| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 455076000 | Synthesizer | 40 |
| 20080233891 | Method And System For Wireless Communication Using Integrated Clock Generation For Bluetooth And FM Transmit And FM Receive Functions - A method and system for wireless communication using integrated clock generation for Bluetooth and FM transmit and FM receive functions may include generating a clock signal to enable transmission and/or reception of Bluetooth signals; and clocking a Direct Digital Frequency Synthesizer (DDFS) via the generated clock signal to generate one or more signals by the DDFS that enable transmission or reception of FM signals. The generated clock signals for the Bluetooth and for the FM transmit and receive functions may include an in phase and quadrature phase component. Time Division Duplex of FM transmission and reception and simultaneous FM transmission and FM reception may be simulated by switching the control frequency word at a certain rate. The DDFS may also receive control words to compensate for frequency changes in the Bluetooth LO. The FM signals reception and transmission may be controlled by a bi-directional coupler. | 09-25-2008 |
| 20080274704 | Rf Transceiver and a Method of Operation Therein - A RF transceiver and method of operating a transceiver are provided. The transceiver has a frequency synthesizer that generates a stable, operational frequency signal, a reference VCO that provides a reference frequency for use in operation of the synthesizer, a voltage source coupled to the reference VCO that produces a control voltage that controls an output frequency of the reference VCO, and a controller coupled to the voltage source that controls the voltage applied by the voltage source. The controller compares a value of a known frequency of a RF signal received by the transceiver with a value of a current receiver frequency to estimate an error of the current receiver frequency, calculates, using the estimated error, a change needed to the control voltage to change the reference frequency to eliminate the estimated error, and controls the voltage source to apply the calculated change to the control voltage. | 11-06-2008 |
| 20090036064 | DIGITAL INTEGRATED TRANSMITTER BASED ON FOUR-PATH PHASE MODULATION - Briefly, in accordance with one or more embodiments, a transmitter comprises four phase modulators to provide four path phase modulation. The phase modulators modulate local oscillator signals with control signals derived from quadrature baseband data to be transmitted to result in four phase modulated signals. The four phase modulated signals may be combined to provide a pulse position and pulse width modulated signal that may have a constant, or nearly constant, amplitude. The frequency spectrum of the control signals have narrower bandwidths and greater out of band attenuation resulting in higher suppression of out of channel and out of band noise. | 02-05-2009 |
| 20090047913 | Alternate mobile network cell synchronization - A host base transceiver station BTS derives a reference timing signal from a physical layer training signal (such as a preamble) received from a neighbor network node/BTS. Downlink transmissions are then synchronized to the derived reference timing signal. This may be used as a holdover timing mode, such as when the host BTS determines that synchronization from a primary source is no longer reliable. In an embodiment, a reference oscillator of the host BTS is phase locked to the derived reference timing signal. Variations include one or multiple such training signals from one or multiple neighbor BTSs, selecting one BTS when the primary synchronization mechanism fails for several BTSs in the same area, and how to phase lock the oscillator without dithering about the target frequency. Apparatus and computer programs are also detailed. | 02-19-2009 |
| 20090054007 | SEMICONDUCTOR INTEGRATED CIRCUIT - The present invention aims to efficiently calibrate the characteristics of a pair of reception or transmission low-pass filters by a receiving or transmitting circuit. A semiconductor integrated circuit includes an RF receiver that processes an RF reception signal, an RF transmitter that generates an RF transmission signal and a frequency synthesizer. A reception low-pass filter of the RF receiver suppresses undesired components contained in I and Q baseband reception signals. A transmission low-pass filter of the RF transmitter suppresses noise due to D/A conversion, which is contained in I and Q transmission analog baseband signals. A calibration test signal is supplied to the inputs of the pair of reception or transmission low-pass filters. A difference in phase between the pair of filters is detected by a phase detection unit. A calibration controller calibrates a relative mismatch between the cut-off frequencies of the pair of filters. | 02-26-2009 |
| 20090075603 | INTEGRATED CIRCUIT FOR MOBILE RADIO TRANSCEIVERS - The invention relates to an integrated circuit in a mobile radio transceiver. This circuit includes a radio-frequency assembly for producing a mobile radio signal and a modulator for converting transmission data into an analogue, modulated transmission signal which is broadcast in a frequency band outside the mobile radio frequency range. | 03-19-2009 |
