Literature review: Wideband/Multiband Antenna Arrays for Base Station Applications
2013 (English)Report (Other academic)
The scope of this literature study is to describe the current trends in multiband/wideband antenna arrays with wide scan angle that are applicable to the Chase project: Next Generation Antenna Arrays. The goal of this project is to develop a broadband/multiband antenna array that is able to operate at all commercial wireless protocols and provide wide scan angle capabilities. In the literature two different approaches have been developed for the array design procedure. The first approach, which is the classic design procedure, is based on the element and the array lattice selection. It is then expected that the array inherits the element behavior thus the characteristics of the array would be similar to element characteristics. Using this procedure the interelement coupling is treated as an undesired phenomenon which causes unwanted resonances inside the operating frequency range. Over the last decade a new technique was developed that utilize strongly coupled elements and they showed that these elements can provide wideband array characteristics. The first indicator for this behavior was the Vivaldi array. Here, it was shown that electrically connected Vivaldi elements can provide large bandwidth and wide scan angle range. This breakthrough opened a new research area were strongly coupled elements and coupling mechanisms are investigated, it has also generated a new design approach. This literature survey is organized on these two different approaches. In the first chapter we examine the elements that can provide wideband or multiband characteristics. In the second chapter the most promising strongly coupled arrays are examined and we compare their properties to the project requirements. We end this literature survey with conclusions selecting the most promising technologies.
Place, publisher, year, edition, pages
2013. , 36 p.
IdentifiersURN: urn:nbn:se:kth:diva-140606OAI: oai:DiVA.org:kth-140606DiVA: diva2:691594
QC 201402212014-01-282014-01-282014-02-21Bibliographically approved