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1. 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

…Vivialdi-element array achieves a fan beam at endfire from the board… …6.7 Nine simulated beams for the 4x4 array. At extreme steering angles, strong side lobes… …Simulated peak gain over steering angle for a narrow band signal. The 4x4 array has an additional… …6 dB of gain forward looking and a 3-dB steering range of 90◦ in simulation… …main lobe minus the largest side lobe’s gain at a given steering angle. They are more than 8… 

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APA (6th Edition):

Eck, J. A. (2014). Compact Antennas and Arrays for Unmanned Air Systems. (Masters Thesis). Brigham Young University. Retrieved from

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.

MLA Handbook (7th Edition):

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


Eck JA. Compact Antennas and Arrays for Unmanned Air Systems. [Internet] [Masters thesis]. Brigham Young University; 2014. [cited 2020 Dec 01]. Available from:

Council of Science Editors:

Eck JA. Compact Antennas and Arrays for Unmanned Air Systems. [Masters Thesis]. Brigham Young University; 2014. Available from: