An Integrated 5.8-GHz FMCW Phased Array Doppler Radar Utilizing Wideband Miniaturized TX/RX Patch Antenna Arrays

A 5.8-GHz integrated FMCW phased array Doppler radar utilizing wideband miniaturized patch transmit and receive (TX/RX) antenna arrays is presented for object localization and range detection applications. The system consists of a core 5.8-GHz sensor chip including a homodyne 8-element array receiver with maximum gain of 47 dB, a 4-element transmitter array with maximum EIRP of 26 dBm and a signal generation unit with a maximum FMCW bandwidth of 275 MHz. Two 2×4 (RX) and 1×4 (TX) antenna arrays are fabricated to cover the required FMCW bandwidth and maintain 70 dB of TX-to-RX antenna isolation for proper target detection up to 6m away from the radar. A maximum
$+/-50^{\circ}$
of field-of-view is achieved by beam steering capability of the phased array transceiver radar. The number of RX antenna elements are considered twice the TX array to enhance the receiver gain and sensitivity.