Some optimum antenna arrays / Charles J. Drane, Jr.
This is a theoretical study of certain optimum linear arrays of nonuniformly spaced, isotropic antennas. For this purpose, the beamwidth of any given radiation pattern is defined in a new, integral sense, with low values denoting highly directional radiation patterns with low sidelobes. The present...
Saved in:
| Main Author: | |
|---|---|
| Corporate Author: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
L.G. Hanscom Field, Mass. :
Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force,
1966.
|
| Series: | AFCRL ;
66-732. Physical sciences research papers (Air Force Cambridge Research Laboratories (U.S.)) ; no. 283. |
| Subjects: |
MARC
| LEADER | 00000cam a2200000Ii 4500 | ||
|---|---|---|---|
| 001 | b8854538 | ||
| 003 | CoU | ||
| 008 | 090331e196610 maua bt f000 0 eng d | ||
| 005 | 20231212011057.9 | ||
| 035 | |a (OCoLC)ocn317494090 | ||
| 035 | |a (OCoLC)317494090 | ||
| 040 | |a LHL |b eng |c LHL |d OCLCF |d OCLCO |d OCLCQ |d COD | ||
| 049 | |a COD9 | ||
| 086 | 0 | |a D 301.45/40:283 | |
| 088 | |a AFCRL 66-732 | ||
| 088 | |a AD 648633 | ||
| 100 | 1 | |a Drane, Charles J., Jr. | |
| 245 | 1 | 0 | |a Some optimum antenna arrays / |c Charles J. Drane, Jr. |
| 260 | |a L.G. Hanscom Field, Mass. : |b Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, |c 1966. | ||
| 300 | |a vi, 33 pages : |b illustrations, tables ; |c 28 cm. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a unmediated |b n |2 rdamedia. | ||
| 338 | |a volume |b nc |2 rdacarrier. | ||
| 490 | 1 | |a Physical Sciences Research Papers ; |v No. 283. | |
| 490 | 1 | |a AFCRL ; |v 66-732. | |
| 500 | |a "October 1966." | ||
| 500 | |a AD0648633 (from http://www.dtic.mil) | ||
| 500 | |a Microwave Physics Laboratory Project 8683. | ||
| 500 | |a Research supported by the Microwave Physics Laboratory, Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, L.G. Hanscom Field, Bedford, Massachusetts. | ||
| 500 | |a This report represents a thesis presented to M.I.T. in partial fulfillment of the requirements for the degree of Master of Science in Mathematics. | ||
| 504 | |a Includes bibliographical references (page 33) | ||
| 520 | |a This is a theoretical study of certain optimum linear arrays of nonuniformly spaced, isotropic antennas. For this purpose, the beamwidth of any given radiation pattern is defined in a new, integral sense, with low values denoting highly directional radiation patterns with low sidelobes. The present work is almost wholly concerned with the choice of (1) the excitation currents, and (2) the locations of individual antennas to minimize this particular beamwidth. It is shown that the first of these two choices reduces to a straightforward eigenvalue problem involving symmetric matrices. The search for the optimum element locations, however, requires also a knowledge of the derivatives of this 'best' beamwidth with respect to changes in the element spacings, together with some hunting procedure to arrive at configurations for which all those are zero. In the present computations, the latter consisted of a step-by-step procedure wherein the locally optimum beamwidth and its derivatives for any given array were first computed via the matrices, and successive neighboring configurations were then defined automatically with the elements shifted by amounts (of prescribed total magnitude) calculated to reduce the beamwidth as much as possible at every step. Numerical results of these computations are here presented for arrays ranging from four to forty symmetrically placed elements. On the whole, they seem to indicate that the best configurations in cases where the overall aperture is not constrained are ones in which the elements are spaced very nearly uniformly, with separations of the order of 0.8 to 0.9 times the wavelength. (Author) | ||
| 583 | 1 | |a committed to retain |c 20230101 |d 20480101 |5 CoU |f Alliance Shared Trust |u https://www.coalliance.org/shared-print-archiving-policies. | |
| 650 | 0 | |a Antenna arrays. |0 http://id.loc.gov/authorities/subjects/sh85005503. | |
| 650 | 0 | |a Linear systems. |0 http://id.loc.gov/authorities/subjects/sh85077183. | |
| 650 | 0 | |a Antenna arrays |x Design. | |
| 650 | 7 | |a Antenna arrays. |2 fast |0 (OCoLC)fst00810032. | |
| 650 | 7 | |a Antenna arrays |x Design. |2 fast |0 (OCoLC)fst00810033. | |
| 650 | 7 | |a Linear systems. |2 fast |0 (OCoLC)fst00999098. | |
| 710 | 2 | |a Air Force Cambridge Research Laboratories (U.S.) |0 http://id.loc.gov/authorities/names/n81133515 |1 http://isni.org/isni/0000000121678046. | |
| 830 | 0 | |a AFCRL ; |v 66-732. |0 http://id.loc.gov/authorities/names/no2008179587. | |
| 830 | 0 | |a Physical sciences research papers (Air Force Cambridge Research Laboratories (U.S.)) ; |v no. 283. |0 http://id.loc.gov/authorities/names/no2008179573. | |
| 907 | |a .b88545386 |b 03-19-20 |c 09-20-16 | ||
| 998 | |a pas |b 09-20-16 |c r |d m |e - |f eng |g mau |h 0 |i 1 | ||
| 907 | |a .b88545386 |b 10-11-17 |c 09-20-16 | ||
| 944 | |a MARS - RDA ENRICHED | ||
| 907 | |a .b88545386 |b 10-04-16 |c 09-20-16 | ||
| 907 | |a .b88545386 |b 09-20-16 |c 09-20-16 | ||
| 948 | |a gro16/17:cjg | ||
| 999 | f | f | |i 4f68506a-5196-5198-88ba-40e456078e7a |s dd0977a5-d4d4-56c7-8bc0-7260c9970810 |
| 952 | f | f | |p Can circulate |a University of Colorado Boulder |b Boulder Campus |c Offsite |d PASCAL Offsite |e D 301.45/40:283 |h Superintendent of Documents classification |i document |m P106182014048 |n 1 |