LD7202 NEC | Alldatasheet

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Document No. ET0141EJ2V1DS00 (2nd edition) Date Published August 1998 M Printed in Japan

14 GHz, 600 W CW, PPM FOCUSING, HIGH POWER GAIN

The information in this document is subject to change without notice. © 1989(1995) HIGH POWER TRAVELING WAVE TUBE FOR GROUND TERMINALS LD7202 SERIES For safe use of microwave tubes, refer to NEC document “Safety instructions to all personnel handling electron tubes” (ET0048EJ*V*UM00) 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

ª High Power Gain The power gain is typically 52 dB at 600 W level. ª Simple Cooling System The tubes are forced-air-cooled, so that the cooling systems are greatly simplified. ª PPM Focusing All the tubes are PPM (Periodic Permanent Magnet)-focused, eliminating entirely the focusing power supplies and interlock circuits. ª Rugged Construction The tubes are designed to be rugged, therefore they are suitable for transportable systems. ª Long Life and High Stability The tubes employ an advanced impregnated cathode with a low operating temperature for long life. ª 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.

ABSOLUTE RATINGS (Note 2, 3 and 4) ELECTRICAL Min. Max. Unit * The voltage between a helix and a collector must not exceed 8 kV. ** Load VSWR must be met as follows. MECHANICAL Min. Max. Unit

TYPICAL OPERATION (Note 4 and 5) Unit Frequency Heater Voltage Power Gain Gain Variation (at Po=70 W) AM-PM Conversion (two equal carriers, 70 W total) 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. Note 2 : The tube helix is at the ground potential in operation. Note 3 : All voltages except heater voltage are referred to the cathode potential except the heater voltage. Note 4 : The optimum operating parameters are shown on a test performance sheet for each tube. Note 5 : These characteristics and operating values may be changed as a result of additional information or prod- uct improvement. NEC should be consulted before using this information for equipment design. This data sheet should not be referred to a contractual specification.

LD7202, LD7202L, LD7202W OUTLINE DRAWING (Unit in mm) 4-M4 10- 6f6 AIR INLET RF INPUT TYPE SMA FEMALE RF OUTPUT MATES WITH UBR-120 FLANGE 110 MAX. 111 127 MAX.

83 AIR OUTLET4-M3

85 MAX. 166175 72170 MAX. 15710110110119 TERMINALS FOR M3 450 70+– 100 87 MAX. 86f Note. The thermal switch contacts are normally closed.

LD7202A OUTLINE DRAWING (Unit in mm) 4-M4 10- 6f6 AIR INLET RF INPUT TYPE SMA FEMALE RF OUTPUT MATES WITH UBR-120 FLANGE 110 MAX. 111 127 MAX. 85 MAX. 166175 72170 MAX. 15710110110119 AMP-861610-4 450 70+– 100 87 MAX. 86f CONNECTORS Note. The thermal switch contacts are normally closed.

LD7202B OUTLINE DRAWING (Unit in mm) 4-M4 10- 6f6 AIR INLET RF INPUT TYPE SMA FEMALE RF OUTPUT MATES WITH UBR-120 FLANGE 110 MAX. 111 127 MAX. 85 MAX. 166175 72170 MAX. 15710110110119 AMP861647-8 MULTI CONNECTOR 100 87 MAX. 86f Note. The thermal switch contacts are normally closed. 600 70+– PIN CONNECTION A HK TEMP-1 TEMP-2 HEL H COL AMP861647-8 CONNECTION

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.