United States of America As Represented by the Secretary of the Air Force

John L Cesulka

Kenneth J Williamson

David M Onuffer

A semiconductor mounting arrangement inclusive of a heat sink member enabling desirable resistance to physical impact damage to the semiconductor device, the heat sink and the printed circuit board supporting the semiconductor device and the heat sink. The heat sink is fabricated of thermally and electrically conductive metal such as copper and captured by metallic interconnection such as soldering to conductors of the printed circuit board. Efficient thermal and electrical conductivity between semiconductor device and heat sink are achieved also by metallic interconnection such as soldering intermediate the semiconductor device and the heat sink. Desirable semiconductor device performance under extreme electrical and physical force transient loading conditions are disclosed.

Shock hardened mounting and cooling of a semiconductor device

A switch modulated low duty cycle low energy mass limited radio frequency beacon system for locating spent, un-exploded or experimental munitions projectiles in a large open-air test range or within a dirt backstop. The disclosed locator beacon is mounted on a rear portion of a projectile before launch and includes a protective (and antenna length-shortening) resin dielectric material housing in which locator beacon circuit components are contained and immunized against high G forces by a combination of component supporting, energy deflecting and energy absorbing protective arrangements.

High-G, low energy beacon system

A system for communicating hardened, buried target arrival-related data from an airborne warhead device to a remote mission analysis location is disclosed. The communicated information especially relates to impact deceleration events encountered by a hardened target penetration warhead, events arising from the warhead impacting with the earth and then with one or more layers of hardening material such as concrete disposed in or adjacent a subterranean target. Verification of warhead detonation may also be included in the communicated data. The system includes ultra high radio frequency communication from the subterranean warhead to a repeater apparatus disposed at or above the point of warhead earth impact followed by conventional signal relaying of the collected warhead experience data from the repeater to a remote mission analysis facility. Utilization of the system to verify effective neutralization of targets, even targets remaining visually obscured throughout an identification, strike and reconnaissance sequence, is disclosed along with the capability of such a system to limit the need for dangerous subsequent strikes against the same target.

Munitions success information system

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.

Airborne and subterranean UHF antenna

A low cost dedicated hardware arrangement for reconstructing successive data frames from for example a commutated telemetry-communicated serial stream of digital and analog data, data which may be of unspecified words per data frame content. Encoding and detection of a word length synchronization signal within each data frame of the stream in accordance with the protocol of a commercially available telemetry encoder/transmitter apparatus is contemplated in the disclosed embodiment of the invention. The disclosed system is tailored for minimum communication protocol flexibility along with minimum fabrication and utilized space costs. Use in the spread spectrum telemetry environment and fabrication using dedicated logic array techniques are also contemplated. Military and non-military uses of the system are feasible including uses in medical environments.

Growing community of inventors

Ft. Walton Beach, FL, United States of America

John L Cesulka