LD7213 Datasheet | NEC

DATA S H E E T HIGH POWER TRAVELING WAVE TUBE FOR GROUND TERMINALS LD7213, LD7213L 14 GHz, 300 W CW, CONDUCTION COOLING, HIGH POWER GAIN, FLAT GAIN VARIATION GENERAL DESCRIPTION The NEC LD7213 and LD7213L are PPM-focused traveling wave-tubes designed for use as final amplifiers in the earth-to-satellite munications transmitter. These are capable of delivering an output power of 300 W over the range of 14.0 to 14.5 GHz and 13.75 to 14.5 GHz. They provide a high power gain of 55 d B at 300 W output, and flat gain variation of 1.5 d B at any power level. LD7213 is fully patible with TH3759K. Features ™ High Power Gain The power gain is typically 58 d B at small signal level and 55 d B at 300 W level. ™ Simple Cooling System The tubes are conduction-cooled, so that the cooling systems are greatly simplified. ™ PPM (Periodic Permanent Magnet) 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 advanced impregnated cathodes 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 suitable for digital munication service. For safe use of microwave tubes, refer to NEC document “Safety instructions to all personnel handling electron tubes” (ET0048EJ∗V∗UM00) The information in this document is subject to change without notice. Document No. ET0191EJ2V1DS00 (2nd edition) Date Published August 1998 M Printed in Japan © LD7213, LD7213L GENERAL CHARACTERISTICS ELECTRICAL Frequency ……………………………………………… LD7213 : 14.0 to 14.5 GHz LD7213L : 13.75 to 14.5 GHz Cathode ………………………………………………… Indirectly heated, Impregnated Heater Voltage …………………………………… 6.1 V Heater Current …………………………………… 1.05...