Abstract: A transversal radio frequency filter circuit having a low noise amplifier connected along an input signal path, a first power divider connected between the low noise amplifier and four single taps, and an output path connected to the outputs of each of the four single taps. Each of the four single taps having a coefficient control mechanism, a polarity selection mechanism, and a time delay element. The coefficient control mechanism can include a wideband digital step attenuator configured to support high control range of the coefficient. Additionally, the circuit can include a second power divider connected between the outputs of each of the four single taps and the output path. The circuit can further include a field-programmable gate array configured to control coefficient control mechanisms, the polarity selection mechanisms, and the time delay elements (when they are variable time delay elements).

Abstract: Two zippered panels attached to a personal flotation device with at least one panel being attached at an offset to an edge of the personal flotation device and at least one panel being stretchable. When zipped together the two panels provide a smooth exterior surface for the personal flotation device. The stretchability of the panels allow for a close fit of the personal flotation device while maintaining freedom of movement. The offset of the panels allows for the attachment of closures to the surface of the personal flotation device within the envelope formed by the panels.

Abstract: A wetsuit with a close fitting portion above the waist and a loose fitting portion below the waist is disclosed. The close fit of the upper portion provides thermal insulation and coverage in the manner of a conventional wetsuit, whereas the lower portion provides maximum freedom of movement. The wetsuit provides protection against irritation and ultraviolet radiation that is superior to the typical combination of jacket and trunks.

Abstract: A neck-entry wetsuit (10) with a closure loop panel (54), a collar panel (60), zipper panels (36, 38) and a back panel (26). Collar panel (60) forms an outer neck opening (80) with a cut out region that allows the outer neck opening to expand. Back panel (26) is form to ride against a person's back and itself forms part of an inner neck opening that expands to allow entry into and out of the wetsuit.

Abstract: A wetsuit (10) having an upper trunk portion (14), a lower trunk portion (12), and a neck region (16) including a neck opening (30). A closure panel (34) seals a V-shaped cut out region (38) that forms part of neck opening (30). Hooks (54) and loops (57) secure closure panel (34) in its closed position. In its open position, closure panel (34) substantially enlarges neck opening (30) to permit entry into and exit from the wetsuit through the neck opening. V-shaped cut out region (38) is limited to the upper trunk portion (14) and a double lined neoprene panel (45) is secured below the apex (43) of the V-neck opening. The double lined neoprene panel (45) acts as a stress disperser, in order to minimize wear and tear at the apex (43).