Mix-Mode S Parameters Analysis of Crosstalk for Twisted Differential Line on PCB

2014 ◽  
Vol 644-650 ◽  
pp. 4237-4239
Author(s):  
Ya Lin Guan ◽  
Ling Ling Wang ◽  
Shu Hong Wu
Keyword(s):  
Microstrip Line ◽  
Differential Line ◽  
Full Wave ◽  
S Parameters ◽  
Parameters Analysis ◽  
Simulation Results

In this paper, twisted differential lines on multi-layer PCB is modeled with 3D Full-wave EM tool, and crosstalk is analyzed based on mix-mode S parameters. It is compared with traditional differential microstrip line. Then the simulation results demonstrate that twisted differential lines on multi-layer PCB can enhance immunity against crosstalk .

scholarly journals On The Study of Development of X Band Metamaterial Radar Absorber

2012 ◽  
Vol 1 (3) ◽  
pp. 94 ◽  
Author(s):  
M. A. Abdalla ◽  
Z. Hu
Keyword(s):  
Metamaterial Absorber ◽  
Theoretical Concepts ◽  
Centre Frequency ◽  
High Impedance ◽  
Full Wave ◽  
X Band ◽  
New Development ◽  
Simulation Results ◽  
Absorption Level ◽  
High Absorption

A new development of metamaterial applications in radar absorbers for X band is introduced. Two modifications were suggested based on two different approaches which are a new called fan shaped resonator absorber and a modified high impedance metamaterial absorber. Both approaches introduce thin radar absorber (5.3% at centre frequency) with wide bandwidth and high absorption level. The theoretical concepts of each design are explained and validated using full wave simulation. Results illustrate that the new development can achieve wider bandwidth, multiple operating bands; the increase in bandwidth is up to 8 times the conventional one. Moreover, the reported absorbers have capability to operate with different polarizations.

S-parameters analysis of waveguide bend with metamaterial

2015 ◽  
Author(s):  
Diego L. Pinheiro ◽  
Rose M. S. Batalha ◽  
Kassiane S. Medeiros ◽  
Frederico M.Q. Severgnini ◽  
Elson J. Silva
Keyword(s):  
S Parameters ◽  
Parameters Analysis ◽  
Waveguide Bend

Compact filtering power dividers with wide upper stopband

2019 ◽  
Vol 11 (08) ◽  
pp. 765-773
Author(s):  
Gaoya Dong ◽  
Weimin Wang ◽  
Yuanan Liu
Keyword(s):  
Transmission Lines ◽  
Wave Transmission ◽  
Coupling Matrix ◽  
Power Dividers ◽  
Full Wave ◽  
Half Wave ◽  
Coupled Lines ◽  
Quarter Wave ◽  
Simulation Results ◽  
Good Agreement

AbstractA series of compact filtering power dividers (FPDs) with simple layouts are proposed based on coupling topology. The structure of the presented FPD1 is composed of three resonators and one isolating resistor. These FPDs can be designed based on coupling matrix filter theory. A half-wave transmission line is employed in FPD2 to introduce a transmission zero (TZ) locating at 1.27f0. The FPD3 is designed by replacing quarter-wave transmission lines in FPD2 with quarter-wave coupled lines, which will produce a TZ locating at 1.96 f0 and extend upper stopband bandwidth. For verification, three FPDs centered at 2.45 GHz are fabricated and measured. All measured results are in good agreement with the full-wave simulation results.

Design of multi-layered bandpass filter with independently controllable triple-passband response

2014 ◽  
Vol 6 (6) ◽  
pp. 611-618 ◽  
Author(s):  
Yung-Wei Chen ◽  
Hung-Wei Wu ◽  
Yan-Kuin Su
Keyword(s):  
Frequency Response ◽  
Bandpass Filter ◽  
Bottom Layer ◽  
Wide Frequency Range ◽  
Electromagnetic Simulation ◽  
Frequency Range ◽  
High Isolation ◽  
Full Wave ◽  
Simulation Results ◽  
Good Agreement

In this paper, a new multi-layered triple-passband bandpass filter using embedded and stub-loaded stepped impedance resonators (SIRs) is proposed. The filter is designed to have triple-passband at 1.8, 2.4, and 3.5 GHz. The 1st and 2nd passbands (1.8/2.4 GHz) are simultaneously generated by controlling the impedance and length ratios of the embedded SIRs (on top layer). The 3rd passband (3.5 GHz) is generated by using the stub-loaded SIR (on bottom layer). Using the embedded SIR, the even modes can be tuned within very wide frequency range and without affecting the odd modes. Therefore, the design of multi-band filters with very close passbands can be easily achieved and having a high isolation between the passbands. The filter can provide the multi-path propagation to enhance the frequency response and achieving the compact circuit size. The measured results are in good agreement with the full-wave electromagnetic simulation results.

A Novel Small-Size Coupled-Line Wilkinson Power Divider for Dual-Band Applications

2013 ◽  
Vol 437 ◽  
pp. 1066-1072 ◽  
Author(s):  
Wei Min Wang ◽  
Yuan An Liu
Keyword(s):  
Design Theory ◽  
Power Divider ◽  
Dual Band ◽  
Coupled Line ◽  
Power Dividers ◽  
Full Wave ◽  
Coupled Lines ◽  
Parameters Analysis ◽  
Wilkinson Power Dividers ◽  
Circuit Configuration

A novel coupled-line circuit configuration is proposed to design small-size dual-band Wilkinson power dividers. This proposed power divider consists of three sections of coupled lines and two isolation resistors. The analytical design theory is given and the electrical parameters analysis is provided. Six numerical examples are presented to demonstrate the flexible dual-band applications. To avoid a negative isolation resistor, a practical power divider operating at 1GHz and 2.2GHz with two positive-value resistors is designed. The calculated and full-wave simulated results verify our proposed idea. Keywords: Coupled-line, dual-band, power divider.

Millimeter Wave Characterization of Wire Bond Transitions for W-Band Electromagnetic Sensor

2015 ◽  
Vol 738-739 ◽  
pp. 103-106
Author(s):  
Yong Fang ◽  
Bao Qing Zeng ◽  
Wen Tao Zhang ◽  
Pu Wang
Keyword(s):  
Equivalent Circuit ◽  
Millimeter Wave ◽  
Equivalent Circuit Model ◽  
Single Wire ◽  
Full Wave ◽  
Wire Bond ◽  
W Band ◽  
Electromagnetic Sensor ◽  
Simulation Results ◽  
Lumped Equivalent Circuit

This paper presents millimeter wave characterization and models of various wire bond transitions between chip’s ground-signal-ground pad (GSG) and microstrip (MS), include single-wire-nomatch MS-GSG transition, double-wire-nomatch MS-GSG, single-wire-match MS-GSG transition, and double-wire-match MS-GSG transition. It also presents the 3D full-wave electromagnetic simulation. Analysis results show that the double-wire-match MS-GSG transition’s characteristic is better than other three transitions in the whole W band. The accurate extracted parameter values are used for the lumped equivalent circuit model, whose simulation results are good with the full wave simulation results. The error between lumped equivalent circuit and full-wave models is of the order of ±0.2dB for S11 and S21 in the frequency range 75 - 105GHz. The proposed lumped equivalent circuit is suitable to be implemented in commercial microwave CAD tools for the electromagnetic sensor designing.

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