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32results about How to "Good harmonic suppression" patented technology
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Combined matching and filter circuit
ActiveUS20050282503A1Good harmonic suppressionImprove abilitiesMultiple-port networksOne-port networksCapacitanceHarmonic
A combined matching and harmonic rejection circuit with increased harmonic rejection provided by a split resonance for one or more of the capacitive or inductive elements of the circuit. At a fundamental frequency, the circuit comprises an inductive series arm with capacitive shunt arms. The capacitance of a shunt arm may be provided by two or more parallel paths, each having a capacitor and an inductor in series so that, in addition to providing the effective capacitance necessary for impedance matching at the fundamental frequency, two separate harmonics represented by the series resonances of the parallel paths are rejected. In this manner, an extra null in the circuit's stop-band may be achieved using the same number of shunt elements necessary to achieve impedance matching at the fundamental frequency.
Owner:MACOM TECH SOLUTIONS HLDG INC
Balun transformer with improved harmonic suppression
ActiveUS20090195324A1Improve performanceImprove device performanceMultiple-port networksOne-port networksTransformerHarmonic
An electronic assembly includes a substrate (66), a balun transformer (42) formed on the substrate (66) and including a first winding (50) and a second winding (52), each having respective first and second ends, and a reaction circuit component (48) formed on the substrate (66) and electrically coupled to the second winding (52) between the first and second ends thereof. The balun transformer (42) and the reaction circuit component (48) jointly form a harmonically suppressed balun transformer having a fundamental frequency, and the reaction circuit component (48) is tuned such that the harmonically suppressed balun transformer resonates at a selected harmonic of the fundamental frequency.
Owner:NXP USA INC
Secondary harmonic inhibition method for broadband helix travelling wave tube
ActiveCN105304438AImprove overall tube performanceGood harmonic suppressionTravelling-wave tubesTransit-tube circuit elementsHarmonic mitigationHarmonic
The invention discloses and especially relates to a secondary harmonic inhibition method for a broadband helix travelling wave tube, and belongs to the technical field of broadband helix travelling wave tubes. Within a certain range, a travelling wave tube harmonic inhibition situation becomes greater if a distance between a fin to a center is reduced, however, the reduced distance will make the fin closer to a helix and might cause engineering machining troubles and many other potential troubles. Therefore, two different fin structures are adopted by an input segment and an output segment respectively, and the distance from a fin on the input segment to the center is made to be greater. Through the even and symmetric fin structure, a better harmonic inhibition effect is exhibited, and other factors in terms of the design of a travelling wave tube can be better weighed.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Harmonic reject mixer with active phase mismatch compensation in the local oscillator path
ActiveUS8461901B1Minimize mismatchGood practicalModulation transferenceComputing operation arrangementsPhysicsActive phase
A harmonic rejection mixer having a phase rotator fed by a local oscillator signal. The local oscillator signal has a reference frequency. The phase rotator produces a plurality of output signals, each one of the signals having a common frequency related to the reference frequency and having different relative phase shifts. A plurality of mixer sections, each one of the sections being fed an input signal and a corresponding one of the plurality of output signals mixes the local oscillator signal with the corresponding one of the plurality of output signals fed thereto. A combiner combines the mixer signal from the plurality of mixer sections into a composite output signal. A detector detects energy in a harmonic of the composite signal and for adjusting the output signal of the phase rotator to reduce the selected harmonic of the composite signal.
Owner:RAYTHEON CO
Balun transformer with improved harmonic suppression
ActiveUS7683733B2Good harmonic suppressionImprove performanceMultiple-port networksOne-port networksTransformerHarmonic
Owner:NXP USA INC
Signal filtering
ActiveUS9191127B2Reduced harmonic foldingSpeed up the descentNetwork topologiesNetworks with variable switch closing timeEngineeringClock generator
A signal filter (100) comprises a first transferred impedance filter, TIF, (TIFA) having four differential signal paths (PA,1, PA,2, PA,3, PA,4) and a second TIF (TIFB) having four differential signal paths (PB,1, PB,2, PB,3, PB,4)- A first differential signal port of the first TIF (32A) is coupled to a first differential signal port of the second TIF (32B). A first clock generator (12A) is arranged to provide first-TIF clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKA,Q−) having four non-overlapping phases for selecting the respective first-TIF differential signal paths (PA,1, PA,2, PA,3, PA,4), and a second clock generator (12B) is arranged to provide second-TIF clock signals (CLKB,I+, CLKB,Q+, CLKB,J−, CLKB,Q−) having four non-overlapping phases for selecting the respective second-TIF differential signal paths (PB,1, PB,2, PB,3, PB,4). The phases of the second-TIF clock signals (CLKB,I+, CLKB,Q+, CLKB,I−, CLKB,Q−) are equal to the phases of the first-TIF clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKA,Q−) delayed by 45 degrees. The first-TIF first, second, third and fourth clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKAQ−) and the second-TIF first, second, third and fourth clock signals (CLKB,I+, CLKB,Q+, CLKB,I−, CLKB,Q−) have a duty cycle in the range 16.75% to 25%.
