Ultra-Narrow Band Tunable Filter

摘要

The goal of this project was to develop the technology necessary to meet the need for a tunable ultra-narrow receiver front-end. We met the challenging major technical milestone of demonstrating that it is possible to tune a high-Q 100 kHz wide filter over a 10% tuning range. Tuning the ultra- narrow filters under this program required a two-generation improvement in tuning technology in both motor and feedback technology. The repeatability of tuning tip placement was improved by two orders of magnitude during the contract. The tuning range was simultaneously increased by two orders of magnitude. This culminated in a laboratory demonstration of the working technology. Two of the significant technology developments (small/embedded RF feedback and active vibration control) that were demonstrated under this contract were ultimately not integrated into the prototype delivered to NRL for evaluation.