Fast evaluation of the radiation patterns of true time delay arrays with beam steering

Amir Shlivinski, Amir Boag

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A multilevel algorithm for the computation of the transient radiation patterns of true time delay (TTD) conformal arrays over a range of observation and beam steering directions is presented. The multilevel algorithm is based on hierarchical decomposition of the array into smaller sub-arrays of elements. At the finest level of decomposition, the angular-temporal radiation patterns of single-element sub-arrays are obtained over a sparse angular grid of directions and short temporal duration, by either measurement or calculation. Subsequent steps of the algorithm comprise multilevel aggregation of delayed sub-array contributions. This process continues until the transient radiation pattern of the whole array is obtained. At each level, the radiation pattern is interpolated to a finer angular grid of observations and steering directions followed by temporal delay compensation. The multilevel array decomposition algorithm attains a computational complexity substantially lower than that of the direct evaluation. Furthermore, the algorithm is particularly efficient for large arrays with large numbers of elements.

Original languageEnglish
Pages (from-to)3421-3432
Number of pages12
JournalIEEE Transactions on Antennas and Propagation
Issue number12
StatePublished - 1 Dec 2007


  • Antenna transient analysis
  • Computation time
  • Delays
  • Domain decomposition
  • Time-delay arrays
  • Transient analysis
  • Ultrawideband (UWB) antennas
  • Ultrawideband communication

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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