Patent ID: 7151507
Filing Date: 2006-12-19
Classification: H01Q

Abstract:
1. A dual-band electromagnetic band gap (EBG) electronically scanned antenna (ESA) utilizing frequency selective surfaces (FSS), comprising a plurality of FSS waveguide phase shifters, each of said FSS waveguide phase shifters comprising: a low-frequency phase shifter comprising low-frequency EBG devices on vertical waveguide walls, horizontal waveguide broadwalls that are greater than the width of the vertical waveguide walls and a frequency selective surface located at the center of the horizontal waveguide broadwalls; and two high-frequency phase shifters formed within the low-frequency phase shifter wherein each high-frequency phase shifter comprises a vertical waveguide wall, the frequency selective surface, half of the horizontal waveguide broadwalls, and two high-frequency EBG devices located on each half of the horizontal waveguide broadwalls.