A Planar SIW-Based Mm-Wave Frequency-Scanning Slot Antenna Array With No Scan Blindness at Normal

Planar antenna reflectors are the modern design trend of both multibeam and frequency-scanning arrays. The planar implementation is typically performed using substrate-integrated waveguide (SIW) technology. A reflector’s profile can be different from canonical one (parabolic, elliptic, hyperbolic, etc.) because effect spatial dispersion reflection coefficient SIW-based surface. It should synthesized considering magnitude argument field reflected such a surface to maximize efficiency reflection. In this article, we present millimeter-wave (mm-wave) slot array with horn–reflector feeding. We analytically formulate optimization SIW dimensions while accounting for coefficient. minimize Finally, demonstrate that dual-slot radiating element, avoid effects scan blindness along normal direction. prototype has been built good agreement achieved between measured results predicted based on calculations. ±17° beam scanning within 16% operational frequency range, no