Owner:TELEFON AB LM ERICSSON (PUBL)
Filter direct synthetic method
InactiveCN104363004AIncrease flexibilityGood harmonic suppressionDigital technique networkTransmission zerosDigital filter design
The invention discloses a filter direct synthetic method. By means of the filter direct synthetic method, the transmission zero points of filters can be flexible arranged, a smoothing polynomial of the filters can be led out, and the smoothing polynomial includes all information of the filters and can be directly used for achieving the filters. Effective connection is conduced through some basic structures which can achieve one or more transmission zero points, an achieving network of the filters is finally obtained, and modularization synthesis can be achieved; the method can be used for designing digital filters through bilinear transformation; the types of the filters comprise the low-pass type, the high-pass type, the band-pass type, the band elimination type and the like. The filter direct synthetic method has the advantages of being simple, fast and accurate.
Owner:肖飞
Filter for electronic signals and method for manufacturing it
InactiveCN101630764ALow priceGood harmonic suppressionWaveguide type devicesElectrical conductorCoupling
A filter (1) for electronic signals comprises a dielectric body (10), at least two coupling structures (19, 40 - 42) for coupling in and coupling out electronic signals, and one or more conductors (18) on surface portions of the body, wherein an outer surface of the body comprises one or more indentations (20). The coupling structure (40) comprises a coupling conductor (42) for signal input and / or output, and in relation to an end portion (42b) of said conductor a coupling hole (41) extending from said first surface and / or from a second surface opposite the first surface into the body.
Owner:NOKIA SOLUTIONS & NETWORKS OY
Combined matching and filter circuit
ActiveUS7660562B2Good harmonic suppressionImprove abilitiesMultiple-port networksOne-port networksCapacitanceSoftware engineering
A combined matching and harmonic rejection circuit with increased harmonic rejection provided by a split resonance for one or more of the capacitive or inductive elements of the circuit. At a fundamental frequency, the circuit comprises an inductive series arm with capacitive shunt arms. The capacitance of a shunt arm may be provided by two or more parallel paths, each having a capacitor and an inductor in series so that, in addition to providing the effective capacitance necessary for impedance matching at the fundamental frequency, two separate harmonics represented by the series resonances of the parallel paths are rejected. In this manner, an extra null in the circuit's stop-band may be achieved using the same number of shunt elements necessary to achieve impedance matching at the fundamental frequency.
Owner:MACOM TECH SOLUTIONS HLDG INC
Calibration of passive harmonic-rejection mixer
ActiveUS20120105128A1Good harmonic suppressionModulation transferenceComputations using contact-making devicesAudio power amplifierControl signal
An electronic device comprising a passive harmonic-rejection mixer (400) and a calibration circuitry (425). The passive harmonic rejection mixer has an input (102) connected to several sub-mixer stages (402), and the sub-mixer stages are connected to a summing module (406,408) for generating the output (104). Each sub-mixing stage comprises a gating module (414), an amplifier (416), and a weighting module (418), the gating module selectively passing the input signal or the input signal with inverted polarity under the control of control signals. The calibration circuitry (425) is adapted to input a reference signal (430) to the input of the mixer, receive an output signal (104) from the output of the mixer, and set the weights (K1, K2, K3, K4) of the weighting modules to make the output signal match an expected output signal.
