A Quantitative Postweld Shift Measurement and Compensation Technique in Butterfly Laser Module Packages

2008 ◽  
Vol 47 (9) ◽  
pp. 7166-7172
Author(s):  
Yi-Cheng Hsu ◽  
Ying-Chien Tsai ◽  
Jao-Hwa Kuang ◽  
Yu-Sin Hung ◽  
Wood-Hi Cheng
Keyword(s):  
Shift Measurement ◽  
Compensation Technique ◽  
Laser Module

A novel fiber alignment shift measurement and correction technique in laser-welded laser module packaging

2005 ◽  
Vol 23 (2) ◽  
pp. 486-494 ◽  
Author(s):  
Yi-Cheng Hsu ◽  
Ying-Chien Tsai ◽  
Yeh-Lin Ho ◽  
Maw-Tyan Sheen ◽  
Jao-Hwa Kuang ◽  
...  
Keyword(s):  
Shift Measurement ◽  
Fiber Alignment ◽  
Correction Technique ◽  
Laser Module

A Notch-Saddle-Compensation Technique in Butterfly-Type Laser Module Packages

2007 ◽  
Vol 25 (6) ◽  
pp. 1594-1601 ◽  
Author(s):  
Yi-Cheng Hsu ◽  
Ying-Chien Tsai ◽  
Jao-Hwa Kuang ◽  
Maw-Tyan Sheen ◽  
Pu-Hsien Hsu ◽  
...  
Keyword(s):  
Compensation Technique ◽  
Laser Module

Influence of the Aperture Edge Diffraction Effects on the Mutual Coupling Compensation Technique in Small Planar Antenna Arrays

2011 ◽  
Vol 57 (1) ◽  
pp. 115-120 ◽  
Author(s):  
Mariusz Zamłyński ◽  
Piotr Słobodzian
Keyword(s):  
Antenna Arrays ◽  
Mutual Coupling ◽  
Planar Antenna ◽  
Sidelobe Level ◽  
Edge Diffraction ◽  
Narrow Angle ◽  
Compensation Technique ◽  
Diffraction Effects ◽  
Linear Antenna Arrays

Influence of the Aperture Edge Diffraction Effects on the Mutual Coupling Compensation Technique in Small Planar Antenna Arrays In this paper the quality of a technique to compensate for mutual coupling (and other phenomena) in small linear antenna arrays is investigated. The technique consists in calculation of a coupling matrix, which is than used to determine corrected antenna array excitation coefficients. Although the technique is known for more than 20 years, there is still very little information about how different phenomena existing in a real antenna arrays influence its performance. In this paper two models of antenna arrays are used. In the first model the effect of mutual coupling is separated from the aperture edge diffraction. In the second model antenna both mutual coupling and aperture edge diffraction effects are included. It is shown that mutual coupling itself can be compensated very well and an ultralow sidelobe level (i.e. -50 dB) could be achieved in practice. In the presence of diffraction effects -46.3 dB sidelobe level has been attained, but radiation pattern can be controled only in narrow angle range (i.e. up to ±60°).

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