DATA SHEET

Document No. ET0479EJ1V0DS00

Date Published September 1999 M

Printed in Japan

14 GHz, 750 W CW, CONDUCTION COOLING, HIGH POWER GAIN

HIGH POWER TRAVELING WAVE TUBE

FOR COMMUNICATIONS

LD7263

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

©

1999

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 LD7263 is a PPM-focused traveling wave tube designed for use as final amplifiers in the earth-to-

satellite communications transmitter.

This is capable of delivering an output power of 750 W over the range of 1 3.75 to 14.5 GHZ and provides a

power gain of more than 47 dB at 750 W Ievel.

Furthermore, this is of rugged and reliable design offering long-Iife service.

FEATURES

™ Lightweight, Compact and Efficient

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

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

™ Low Distortion

Distortion is a very important factor in multiplex digital signals transmission. NEC has developed techniques

for the correction of non-linear distortion and phase generated in a TWT. As a result, the TWT has an opti-

mum performance across a broad power range and is ideally suited for multi-carrier transmission systems.

™ Simple Cooling System

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

™ Rugged Construction

The power gain 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.

™ Micro-discharge 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.