| 20090081961 | METHOD AND SYSTEM FOR INJECTION LOCKING AN OSCILLATOR VIA FREQUENCY MULTIPLICATION OF A MULTIPHASE SIGNAL - Aspects of a method and system for injection locking an oscillator via frequency multiplication of a multi-phase signal are provided. A plurality of signals, each of which may be a phase shifted version of a reference signal, may be generated and utilized to generate an output signal. The output signal may be utilized to control a frequency of an oscillator. The frequency of the output signal may be a multiple of the reference frequency, and may be equal to the number of said first signals comprising said plurality. The frequency of the reference signal may be determined based on the number of said first signals comprising said plurality and on a desired frequency of the output signal. The number of signals comprising the plurality of first signals may be determined based on a frequency of said reference signal and on a desired frequency of said output signal. | 03-26-2009 |
| 20090088085 | Apparatus and Methods for Frequency Control in a Multi-Output Frequency Synthesizer - Methods and circuits for synthesizing two or more signals phase-locked to a common reference frequency signal are disclosed. In one embodiment, a method comprises generating first and second output signals phase-locked to a reference clock signal, using first and second phase-locked loop circuits. In response to a detected frequency error in the first output signal, the first output signal is corrected by adjusting a frequency-division ratio in the first phase-locked loop circuit. The second output signal is corrected, separately from the correction to the first output signal, by adjusting a frequency-division ratio in the second phase-locked loop circuit, using an adjustment parameter calculated from the detected frequency error. In another exemplary method, first and second output signals are generated as described above, using first and second phase-locked loop circuits. The first output signal is corrected by adjusting a frequency-division ratio in the first phase-locked loop circuit and generating a control signal to adjust the frequency of the reference clock signal, in response to detected frequency error in the first output signal. Because the second output signal is derived from the common reference clock signal, adjustments to the reference clock frequency will also adjust the frequency of the second output signal. Additional adjustments to the second output signal may be applied in some embodiments by adjusting a frequency-division ratio in the second phase-locked loop circuits. Circuits for implementing the described methods are also disclosed. | 04-02-2009 |
| 20090098833 | OPTICAL MODULE - A first frequency generator outputs a signal at first frequency f | 04-16-2009 |
| 20090098834 | FREQUENCY SYNTHESIZER, RADIO COMMUNICATION SYSTEM, AND SEMICONDUCTOR DEVICE - In transmission frequency modulation in radio communication, correspondences to multiple-value frequency modulation having plural-bits transmission data are realized while suppressing an increase in the circuit area. When performing transmission frequency modulation in radio communication, response data of a digital filter are calculated by a logic circuit that is embedded in a transmission modulator. Since a change amount in the division number is calculated by the logic circuit, a ROM for storing the response data is dispensed with, and thereby an increase in the circuit area can be suppressed when the transmission modulator corresponds to variations in the frequency of a reference signal or to multiple-value frequency modulation having plural-bits transmission data. Further, bandwidth narrowing of a transmission signal spectrum is realized by performing the transmission frequency modulation with dividing the process thereof into plural steps using a timing synchronized with a clock. | 04-16-2009 |
| 20090117856 | FREQUENCY GENERATION IN A WIRELESS COMMUNICATION UNIT - A wireless communication device comprises a frequency generation circuit employing a crystal oscillator operably coupled to a fractional-based synthesiser and a voltage-controlled oscillator. The fractional-based synthesiser utilises a ratio between an integer value and a fractional value to set a radio frequency signal of the voltage-controlled oscillator. An automatic frequency control scaling sub-system is operably coupled to a fractional-based synthesiser and configured to receive and use an AFC word to frequency scale the fractional value in a multiplicative manner to set a radio frequency supported by the fractional-based synthesiser. Preferably, an automatic frequency generation sub-system utilises Absolute Radio Frequency Channel Number and the cyclical nature of the fractional value. | 05-07-2009 |
