14 GHz, 300 W CW, CONDUCTION COOLING,

HIGH POWER GAIN, FLAT GAIN VARIATION

DATA SHEET

Document No. ET0191EJ2V1DS00 (2nd edition)

Date Published August 1998 M

Printed in Japan

The information in this document is subject to change without notice.

©

1996

HIGH POWER TRAVELING WAVE TUBE

FOR GROUND TERMINALS

LD7213, LD7213L

For safe use of microwave tubes, refer to NEC document “Safety instructions to all personnel

handling electron tubes” (ET0048EJ

∗V∗UM00)

GENERAL DESCRIPTION

The NEC LD7213 and LD7213L are PPM-focused traveling wave-tubes designed for use as final amplifiers in the

earth-to-satellite communications 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 dB at 300 W output, and flat gain variation of 1.5 dB at any power level.

LD7213 is fully compatible with TH3759K.

FEATURES

™ High Power Gain

The power gain is typically 58 dB at small signal level and 55 dB 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 communication service.