Direction of Arrival Estimation of RF Signals Using Five-Port Technology and High Resolution Method
نویسندگان
چکیده
This paper presents a system based on five-port demodulator which measures DoA (directions-of-arrival) of radio frequency signals received on an antenna array in the azimuth plane. The receiver operating at 2.4 GHz is composed of four five-port demodulators connected to a ULA (uniform linear array) of four patch antennas. The DoA is estimated by measuring the phase difference of signals picked up by the elements of the array. Analytical and measurement results prove high integration, low-cost implementation and less sensibility to the phase and amplitude imbalances of the proposed demodulator. Moreover, the system presents good performance in terms of precision and resolution by using MUSIC (MUltipleSIgnal Classification) method in DoA estimation.
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