NDLI: Fixed-beam L-band array for space-based platforms

Content Provider	IEEE Xplore Digital Library
Author	Grimsrud, L. Lalezari, F. Filipovic, D.
Copyright Year	2008
Description	Author affiliation: Colorado Univ., Boulder, CO (Grimsrud, L.)
Abstract	A nonuniform amplitude, equal-phase, fixed beam, 19-element circular array is developed for broadband satellite-to-satellite and satellite-to-ground L-band communication systems. Array topology consists of one center element and two concentric rings, inner ring with six and outer ring with 12 elements. To reduce the losses, the extremely low-loss property of air-loaded transmission lines, specifically rectacoax and suspended stripline, are used to design a low-loss beamforming network (BFN). The elements in the array have equal phase and unequal, 3-bit amplitude distributions (center element, inner and outer ring). A nonuniform amplitude distribution is designed to minimize the side-lobe levels (targeted value is 30 dB below the main lobe) and maximize the gain over a main beam beamwidth of plusmn10deg. Several amplitude distributions are considered, beginning with uniform distribution and ending with an array layout that has its spatial dimensions and amplitude distributions determined by a genetic algorithm that computes the array pattern based on element pattern and array factor. Element patterns are measured to validate simulated results using the method of moments (MoM) code, FEKO.
Starting Page	1
Ending Page	4
File Size	897728
Page Count	4
File Format	PDF
ISBN	9781424420414
DOI	10.1109/APS.2008.4619789
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-07-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arrays Power transmission lines Dielectrics Conductors Stripline Computational modeling Antenna measurements
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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