Amplifier Research 40T18G40 TWT Amplifier 18 GHz – 40 GHz 40W

Description

Amplifier Research 40T18G40 is a self-contained, forced air cooled, broadband traveling wave tube (TWT) microwave amplifier designed for applications where wide instantaneous bandwidth, high gain and moderate power output are required. A reliable TWT provides a conservative 40 watts minimum at the amplifier output connector. Stated power specifications are at the fundamental frequency.

The 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, 0 dBm 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, the unit is designed for benchtop use but can be removed from the cabinet for rack mounting.

The Model 40T18G40 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.

 

Features

  • Broadband
  • Forced air cooled
  • Digital display
  • AM, FM or pulse modulation
  • IEEE-488 (GPIB) interface
  • VSWR protection
  • Gain control
  • 0 dBm input
  • RF output Sample ports
  • Auto sleep
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Specifications

POWER (fundamental), CW, @ OUTPUT CONNECTOR

Nominal

70 watts

Minimum

40 watts

Linear @ 1dB Compression

10 watts minimum

FLATNESS

±10 dB maximum

FREQUENCY RESPONSE

18-40 GHz instantaneously

INPUT FOR RATED OUTPUT

1.0 milliwatt maximum

GAIN (at maximum setting)

46 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 10 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 60 dBm/Hz (maximum)

Minus 65 dBm/Hz (typical)

HARMONIC DISTORTION

Minus 3 dBc typical (at 18 GHz)

PRIMARY POWER

190-265 VAC

40-63 Hz single phase

1 kVA typical

CONNECTORS

RF input

Type K female on rear panel

RF output

Type WRD-180 waveguide flange on rear panel

RF output sample port

Type K female on rear panel

GPIB

IEEE-488 (f) on rear panel

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)

50.3 x 16.5 x 68.6 cm, 19.8 x 6.5 x 27 in.

WEIGHT (approximate)

30 kg, 65 lbs.

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