Calculating the mutual coupling between apertures on a convex circular cylinder using a hybrid UTD-MoM method
2001 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 0096-1973, Vol. 49, no 4, 672-677 p.Article in journal (Refereed) Published
In this paper, the problem of calculating the mutual coupling between apertures on a perfectly conducting circular cylinder is considered. The mutual coupling is calculated by a combination of uniform theory of diffraction (UTD) and the method of moments (MoM). This hybrid method makes it possible to include higher order aperture modes in order to improve the accuracy. It is found that the UTD-MoM solution gives accurate results, even for small cylinders. The results are verified against results found in the literature, as well as against measurements performed at Ericsson Microwave System in Molndal, Sweden. For this purpose, a cylindrical test antenna with 54 apertures was built. Using a single-mode approximation, good agreement down to about -60 dB, comparisons to measured data has been obtained. If additional modes are added the results improve significantly both in amplitude and phase, Zn several cases, the agreement is good down to coupling levels about -80 dB. This requires that about six modes are included. However, the most important mode, besides the fundamental TE10 mode is the TM11 mode.
Place, publisher, year, edition, pages
2001. Vol. 49, no 4, 672-677 p.
conformal arrays, mutual coupling, UTD/MoM
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-13442DOI: 10.1109/8.923330ISI: 000168640100022OAI: oai:DiVA.org:kth-13442DiVA: diva2:325349
QC 201006182010-06-182010-06-182012-06-12Bibliographically approved