| 20090124213 | Multi-mode baseband-if converter - A configurable frequency conversion device includes an up-converter, which is arranged to convert an input transmit signal to an interim transmit signal at an intermediate transmit frequency and to convert the interim transmit signal to an output transmit signal at an output frequency. A down-converter is arranged to convert an input receive signal at an input frequency to an interim receive signal at an intermediate receive frequency and to convert the interim receive signal to an output receive signal. Local Oscillator (LO) generation circuitry is arranged to generate multiple LO signals having respective LO frequencies and is coupled to drive the up- and down-converter with the LO signals, and is externally configurable to modify one or more of the LO frequencies so as to modify any of the output frequency, the input frequency, and a separation between the output and input frequencies without changing the intermediate receive and transmit frequencies. | 05-14-2009 |
| 20090137211 | METHOD AND APPARATUS FOR RECONFIGURABLE FREQUENCY GENERATION - A frequency generator ( | 05-28-2009 |
| 20090311972 | SYNTHESIZER AND MODULATOR FOR A WIRELESS TRANSCEIVER - A transceiver including a transmit modulator and a receiver. The modulator may accept a channel selection input, a first modulation input, a second modulation input, and an amplitude input. During transmit time slots, the modulator may generate a modulated output having a carrier frequency selected by the channel selection input. The carrier frequency may be frequency modulated by the first modulation inputs, phase modulated by the second modulation input, and amplitude modulated by the amplitude input. During receive time slots, the modulator may generate a carrier frequency selected by the channel selection input and offset by the first modulation input. The modulator may alternate between providing modulated transmit signals during transmit time slots and providing a local oscillator for the receiver during receive time slots. | 12-17-2009 |
| 20090325510 | SYSTEMS AND METHODS FOR IMPLEMENTING A HARMONIC REJECTION MIXER - Various embodiments of systems and methods for generating local oscillator (LO) signals for a harmonic rejection mixer are provided. One embodiment is a system for generating local oscillator (LO) signals for a harmonic rejection mixer. One such system comprises a local oscillator, a divide-by-N frequency divider, a divide-by-three frequency divider, and a harmonic rejection mixer. The local oscillator is configured to provide a reference frequency signal. The divide-by-N frequency divider is configured to divide the reference frequency signal by a value N and provide an output signal. The divide-by-three frequency divider is configured to receive the output signal of the divide-by-N frequency divider and divide the output signal into three phase-offset signals. The harmonic rejection mixer is configured to receive the three phase-offset signals and eliminate third frequency harmonics. | 12-31-2009 |
| 20100112961 | SINGLE OSCILLATOR TRANSCEIVER - A frequency plan is provided for particular use in a transceiver. Advantageously, a single oscillator may be used to generate desired frequency signals. One or more power splitters receive the signal and equally divide the signal into first and second signals having a frequency substantially equal to the original. Multipliers on each arm of the transceiver receive a signal and increase the frequency of the signal. In one exemplary embodiment, multiple signals having different frequencies may be transmitted over the same cable due in part to the generated frequency separation between the signals. In another exemplary embodiment, multiple signals may be transmitted over multiple cables. In another exemplary embodiment, the frequency plan may self correct a transmit signal based on a reference signal, such as the receive signal. Additionally, multiple signals over one or more cables may be transmitted at or below 3 GHz. | 05-06-2010 |
| 20100130139 | Duty cycle adjustment for a local oscillator signal - A local oscillator (LO) module comprises a local oscillator and a feedback circuit. The local oscillator, biased at a supply voltage, generates a local oscillator signal having a duty cycle. The feedback circuit makes an absolute adjustment of the duty cycle of the local oscillator signal in response to a difference between a first voltage signal, representing a voltage level of the local oscillator signal, and a second voltage signal, representing a voltage level of a portion of the supply voltage corresponding to a desired duty cycle for the local oscillator signal. | 05-27-2010 |
| 20100151801 | Multiple Protocol Signal Detector - A Multiple Protocol Signal Detector, MPSD ( | 06-17-2010 |
| 20110034132 | Systems and Methods for Minimizing Electromagnetic Interface - Systems and methods for minimizing electromagnetic interference are provided. A representative electronic device includes a frequency generator that generates clock signals and a computing device that selects at least one generator frequency that minimizes or eliminates electromagnetic interference based on one or more radio bands of interest. The computing device is designed to send instructions associated with synthesizing the at least one generator frequency. The electronic device further includes a frequency synthesizer that receives the generated clock signals and instructions from the frequency generator and the computing device, respectively. The frequency synthesizer synthesizes the at least one generator frequency based on the received clock signal. | 02-10-2011 |
