A New Compact Wideband MIMO Antenna—The Double-Sided Tapered Self-Grounded Monopole Array

Abstract

We present a new compact wideband MIMO (multiple input multiple output) antenna-the double-sided 4-port armtapered self-grounded monopole array, briefly referred to as the butterfly antenna, in the paper. The antenna is very compact with low correlation between ports and high diversity gain. The genetic algorithm optimization scheme has been employed in the design. Simulation results have been verified against measurements. The measured reflection coefficients at all ports are below-7 dB over 0.5-9 GHz and below-4.5 dB over 0.4-0.5 GHz and 9-15 GHz. The measured correlation coefficients are below 0.4 over 0.4-15 GHz and lower than 0.1 in most of the frequency band. This new MIMO antenna is developed as a transmit antenna in reverberation chambers, and we believe that it will find more applications in other systems, such as micro base station antennas in wireless communication systems.

Arrangements and applications of self-grounded antennas

“…The polarization balance is defined as the ratio of power between two orthogonal components, which is a function of direction (θ, ϕ) [13]. Fig.…”

Two new types of compact ultra-wideband antennas for EMC measurements

“…III. THE SELF-GROUNDED ANTENNA The basic geometry of the self-grounded antenna [8]- [10] is shown in Fig. 6.…”

“…One example, the Butterfly antenna, is shown in Fig. 9, which is of interest as chamber antenna in reverberation [10], [11]. Fig.…”

An l‐shaped 4‐element monopole MIMO antenna system with enhanced isolation for mobile applications

“…Isolation was improved using fork shaped structure and minimum isolation observed was 10dB. In , a compact wideband MIMO antenna consisting of a double sided 4‐port arm‐tapered Self‐ground monopole was presented. The overall size of the MIMO system was 250 × 252.23 mm 2 .…”