Open this publication in new window or tab >>2022 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 64, no 1, p. 92-101Article in journal (Refereed) Published
Abstract [en]
Mutual coupling, or equivalently, the isolation between antennas, is a key parameter in antenna system design. In this article, the previously defined impedance density is generalized, and it is demonstrated how it can be used to obtain spatial information about the mutual coupling. The generalized impedance density is a real-valued scalar and it can be visualized as a three-dimensional (3-D) density in space. It is shown that there is a strong connection between regions with a positive (negative) generalized impedance density and a decrease (increase) of the coupling when an absorber is placed in that region. This predictive ability is a useful feature, which is tested for three numerical cases. The results are robust to the shape of the platform, and it can be compared across frequencies. By placing absorbers based on the generalized impedance density, it is possible to reduce the required amount of absorbers needed to obtain a certain reduction in mutual coupling. The visualization results and predictions of absorber positions are compared with a Poynting vector based method. Placing absorbers based on the generalized impedance density had a larger impact on the mutual coupling, compared to the predictions with the Poynting vector based method in the investigated cases.
Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2022
Keywords
Isolation, Mutual coupling, Reaction theorem, Reciprocity, Visualization
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-311431 (URN)10.1109/TEMC.2021.3102875 (DOI)000732635000001 ()2-s2.0-85114750420 (Scopus ID)
Note
QC 20220428
2022-04-282022-04-282022-06-25Bibliographically approved