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You searched for subject:(digital beam steering). Showing records 1 – 2 of 2 total matches.

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Louisiana State University

1. Hebert, Daniel James. High capacity digital beam steering technology.

Degree: PhD, Electrical and Computer Engineering, 2013, Louisiana State University

A novel method is described in detail for steering light in many directions without moving mechanical parts. The method involves a combination of liquid crystal cells and polarizing beam splitters. The polarization at each beam splitter is controlled by applying a signal to its corresponding liquid crystal cell. A study of light steering techniques is described for efficient beam placement, in a line and plane. These techniques permit accurate, non-mechanical, beam steering limited by the response time of the liquid crystal cells. A theoretical limit to the number of discrete directions is described and closely approached for a one dimensional system.

Subjects/Keywords: digital beam scanning; non-mechanical laser steering; optics

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APA (6th Edition):

Hebert, D. J. (2013). High capacity digital beam steering technology. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-05202013-101814 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1824

Chicago Manual of Style (16th Edition):

Hebert, Daniel James. “High capacity digital beam steering technology.” 2013. Doctoral Dissertation, Louisiana State University. Accessed December 01, 2020. etd-05202013-101814 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1824.

MLA Handbook (7th Edition):

Hebert, Daniel James. “High capacity digital beam steering technology.” 2013. Web. 01 Dec 2020.

Vancouver:

Hebert DJ. High capacity digital beam steering technology. [Internet] [Doctoral dissertation]. Louisiana State University; 2013. [cited 2020 Dec 01]. Available from: etd-05202013-101814 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1824.

Council of Science Editors:

Hebert DJ. High capacity digital beam steering technology. [Doctoral Dissertation]. Louisiana State University; 2013. Available from: etd-05202013-101814 ; https://digitalcommons.lsu.edu/gradschool_dissertations/1824

2. Eck, James Arthur. Compact Antennas and Arrays for Unmanned Air Systems.

Degree: MS, 2014, Brigham Young University

A simple and novel dual-CP printed antenna is modelled and measured. The patch antennais small and achieves a low axial ratio without quadrature feeding. The measured pattern showsaxial ratio pattern squinting over frequency. Possible methods of improving the individual element are discussed, as well as an array technique for improving the axial ratio bandwidth. Three endfire printed antenna structures are designed, analyzed, and compared. The comparison includes an analysis of costs of production for the antenna structures in addition to their performance parameters. This analysis concludes that cost of materials primarily reduces the size of antennas for a given gain and bandwidth. An antenna stucture with an annular beam pattern for down-looking navigational radar is proposed. The antenna uses sub-wavelength grating techniques from optics to achieve a highly directive planar reflector which is used as a ground plane for a monopole. A fan-beam array element is fabricated for use in a digitally steered receive array for obstacle avoidance radar. The steered beam pattern is observed. The element-dependent phase shifts for a homodyned signal in particular are explored as to their impact on beam steering.

Subjects/Keywords: unmanned air vehicles; unmanned air systems; dual circularly polarized antennas; printed circuit board antennas; planar antennas; digital beam steering; antenna arrays; sub-wavelength; grating; electromagnetic orientation; sense-and-avoid radar; Electrical and Computer Engineering

…The phase terms needed for digital beam steering in a homodyne signal radar are derived… …While digital beam steering is a well understood technique, homodyning presents new phase… …Chapter 6: Digital Beam Steering, presents digital array processing for multiple-target tracking… …side, this steering can be done in post-processing using digital beam steering to form… …to the radar because as the beam is steered the target remains in the beam over a steering… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Eck, J. A. (2014). Compact Antennas and Arrays for Unmanned Air Systems. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=5296&context=etd

Chicago Manual of Style (16th Edition):

Eck, James Arthur. “Compact Antennas and Arrays for Unmanned Air Systems.” 2014. Masters Thesis, Brigham Young University. Accessed December 01, 2020. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=5296&context=etd.

MLA Handbook (7th Edition):

Eck, James Arthur. “Compact Antennas and Arrays for Unmanned Air Systems.” 2014. Web. 01 Dec 2020.

Vancouver:

Eck JA. Compact Antennas and Arrays for Unmanned Air Systems. [Internet] [Masters thesis]. Brigham Young University; 2014. [cited 2020 Dec 01]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=5296&context=etd.

Council of Science Editors:

Eck JA. Compact Antennas and Arrays for Unmanned Air Systems. [Masters Thesis]. Brigham Young University; 2014. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=5296&context=etd

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