Owner:NXP BV
4.0-5.0 GHz 8W GaN monolithic power amplifier and design method
ActiveCN106067771AOptimized Stability FactorHigh gainPower amplifiersAmplifier input/output impedence modificationAudio power amplifierEngineering
The invention discloses a 4.0-5.0 GHz 8W GaN monolithic power amplifier and a design method. The amplifier comprises an input matching network, an inter-stage matching network, an output matching network and pHEMT transistors; the input matching network is connected with the inter-stage matching network through one pHEMT transistor; the inter-stage matching network is connected with the output matching network through four pHEMT transistors; a gate bias power source is connected with the input matching network and the inter-stage matching network; and a drain bias power source is connected with the inter-stage matching network and the output matching network. According to the 4.0-5.0 GHz 8W GaN monolithic power amplifier and the design method of the invention, the design difficulty of a modular circuit is simplified, the size of the modular circuit is reduced significantly compared with the size of a traditional hybrid integrated circuit; the optimal load impedance and optimal source impedance of the transistors are determined; the circuit schematic diagrams of the input matching network, the output matching network and the inter-stage matching network are designed; indexes such as a stabilization coefficient, an input and output standing wave system, gain, power, efficiency and harmonic suppression are optimized; and the layout of the monolithic microwave power amplifier is designed.
Owner:成都泰格微电子研究所有限责任公司
Signal Filtering
ActiveUS20150016492A1Good harmonic rejectionImprove harmonic rejectionNetwork topologiesNetworks with variable switch closing timeClock generatorEngineering
A signal filter (100) comprises a first transferred impedance filter, TIF, (TIFA) having four differential signal paths (PA,1, PA,2, PA,3, PA,4) and a second TIF (TIFB) having four differential signal paths (PB,1, PB,2, PB,3, PB,4)−. A first differential signal port of the first TIF (32A) is coupled to a first differential signal port of the second TIF (32B). A first clock generator (12A) is arranged to provide first-TIF clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKA,Q−) having four non-overlapping phases for selecting the respective first-TIF differential signal paths (PA,1, PA,2, PA,3, PA,4), and a second clock generator (12B) is arranged to provide second-TIF clock signals (CLKB,I+, CLKB,Q+, CLKB,J−, CLKB,Q−) having four non-overlapping phases for selecting the respective second-TIF differential signal paths (PB,1, PB,2, PB,3, PB,4). The phases of the second-TIF clock signals (CLKB,I+, CLKB,Q+, CLKB,Q−) are equal to the phases of the first-TIF clock signals (CLKA,I+, CLKA,Q+, CLKA,I−, CLKA,Q−) delayed by 45 degrees. The first-TIF first, second, third and fourth clock signals (CLKA,I+, CLKA,Q+, CLKA,I−L, CLKAQ−) and the second-TIF first, second, third and fourth clock signals (CLKB,I+, CLKB,Q+, CLKB,I−, CLKB,Q−) have a duty cycle in the range 16.75% to 25%.
Owner:TELEFON AB LM ERICSSON (PUBL)
TE01 mixing cavity filter device
ActiveCN104485497AImprove coupling coefficientSimple structureWaveguide type devicesFar distanceResonant cavity
The invention relates to a TE01 mixing cavity filter device and provides an implementation method for a TE01 dielectric resonator and coaxial metal resonator mixing cavity filter. According to a mixed structure which integrates the advantages, such as high Qvalue and stable temperature coefficient of TE01 dielectric resonators as well as relatively far distance between higher-order modes and main modes of coaxial metal resonators, the TE01 dielectric resonators and the coaxial metal resonators are arranged in a mutually crossed manner, the TE01 dielectric resonators are assembled on the side surface of a cavity body, and the space between each coaxial metal resonator and each TE01 dielectric resonator is changed by moving a tuning plate so as to realize the purpose of tuning the frequencies of the TE01 dielectric resonators. The TE01 mixing cavity filter device disclosed by the invention is applicable to metal resonant cavity devices, such as a metal resonant cavity filter, a duplexer and a combiner which can satisfy out-of-band rejection, but cannot realize insertion loss under a condition of limited volume, and can be applicable to devices, such as a TE01 dielectric resonant cavity filter, a duplexer and a combiner which can satisfy out-of-band rejection and insertion loss, but cannot meet a coupling coefficient required by larger relative bandwidth.
