초록 ▼

A ruggedized ultra high radio frequency antenna disposable at the rear of a hardened target penetrator warhead is provided. The antenna is usable for communicating signals from a transmitter in a deployed target penetrator warhead to a local repeater where retransmission to a more remote location ca

A ruggedized ultra high radio frequency antenna disposable at the rear of a hardened target penetrator warhead is provided. The antenna is usable for communicating signals from a transmitter in a deployed target penetrator warhead to a local repeater where retransmission to a more remote location can occur. The antenna includes a length-shortening and penetration abuse-resistant dielectric embedding material also supporting the subterranean signal communication to the local repeater function. Antenna radiating element fabrication from porous material such as screen wire and use of the dielectric material in a manner providing large G force tolerance and external dielectric variations are included.

대표청구항 ▼

1. Conical monopole ruggedized transitional airborne to subterranean environment ultra high frequency antenna apparatus comprising the combination of:an electrically conductive ground plane member disposed on a rearward portion of an air deliverable earth penetration military weapon device; an upsta

1. Conical monopole ruggedized transitional airborne to subterranean environment ultra high frequency antenna apparatus comprising the combination of:an electrically conductive ground plane member disposed on a rearward portion of an air deliverable earth penetration military weapon device; an upstanding electrically conductive radiating element of ultra high frequency tunable length located in a central portion of said ground plane member and extending rearward of said military weapon device; said electrically conductive radiating element having both an inverted upstanding conical shape with a conical apex electrical node disposed adjacent said electrically conductive ground plane member while in electrical isolation therefrom and a conical base portion disposed generally parallel with and separated from said electrically conductive ground plane member; said electrically conductive radiating element being comprised of porous electrically conductive material disposed in a closed conical surface geometric configuration; a mass of cured elastic urethane resin dielectric material surrounding, embedding and impregnating said porous radiating element, ground plane, and extending from a radiating element-adjacent face of said electrically conductive ground plane member rearward of said military weapon device; said cured mass of urethane resin material having a dielectric constant greater than that of air and tending to increase an effective electrical length characteristic of said electrically conductive radiating element in excess of a physically-determined nominal ultra high frequency electrical length characteristic thereof; said cured mass of resin material also having external physical shape and dimensions compatible with a surrounding rearward receptacle portion of said military weapon device and compatible with earth and target penetration deceleration forces predicted for said military weapon device.