Near Field Sonic Boom Test on Two Low-Boom Configurations Using Multiple Measurement Techniques at NASA Ames (Invited)

Author(s):  
Donald Durston ◽  
Susan Cliff ◽  
Thomas Wayman ◽  
Jason Merret ◽  
Alaa Elmiligui ◽  
...  
Author(s):  
Michael A. Park ◽  
Richard L. Campbell ◽  
Alaa A. Elmiligui ◽  
Susan E. Cliff ◽  
Sudheer Nayani

2009 ◽  
Vol 7 ◽  
pp. 17-22 ◽  
Author(s):  
C. H. Schmidt ◽  
T. F. Eibert

Abstract. The radiation of large antennas and those operating at low frequencies can be determined efficiently by near-field measurement techniques and a subsequent near-field far-field transformation. Various approaches and algorithms have been researched but for electrically large antennas and irregular measurement contours advanced algorithms with low computation complexity are required. In this paper an algorithm employing plane waves as equivalent sources and utilising efficient diagonal translation operators is presented. The efficiency is further enhanced using simple far-field translations in combination with the expensive near-field translations. In this way a low complexity near-field transformation is achieved, which works for arbitrary sample point distributions and incorporates a full probe correction without increasing the complexity.


2019 ◽  
Author(s):  
Jeffrey A. Housman ◽  
Gaetan K. Kenway ◽  
James C. Jensen ◽  
Cetin C. Kiris

2019 ◽  
Author(s):  
P. A. Mishchenko ◽  
T. A. Kiseleva

1993 ◽  
Vol 30 (6) ◽  
pp. 911-917 ◽  
Author(s):  
M. J. Siclari ◽  
C. M. Darden
Keyword(s):  

1993 ◽  
Vol 41 (477) ◽  
pp. 584-589 ◽  
Author(s):  
Akihiko YOSHIDA ◽  
Kazuhiro NAKAHASHI ◽  
Shoichi FUJII
Keyword(s):  

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 841
Author(s):  
Fengyu Yin ◽  
Jin Liu ◽  
Haima Yang ◽  
Aleksey Kudreyko ◽  
Bo Huang

Surface Plasma resonance (SPR) sensors combined with biological receptors are widely used in biosensors. Due to limitations of measurement techniques, small-scale, low accuracy, and sensitivity to the refractive index of solution in traditional SPR prism sensor arise. As a consequence, it is difficult to launch commercial production of SPR sensors. The theory of localized surface plasmon resonance (LSPR) developed based on SPR theory has stronger coupling ability to near-field photons. Based on the LSPR sensing theory, we propose a submicron-sized golden-disk and graphene composite structure. By varying the thickness and diameter of the array disk, the performance of the LSPR sensor can be optimized. A graphene layer sandwiched between the golden-disk and the silver film can prevent the latter from oxidizing. Symmetrical design enables high-low concentration of dual-channel distributed sensing. As the fixed light source, we use a 632.8-nm laser. A golden nano-disk with 45 nm thickness and 70 nm radius is designed, using a finite difference time domain (FDTD) simulation system. When the incident angle is 42°, the figure of merit (FOM) reaches 8826, and the measurable refractive index range reaches 0.2317.


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