| 20110136443 | Transceivers - An RF transceiver apparatus comprises transmitter circuitry arranged to convert signals from a baseband frequency to RF transmission frequencies and receiver circuitry arranged to convert signals from RF reception frequencies to the baseband frequency. The transmitter and receiver circuitry each comprise three mixers arranged to convert a signals between the baseband frequency, a first intermediate frequency; a second intermediate frequency that is higher than the transmission frequencies; and a second intermediate frequency to the transmission frequency. | 06-09-2011 |
| 20110171917 | SYSTEM AND METHOD PROVIDING VARIABLE-FREQUENCY IF CONVERSION IN A MULTIMODE COMMUNICATION DEVICE - A system and method providing variable-frequency IF conversion in a multimode communication device. Various aspects of the present invention provide a multimode communication device comprising at least one RF signal receiver adapted to receive at least a first RF signal corresponding to a first communication protocol and a second RF signal corresponding to a second communication protocol. A controllable frequency source may, for example, be adapted to output a mixing signal characterized by one of a plurality of selectable frequencies. Such selectable frequencies may, for example, comprise a first frequency corresponding to the first communication protocol and a second frequency corresponding to the second communication protocol. A mixer may, for example, receive a received RF signal from the RF signal receiver, receive a mixing signal from the controllable frequency source, and convert the received RF signal to an IF signal utilizing the received mixing signal. | 07-14-2011 |
| 20110183631 | METHOD AND SYSTEM FOR TRANSMISSION OR RECEPTION OF FM SIGNALS UTILIZING A DDFS CLOCKED BY AN RFID PLL - Aspects of a method and system for transmission or reception of signals utilizing a DDFS clocked are provided. A first oscillator signal utilized for transmission and/or reception of signals of a first wireless communication protocol may be generated, and a direct digital frequency synthesizer (DDFS) may be clocked by the first oscillator signal to generate one or more second oscillator signals. The one or more second oscillator signals may be modulated to generate a signal adhering to a second wireless communication protocol. The one or more second oscillator signals may be utilized to demodulate signals of the second wireless communication protocol. A control word input to the DDFS may control a frequency of the one or more second oscillator signals generated by the DDFS. Simultaneous transmission and reception of signals of the second wireless communication protocol may be simulated by switching the control word input to the DDFS between two values. | 07-28-2011 |
| 20110319036 | Apparatus and Method for Digitally Controlling Capacitance - An oscillator circuit having a source of an oscillating signal, a tank circuit including an inductor and a capacitor, and a discretely switchable capacitance module configured to control an amount of capacitance in the oscillator circuit. The discretely switchable capacitance module includes, in one embodiment, a capacitor coupled between a first node and a second node, a switch, having a control node, coupled between the second node and a third node; and a DC feed circuit, having a first end coupled to the second node and a second end configured to receive a first or second control signal. The control node of the switch is tied to a predetermined bias voltage. When the first control signal is applied, the capacitor is coupled between the first node and the third node via the switch such that the capacitor is coupled in parallel with the capacitor of the tank circuit, and when the second control signal is applied the capacitor is decoupled from the tank circuit. | 12-29-2011 |
| 20120064839 | FULLY INTEGRATED RADIO TRANSMITTER, RADIO COMMUNICATION DEVICE, AND METHOD OF TRANSMITTING RADIO SIGNAL - A transmitter includes an input unit, a transmission phase locked loop PLL, a local PLL, and a synthesis unit. The input unit is configured to generate a division control signal based on an input signal and channel information. The transmission PLL is configured to generate a modulation signal having a frequency of a GHz band, which varies in response to the division control signal. The local PLL is configured to generate a local signal having the GHz band. The synthesis unit is configured to frequency-synthesize the modulation signal and the local signal to output a transmission signal of a MHz band. | 03-15-2012 |
| 20120064840 | TRANSCEIVER - The transmitter of the transceiver includes: a transmitter-side mixers of a transmitter-side modulator; a transmitter-side voltage-controlled oscillator; and a transmitter-side divider. The divider having a dividing factor of a non-integral number is supplied with an oscillating output of the oscillator. A pair of non-quadrature local signals having a phase difference of 90° plus a predetermined offset angle is produced by the divider and supplied to the mixers. The transmitter includes a phase-shift unit which converts a pair of quadrature transmit signals having a phase difference of about 90° on an analog basis into a pair of non-quadrature shifted transmit signals. Consequently, quadrature modulation is performed by the mixers. Use of a similar configuration enables the reduction in interference of an RF signal with local signals supplied to receiver-side mixers of the receiver. | 03-15-2012 |