Owner:WUHAN HONGXIN TELECOMM TECH CO LTD
Calibration of passive harmonic-rejection mixer
ActiveUS8660508B2Good harmonic suppressionModulation transferenceTransmission monitoringAudio power amplifierControl signal
An electronic device comprising a passive harmonic-rejection mixer (400) and a calibration circuitry (425). The passive harmonic rejection mixer has an input (102) connected to several sub-mixer stages (402), and the sub-mixer stages are connected to a summing module (406, 408) for generating the output (104). Each sub-mixing stage comprises a gating module (414), an amplifier (416), and a weighting module (418), the gating module selectively passing the input signal or the input signal with inverted polarity under the control of control signals. The calibration circuitry (425) is adapted to input a reference signal (430) to the input of the mixer, receive an output signal (104) from the output of the mixer, and set the weights (K1, K2, K3, K4) of the weighting modules to make the output signal match an expected output signal.
Owner:NXP BV
Harmonic rejection mixer
ActiveUS20110105018A1Good harmonic suppressionReduce output frequencyTransmission noise suppressionRadio relay systemsFrequency mixerHarmonic
A harmonic rejection mixer for carrying out a frequency translation of a mixer input signal having a mixer input frequency, the mixer including an up-conversion mixer for generating an intermediate signal by multiplying the mixer input signal with a first local oscillation signal having a first local oscillation frequency, and a down-conversion mixer for generating a mixer output signal by multiplying the intermediate signal with a second local oscillation signal having a second local oscillation frequency. The first local oscillation frequency and the second local oscillation frequency are greater than the mixer input frequency. The first local oscillation signal is an l-time oversampled sine wave and the second local oscillation signal is an m-time oversampled sine wave.
Owner:STMICROELECTRONICS DESIGN & APPL
Broadband integrated vector signal modulation device and method
ActiveCN110708126AReduce measurement errorImprove the isolation indexTransmitters monitoringReceivers monitoringRadio frequency signalBroadbanding
The invention provides a broadband integrated vector signal modulation device and method, and the device comprises a calibration unit, a waveband selection unit, and a broadband vector modulation andoutput unit, and the calibration unit receives an external calibration signal or employs an output signal of an internal calibration source as a reference excitation source; wherein the waveband selection unit is used for receiving an externally input radio frequency signal and selecting high and low frequencies, and a low-frequency signal of which the frequency range is in a first waveband directly enters the low-frequency conditioning unit to be modulated and then is sent to the sampler to be directly sampled; and the high-frequency signal with the frequency range in the second waveband andthe reference signal jointly enter the signal attenuation and segmented filtering unit to be subjected to signal amplitude adjustment and filtering, and then are sequentially transmitted to the powercompensation unit and the vector modulation and output unit to be subjected to vector modulation.
Owner:CHINA ELECTRONIS TECH INSTR CO LTD
Ultra-broadband microwave radiometer optimized for microsatellite applications
A microwave radiometer with reduced volume, mass, phase noise, and power requirements and increased harmonic rejection, includes a fixed number of frequency banks configured to provide signals within separate, non-overlapping local oscillation frequency bands, a detection circuit configured to detect one or more microwave RF signals, and an RF downconverter configured to mix the signals within the separate, non-overlapping local oscillation frequency bands with the one or more microwave RF signals to provide a continuous range of down converted frequencies.
Owner:NASA
Dual-polarization three-band frequency reconfigurable antenna with reconfigurable harmonic suppression function
ActiveCN110858681AWide working frequency bandDoes not affect VSWRSimultaneous aerial operationsRadiating elements structural formsReconfigurable antennaAntenna polarization
The invention relates to a dual-polarization three-band frequency reconfigurable antenna with a reconfigurable harmonic suppression function, which comprises an upper dielectric substrate, a lower dielectric substrate, an upper antenna reconfigurable radiation unit, a lower antenna reconfigurable radiation unit, an upper reconfigurable filtering structure and a lower reconfigurable filtering structure. Frequency reconfiguration of three bands and antenna polarization reconfiguration are realized, and meanwhile, when the antenna works in different bands, harmonic waves of each band are suppressed, and normal work of other bands is not influenced.
