beamwidth

The array is a periodic structure in space with elements placed at equidistant. d/λ acts as the frequency term and λ/d as the time period. The incremental phase shift between adjacent elements is (2π/λ)×d×[sin(θ)-sin(θ0)].  d is the inter-element distance in unit of λ, θ-any position during the scanning of the array and θ0 – the … Read more

Articles in this series Phased Array Antenna – an introduction Electronic Scanning Arrays (this article) Grating lobes in electronic scanning Array pattern multiplication Electronic scanning arrays This is considered to be the best feature of a phased array antenna. To be able to scan in a given space, without having to rotate the antenna is … Read more