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

Figure 1

Geometry of a circular microstrip patch antenna partially loaded with metamaterial (ENG) substrate and ground plane with parameters 𝜂𝑎=(.56)(20mm)=11.2mm, 𝑎=20mm, ℎ=4.3mm, 𝑡_𝑔=2mm, 𝐷_𝑔=40mm, 𝜀₂=1.33, 𝜀₁=−1.9 (at 4.2686 GHz), 𝜇₂=1, 𝜇₁=1, and feed position from the centre 𝑓_𝑝=15mm.