A Compact Dual-Broadband Multiple-Input Multiple-Output (MIMO) Indoor Base Station Antenna for 2G/3G/LTE Systems

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Abstract
In this paper, we propose a dual-broadband multiple-input multiple-output (MIMO) indoor base station antenna for 2G/3G/LTE systems. The proposed MIMO antenna has a low profile with its overall dimensions of 220 × 220 × 42 mm3, and utilizes both spatial and polarization diversities. The antenna operates at 800 -960 MHz and 1700 -2700 MHz simultaneously, with the return loss of higher than 14 dB across both frequency bands. The isolations of the antenna are 18 and 25 dB, with antenna gains of 3.6 and 7.2 dBi for the lower and upper frequency bands, respectively. The proposed MIMO antenna is designed and fabricated with its practical deployment in mind such as the durability and overall low cost. Comparing with existing commercial 2G/3G/LTE antennas, our proposed design offers more compact size and simpler feeding structure.
Funding Information
  • Thailand Research Fund (RSA5980051)

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