Amplifier Research 40T18G26A TWT Amplifier 18 GHz – 26.5 GHz 40W
Description
Amplifier Research 40T18G26A 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 40T18G26A 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. These sub-octave amplifiers feature moderate harmonic content.
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
Specifications
|
POWER (fundamental), CW, @ OUTPUT CONNECTOR |
|
|
Nominal |
45 watts |
|
Minimum |
40 watts |
|
Linear @ 1dB Compression |
10 watts minimum |
|
FLATNESS |
±8 dB maximum |
|
FREQUENCY RESPONSE |
18-26.5 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 |
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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. |
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VIDEO PULSE CAPABILITY (S2V OPTION) |
|
|
Pulse Width: |
0.1 microseconds min |
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Pulse Rate (PRF): |
10 kHz max |
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Duty Cycle: |
Some restrictions apply. Contact AR with application requirements. |
|
RF Rise and Fall: |
100 ns max (10% to 90%) |
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Delay: |
500 ns max from pulse input to RF 90% |
|
Pulse width distortion: |
200 ns max (50% points of output pulse width compared to 50% points of input pulse width) |
|
Noise Power Density, (pulse off): |
Minus 140 dBm/Hz (typical) |
|
Pulse Off Isolation: |
80 dB minimum, 90 dB typical |
|
Pulse Input: |
TTL Level, 50 Ohm nominal termination, high level enables RF when video pulsing mode is selected. |
|
NOISE POWER DENSITY |
Minus 60 dBm/Hz (maximum) Minus 65 dBm/Hz (typical) |
|
HARMONIC DISTORTION |
Minus 20 dBc maximum Minus 28 dBc typical |
|
PRIMARY POWER |
99-260 VAC 50/60 Hz single phase 850 VA maximum |
|
CONNECTORS |
|
|
RF input |
Type K female on rear panel |
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RF output |
Type WR-42 waveguide flange on rear panel |
|
RF output sample port |
Type K female on rear panel |
|
Pulse input (S2V option) |
Type BNC female or rear panel |
|
GPIB |
IEEE-488 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. |
