Accession Number : ADA267620


Title :   Phased Array Antenna Analysis Using Hybrid Finite Element Methods


Descriptive Note : Doctoral thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING


Personal Author(s) : McGrath, Daniel T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267620.pdf


Report Date : Jun 1993


Pagination or Media Count : 148


Abstract : This research in computational electromagnetics developed a new method for predicting the near-field mutual coupling effects in phased array antennas, using the finite element method (FEM) in combination with integral equations. Accurate feed modeling is accomplished by enforcing continuity between the FEM solution and an arbitrary number of wave guide models across a ground plane aperture. A periodic integral equation is imposed above the antenna's physical structure in order to enforce the radiation condition and to confine the analysis to an array unit cell. The electric field is expanded in terms of vector finite elements, and Galerkin's method is used to write the problem as a matrix equation. A general-purpose computer code was developed and validated by comparing its results to published data for several array types. Its versatility was demonstrated with predictions of the scanning properties of arrays of printed dipoles and printed flared notches.


Descriptors :   *COMPUTER PROGRAMS , *WAVEGUIDES , *ANTENNA ARRAYS , *PHASED ARRAYS , *ELECTROMAGNETIC RADIATION , SPACE ENVIRONMENTS , FINITE ELEMENT ANALYSIS , ELECTRIC FIELDS , DIPOLES , METHOD OF MOMENTS , ANTENNA COUPLERS , BROADBAND ANTENNAS , CLADDING , NEAR FIELD , DESIGN CRITERIA , PRINTED CIRCUITS , MATHEMATICAL PREDICTION , MICROWAVES , TRANSMISSION LINES , AIRBORNE , THESES


Subject Categories : Electrical and Electronic Equipment
      Numerical Mathematics
      Computer Programming and Software
      Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE