An example-Traditional method for size reduction e=/VB,≈/2，ka=π Using high permittivity dielectric 2。/2,ka=π/2 Using short Short edge Short edge 2./4,ka=π/4 ↓ Short edge Using symmetry 。/6≈/12，ka=π/6 Short edge Using meanderingAn example—Traditional method for size reduction Short edge Short edge 0 0 0 / / 2, g r         k a 0 / 2, / 2 g   k a  0 / 4, / 4 g   k a  0 0 / 6 /12, / 6 g      k a Using high permittivity dielectric Using short Using symmetry Using meandering Short edge Short edge