A new thrust in radar EMC design for the twenty first century

A review is presented of the technical requirements of MIL-STD-469 (Radar Engineering Design Requirements-Electromagnetic Compatibility), and the Radar Spectrum Engineering Criteria (RSEC) of the National Telecommunications and Information Administration (NTIA) both of which are intended to restrict the radiated emissions spectra of defense radars to enhance electromagnetic compatibility, with other cosite communications electronics. Each of these standards contains technically contrasting procedures for determining maximum acceptable limits to radar emissions. In contrast with MIL-STD-469, the RSEC document to NTIA approaches the radar EMC (electromagnetic compatibility) problem from the perspective of relative limits on spectral emission bandwidth. A theoretical examination of compliance difficulties with MIL-STD-469 is presented and contrasted with the RSEC. The analysis uses the method of determining the bounds of the spectrum of a continuous-wave pulse formulated by S.J. Mason and H.J. Zimmermann (1960) together with a modification of this method by P.D. Newhouse (1982) for determining the bounds on the spectrum of an FM (chirp) pulse