Results 241 to 250 of about 36,924 (279)
Some of the next articles are maybe not open access.
A Broadband 3 dB Directional Coupler With Ultra-Low Amplitude Imbalance
2021 14th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT), 2021This paper presents a broadband 3 dB directional coupler based on a multi-branch hybrid waveguide. By placing a two-stage stepped waveguide-height discontinuity in the middle of the coupler symmetrically, a controllable ripple is introduced to achieve better overall amplitude imbalance.
Bo Zhang
exaly +2 more sources
A Synchrophasor Estimation of Power Systems Considering Three-phase Amplitude Imbalance
2020 IEEE Sustainable Power and Energy Conference (iSPEC), 2020When the distribution network occurs fault or the three-phase load is unbalanced, the measurement accuracy of the phasor measurement unit (PMU) will decrease due to the influence of the unbalanced current/voltage signal. Accordingly, a synchrophasor measurement algorithm considering three-phase amplitude imbalance is proposed to improve the estimation ...
Ling Fu, Siyu Xiong
exaly +2 more sources
Journal of the Physical Society of Japan, 2009
We study charge imbalance transport in a superconducting wire with focus on the influence of spatial variation of pair potential amplitude Δ. Assuming that a superconducting wire is coupled to two normal-metal electrodes via tunnel junctions, we consider the case in which charge imbalance is created at one junction and the resulting excess tunneling ...
Yositake Takane
exaly +2 more sources
We study charge imbalance transport in a superconducting wire with focus on the influence of spatial variation of pair potential amplitude Δ. Assuming that a superconducting wire is coupled to two normal-metal electrodes via tunnel junctions, we consider the case in which charge imbalance is created at one junction and the resulting excess tunneling ...
Yositake Takane
exaly +2 more sources
A Novel Ultrawideband Branch Waveguide Coupler With Low Amplitude Imbalance
IEEE Transactions on Microwave Theory and Techniques, 2022Bingli Dai, Bo Zhang, Zhongqian Niu
exaly +2 more sources
Compact Six-Port Out-of-Phase Power Divider With Reduced Amplitude Imbalance
2022 Asia-Pacific Microwave Conference (APMC), 2022Makoto Sano
exaly +2 more sources
The Design of 220 GHz Broadband Waveguide Hybrid Coupler With Low Amplitude Imbalance
2021 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2021Bo Zhang
exaly +2 more sources
Calibrating the Amplitude and Phase Imbalances in AgileDARN HF Radar
Radio Science, 2021AbstractThe Agile Dual Auroral Radar Network (AgileDARN) radar has been developed as an all‐digital high‐frequency (HF) coherent scatter radar. Based on phased array antenna and digital signal processing techniques, digital beam forming (DBF) is employed for both transmission and reception, which steers toward the desired direction based on the ...
X. Deng +6 more
openaire +1 more source
A Design of an Equal Hybrid Coupler with Low Amplitude Imbalance and Tunable Phase-Difference
2023 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2023Jiachen Wu, Wen Jiang
exaly +2 more sources
Deriving Effects of IQ-Imbalance on Phase-and Amplitude Noise in Radars
2024 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)The combined effects of local oscillator (LO) phase noise (PN), in-phase / quadrature imbalance (IQI), and range correlation are studied in this paper. We show how PN from an LO appears as PN and amplitude noise (AN) in the received signal of a coherent ...
Edgar Jirousek +2 more
openaire +2 more sources
Compensation for phase and amplitude imbalance in quadrature Doppler signals
Ultrasound in Medicine & Biology, 1996Quadrature phase detection is widely used in ultrasound Doppler systems to obtain directional information about flow velocities in blood vessels. The presence of phase and/or gain imbalance between the quadrature outputs produces crosstalk between the forward and reverse channels which may introduce errors into mean and maximum velocity estimates and ...
Moraes, R, Evans, DH
openaire +3 more sources