Antennenmodellierung mit Diagrammsynthese zur Systemanalyse von konformen Gruppenantennen

The present work deals with theoretical principles of antenna modelling and pattern synthesis methods for antenna arrays on arbitrarily shaped surfaces including numerical and experimental results for selected exemplary geometries. A novel antenna modelling method is presented which is based on antenna elements radiating spherical wave modes of low order. The application of this fully polarimetric multimode antenna element allows for the calculation of mutual coupling interferences between different elements and prediction of important high-frequency parameters such as array far field, directivity and coupling coefficients for system performance prediction. Additionally, a polarimetric pattern synthesis method for conformal antenna arrays based on excitation by sector wave modes has been developed. Physical wave functions in the cylindrical and spherical coordinate system are derived for the composition of desired reference far fields for single or double curved geometries. The domain of these functions may optionally be limited to a sector subarea. The methods presented in the scope of this thesis have been applied to several typical single and double curved antenna geometries. System parameters such as directivity, scanning range, bandwidth etc. have been calculated. For validation of the work data have been compared to measured results of selected antenna array geometries. Furthermore, the special problem of coherent reception of multiple signals with different angles of incidence and identical frequency has been investigated. In addition to literature examples, basic approaches for superresolution and digital beam forming for multi-channel antenna systems have been presented and examined using the presented methods. From these results the realized number of channels and signal-to-interference ratio have been evaluated.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2002

Author dc:creator

• Knott, Peter Hubert

Contributors dc:contributor

• Rembold, Bernhard

• info:eu-repo/classification/ddc/620
• Ingenieurwissenschaften

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123739%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:62149