## Abstract In this paper, time modulation is applied to a small number of elements of a linear array that radiates either sum or difference patterns, in order to take control over their sidelobe levels. The simulated annealing (SA) technique helps to obtain the optimum time pulses applied to such
The generation of sum and difference patterns using fractal subarrays
β Scribed by D. H. Werner; K. C. Anushko; P. L. Werner
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 126 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
β¦ Synopsis
In this letter, we explore the potential for the application of fractal subarrays to the generation of sum and difference patterns. For the purposes of this in¨estigation, a standard planar array is decomposed into two subarrays: one in the form of a Sierpinski carpet, and the other consisting of its complement. A methodology is then introduced for feeding the two subarrays in order to produce either a sum or a difference pattern. A particular example is considered in which directi¨e gain plots are obtained for both the sum and difference modes of a 27 = 27 planar array.
π SIMILAR VOLUMES
Data from the Norwegian Health Survey, a national cross-sectional study, were collected through interviews with a randomly drawn sample of members of private households, including 5454 women and 5122 men (0Β±80 years) in 1985. The response rate was 78.7%. They were interviewed at home and asked quest
In this paper we investigate the mid-infrared spectrum of the H 2 16 O molecule between 3367 and 3447 cm -1 to study the gas-collision-broadened linewidths. The coherent radiation used in this experiment is produced through difference frequency generation in a periodically poled lithium niobate crys