Abstract
A low phase-shift temperature compensation attenuator has been successfully developed. Our invented circuit utilizes new variable-Q FET resonators. By using this configuration, the dynamic range of the attenuation can be arbitrarily determined and the phase shift with temperature change can be reduced. To verify this methodology, we have fabricated an MMIC attenuator, and the circuit has achieved the attenuation dynamic range of 16.9dB, the phase shift of ±5.2deg, and the minimum insertion loss of 4.5dB in X-band over 75 °C temperature variation.
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