Development of a 100MHz bandwidth pulse compression subsystem for airborne application
Abstract
A substrate design incorporating SAW devices for passive signal encoding and pulse compression with 100 MHz bandwidth and 5 microsecond dispersion is described. The paper is divided into three parts covering SAW devices design, subsystem design and environmental testing. In order to minimize weight and power consumption the SAW devices were designed for implementation on ST-X quartz substrates. With this material and appropriate mechanical layout only minor changes in device performance are visible over an operating temperature range in excess of 100 C. In this development a new approach to the design of double dispersive, angle chirp filter is taken. The technique resulted in SAW devices with T.B. = 500, insertion loss less than 45 db and matched to give a compressed pulse width of 15 nanoseconds with 34 db sidelobe suppression. Subsystem design, including high gain, broadband amplifiers shows the need for care in mechanical and electrical layout and screening. Attention is given to design for low R.F.I. and good pulse compression performance in a unit operating in an airborne environment.
- Publication:
-
In AGARD Impact of Charge Coupled Devices and Surface Acoustic Wave Devices on Signal Process. and Imagery in Advanced Systems 10 p (SEE N78-31279 22-31
- Pub Date:
- June 1978
- Bibcode:
- 1978iccd.agarQ....B
- Keywords:
-
- Bandwidth;
- Surface Acoustic Wave Devices;
- Systems Engineering;
- Airborne Equipment;
- Electromagnetic Wave Filters;
- Environmental Tests;
- Quartz;
- Signal Processing;
- Electronics and Electrical Engineering