GENERAL DESCRIPTION

NEC LD7202 series of PPM-focused traveling wave tubes are designed for use as final amplifiers tube in the earth-to-satellite communications transmitter.

These are capable of delivering an output power of 600W over the range of 12.75 to 14.5 GHz and provide a high power gain of 52 dB at 600 W output power.

Furthermore, they are of rugged and reliable design offering long-life service. The LD7202 is fully compatible with TH3591B.

FEATURES

○ High Power Gain

The power gain is typically 52 dB at 600 W level.

○ Simple Cooling System

The tubes are forced-air-cooled, so that the cooling systems are greatly simplified.

○ PPM Focusing

All 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 suitable for use in digital communication service.