LD7267

DATA S H E E T HIGH POWER TRAVELING WAVE TUBE FOR COMMUNICATIONS LD7267 SERIES 30 GHz, 100 W CW, CONDUCTION COOLING, HIGH POWER GAIN GENERAL DESCRIPTION The NEC LD7267 series of PPM-focused traveling wave tubes are designed for use as final amplifiers in the earth-to-satellite communications transmitter, LMDS (Local Multipoint Distribution Service) and other advanced communication systems. Three models of the LD7267 series are capable of delivering an output power of 100 W over the range of 26.5 GHz to 31.1 GHz and provide a high power gain of 50 dB at 100 W output power. These are equipped with dualstage depressed collector for enhancing overall efficiency and a single collector. Furthermore, they are of rugged and reliable design offering long-life service. FEATURES ™ High Power Gain The power gain is typically 50 dB at 100 W level. ™ Simple Cooling System The tubes are conduction-cooled, so that the cooling systems are greatly simplified. ™ PPM Focusing The tubes are PPM (Periodic Permanent Magnet) -focused, eliminating entirely the focusing power supplies and interlock circuits. ™ Rugged Construction The tubes are designed to be rugged, therefore they are suitable for transportable systems. ™ Long Life and High Stability The tubes employ an advanced impregnated cathode with a low operating temperature for long life. ™ Microdischarge Free The tubes are carefully designed to be free from microdischarge in the electron gun for long term operation, therefore they are suita...