MULTI LEVELED ACTIVE ANTENNA CONFIGURATION FOR MULTIBAND MIMO LTE SYSTEM
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United States of America Patent
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Issued Date -
May 16, 2013
app pub date -
Sep 12, 2012
filing date -
Feb 17, 2011
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Abandoned
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Abstract
An active antenna system and algorithm is described that provides for dynamic tuning and optimization of antenna system parameters for a MIMO system where correlation and isolation between antennas in the system are dynamically altered to provide for greater throughput. As one or multiple antennas are loaded or de-tuned due to environmental changes, corrections to correlation and/or isolation are made by selecting the optimal antenna radiation pattern and by adjusting electrical length and/or reactive loading of transmission lines connecting the antennas. Multiple Isolated Magnetic Dipole (IMD) antennas are co-located and connected with a feed network that can include switches that adjust phase length for transmission lines connecting the antennas. Filtering is integrated into the feed network to improve rejection of unwanted frequencies. Filtering can also be implemented on the antenna structure.
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