BASED ON A SIX-PORT INTEGRATED MIMO ANTENNA SYSTEM

(Received: 2015-12-15, Revised: 2016-01-28 , Accepted: 2016-03-03)

Authors Rifaqat Hussain, Ali H. Muqaibel, Wajih Abu-Al-Saud, Mohammad S. Sharawi,

Keywords #Microwave DF #Six-port circuit #Beamforming mode #Reconfigurable MIMO antenna #Cognitive radio platforms.

Abstract In this paper, a low complexity microwave based direction finding (DF) system is presented. The proposed system consists of a single six-port (SP) circuit integrated with a reconfigurable multiple-input- multiple-output (MIMO) antenna system. The SP circuit covers a wide frequency band (1.68-2.25 GHz). The SP circuit is also characterized for phase error compensation caused by the slight asymmetry of SP and power detectors. The reconfigurable MIMO antenna system used is a compact design and covers several well-known wireless standards in the frequency bands from 0.7 GHz to 3 GHz. The SP circuit is integrated with the reconfigurable MIMO antenna system to form a complete beam forming mode for second generation cognitive radio (CR) platforms. The proposed design is a complete integrated solution with DF capabilities for CR platforms. The design is suitable to be used in compact wireless handheld and mobile communication devices. The fabricated integrated system achieves ±16o accuracy in its direction of arrival estimates.

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