Owner:XIDIAN UNIV
Power processing circuit and multipath amplification circuit
A power processing circuit includes a first portion, a second portion, a third portion, a resistor, a first coupling portion, and a second coupling portion. The first portion, the second portion, and the third portion are connected to respective external components. The resistor is used for isolating signals between the second portion and the third portion. The first coupling portion and the second coupling portion are substantially U-shaped coupling structures and are positioned at different sides of the resistor. The first coupling portion is connected to the first portion, the second portion, and ground. The second coupling portion is connected to the first portion, the third portion, and ground.
Owner:NANNING FUGUI PRECISION IND CO LTD
filter direct synthesis method
InactiveCN104363004BIncrease flexibilityGood harmonic suppressionDigital technique networkTransmission zerosDigital filter design
The invention discloses a filter direct synthetic method. By means of the filter direct synthetic method, the transmission zero points of filters can be flexible arranged, a smoothing polynomial of the filters can be led out, and the smoothing polynomial includes all information of the filters and can be directly used for achieving the filters. Effective connection is conduced through some basic structures which can achieve one or more transmission zero points, an achieving network of the filters is finally obtained, and modularization synthesis can be achieved; the method can be used for designing digital filters through bilinear transformation; the types of the filters comprise the low-pass type, the high-pass type, the band-pass type, the band elimination type and the like. The filter direct synthetic method has the advantages of being simple, fast and accurate.
Owner:肖飞
Power processing circuit and multi-channel amplifier circuit
Owner:NANNING FUGUI PRECISION IND CO LTD
4.0-5.0ghz 8W GaN Monolithic Power Amplifier and Design Method
ActiveCN106067771BOptimized Stability FactorHigh gainPower amplifiersAmplifier input/output impedence modificationAudio power amplifierComputer module
Disclosed are a 4.0-5.0 GHz 8W GaN monolithic power amplifier and a design method thereof. The amplifier comprises an input matching network, an interstage matching network, an output matching network, and a set of pHEMT transistors. The input matching network is connected to the interstage matching network by means of one pHEMT transistor. The interstage matching network is connected to the output matching network by means of four pHEMT transistors. A gate bias power supply is respectively connected to the input matching network and the interstage matching network. An interstage gate matching bias power supply is respectively connected to the interstage matching network and the output matching network. The invention addresses the difficulties of designing a modular circuit, is much smaller than a conventional hybrid integrated circuit, determines an optimal load impedance and an optimal source impedance of a chip, provides a circuit diagram associated with the input, output and interstage matching networks, optimizes parameters, including a stability coefficient, an input and output standing wave system, a gain, a power, efficiency and harmonic suppression, and provides a layout for a monolithic microwave power amplifier.
Owner:成都泰格微电子研究所有限责任公司
A Second Harmonic Suppression Method of Broadband Helical Traveling Wave Tube
ActiveCN105304438BImprove overall tube performanceGood harmonic suppressionTravelling-wave tubesTransit-tube circuit elementsHarmonic mitigationHarmonic
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A frequency-reconfigurable antenna with dual-polarization and three-band frequency with reconfigurable harmonic suppression function
ActiveCN110858681BWide working frequency bandDoes not affect VSWRSimultaneous aerial operationsRadiating elements structural formsReconfigurable antennaAntenna polarization
The invention relates to a dual-polarized three-band frequency reconfigurable antenna with a reconfigurable harmonic suppression function, comprising an upper dielectric substrate and a lower dielectric substrate, a reconfigurable radiation unit for the upper antenna, and a reconfigurable radiation unit for the lower antenna , the upper layer reconfigurable filter structure, the lower layer reconfigurable filter structure, realize the reconfigurable frequency of the three frequency bands and the reconfigurable antenna polarization, and also realize the harmonic of each frequency band when the antenna works in different frequency bands The arrival of the wave is suppressed without affecting the normal work of other frequency bands.