| 20120071110 | Frequency Offset Correction - The invention relates to a radio-frequency circuit comprising: a control unit; and a phase-locked loop; wherein the control unit is arranged to determine an offset between an actual value of a reference frequency at the input to the loop on the basis of a measurement of the signal output from the filter of the loop, and a theoretical value of said frequency known to the control unit, via a relation known to the control unit, and to control a correction of said offset. | 03-22-2012 |
| 20120142283 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus using a frequency signal produced by a frequency synthesizer operates at a reduced power consumption and includes a reception portion comprising a first mixer mixing a signal based on the received wireless signal and the frequency signal, a second mixer mixing the first mixer output signal and a local signal, and a demodulation stage demodulating the second mixer output signal. The frequency synthesizer comprises a Voltage Controlled Oscillator (VCO) generating a frequency signal responsive to a variation of a control input voltage, and a feed back circuit receiving as a control input voltage a voltage corresponding to a phase difference between a signal obtained by frequency dividing the output frequency signal of the VCO and a reference clock signal. The VCO is operable at a high frequency that increases with an increase of a bias current. | 06-07-2012 |
| 20130005276 | TRANSCEIVER - A transceiver | 01-03-2013 |
| 20130012142 | Method and Arrangement for Transmitting and Receiving RF Signals Through Various Radio Interfaces of Communication Systems - A method and arrangement for transmitting and receiving RF signals, associated with different radio interfaces of communication systems, employ a direct conversion based transceiver which substantially comprises one receive signal branch and one transmit signal branch. Mixing frequencies of the different systems are generated by a single common by use of an output frequency divider in combination with the synthesizer, and by use of filtering corresponding to a system channel bandwith by means of a controllable low-pass filter operating at baseband frequency. | 01-10-2013 |
| 20140120848 | COMPACT AND LOW-POWER MILLIMETER-WAVE INTEGRATED VCO-UP/DOWN-CONVERTER WITH GAIN-BOOSTING - A wireless data transceiver comprises a local oscillator configured to generate a first time-varying signal of a first frequency at an output of the local oscillator. The transceiver further comprises a local oscillator interface circuit coupled to the local oscillator. The local oscillator interface circuit is configured to generate a second time-varying signal of the first frequency with negative conductance at an output of the local oscillator interface circuit. The negative conductance is generated based on capacitive degeneration. The transceiver further comprises a frequency mixer coupled to the output of the local oscillator interface circuit. The frequency mixer is configured to generate a third time-varying signal of a second frequency based on the second time-varying signal. | 05-01-2014 |
| 20140134961 | Common Local Oscillator For Multiple Transceivers - The specification and drawings present a new apparatus and method for using a common local oscillator for multiple transceivers (e.g., in a BST unit). One or two shared local oscillators LOs/frequency sources in a wireless transceiver may be configured to generate corresponding one or more oscillator signals, so that the corresponding portions of the one or two oscillator signals generated by the one or two LOs may be provided to multiple transmitters and to multiple receivers through corresponding paths in the wireless transceiver. For example it may be a shared use of frequency sources/LOs between multiple pipes/branches of the BST (one local oscillator for all transmitters, and another local oscillator for all receivers in the multiple pipes/branches). The implementation may require proper routing, and amplification and/or frequency conversion if necessary, of the shared LO signals. | 05-15-2014 |
| 20140235182 | TRANSMITTER AND RECEIVER CIRCUITS - An RF transceiver apparatus has transmitter circuitry receiving transmission signals at a transmitter baseband frequency and converting the signals to a transmission frequency, and receiver circuitry receiving signals at a reception frequency and converting to a receiver baseband frequency. A first digital local oscillator and a first mixer convert between the transmitter baseband frequency and a transmitter intermediate frequency. A second digital local oscillator and a second mixer convert between a receiver intermediate frequency and the receiver baseband frequency. A third mixer frequency receives a local oscillator signal for frequency conversion between the transmitter intermediate frequency and the transmission frequency. A fourth mixer frequency receives a local oscillator signal for frequency conversion between the reception frequency and the receiver intermediate frequency. A third local oscillator produces an RF oscillator signal to the third mixer and the fourth mixer to provide the local oscillator signal. | 08-21-2014 |
