scholarly journals In-Phase T-Junction: Study and Application to Gysel Power Dividers for High Power-Division Ratios Requiring No High-Impedance Transmission-Line Section

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 18146-18154 ◽  
Author(s):  
Hee-Ran Ahn ◽  
Manos M. Tentzeris
Keyword(s):  
Transmission Line ◽  
High Power ◽  
Power Dividers ◽  
High Impedance ◽  
Line Section

scholarly journals Highly Sensitive Reflective-Mode Defect Detectors and Dielectric Constant Sensors Based on Open-Ended Stepped-Impedance Transmission Lines

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6236
Author(s):  
Pau Casacuberta ◽  
Jonathan Muñoz-Enano ◽  
Paris Vélez ◽  
Lijuan Su ◽  
Marta Gil ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Transmission Line ◽  
Transmission Lines ◽  
Characteristic Impedance ◽  
Reference Sample ◽  
Phase Variation ◽  
Dielectric Constants ◽  
High Impedance ◽  
Line Section ◽  
Highly Sensitive

In this paper, reflective-mode phase-variation sensors based on open-ended stepped-impedance transmission lines with optimized sensitivity for their use as defect detectors and dielectric constant sensors are reported. The sensitive part of the sensors consists of either a 90° high-impedance or a 180° low-impedance open-ended sensing line. To optimize the sensitivity, such a sensing line is cascaded to a 90° transmission line section with either low or high characteristic impedance, resulting in a stepped-impedance transmission line configuration. For validation purposes, two different sensors are designed and fabricated. One of the sensors is implemented by means of a 90° high impedance (85 Ω) open-ended sensing line cascaded to a 90° low impedance (15 Ω) transmission line section. The other sensor consists of a 180° 15-Ω open-ended sensing line cascaded to a 90° 85-Ω line. Sensitivity optimization for the measurement of dielectric constants in the vicinity of that corresponding to the Rogers RO4003C substrate (i.e., with dielectric constant 3.55) is carried out. The functionality as a defect detector is demonstrated by measuring the phase-variation in samples consisting of the uncoated Rogers RO4003C substrate (the reference sample) with arrays of holes of different densities.

Short Length High-Power Water Filled Coaxial Transmission Line for Long Pulses

2018 ◽  
Author(s):  
Artem Kuskov ◽  
Joe Chen ◽  
Maxwell Lerma ◽  
Thomas Schmidt ◽  
Salvador Portillo
Keyword(s):  
Transmission Line ◽  
High Power ◽  
Short Length

Design for high power and low impedance triplate transmission line

2010 ◽  
Vol 22 (3) ◽  
pp. 519-523
Author(s):  
关永超 Guan Yongchao ◽  
王勐 Wang Meng ◽  
丰树平 Feng Shuping ◽  
曹文斌 Cao Wenbin
Keyword(s):  
Transmission Line ◽  
High Power
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