Multi-Band Freeform RF GRIN Lens Optimization

As the requirements for antenna performance continue to grow, multi-band and multi-functional apertures are increasingly sought after to meet system needs in a variety of application areas. However, it can often be cost prohibitive to replace legacy systems, and thus solutions for enhancing their existing behavior are desirable. For example, enhancing scan range or gain at certain bands with an augmentation of the system may be sufficient to extend the life of legacy systems. Moreover, realizing performance enhancement through a low-cost solution makes the proposition even more enticing. To this end, gradient index (GRIN) lenses offer designers the potential to enhance aperture gain and scan range. GRIN lenses may also be considered for potential radome solutions, where environmental protection and/or visual obfuscation is needed.