May 20, 2013

MWCL paper

  • Agnieszka
  • Dupuy J.
  • Johansen T.
  • Konczykowska J.
  • Nodjiadjim V.
  • Riet M.
  • Yan L.

In this letter, a millimeter-wave (mm-wave) twoway combined power amplifier (PA) is reported. It describes the first use of an interstage matching network for obtaining maximum output power from a cascode cell in the mm-wave frequency range. The PA has been fabricated in a high-speed InP double heterojunction bipolar transistor (DHBT) technology using three-finger devices. The cascode based PA has a total active emitter area of 68.4 µm2 and demonstrates a small signal gain of 9.8 dB and saturated output power of more than 18.6 dBm at 72 GHz. This corresponds to an output power density of 1.06 mW/µm2 . To the authors knowledge this represents the highest power density achieved for any InP HBT power amplifier in this frequency range.

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