Multi-beam Antenna Lenses Using Foamed Dielectric Composites

The patent removes conductive fibers from the dielectric lens material, extracting the harmful element that causes passive intermodulation distortion. The lens is made from pure dielectric material without conductive inclusions, eliminating the source of performance degradation while maintaining the lens's focusing function.

The patent uses conventional, inexpensive dielectric materials that can be easily manufactured and replaced if needed, rather than expensive specialized materials. This approach reduces manufacturing cost while achieving sufficient performance through proper material selection and lens design.

The patent optimizes the dielectric constant and loss tangent parameters of the lens material to minimize RF energy absorption. By carefully selecting materials with appropriate electromagnetic properties and adjusting lens geometry parameters, the design achieves beam width stability while minimizing energy loss through the lens.

The patent employs composite dielectric materials or layered dielectric structures that combine materials with complementary properties. This allows optimization of both beam focusing capability and RF energy transmission by combining low-loss materials with appropriate dielectric constants.

The patent designs multi-beam antennas that can serve multiple sectors from a single antenna structure. By using dielectric lenses to create multiple focused beams simultaneously, a single antenna can replace what would traditionally require multiple separate antennas, reducing tower loading requirements while maintaining high system capacity.

The patent employs electronically controllable beam forming with phased array technology combined with dielectric lenses. This allows dynamic adjustment of beam directions and patterns, enabling a single antenna system to adaptively serve multiple sectors as needed, maximizing system capacity without increasing physical infrastructure.