The Model 20T4G18A 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 micro TWT provides a conservative 20 watts minimum at the amplifier output connector. Stated power specifications are at fundamental frequency.

• POWER (fundamental), CW, @ OUTPUT CONNECTOR
• Nominal:   42 watts
• Minimum:   20 watts
• Linear @ 1dB Compression:   10 watts minimum
• FLATNESS
  • ±9 dB maximum, 4.2 - 18 GHz
  • ±5dB maximum, 8.0 - 18 GHz
• FREQUENCY RESPONSE:   4.2-18 GHz instantaneously
• INPUT FOR RATED OUTPUT:   1.0 milliwatt maximum
• GAIN (at maximum setting):   43 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 20 watts)
• 4.2-4.5GHz; Minus 0dBc maximum, Minus 1dBc typical
• 4.5-5GHz; Minus 1dBc maximum, Minus 2dBc typical
• 5-7GHz; Minus 2.5dBc maximum, Minus 4dBc typical
• 7- 10 GHz; Minus 5dBc maximum, Minus 9dBc typical
• 10 - 12 GHz; Minus 8dBc maximum, Minus 12dBc typical
• Above 12 GHz; Minus 20dBc maximum, Minus 30dBc typical
• PRIMARY POWER
• 99-260 VAC
• 50/60 Hz single phase,
• 600 VAC maximumn
• 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.
• WEIGHT (approximate):   32 kg, 70 lbs.
• SIZE (W x H x D):   50.3 x 16.5 x 68.6 cm, 19.8 x 6.5 x 27 in.