scholarly journals Transmon in a semi-infinite high-impedance transmission line: Appearance of cavity modes and Rabi oscillations

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
E. Wiegand ◽  
B. Rousseaux ◽  
G. Johansson
Keyword(s):  
Transmission Line ◽  
Rabi Oscillations ◽  
High Impedance ◽  
Cavity Modes

A microstrip planar lowpass filter with ultra-wide stopband using hexagonal-shaped resonators

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shu Jiang ◽  
Wenbo Wang ◽  
Le Ren
Keyword(s):  
Transmission Line ◽  
Harmonic Suppression ◽  
Lowpass Filter ◽  
Functional Area ◽  
Pass Filter ◽  
Low Pass Filter ◽  
High Impedance ◽  
Low Pass ◽  
Multiple Transmission

Abstract A microstrip planar lowpass filter with ultra-wide stopband up to 40 GHz is presented. The filter is designed based on four types of hexagonal-shaped resonators, producing multiple transmission zeroes and extending the stopband. The high-impedance transmission line is folded to make the circuit more compact and form the coupling gaps between the adjacent resonators. A pair of folded open stubs are added to enhance the cut-off rate. As a result, an ultra-wide stopband with 23rd-harmonic suppression has been attained. A demonstration filter has been designed and fabricated with 3 dB cut-off frequency of 1.70 GHz. The measured results show that the relative stop bandwidth of the low-pass filter (LPF) is 182% with suppression level of 25 dB, covering 1.85–40 GHz. The functional area size of the filter is 21.50 × 21.70 mm, which corresponds to 0.198λ g  × 0.200λ g (λ g is the guided wavelength at 3 dB cut-off frequency).

scholarly journals Analytical Model for High Impedance Fault Analysis in Transmission Lines

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
S. Maximov ◽  
V. Torres ◽  
H. F. Ruiz ◽  
J. L. Guardado
Keyword(s):  
Transmission Line ◽  
Analytical Model ◽  
Transmission Lines ◽  
Fire Hazard ◽  
Human Life ◽  
Electric Arc ◽  
Fault Analysis ◽  
Arc Model ◽  
High Impedance ◽  
High Impedance Fault

A high impedance fault (HIF) normally occurs when an overhead power line physically breaks and falls to the ground. Such faults are difficult to detect because they often draw small currents which cannot be detected by conventional overcurrent protection. Furthermore, an electric arc accompanies HIFs, resulting in fire hazard, damage to electrical devices, and risk with human life. This paper presents an analytical model to analyze the interaction between the electric arc associated to HIFs and a transmission line. A joint analytical solution to the wave equation for a transmission line and a nonlinear equation for the arc model is presented. The analytical model is validated by means of comparisons between measured and calculated results. Several cases of study are presented which support the foundation and accuracy of the proposed model.

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