sunglasses A stack-ring configuration is proposed for designing a dual-band circularly polarized (CP) antenna.Each ring generates different resonant frequencies.A good CP performance at both resonant frequencies is achieved by adjusting the relative distance between the two rings.The two operating bands are separated with a small frequency ratio of 1.07.
Measured results show that radiation patterns with METAL DETOX SHAMPOO good CP characteristics are obtained at the two resonant frequencies.