Radio frequency lens and method of suppressing side-lobes

Details Radio frequency lens and method of suppressing side-lobes Radio frequency lens and method of suppressing side-lobes

H - Electricity

01

Q

H01Q 15/02 (2006.01) H01Q 3/44 (2006.01) H01Q 15/10 (2006.01) H01Q 17/00 (2006.01)

Patent

CA 2622105

An RF lens according to the present invention embodiments collimates an RF beam by refracting the beam into a beam profile that is diffraction-limited. The lens is constructed of a lightweight mechanical arrangement of two or more materials, where the materials are arranged to form a photonic crystal structure (e.g., a series of holes defined within a parent material). The lens includes impedance matching layers, while an absorptive or apodizing mask is applied to the lens to create a specific energy profile across the lens. The impedance matching layers and apodizing mask similarly include a photonic crystal structure. The energy profile function across the lens aperture is continuous, while the derivatives of the energy distribution function are similarly continuous. This lens arrangement produces a substantial reduction in the amount of energy that is transmitted in the side-lobes of an RF system.

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