DATA SHEET

Document No. ET0205EJ1V1DS00

Date Published August 1998 M

Printed in Japan

14 GHz, 123 W CW, CONDUCTION COOLING, MINIMUM SIZE

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

©

1996

HIGH POWER TRAVELING WAVE TUBE

FOR GROUND TERMINALS

LD7246A

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

handling electron tubes” (ET0048EJ

∗V∗UM00)

GENERAL DESCRIPTION

NEC LD7246A is PPM-focused traveling wave tube designed for use as final amplifier in the earth-to-satellite

communications transmitter.

This is capable of delivering an output power of 130 W over the range of 13.75 to 14.5 GHz.

It provides a high power gain of 53 dB at 123 W output power.

Furthermore, this is of rugged and reliable design offering long-life services.

FEATURES

™ Light weight, Compact and Efficient

The tube has dual-depressed collectors and is designed to operate at high efficiency across wide power

output range. It features state-of the art techniques to optimize size and efficiency.

™ High Power Gain

The power gain is typically 53 dB at 123 W level.

™ Simple Cooling System

The tube is conduction-cooled, so that the cooling system is greatly simplified.

™ PPM Focusing

The tube is PPM (Periodic Permanent Magnet) -focused, eliminating entirely focusing power supplies and inter-

lock circuits.

™ Rugged Construction

The tube is designed to be rugged, therefore it is suitable for transportable systems.

™ Long Life and High Stability

The tube employs an advanced impregnated cathode with a low operating temperature for long life.

™ Microdischarge Free

The tube is carefully designed to be free from microdischarge in the electron gun for long term operation,

therefore it is suitable for digital communication service.