LD4606A NEC | Alldatasheet
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Document No. ET0117EJ3V1DS00 (3rd edition) Date Published August 1998 M Printed in Japan
30 GHz, 380 W CW, HIGH EFFICIENCY , HIGH POWER GAIN
The information in this document is subject to change without notice. © 1989 HIGH POWER CW KLYSTRONAMPLIFIER FOR GROUND TERMINALS LD4606A 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 LD4606A is a five-cavity Klystron amplifier and ideal for use in the earth-to-satellite communications trans- mitter. This is designed for operating at 380 W CW power lev- els in the frequency range of 27.50 to 29.10 GHz. The in- stantaneous bandwidth of minus one-decibel is at least 70 MHz over the entire 1.6 GHz range. The tube is forced-air-cooled at the 380 W operation. Furthermore, this is of rugged and reliable design of- fering long-life service.
FEATURES
1 High Efficiency
The DC to RF conversion efficiency is typically 23 % by incorporating a 39 % depressed collector.
2 High Power Gain
The power gain is typically 40 dB at the 380 W level, so the driving power is less than 50 mW.
3 Simple Cooling System
The klystron is all forced air cooled with only one blower, so that the cooling systems are greatly sim- plified.
4 Permanent Magnet
The klystron is permanent magnet focused, eliminat- ing entirely the requirement for focusing power sup- plied and interlock circuits.
5 Rugged Construction
The klystron is designed to be rugged.
ABSOLUTE RATINGS ( Note 1, 2 and 3 ) ELECTRICAL Min. Max. Unit Load VSWR MECHANICAL Air Flow for Collector Body and Gun …………… 238 – kg/hr Ambient Temperature
TYPICAL OPERATION (Note 3, 4 and 5) Unit Air Flow of Collector, Body and Gun ……………………… 250 kg/hr Note 1 : Absolute rating should not be exceeded under continuous or transient conditions. A single absolute rating may be the limitation and simultaneous operation at more than one absolute rating may not be possible. Equipment design should limit voltage and environmental variations so that ratings will be exceeded. Note 2 : The Klystron body should be at ground potential in operation. Note 3 : All voltages are referred to the cathode potential except the heater voltage. Note 4 : The optimum operating value is shown on a test performance sheet for each tube. Note 5 : Characteristics and operating values on this Data Sheet are based on performance test. These values may be changed as a result of additional information or product improvement. NEC should be con- sulted before using this information for equipment design. This data sheet should not be referred to a contractual specification. No part of this document may be copied in any form or by any means without the prior written consent of NEC Corporation. NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from use of a device described herein or any other liability arising from use of such device. No license, either express, implied or otherwise, is granted under any patents, copy- rights or other intellectual property rights of NEC Corporation or of others.
LD4606A OUTLINE (Unit in mm) Air InletAir Outlet 270 MAX. TOP VIEW BOTTOM VIEW 370 MAX. 291.6 – 1.5 8542.5 148 – 1.5 152 1224- 12f 132 – 1.5 100 5th Cavity 3rd Cavity 4th Cavity 2nd Cavity RF Output (MATES WITH FUBR-260) RF INput (MATES WITH FUBR-260) 1st Cavity 270 MAX. 238.5 15.5 82.1 108.5 344 21.2 f 10587.4 Electrical Connection AMP (861647-8) Body AMP (861647-8) Receptacle PIN Connection Ground Heater Heater Cathode Collector SIDE VIEW