Abstract: An arrowhead for use in a ballistic arrow having a radio locating transmitter comprises a composite structure of a dielectric shank having a plurality of electrically conductive blades that function as a counterpoise for a primary antenna of the transmitter. The blades are disposed symmetrically about a long axis of the shank in respective, uniformly spaced planes that extend radially outwardly from the outer surface of the shank. Another embodiment of the composite arrowhead comprises a unitary dielectric shank and blades wherein the counterpoise is formed by deposition of a thin metal layer on at least a portion of the shank and blade surfaces. The combination of the dielectric shank which is of low density and the electrically conductive counterpoise that is of small mass, effects an overall weight reduction in the arrow to achieve a flatter trajectory and increased flight range.

Abstract: An arrow that accepts standard target or hunting tips includes a radio signalling transmitter which emits a carrier signal that is receivable by a directional receiver for tracking and locating the arrow when released from a bow. The transmitter includes a carrier interrupting circuit operating at a rate that is inversely proportional to battery voltage which permits dynamically testing the battery prior to releasing the arrow. This provides reliable operation of the transmitter by insuring an adequate minimum charge in the battery. An electrical switch embodying the arrow tip as an actuator permits selectively connecting or disconnecting the battery from the transmitter to conserve the battery charge.