Monopulse (or simultaneous lobing) radars quickly gained popularity after their 1943 introduction by the US Naval Research Laboratories. Their principal benefit - the ability to obtain complete range, bearing, azimuth and elevation angle information from the return of a single pulse - is very appealing in applications such as fire-control tracking and missile control. Today nearly all radars serving these applications are of the monopulse variety, since other types require more pulses (and thus more time) to produce this information and no type can produce it all. However, in order to obtain the highest resolution from monopulse radar, components in the signal chain must control phase, amplitude, insertion loss and ripple to tolerances far in excess of those encountered in typical microwave applications. The FMP Series PC board-mountable IF filters designed for this application are phase and amplitude matched over an IF bandwidth to a reference standard with an unusually high level of precision. The performance achieved by the filters can be applied to other applications in which precise phase and amplitude matching are critical.
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