A Planar Extended Monopulse Doa Estimation Antenna Integrating an Rf Multiplier

Abstract

Abstract-This paper proposes a novel planar direction-of-arrival (DOA) estimation antenna. The estimation capability of phase monopulse DOA estimation antennas is enhanced by integrating an RF multiplier that detects the phase relation between the sum and difference of the two received signals.The proposed antenna provides a wide range of estimation whereas the conventional monopulse DOA estimation antennas determine the angles of half space. A prototype antenna has been fabricated, and the proposed concept was successfully confirmed.

Ambiguity Resolution in Amplitude-Comparison-Based Monopulse Direction-Finding Antenna Systems

“…Δ/Σ = tan(βd/2×(sin(θ The equation (3) indicates that the AoA can be estimated by taking the ratio of Σ and Δ signals. The simulated Σ and Δ patterns and the calculated characterized mono-pulse function (Δ/Σ) are plotted in Fig.…”

“…In amplitude comparison monopulse technique, due to absence of phase information, the echo signal inside the field-of-view (FoV) region can create angular ambiguities, which causes false angle-of-arrival (AoA) estimation. Two mechanisms to mitigate such angular ambiguities in conventional monopulse antenna systems are reported in [3][4]. In [3], the RF-multiplier was used to determine the sign associated with the AoA.…”

“…Two mechanisms to mitigate such angular ambiguities in conventional monopulse antenna systems are reported in [3][4]. In [3], the RF-multiplier was used to determine the sign associated with the AoA. Such phase comparators increase the cost of the system at higher frequencies.…”

Dual-axis monopulse direction-of-arrival estimation planar antenna employing multilayer structure

“…Planar DOA estimation antennas using magic-Ts were already proposed [2][3][4][5]. These DOA estimation antennas can determine the angle of arrival in a single plane by employing the phase monopulse mechanism.…”