Lightweight Surveillance Radar AN/PPS-9.
Abstract
During the reporting period, the AN/PPS-9 Engineering Model was assembled in an open frame for subsystem test. After testing had begun, noise problems were encountered. Testing was then concentrated on subsystems and subunits in order to isolate noise sources and proceed with corrective action. Modifications to the wiring harness and the DC/DC Converter contributed only minor improvements in the S/N measurement. Suspicion then centered on the avalanche diode source and the hot carrier diode mixer; the latter was exonerated through testing. Difficulty was encountered in obtaining a CW source to substitute for the avalanche diode due to the required source S/N. The RCA Microwave Advanced Research group at the RCA Princeton Laboratories provided a TEO (Transfer Electron Oscillator) or Gunn diode which was placed in a modified avalanche diode cavity and tested. The results demonstrated that the avalanche diode was the major noise contributor. Radar results using the TEO were encouraging. Additional TEO's are now being procured, and an optimum cavity and TEO power supply module are being designed and fabricated.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1969
- Accession Number
- AD0852571
Entities
People
- H. T. Hicks
- J. F. O'brien