A5006079572- Radio Frequency Integrated Circuit Design
- Advanced Power Amplifier Design
- Microwave Engineering and Waveguides
- GaN-based semiconductor devices and materials
- Full-Duplex Wireless Communications
- Analog and Mixed-Signal Circuit Design
- Advancements in Semiconductor Devices and Circuit Design
- Advanced DC-DC Converters
- Auditing, Earnings Management, Governance
- Millimeter-Wave Propagation and Modeling
- PAPR reduction in OFDM
- Quantum Chromodynamics and Particle Interactions
- Corporate Finance and Governance
- Corruption and Economic Development
- Energy, Environment, Economic Growth
- Advanced Battery Materials and Technologies
- Advanced battery technologies research
- Advanced Fiber Optic Sensors
- Global Financial Crisis and Policies
- Wireless Power Transfer Systems
- Advanced Adaptive Filtering Techniques
- Advancements in PLL and VCO Technologies
- Photonic and Optical Devices
- Cosmology and Gravitation Theories
- Electromagnetic Compatibility and Noise Suppression
University of Electronic Science and Technology of China
2020-2025
Shanghai Lixin University of Accounting and Finance
2024
Hubei University
2023-2024
Taiyuan University of Technology
2023
Wuhan Business University
2023
Changchun University of Science and Technology
2022
This letter proposes a design method for reflective analog predistorter based on asymmetric loadings of hybrid bridge. The amplitude and phase characteristics the by tuning two can be intuitively presented Smith chart. By using method, load impedance branches visually selected chart to decouple gain predistorter. To validate is designed fabricated at 3.4 GHz. measurement results indicate that range AM-AM over 2.4 dB, AM-PM less than 0.8°. A power amplifier (PA) with 20 MHz 64-QAM signal...
This brief presents a design method of analog predistorter (APD) for Doherty power amplifiers (DPAs) based on minimum gain and phase deviation to improve the output adjacent channel leakage (ACLR). To prove this method, normalized is fomulated non-linear analysis DPAs' phase, which new joint indicator between DPAs APDs. Then an APD linearisation performance prediction platform constructed using as core. An consisting two T-networks in series designed example existing DPA. It has low circuit...
This brief presents a 30–36 GHz CMOS power amplifier (PA) with diode-connected analog linearizer dedicated to improving the output and power-added efficiency (PAE) at 1-dB compression point (OP1dB). The proposed performs gain expansion, simultaneously introducing little phase distortion. In addition, design procedure of matching network between PA is analyzed mitigate impact impedance variation caused by control voltage input power. As proof concept, circuit fabricated in 65-nm process 0.31...
In this letter, the design of a <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$C$ </tex-math></inline-formula> -band high-efficiency power amplifier (PA) with compact harmonic control network (HCN) is presented. Based on device model, optimal fundamental and second load impedance was obtained by load-pull simulation. Then simply matching (FMN) realized using simplified real frequency technique (SRFT). To...
This letter uses a deembedded technique to extract the equivalent parasitic network of transistor CGHV27015S. Through obtained network, theoretical impedance space continuous class-F mode is mapped package plane, which simplifies design Doherty power amplifier (DPA). At same time, postmatching and bias are used tune harmonics, improve overall efficiency DPA. The DPA delivers saturation output ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Transition-metal high-entropy oxides (HEOs) show superior electrochemical properties and excellent long-term cycling stability in secondary batteries due to their entropy stabilization effect. However, the effects on storage mechanisms of Na+ remains an open question, especially considering its larger ionic radius, sluggish kinetics movement, serious volumetric expansion. In this work, ultra-small size spinel-structured (FeCuCrMnNi)3O4 composition hollow porous microspheres is dispersed rGO...
This letter presents a fully integrated dual power mode Doherty amplifier (PA) in the Nanjing Electronic Devices Institute (NEDI) 250-nm GaN process. Due to advantages of high (HP) and gain, cascode architecture is introduced both carrier peaking PAs. To author's best knowledge, this first time applied process for sub-6 GHz PA design. The equivalent parasitic network interstage impedance matching transistors are constructed extracted within frequency range 1–15 GHz. High efficiency...
A 2×9-bit multiphase (MP) Class-G switched capacitor power amplifier (SCPA) prototype in a 65-nm CMOS with enhanced efficiency is proposed for digital intensive transmitters. In order to improve the peak output power, two independent cells are employed rather than shared cell, and driven by discrete fixed phases but not limited adjacent phases. The determined resolution of vector. operation introduced within 6 dB back-off region. simulated MP SCPA 27.17 dBm, system 41.73% 23.72%. Under...
In this letter, we present an adaptive method for linearizing radio frequency (RF) power amplifier (PA). The input and output error is segmented in light of the signal magnitude to improve convergence speed linearizer's parameter optimization. feedback bandwidth sampling rate loop are only 1/8 with proposed method. Experimental results show that eight times faster than conventional method, adjacent channel ratio (ACPR) improved from −35.18 −46.91 dB.
We used the Cartan formalism to construct fermionic models that are compatible with Galilean or Carrollian symmetry and rigid scaling symmetry. The free fermion model exhibits conformal which is isomorphic asymptotic symmetries for flat spacetime in three dimensions, namely BMS$_3$ performed canonical quantization this BMS model, discussed both highest weight vacuum induced vacuum, calculated correlation functions torus partition function. Finally we constructed $\mathcal N=2$ supersymmetric...
Ultrafast imaging simultaneously pursuing high temporal and spatial resolution is a key technique to study the dynamics in microscopic world. However, broadband spectra of ultra-short pulses bring major challenge traditional coherent diffraction (CDI), as they result an indistinct pattern, thereby complicating image reconstruction. To address this, we introduce, our knowledge, new ultra-broadband method, empirically demonstrate its efficacy facilitating high-resolution rapid reconstruction...
Environmental regulation is an important tool for achieving environmental protection. This study investigated how climate change affects firms' actions to reduce pollutant emissions through regulations. We conducted a pooled OLS regression analysis using data from Chinese industrial firms that were above the designated size 2006 2013. The results showed SO 2 in response change, particularly when regulations are more stringent. However, prefer productivity and implement “end-of-pipe”...
This letter proposes a general design method for linear Doherty power amplifier (DPA). With this method, the expanded or compressed amplitude-to-amplitude (AM-AM) and amplitude-to-phase (AM-PM) distortions of carrier (PA) can be canceled at different back-off complex load impedance. In design, DPA is designed 3.0–3.5 GHz prototype characterization. The measurement results show that gain compression phase variation are controlled within 1.3 dB 5.5°, respectively. Applying 100 MHz 64-QAM...
This letter presents a low-power analog error-based statistical module for characterizing the nonlinear distortions of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$Ka$ </tex-math></inline-formula> -band power amplifiers (PAs) based on TSMC 65-nm CMOS process. A dual-path nonlinear-characterizing subtractor with peak detectors and an integration-time controllable integrator are configured to maintain...
This paper intensely studies the impact of input nonlinearity caused by transistor's feedback on hybrid continuous class-F power amplifier. The research extends influence harmonics amplifiers to a more general form. Through waveform engineering, is analyzed. By analyzing change in cutoff angle nonlinearity, drain voltage and current waveforms amplifier can be obtained. new obtained from analysis redefine design space source impedance load for designing corresponding output matching network,...