Techniques for Digital Array Radar Planar Near-Field Calibration by Retrofit of an Analog System

2021 ◽  
Author(s):  
Thomas G. Williamson ◽  
Jason Whelan ◽  
Walter Disharoon ◽  
Paul Simmons ◽  
Jacob Houck ◽  
...  
Keyword(s):  
Near Field ◽  
Field Calibration ◽  
Analog System

Near-Field Calibration of Isolated Carbon Nanotube Field Emitters for Nanomanufacturing Applications

2004 ◽  
Author(s):  
King-Fu Hii ◽  
R. Ryan Vallance ◽  
Padmakar D. Kichambare ◽  
M. Pinar Mengu¨c¸
Keyword(s):  
Carbon Nanotube ◽  
Enhancement Factor ◽  
Near Field ◽  
Field Enhancement ◽  
Field Enhancement Factor ◽  
Strong Function ◽  
Field Calibration ◽  
Turn On ◽  
Field Emitters ◽  
Precise Knowledge

This paper reports the development of an apparatus, technique, and method for calibrating the field emission phenomena’s dependence on both the voltage applied between the anode and cathode and the electrodes gap. A precise knowledge of the electrodes gap is required for calibrating field emitters. The I-V characteristic of isolated carbon nanotube field emitter is a strong function of the electrodes gap distance. A consolidated IV curve is obtained by calculating the current density and the local electric field with the field enhancement factor taken into consideration. The field enhancement factor and emitting area are unique for each electrodes gap distance. We also found that the turn-on voltage decreases as the electrodes gap distance decreases.

Fabrication of near‐field calibration arrays

1990 ◽  
Vol 88 (S1) ◽  
pp. S7-S7
Author(s):  
Allan C. Tims ◽  
Allan M. Young ◽  
Alan D. McCleary
Keyword(s):  
Near Field ◽  
Field Calibration
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