High isolation compact four-port MIMO antenna systems with built-in filters as isolation structure
2010 (English)In: Proceedings of the Fourth European Conference on Antennas and Propagation, Institute of Electrical and Electronics Engineers (IEEE) , 2010Conference paper, Published paper (Refereed)
Abstract [en]
In this work, we present a built-in filter method to enhance the isolation level between closely packed MIMO antennas. The built-in filter is composed of several slits etched on the ground of the antenna structure. The number and length of slits depend on both the resonance frequency and the structure of the MIMO antenna system. To illustrate its usefulness, two designs of compact planar four-port MIMO antenna systems with built-in filters are proposed. One MIMO system is composed of different types of antennas with similar radiation characteristics, such as polarization. The lateral size of the whole system is 0.64λ×0.48λ. To further reduce the size of the MIMO structure, polarization diversity is utilized in the second example. The dimension is only 0.4λ×0.4λ. In both cases, with the built-in filters, the isolation level can be improved by 10dB. In both MIMO systems, the measured port isolations between antennas are below -25dB, and the envelope correlations are smaller than 0.04, indicating good MIMO performance.
Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2010.
Keywords [en]
Antenna structures, Envelope correlation, Filter method, High isolation, Isolation level, Isolation structures, Lateral sizes, MIMO antenna, MIMO antenna system, Polarization diversity, Port isolation, Radiation characteristics, Resonance frequencies, Whole systems, Antenna grounds, Decoding, MIMO systems, Polarization, Resonance, Antennas
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-304953Scopus ID: 2-s2.0-77955338617ISBN: 9788476534724 (print)OAI: oai:DiVA.org:kth-304953DiVA, id: diva2:1611986
Conference
4th European Conference on Antennas and Propagation, EuCAP 2010, Barcelona, Spain, April 12-16, 2010.
Note
QC 20211116
2021-11-162021-11-162022-06-25Bibliographically approved