Conformal X-Bank Seeker for Semiactivee Guided Projectile

Period of Performance: 11/07/2003 - 05/05/2004


Phase 1 SBIR

Recipient Firm

Technovative Applications
3160 - A Enterprise Street
Brea, CA 92821
Principal Investigator


This SBIR Phase I proposal is for the development of a conformal X-band antenna for an interferometric semi-active seeker for a 5 inch projectile. A seeker design based on interferometry is proposed because conventional seekers are difficult to implement on projectiles where high g forces at launch and body shape constraints make gimbals and radomes impractical. Conventional conformal antenna accuracies are susceptible to degradation when the target is off-axis. Interferometry offers more consistent off-axis performance and less sensitivity to antenna variations. The interferometric seeker can be implemented on both spinning and non-spinning projectiles and imposes no timing or special antenna requirements on the illuminator. Interferometry allows a variety of configurations and projectile installation options. The objectives of the proposed effort are to evaluate alternative interferometric antenna configurations,select that with the best performance/cost benefit and to validate its predicted performance by constructing and testing a laboratory prototype. Several configurations are discussed and described including conformal "patch" arrays, waveguide and minimally sized nose cone installed forward looking arrays. A plan is proposed that results in a prototype seeker antenna. An option is proposed that validates interferometric accuracy in a static projectile configuration.