DocumentCode :
919710
Title :
Increasing Channel Capacity of an Ultrawideband MIMO System Using Vector Antennas
Author :
Rajagopalan, Ajit ; Gupta, Gaurav ; Konanur, Anand S. ; Hughes, Brian ; Lazzi, Gianluca
Author_Institution :
North Carolina State Univ., Raleigh
Volume :
55
Issue :
10
fYear :
2007
Firstpage :
2880
Lastpage :
2887
Abstract :
Recently it was shown that co-located vector antennas can provide the same capacity increase as spatial array antennas in multiple-input multiple-output (MIMO) systems. This paper describes the design of a vector antenna consisting of a loop antenna and two orthogonal bowtie antennas for a ultrawideband (UWB) MIMO system that operates in the frequency range 3.6-8.5 GHz. Channel capacity calculations performed with the antenna operating in a rich scattering environment show that spectral efficiency of the UWB vector antenna system approaches that of the traditional spatial array. This demonstrates that vector antennas can be used in place of spatial arrays where compact UWB multiantenna systems are needed.
Keywords :
MIMO systems; antenna arrays; bow-tie antennas; channel capacity; electromagnetic wave scattering; loop antennas; ultra wideband antennas; channel capacity; frequency 3.6 GHz to 8.5 GHz; loop antenna; multiple-input multiple-output systems; orthogonal bowtie antennas; scattering environment; spatial array antennas; spectral efficiency; ultrawideband MIMO system; vector antenna; Antenna arrays; Channel capacity; Dipole antennas; Frequency; MIMO; Mutual coupling; Scattering; Ultra wideband antennas; Ultra wideband technology; Vectors; Multiple-input multiple-output (MIMO) antenna; multiple-input multiple-output (MIMO) channel capacity; ultrawideband (UWB) antenna; vector antenna;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2007.905938
Filename :
4339587
Link To Document :
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