Abstract: A broadband antenna system utilizes multiple photonic bandgap crystals to achieve nearly 100 percent power efficiency over a larger range of frequencies than prior antenna systems. Multiple custom tailored photonic bandgap crystals form a substrate for the antenna system. Each of the crystals is designed to cover a specific range of frequencies. The multiple crystals are attached together to form a photonic bandgap substrate whose bandwidth varies as a function of location on the substrate. A broadband antenna that can cover a wide frequency range, and whose active region shifts to different portions of the antenna as a function of frequency, is formed on the substrate such that the active region of the antenna is always on a crystal that has a corresponding operating bandwidth. The photonic bandgap crystals provide a nearly 100 percent efficient reflector for radiation emitted into the substrate that would otherwise be trapped or dissipated therein.

Abstract: A remote imaging target sight that may be used with numerous weapons such as pistols, rifles and man-portable anti-tank weapons that provides a gunner with the ability to sight around a corner or an obstruction without exposing himself to enemy fire. The sight comprises an imaging telescope, a fiber optic bundle, and an objective lens employed for viewing, all of which are disposed in a flexible sheath or housing. The housing is mounted to and extends outside the body of the weapon to which the sight is secured. The imaging telescope may employ a replaceable lens section that permits the use of different lenses having different focal lengths. This permits the use of the weapon for differing sighting environments and target distances. The flexible housing typically comprises two pieces of metal or plastic coiled around each other to form an interlocked spiral coil of the type used on gooseneck lamps and microphones.