An Agile Frequency Synthesizer/RF Generator for the SCAMP Terminal
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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This report describes a combination agile synthesizer and reference frequency generator called the RF Generator, which was developed for use in the Advanced SCAMP ASCAMP program. The ASCAMP is a hand-carried, battery-powered, man-portable ground terminal that is being developed for EHF satellite communications. In order to successfully achieve a truly portable terminal, aB of the subsystems and components in ASCAMP were designed with the following critical goals low power, lightweight, and small size. The RF Generator is based on a hybrid design approach of direct digital and direct analog synthesis techniques that was optimized for small size, low power consumption, fast tuning, low spurious, and low phase noise. The RF Generator was conceived with the philosophy that simplicity of design would lead to a synthesizer that differentiates itself from those used in the past by its ease of fabrication and tuning. By avoiding more complex design approaches, namely, indirect analog phase lock loops, a more easily produceable design could be achieved. An effort was made to minimize the amount of circuitry in the RF Generator, thereby making trade-offs in performance versus complexity and parts count when it was appropriate.
- Test Facilities, Equipment and Methods
- Command, Control and Communications Systems