Method of reducing mode-degeneracy problem in annular-ring patch antennas

Effects of slotted and photonic bandgap

Effects of slotted and photonic bandgap ground planes on the characteristics of an air-substrate annular-ring patch antenna in the TM21 mode

✍ Shun-Yun Lin; Kin-Lu Wong 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 135 KB 👁 1 views

## Abstract This paper presents an experimental study on the characteristics of annular‐ring patch antennas with slotted and photonic bandgap (PBG) ground planes for operation in the higher order TM~21~ mode for conical‐pattern radiation. The antenna studied has an air–layer substrate, and is fed u