Tektronix Encore

Amplifier Research 40T18G40
Microwave Amplifier, 18 - 40 GHz, 40W

Amplifiers - RF and Microwave >> Above 1 GHz and 1000 Watt or More >> Microwave Amplifier, 18 - 40 GHz, 40W
Rent Used Test Equipment
Manufacturer: Amplifier Research
Model: 40T18G40


Electronic Test and Measurement Equipment

Amplifier Research 40T18G40 Microwave Amplifier, 18 - 40 GHz, 40W Product Datasheet Download Product Datasheet

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Product Overview

Rent Amplifier Research 40T18G40 TWT Amplifier (Call for Availability):


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


Functions and Specifications of the Amplifier Research 40T18G40 TWT Amplifier Includes:



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 magni- tude and phase of

source and load impedance. May oscillate with unshielded

open due to coupling to in- put. 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.



Minus 60 dBm/Hz (maximum)

Minus 65 dBm/Hz (typical) 


HARMONIC DISTORTION: Minus 3 dBc typical (at 18 GHz)


PRIMARY POWER: 190-265 VAC single phase, 47/63 Hz, 1.0 KVA typical


COOLING: Forced air (self contained fans), air entry and exit in rear.


WEIGHT: 30 kg (65 lbs)


SIZE: 50.3x16.5x68.6cm(19.8x6.5x27in)



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