Abstract
Multiple-input multiple-output (MIMO) direct conversion transceiver (MIMO-DCT) is one of the major advances in recent generation wireless standards that led to the large increase in the data rates and throughput via the use of multiple antennas on the receiver and transmitter sides. In this paper, the design of a compact miniature and low cost rectangular microstrip patch antenna integrated with hybrid coupler, Wilkinson power divider and single-pole double-throw (SPDT) transmitter/receiver (T/R) switch have been investigated for MIMO direct conversion, or zero IF transceiver system. Different parametric solutions have been optimizing the proposed structure components. The hybrid coupler can act as a phase shifter to provide the necessary characteristics to operate with I/Q signal for direct conversions. The entire proposed structure has been evaluated using a commercial software. The final proposed design has been fabricated and the radiation characteristics have been illustrated using network analyzer to meet the requirements for LTE and communication applications.
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