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Raytheon Company has successfully demonstrated a new frequency-agile filter that delivers 25 watts of power at very high frequency (VHF), using MEMS relays to tune the filters output. The event was the first-ever demonstration of a high power, MEMS based, tunable radio frequency (RF) device. The new technology matched or exceeded several key performance criteria of traditional RF filters in a small package.
MEMS relays provide improved intermodulation performance under high power conditions with distinct advantages in size, power and performance. With MEMS relays, the area and volume of filter-tuning circuit boards can be 50% less than conventional filters using PIN diode switches. In addition, the demonstration showed that the typical power efficiency of conventional broadband RF amplifiers, usually around 30%, can be increased to as much as 80% with MEMS ...