Change search
ReferencesLink to record
Permanent link

Direct link
Nizamudin Hussain, Performance Limitations and Estimates for Infinite Array Antennas
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A novel quantitative measure for predicting the performance of arrays is tested on a few selected wide band arrays. This measure is called the array figure of merit. It is valid for lin-early polarized, infinite planar arrays, which are backed by a perfectly conducting ground plane. It predicts performance of arrays (which are free from grating lobes) in the E- or H-plane. The array figure of merit builds on the low frequency asymptotic expansion of the reflection coefficient and a sumrule of Rozanov type for passive structures. This measuretakes values between zero and one, and estimates array's performance on the basis of four key trade-off parameters:return loss, scan range, array thickness, and bandwidth. Arrays were found that yield values as high as 0.67, thus indicating a high performance array with respect to this measure. The sensitivity of the array figure of merit with respectto scan range is studied. Trade-off between bandwidth andreflection coefficient is investigated with respect to the ar-ray figure of merit. Finally an infinite array of stronglycoupled dipole elements is modeled and simulated. For this array, we test the sum rule based measure and find a veryhigh value for this measure: 0.84 - with 1 as its theoretical upper limit. This measurement reveals some insight into the influence of approximating material properties on the antenna performance measure.

Place, publisher, year, edition, pages
2013. , 78 p.
EES Examensarbete / Master Thesis
Keyword [en]
limitations, array antenna
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-144898OAI: diva2:715229
Educational program
Master of Science - Electrophysics
2013-12-04, TET-library, Teknikringen 33, Stockholm, 14:00 (English)
Available from: 2014-07-14 Created: 2014-05-02 Last updated: 2014-07-14Bibliographically approved

Open Access in DiVA

report(8499 kB)85 downloads
File information
File name FULLTEXT01.pdfFile size 8499 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Electromagnetic Engineering
Electrical Engineering, Electronic Engineering, Information Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 85 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 117 hits
ReferencesLink to record
Permanent link

Direct link