A high-gain circularly-polarized patch antenna design using an advanced shielding technique

In this paper, a high-gain circularly-polarized antenna is created by integrating a simple linearly-polarized patch antenna and an advanced electromagnetic shielding. This shielding is specially designed to have a band-pass property which could reduce the electromagnetic interference (EMI) of the shielded system and allow its signal wave radiated from the internal antenna to pass through. Moreover, the shielding could transform a linearly-polarized wave to circularly-polarized and highly increase its gain as well.