| 20140323062 | FREQUENCY SYNTHESIS DEVICE AND METHOD - A frequency synthesis device including: a first generator configured to generate a periodic signal of frequency f | 10-30-2014 |
| 20150079912 | MILLIMETER BAND TRANSMITTING/RECEIVING SYSTEM - In the field of millimeter band transmitting/receiving systems for a high-speed contactless transmission, an architecture is provided with a common processing circuit supplying modulation signals and a plurality of transmitting/receiving integrated circuits, all identical to one another, receiving these signals, and also a common clock. The transmitting/receiving integrated circuits each comprise: an oscillator locked with the clock signal to produce a carrier frequency, a transmit channel comprising a first controllable phase shift circuit, a frequency transposition to the carrier frequency, and a power amplifier, a receive channel comprising a low noise amplifier, a frequency transposition from the carrier frequency, and a second controllable phase shift circuit. An antenna is associated with each transmitting/receiving circuit. | 03-19-2015 |
| 20150094001 | Method and Arrangement for Transmitting and Receiving RF Signals Through Various Radio Interfaces of Communication Systems - A method and arrangement for transmitting and receiving RF signals, associated with different radio interfaces of communication systems, employ a direct conversion based transceiver which substantially comprises one receive signal branch and one transmit signal branch. Mixing frequencies of the different systems are generated by a single common by use of an output frequency divider in combination with the synthesizer, and by use of filtering corresponding to a system channel bandwidth by means of a controllable low-pass filter operating at baseband frequency. | 04-02-2015 |
| 20150381190 | FREQUENCY SYNTHESIZER FOR ACHIEVING FAST RE-LOCK BETWEEN ALTERNATE FREQUENCIES IN LOW BANDWIDTH PLLS - A frequency synthesizer that includes a reference frequency scaler and a phase locked loop (PLL) coupled to the reference frequency scaler. The reference frequency scaler is configured to generate a first reference frequency and a second reference frequency. The PLL is configured to generate a first output frequency based on the first reference frequency during a first timeslot and a second output frequency based on the second reference frequency during a second timeslot. The PLL comprises a loop filter that includes a first switch connected in series to a first capacitor and configured to close during the first timeslot and a second switch connected in series to a second capacitor and configured to open during the first timeslot. | 12-31-2015 |
| 20160036485 | PLL CIRCUIT, CALIBRATION METHOD, AND WIRELESS COMMUNICATION APPARATUS - In the stop state of a VCO and an injection locked frequency divider, an ILFD controller sets the control parameter of an injection locked frequency divider on the basis of the frequencies of a reference signal and the frequency-divided signal measured according to the control parameter of the injection locked frequency divider. While the injection locked frequency divider is operated and in the stop state of the VCO, the ILFD controller sets the control parameter of the injection locked frequency divider on the basis of the frequencies of the reference signal and the frequency-divided signal measured according to the control parameter of the injection locked frequency divider. | 02-04-2016 |
| 20160087642 | DITHER-LESS ERROR FEEDBACK FRACTIONAL-N FREQUENCY SYNTHESIZER SYSTEMS AND METHODS - A fractional-N divider of a frequency synthesizer is driven by a dither-less error feedback modulator to alleviate fractional spurious tones introduced by the cyclic train of division ratios from delta-sigma modulators. A first feedback loop generates the feedback signal. A second feedback loop disrupts fractional spurious tones and a third feedback loop provides approximately zero static error. | 03-24-2016 |
| 20160173162 | MOBILE TERMINAL WITH FREQUENCY LOCK LOOP | 06-16-2016 |
| 20160380754 | WIRELESS SYNCHRONIZATION OF MM-WAVE ARRAYS - Systems and methods providing wireless synchronization of wave arrays may include an antenna that receives a wireless injection signal and another antenna that radiates a locked wave signal corresponding to the injection signal. In some embodiments, these systems may also provide a low noise amplifier, voltage controlled oscillator (VCO), buffer amplifier(s), phase shifter, and/or multi-stage amplifier. In some embodiments, the injection signal may be provided on an even harmonic, and the intended transmission frequency signal is on an odd harmonic of the locked signal. The substrate thickness may be designed to radiate electromagnetic waves in odd harmonics of the locked signal. In yet another embodiment, polarization of a receiving antenna may be orthogonal to a transmitter antenna. | 12-29-2016 |
