THINNING AND BROADBANDING ANTENNA ARRAYS BY UNEQUAL SPACINGS.

reportActive / Technical Report | Accession Number: AD0602237 | Need Help?

Abstract:

The paper presents a theory for, and a method of designing a thinned or broadband antenna array by means of unequal spacings. Using the theory of unequally spaced arrays developed by one of the authors, an antenna array can be designed to produce a desired beamwidth and sidelobe level with the average spacing many wavelengths apart. The patterns are expressed in a series of the Anger functions and its sidelobe level is shown to decrease approximately as N to the minus 0.4th power where N is the total number of elements, and the gain is approximately equal to N. It is also shown that the sidelobe level can be improved by varying the amplitude distribution. Numerical examples are given to illustrate the method. Author

Author(s):
Ishimaru, Akira ; Chen, Y-s.
Author Organization(s):
WASHINGTON UNIV SEATTLE COLL OF ENGINEERING
Descriptive Note:
Technical rept. no. 83,
Annotation:
Thinning and broadbanding antenna arrays by unequal spacings.
Pagination:
0042

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-83, AFCRL-64 253
Contract/Grant Number(s):
AF19(628)-2763
Task Number(s):
563502
Project Number(s):
5635
Monitor Series:
64 253
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*ANTENNAS, *ANTENNA RADIATION PATTERNS, THEORY, ANTENNA LOBES, BROADBAND, BANDWIDTH, GAIN
Report Date:
1964 Mar 01