The fresnel zone field beam waveguide system

2005 ◽  
Author(s):  
H. Lai ◽  
R. Rudolph ◽  
L. Bryans ◽  
A. Smoll
Keyword(s):  
Fresnel Zone ◽  
Waveguide System ◽  
Beam Waveguide ◽  
Zone Field

scholarly journals A Microwave Holographic Procedure for Large Symmetric Reflector Antennas Using a Fresnel-Zone Field Data Processing

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Giuseppe Mazzarella ◽  
Giorgio Montisci ◽  
Giampaolo Serra
Keyword(s):  
Fresnel Zone ◽  
Near Field ◽  
Field Pattern ◽  
Reflector Antennas ◽  
Decomposition Approach ◽  
Reflector Surface ◽  
Robustness To Noise ◽  
Zone Field ◽  
Value Decomposition ◽  
Direct Use

In this paper we propose a new holographic procedure for the diagnostic of large reflector antennas, based on the direct use of the Fresnel-field pattern. The relation leading from the Fresnel field to the current on the reflector surface is formulated in the least-squares sense as a discrete data inverse problem and then regularized by using a singular value decomposition approach. A detailed theoretical analysis of the problem and full assessment of the presented technique are provided. Simulations are carried out by using the radiative near-field pattern generated with a commercial software. Results show good accuracy and robustness to noise for the retrieval of the panel-to-panel misalignment of a reflector antenna.

scholarly journals Design of Corrective Beam Waveguide System for the ALMA/ACA 7-m Antenna

2009 ◽  
Vol 61 (5) ◽  
pp. 1065-1080
Author(s):  
Masahiro Sugimoto ◽  
Matthew Carter ◽  
Junji Inatani ◽  
Yutaro Sekimoto ◽  
Satoru Iguchi
Keyword(s):  
Waveguide System ◽  
Beam Waveguide
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