Amplifier Research 50T4G18
TWT Microwave Amplifier, 4 - 18 GHz, 50W

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Product Overview

AMPLIFIER RESEARCH 50T4G18 TWT AMPLIFIER

The Amplifier Reearch 50T4G18A broadband traveling wave tube (TWT) Microwave Amplifier was designed for applications where wide instantaneous bandwidth, high gain and moderate power output are required. A reliable TWT provides a conservative 50 watts minimum at the amplifier output connector over most of the frequency range. Stated power specifications are at fundamental frequency.

The 50T4G18 amplifier's front panel digital display shows forward and reflected output plus extensive system status information accessed through a series of menus via soft keys. Status indicators include power on, warm-up, standby, operate, faults, excess reflected power warning and remote. Standard features include a built-in IEEE-488 (GPIB) interface, 0dBm input, VSWR protection, gain control, RF output sample port, auto sleep, plus monitoring of TWT helix current, cathode voltage, collector voltage, heater current, heater voltage, baseplate temperature and cabinet temperature. Modular design of the power supply and RF components allow for easy access and repair. Use of a switching mode power supply results in significant weight reduction.

Housed in a stylish contemporary cabinet this unit is designed for benchtop use but can be removed from the cabinet for rack mounting. The Model 50T4G18A provides readily available RF power for a variety of applications in Test and Measurement, (including EMC RF susceptibility testing), Industrial and University Research and Development, and Service applications.

Specifications of the AR 50T4G18 Amplifier include:

• POWER (fundamental), CW, @ OUTPUT CONNECTOR Nominal
• 60 watts Minimum.
• 50 watts
• Linear @ 1dB Compression:10 watts minimum
• FLATNESS: ±10 dB maximum, 4.2 - 18 GHz
• FREQUENCY RESPONSE: 4.2-18 GHz instantaneously
• INPUT FOR RATED OUTPUT: 1.0 milliwatt maximum
• GAIN (at maximum setting): 47 dB minimum
• GAIN ADJUSTMENT (continuous range): 35 dB minimum
• INPUT IMPEDANCE: 50 ohms, VSWR 2.0:1 maximum
• OUTPUT IMPEDANCE: 50 ohms, VSWR 2.5:1 typical
• MISMATCH TOLERANCE: Output power foldback protection at reflected power exceeding 20 watts. Will operate without damage or oscillation with any magnitude and phase of source and load impedance. May oscillate with unshielded open due to coupling to input. Should not be tested with connector off.
• MODULATION CAPABILITY: Will faithfully reproduce AM, FM, or pulse modulation appearing on the input signal. AM peak envelope power limited to specified power.
• NOISE POWER DENSITY:
• Minus 80 dBm/Hz (maximum)
• Minus 90 dBm/Hz (typical)
• HARMONIC DISTORTION (at 50 watts):
• 4.2-4.5 GHz; Plus 2.5 dBc maximum, Minus 0 dBc typical
• 4.5-6 GHz; Plus 0.5 dBc maximum, Minus 1 dBc typical
• 6-8 GHz; Minus 4 dBc maximum, Minus 6 dBc typical
• 8-10 GHz; Minus 6 dBc maximum, Minus 9 dBc typical
• Above 10 GHz; Minus 10 dBc maximum, Minus 15 dBc typical
• PRIMARY POWER: 99-260 VAC 50/60 Hz single phase, 800 VA maximum
• CONNECTORS
• RF input Type N precision female on rear panel
• RF output: Type N precision female on rear panel
• RF output sample port: Type N precision female on rear panel
• GPIB: IEEE-488-(f)
• Interlock: DB-15 female on rear panel
• COOLING: Forced air (self contained fans), air entry and exit in rear.
• SIZE (W x H x D): 19.8 x 6.5 x 27 in., 50.3 x 16.5 x 68.6 cm.
• WEIGHT (approximate): 70 lbs, 32 kg