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LD7215 の電気的特性と機能

LD7215のメーカーはNECです、この部品の機能は「6 GHz / 3 kW / HELIX TYPE / PPM FOCUSING / HIGH POWER GAIN / FLAT GAIN VARIATION」です。


製品の詳細 ( Datasheet PDF )

部品番号 LD7215
部品説明 6 GHz / 3 kW / HELIX TYPE / PPM FOCUSING / HIGH POWER GAIN / FLAT GAIN VARIATION
メーカ NEC
ロゴ NEC ロゴ 




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LD7215 Datasheet, LD7215 PDF,ピン配置, 機能
DATA SHEET
HIGH POWER TRAVELING WAVE TUBE
FOR GROUND TERMINALS
LD7215, LD7215C, LD7215D
6 GHz, 3 kW, HELIX TYPE, PPM FOCUSING,
HIGH POWER GAIN, FLAT GAIN VARIATION
GENERAL DESCRIPTION
The NEC LD7215, LD7215C and LD7215D are PPM-focused traveling wave tubes designed for use as the final
amplifiers in the earth-to-satellite communications transmitter.
These are capable of delivering an output of 3 kW over the range of 5.85 to 6.425 GHz.
They provide a high power gain of 46 dB at an output power of 3 kW, and flat gain variation of 2.5 dB by LD7215,
1.0 dB by LD7215C and LD7215D at small signal level in the full frequency range.
Furthermore, they are of rugged and reliable design offering long-life service.
Both LD7215 and LD7215D are fully compatible with TH3640.
FEATURES
High Power Gain
The power gain is typically 52 dB at small signal level and 46 dB at 3 kW Ievel.
Simple Cooling System
All the tubes are forced-air-cooled, so that the cooling system is greatly simplified.
PPM Focusing
The tubes are PPM (Periodic Permanent Magnet) focused, and eliminate entirely the requirement for focusing
power supplies and interlock circuits.
Long Life and High Stability
The tubes employ advanced impregnated cathode 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 use in digital communication service.
For safe use of microwave tubes, refer to NEC document “Safety instructions to all personnel
handling electron tubes” (ET0048EJVUM00)
The information in this document is subject to change without notice.
Document No. ET0139EJ5V0DS00 (5th edition)
Date Published August 1998 M
Printed in Japan
©
1991

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LD7215 pdf, ピン配列
LD7215, LD7215C, LD7215D
TYPICAL OPERATION (Note 1, 3 and 4)
Frequency ……………………………………………… 6.175
Heater Voltage (Note 5) ……………………………… 6.3
Heater Current ………………………………………… 3.9
Coilector Voltage ……………………………………… 8.25
Helix Voltage …………………………………………… 13.5
Accelerating Anode Voltage ………………………… 11.5
Collector Current ……………………………………… 1.35
Helix Current …………………………………………… 5
Accelerating Anode Current ………………………… 0.02
Power Gain
at Small Signal …………………………………… 52
at 3 kW Output …………………………………… 46
Gain Variation (at Small Signal) …………………… 2.5/1.0
Gain Slope (at Small Signal) ……………………… 0.02
AM-PM Conversion
at less than 500 W ………………………………… 2
at 3 kW Output …………………………………… 3.5
3rd Order Intermodulation ………………………… –27
(Two equal carriers, 250 W total)
Cooling Air Flow ……………………………………… 720
Air Pressure Drop …………………………………… 882.6
GHz
V
A
kV
kV
kV
A
mA
mA
dB
dB
dB (LD7215/LD7215C, LD7215D)
dB/MHz
°/dB
°/dB
dBc
kg/hr
Pa
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 body is at ground potential in operation.
Note 3 : All voltages 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
product improvement. NEC should be consulted before using this information for equipment
design. This data sheet should not be referred to a contractual specification.
3


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共有リンク

Link :


部品番号部品説明メーカ
LD7213

14 GHz / 300 W CW / CONDUCTION COOLING / HIGH POWER GAIN / FLAT GAIN VARIATION

NEC
NEC
LD7213L

14 GHz / 300 W CW / CONDUCTION COOLING / HIGH POWER GAIN / FLAT GAIN VARIATION

NEC
NEC
LD7215

6 GHz / 3 kW / HELIX TYPE / PPM FOCUSING / HIGH POWER GAIN / FLAT GAIN VARIATION

NEC
NEC
LD7215C

6 GHz / 3 kW / HELIX TYPE / PPM FOCUSING / HIGH POWER GAIN / FLAT GAIN VARIATION

NEC
NEC


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