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Wide-Band Thermopads®

The WTVA is EMC’s wide band temperature variable attenuator. This product provides a good linear shift from DC to 20 GHz and from -55 deg C to +125 deg C. EMC Technology’s Thermopads are microwave absorptive attenuators which provide power dissipation that varies with temperature. They are used to correct gain variations in amplifiers and other active components which tend to have gain anomalies over temperature. The WB2 style uses thick film gold wire bondable terminals. For RoHS compliant versions contact our factory. The WTVA is the preferred version of EMC’s Thermopad for use in satellite communications, broadband EW applications, and for high frequency and broadband amplifiers.


Size 1.52mm x 1.91mm [0.060in x 0.075in]
Impedance 50 Ohms
Frequency Range DC to 20 GHz
TCA Tolerance ±0.001 dB/dB/°C
VSWR (Typical) 1.25:1 Max DC-10 Ghz @ 25°C
1:70:1 Max 10-20 GHz @ 25
Power Rating 200 Milliwatts
Operating Temperature -55°C to 150°C
Substrate Alumina
Resistive Material Thick Film
Terminal Material Thick Film, Wire Bondable or Lead Free Finish