Design of a Single Radiator Monopulse Antenna for UWB Direction Finding

Compact Amplitude-Only Direction Finding Based on a Deep Neural Network with a Single-Patch Multi-Beam Antenna

“…The proposed direction-finding system has lower complexity and higher estimation probability, even in a small size, compared to similar references, as summarized in Table 4. The estimation probability of the proposed antenna is at least 0.9% to 3.5% higher than that of the refer-ences [22,23] and our previous work [27] without adding antennas or increasing the size, using only a single antenna. The proposed system is expected to be used for the IoT or sensors that require low complexity and simple structure direction finding.…”

“…The electric field distribution and the radiation pattern of the final single-patch multibeam antenna structure by the excitation port are presented in Table 2 and Figure 8, respectively. However, when a single port is used for excitation, the wide beamwidth of the radiation pattern can cause ambiguity in signal level resolution between patterns, as previously studied in [27]. In the amplitude comparison method, the distinction between the received power values for each pattern should be clear because ambiguity occurs in areas where patterns overlap due to the wide beamwidth.…”

“…The length of the parasitic element is set to 19 mm, which is slightly shorter than the resonance length (21 mm) of the divided patch so that the parasitic element acts like a director to spread the field at the edge of the patch outward. However, when a single port is used for excitation, the wide beamwidth of the radiation pattern can cause ambiguity in signal level resolution between patterns, as previously studied in [27]. In the amplitude comparison method, the distinction between the received power values for each pattern should be clear because ambiguity occurs in areas where patterns overlap due to the wide beamwidth.…”