Owner:XIDIAN UNIV
A te01 hybrid cavity filter device
ActiveCN104485497BImprove coupling coefficientSimple structureWaveguide type devicesFar distanceResonant cavity
The invention relates to a TE01 mixing cavity filter device and provides an implementation method for a TE01 dielectric resonator and coaxial metal resonator mixing cavity filter. According to a mixed structure which integrates the advantages, such as high Qvalue and stable temperature coefficient of TE01 dielectric resonators as well as relatively far distance between higher-order modes and main modes of coaxial metal resonators, the TE01 dielectric resonators and the coaxial metal resonators are arranged in a mutually crossed manner, the TE01 dielectric resonators are assembled on the side surface of a cavity body, and the space between each coaxial metal resonator and each TE01 dielectric resonator is changed by moving a tuning plate so as to realize the purpose of tuning the frequencies of the TE01 dielectric resonators. The TE01 mixing cavity filter device disclosed by the invention is applicable to metal resonant cavity devices, such as a metal resonant cavity filter, a duplexer and a combiner which can satisfy out-of-band rejection, but cannot realize insertion loss under a condition of limited volume, and can be applicable to devices, such as a TE01 dielectric resonant cavity filter, a duplexer and a combiner which can satisfy out-of-band rejection and insertion loss, but cannot meet a coupling coefficient required by larger relative bandwidth.
Owner:WUHAN HONGXIN TELECOMM TECH CO LTD
Capacitive-coupled bandpass filter
ActiveUS20200228085A1Good harmonic suppressionCompact formMultiple-port networksCapacitive couplingResonator
Examples of a capacitive-coupled bandpass filter include a plurality of coupling capacitors connected in series along a signal path extending between an input contact and an output contact, a first harmonic suppression notch circuit configured to provide a first harmonic suppression notch in a frequency response of the capacitive-coupled bandpass filter, and a second harmonic suppression notch circuit configured to provide a second harmonic suppression notch in the frequency response of the capacitive-coupled bandpass filter. The first harmonic suppression notch circuit includes a first pair of series L / C resonators connected in shunt between the signal path and a reference potential, and the second harmonic suppression notch circuit includes a second pair of series L / C resonators connected in shunt between the signal path and the reference potential.
Owner:SKYWORKS SOLUTIONS INC
Ultra-wideband microstrip filter
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Transceiving device with functions of power amplification and frequency hopping
InactiveCN101826886BFunctionalWith harmonic suppressionImpedence networksTransmissionHarmonicExcitation signal
The invention discloses a transceiving device with the functions of power amplification and frequency hopping, which comprises a low-power frequency-hopping filter, a primary power amplifier module, a high-power frequency-hopping filter, a final power amplifier module, a harmonic filter, a directional coupler and a self-checking switch which are sequentially connected with an excitation signal input end, wherein one end of the self-checking switch is connected with a load, and the other end is connected with a transceiving antenna through a transceiving switch. The transceiving device with the functions of power amplification and frequency hopping adopts modular component structure and has the advantages of compact structure, fast frequency-hopping speed, good selectivity, high output power, good harmonic suppression and the like.
Owner:GUANGDONG SHENGDA ELECTRONICS
Wide stopband reconfigurable filter power splitter based on sir and dgs structure
ActiveCN108493566BWith Broadband Group FeaturesExpand the use of frequency bandsCoupling devicesCommunications systemComputer science
Owner:XIDIAN UNIV
GaAs technology K wave band frequency converter structure chip
InactiveCN112928994ARealize frequency doubling functionGood power flatnessMulti-frequency-changing modulation transferenceLow noiseLocal oscillator signal
The invention provides a GaAs process K wave band frequency converter structure chip, the working frequency is 17.7 GHz-23.4 GH, the fundamental wave signal input frequency is 8.85 GHz-11.7 GHz, an input signal is amplified through a fundamental wave amplifier, the amplified signal drives a frequency doubler to work, the signal is subjected to secondary frequency doubling, and clutters are further filtered out through a filter. The frequency multiplication function from the X wave band to the K wave band is achieved, the output power of 16 dBm is achieved, the power flatness is good, and the harmonic suppression degree of each order is good and reaches 55 dBc. An amplified local oscillator signal is divided into two paths of signals with the phase difference of 90 degrees through a local oscillator I / Q bridge, the two paths of signals enter a frequency mixer and a double-balanced frequency mixer respectively to be mixed with an input intermediate frequency I signal and an input intermediate frequency Q signal respectively, the mixed signals enter a radio frequency I / Q bridge to be synthesized, mirror image signals are effectively suppressed, and the suppression degree reaches 50 dBc. The radio-frequency signal finally enters the low-noise radio-frequency amplifier, the output power is larger than 17 dBm, the noise is smaller than 10 dB, and 0.05 W radio-frequency power output is achieved.
Owner:HEFEI IC VALLEY MICROELECTRONICS CO LTD
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