Dual‐Band Impedance Transformer Using Four‐Section With a Wide and Flexible Frequency Ratio
Sign Up to like & getrecommendations! Published in 2025 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.70309
Abstract: In this paper, a dual‐band RF rectifier with flexible frequency ratios is presented. To achieve this flexibility, a four‐section transformer is proposed that covers a wide range of the Smith chart impedance, including the region… read more here.
Keywords: dual band; flexible frequency; impedance; band ... See more keywords
Application of four-section approach for prenatal diagnosis of Pierre robin sequence
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Medical Ultrasonics (2001)"
DOI: 10.1007/s10396-025-01556-x
Abstract: This study aimed to evaluate the effectiveness of the four-section approach using two-dimensional sonography in diagnosing Pierre Robin sequence (PRS) during second-trimester screening. A prospective study was conducted on low-risk pregnant women undergoing routine mid-trimester… read more here.
Keywords: pierre robin; robin sequence; section; four section ... See more keywords
Quarter-Wavelength and Open-End Half-Wavelength Four-Section Coaxial Stepped Impedance Resonators for High-Power Space Bandpass Filters
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DOI: 10.1109/tmtt.2023.3338531
Abstract: This article focuses on the comparison of quarter-wavelength and open-end half-wavelength four-section coaxial stepped impedance resonators (SIRs) for the design of Tx bandpass filters with high multipactor thresholds. To obtain a half-wavelength configuration with open… read more here.
Keywords: wavelength four; half wavelength; section; four section ... See more keywords