Abstract
This paper summarizes a detailed computational study of Vivaldi flared horn antenna designs including single element, double element, crossed-pair subarray elements, and linear arrays using the finite-difference time-domain (FD-TD) method. FD-TD, which numerically solves Maxwell's time dependent curl equations, accounts for the complex geometrical and electrical characteristics associated with this antenna design and array implementation. Validations have been made relative to a moment method (MM) model of an electrically large linearly tapered slot antenna. Also, good correlation is shown to exist in the primary features of the antenna patterns between computed and measured data for all cases. This work has achieved a number of firsts for the FD-TD methodology. It represents the first “exact” computational model of a single quad Vivaldi slot antenna; the first “exact” computational model of a phased array of Vivaldi quad elements; and the first FD-TD model to demonstrate grating lobes for a phased array antenna of any sort. Lastly, this research represents an extensive study of the largest grid-based antenna models conducted to date.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 633-641 |
| Number of pages | 9 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 42 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 1994 |
Funding
Manuscript received March 10, 1993; revised September 8. 1993. This work was supported in part by Northrop Defense Systems Division, Rolling Meadows, IL, under Contract Ref. No. 1186017, and by Cray Research, Inc. The authors are with the EECS Department, McConnick School of Engi- neering, Northwestem University, Evanston, IL 60208 USA. IEEE Log Number 9401338.
ASJC Scopus subject areas
- Electrical and Electronic Engineering