Abstract: A projectile launcher sight incorporates the combination of a pendulum sight subassembly together with a mechanism for adjusting the position of the pendulum sight subassembly relative to the projectile launcher. The pendulum sight subassembly provides for automatic range compensation, and the position adjusting mechanism provides a means for compensating for the elevation of the shooter relative to the target. This enables the pendulum sight assembly to be calibrated under relatively level shooting conditions, and then used with accuracy under conditions where the elevation of the shooter differs from that of the target. The position adjusting mechanism is provided with an indexing mechanism for setting the position to one of a plurality of precalibrated positions so that the elevation adjustment can be readily made under low light conditions or while wearing gloves. The projectile launcher sight is particularly suited for application as an archery bow sight.

Abstract: An electrically small broadband antenna comprises a plurality generalized contrawound toroidal helical antenna elements, each made from a single continuous conductor divided into two length portions each of which are substantially the same length and which have a generalized helical pattern, wherein the helical pitch senses the two length portions are opposite to one another, and the two length portions are insulated from one another and overlap one another on the surface of a generalized toroid. Each antenna element incorporates a signal coupler with an impedance matching network, wherein the first ports of the plurality of signal couplers are in proximate location to one another and are connected together to a common signal input port, and the second ports of the respective signal couplers are connected to the respective signal feed ports at the node locations where the respective length portions join one another, or at a diametrically opposite location.

Abstract: In an electromagnetic antenna a continuous conductor comprises a first length portion and a second length portion, the first and second length portions each having a first end and a second end whereby the first end of the first length portion connected to the second end of the second length portion at a first node, and the second end of the first length portion is connected to the first end of the second length portion at a second node.

Abstract: An electrically small antenna is disclosed that is constructed from a generalized contrawound toroidal helix made from a single continuous conductor divided into two length portions each of which are substantially the same length and which have a generalized helical pattern. The helical pitch senses the two length portions are opposite to one another. The two length portions are insulated from one another and overlap one another on the surface of a generalized toroid. A signal is fed to the antenna at a port defined by the node locations where the respective length portions join one another, or at a diametrically opposite point. At the fundamental mode of operation, the antenna is a half guided wavelength in circumference. The size of the antenna is further reduced because of the slow-wave properties of the underlying generalized contrawound toroidal helix.

Abstract: An electrically small antenna is constructed from a generalized contrawound toroidal helix made from a single continuous conductor divided into two length portions each of which are substantially the same length and which have a generalized helical pattern. The helical pitch senses the two length portions are opposite to one another. The two length portions are insulated from one another and overlap one another on the surface of a generalized toroid. A signal is fed to the antenna at a port defined by the node locations where the respective length portions join one another, or at a diametrically opposite point. At the fundamental mode of operation, the antenna is a half guided wavelength in circumference. The size of the antenna is further reduced because of the slow-wave properties of the underlying generalized contrawound toroidal helix. The antenna is omnidirectional with vertical polarization with a radiation pattern similar to an electric dipole, but in a physical package that is substantially smaller.