Novel Dual Band Microstrip Circular Patch Antennas Loaded with ENG and MNG Metamaterials

Figure 7

Geometry of a circular microstrip patch antenna partially loaded with metamaterial (MNG) substrate and ground plane with parameters: 𝜂𝑎=(.56mm)(20mm)=11.2mm, 𝑎=20mm, ℎ=5mm, 𝑡_𝑔=2mm, 𝐷_𝑔=40mm, 𝜀₂=1.33, 𝜀₁=1.33, 𝜇₂=1, 𝜇₁=−2.83 (at 2.56 GHz), and feed position 𝑓_𝑝=15mm.