Title :
Miniature Long-Term Evolution (LTE) MIMO Ferrite Antenna
Author :
Lee, Jaejin ; Hong, Yang-Ki ; Bae, Seok ; Abo, Gavin S. ; Seong, Won-Mo ; Kim, Gi-Ho
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alabama, Tuscaloosa, AL, USA
fDate :
7/3/1905 12:00:00 AM
Abstract :
A long-term evolution (LTE) MIMO ferrite antenna was fabricated on Ni0.5Mn0.2Co0.07Fe2.23O4 ferrite substrate (14 × 7 × 3 mm3) and characterized for antenna performance. Measured return loss and isolation were -26 and -16.4 dB at 720 MHz, respectively. Correlation coefficient calculated from experimental S-parameters (S11, S22, S12, and S21) was less than 0.02 in the LTE band. Three-dimensional peak gain at 746 MHz was measured to be -8.83 dBi for antenna 1 and -8.32 dBi for antenna 2. These low antenna gains are attributed to high magnetic loss of ferrite substrate. Performance simulation suggests that antenna gain can be further improved up to -3.14 dBi with the use of low-loss ferrite.
Keywords :
Long Term Evolution; MIMO communication; antennas; copper compounds; ferrite devices; iron compounds; manganese compounds; nickel compounds; Long Term Evolution; Ni0.5Mn0.2Co0.07Fe2.23O4; correlation coefficient; frequency 720 MHz; loss -16.4 dB; loss -26 dB; miniature LTE MIMO ferrite antenna; size 14 mm; size 3 mm; size 7 mm; Antenna measurements; Antennas; Ferrites; Gain; MIMO; Substrates; Ferrite antenna; long-term evolution multiple-input–multiple-output (LTE MIMO); miniaturization;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2159468
