Carbon fiber‐based deca‐port multiple‐input‐multiple‐output antenna with pattern diversity and high inter‐element isolation

Abstract

In this article, a deca-port carbon fiber-based multiple-input-multiple-output (MIMO) antenna with pattern diversity is presented. The radiating elements of the proposed antenna consist of low cost, light weight, environmental friendly graphite material. The 10 radiating elements of the MIMO antenna are arranged in a group of two (termed as sub-MIMO structure), in a cubical manner to cover all the propagating directions. Furthermore, the two carbon fiber-based radiating elements of the sub-MIMO structure are placed in an orthogonal arrangement to generate different radiation patterns. The antenna exhibits high inter-element isolation and low envelope correlation coefficient due to orthogonal placement of the radiating elements. The antenna is fabricated and the measured results confirm that the proposed MIMO/diversity antenna may be useful for vehicle-to-network applications. The MIMO performance parameters such as diversity gain, total active reflection coefficient, mean effective gain, channel capacity loss are evaluated and found within suitable limits. The three-dimensional pattern diversity helps to communicate in all directions.

Miniaturized microstrip patch antenna with high inter‐port isolation for full duplex communication system

“…Recently in numerous works, different methods have been proposed in order to increase isolation between antenna ports. [27][28][29][30][31][32][33][34][35][36] In proposed antenna in Reference 31, by placing transmitter and receiver ports on width and length of a simple patch and external feed forward loop, isolation about 40 dB in 24 MHz bandwidth has been achieved. Also dimension of this antenna is 134 mm  134 mm.…”