Quad-Band MIMO Antenna Array for Portable Wireless Communications Terminals

• Published in: IEEE antennas and wireless propagation letters Vol. 8; pp. 129 - 132
• Main Authors: Bhatti, R.A., Jung-Hwan Choi, Seong-Ook Park
• Format: Journal Article
• Language: English
• Published: New York IEEE 2009; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna; Antenna arrays; Antenna measurements; Antennas; Arrays; Diversity methods; Frequency; Frequency bands; Gain; Gain measurement; Ground plane; MIMO; multiple-input-multiple-output (MIMO); planar inverted-F antenna (PIFA); Resonance; Slot antennas; small antenna; Terminals; Volume measurement; Wireless communication; Wireless communications
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2008.2012274

A low-profile quad-band antenna array for multiple-input-multiple-output (MIMO)-enabled wireless communication terminals has been presented in this letter. The proposed dual-element antenna array operates at the following frequency bands: 2.4-2.5 GHz, 3.4-3.6 GHz, 5.15-5.35 GHz, and 5.75-5.875 GHz. A combination of a C-shaped slot and a T-shaped slit is used to excite three current modes in a conventional single-band planar inverted-F antenna (PIFA). A lambda/4 resonator is integrated into the triband antenna structure in order to get an additional resonance for quad-band operation. The proposed array has been designed over a small ground plane measuring 50times100 mm 2 , whereas each element in the array occupies a volume of 0.63 cm 3 . Mean effective gain (MEG) and envelop correlation analysis have been used for the array analysis in addition to the capacity and diversity gain measurements in a reverberation chamber. The prototype array exhibits quite low mutual coupling with good input return losses at the desired four frequency bands.