Planar microstrip antenna array for radar system with surveillance applications

A Low Profile and Low Sidelobe Wideband Slot Antenna Array Feb by an Amplitude-Tapering Waveguide Feed-Network

“…However, amplitude-taper with a specific sidelobe level is a nonlinear multivariable optimization problem which requires determining a large number of power division values within the feed-network. The Taylor's distribution is a well-known analytical approach for low sidelobe array design, and most of the published works implemented this method in microstrip planar arrays due to the ease of designing power-taper networks by microstrip lines [3][4][5][6]. Nevertheless, since waveguide structures occupy a large volume and lack design flexibility, it is difficult to design appropriate power-weighting waveguide feed-networks while considering amplitude and phase distributions among antenna apertures.…”

Cosec 2 hybrid travelling/resonant antenna for maritime surveillance applications

“…The present implementation constitutes a trade-off between bulky/heavy antennas and substrate-integrated waveguides (SIWs) or printed antennas of similar size (see e.g. [26]), whose performance is often limited in terms of gain and bandwidth [26][27][28][29][30]: in future work, we will make use of empty SIWs [31] for radar antennas, to try to reduce dielectric losses and weight.…”