted from the composite signal. | ||||||
| 97 | RADIO FREQUENCY SIGNAL TRANSCEIVER, COHERENT RADAR RECEIVER AND METHOD OF PROCESSING RADIO FREQUENCY SIGNALS | EP12718648.4 | 2012-04-30 | EP2845332B1 | 2017-03-29 | GHELFI, Paolo; BOGONI, Antonella |
| An RF signal transceiver comprising a mode-locked laser to output an optical signal having a plurality of phase-locked modes, an optical splitter to power split the optical signal into a transmitter optical signal and a receiver optical signal; a transmitter apparatus to receive the transmitter optical signal and comprising an optical filter to select two of the modes, an optical modulator to modulate a part of the transmitter optical signal to form at least one phase modulated optical signal, and a photodetector to heterodyne the phase modulated optical signal with one of the modes without a corresponding phase modulation to form an RF signal for transmission; and a receiver apparatus arranged to receive an RF signal and the receiver optical signal and comprising an optical modulator to modulate the receiver optical signal with the received RF signal; and an optical to electrical signal conversion apparatus to convert the modulated receiver optical signal into a corresponding electrical signal. | ||||||
| 98 | HIGH PERFORMANCE COMPACT RF RECEIVER FOR SPACE FLIGHT APPLICATIONS | EP14861339.1 | 2014-10-23 | EP3069411A1 | 2016-09-21 | KARRAS, Thomas W.; ROBERTSON, Stephen V.; SROGA, Jeffrey T.; PAOLELLA, Arthur |
| A compact photonic radio frequency receiver system includes a laser source that is configured to generate laser light Radio frequency (RF) and local oscillator (LO) input ports may receive RF and LO signals, respectively. One or more miniature lithium niobate waveguide phase modulators may be coupled to the laser source to receive the RF and LO signals and to modulate the laser light with the RF and LO signals in a first and a second path, and to generate phase-modulated laser lights including an RF-modulated light signal and an LO-modulated light signal. A first and a second miniature filter may be coupled to the miniature lithium niobate waveguide to separate a desired spectral band in the phase-modulated laser light of the first path and to facilitate wavelength locking of the laser light of the second path. An optical combiner may combine output laser lights of the first and second filters. | ||||||
| 99 | PHOTONIC RF GENERATOR | EP12702283.8 | 2012-02-07 | EP2813010B1 | 2016-01-13 | GHELFI, Paolo; SCOTTI, Filippo; LAGHEZZA,Francesco; BOGONI, Antonella |
| 100 | PHOTONIC RF GENERATOR | EP12702283.8 | 2012-02-07 | EP2813010A1 | 2014-12-17 | GHELFI, Paolo; SCOTTI, Filippo; LAGHEZZA,Francesco; BOGONI, Antonella |
| An RF signal generator (50) has an optical part (10) for outputting optical carrier signals separated in optical frequency, and a modulator (20) arranged to modulate the optical carrier signals with an intermediate frequency to generate sidebands. A phase modulation is applied to one or more of the sidebands or the optical carriers, without applying the phase modulation to others of the signals, and the modulator has integrated optical paths for both the phase modulated signals and for the others of the signals. A detector part (30) carries out heterodyne detection to combine the phase modulated and other signals to output an RF signal having the phase modulation. By having integrated optical paths, the relative phase of these optical paths can be more stable than using a fiber sagnac interferometer and optical isolator thus enabling use in advanced radio communications. | ||||||
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