Spiral Elements for Broad-Band Phased Arrays
2005 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 0096-1973, Vol. 53, no 8, 2558-2562 p.Article in journal (Refereed) Published
In this paper, we present a numerical analysis of an infinite periodic array of planar spiral elements with octave bandwidth. For off-broadside scan the array is found to exhibit very narrow resonances, which are independent of scan angle. They occur when the spiral arms are multiples of half a wavelength, in which case the current forms a high amplitude standing wave along the spiral arms. The resonances are conveniently suppressed by making the arms unequally long. We also discuss the equivalent 3-port for this nonsymmetrical array element and evaluate the element polarization performance.
Place, publisher, year, edition, pages
2005. Vol. 53, no 8, 2558-2562 p.
broad-band arrays, phased arrays, spiral antennas
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-8537DOI: 10.1109/TAP.2005.852309ISI: 000231156100024ScopusID: 2-s2.0-27644455861OAI: oai:DiVA.org:kth-8537DiVA: diva2:13888
QC 201009062008-05-282008-05-282010-09-06Bibliographically approved