Abstract
A highly integrated up-converter MMIC is presented for low cost and high performance Ka-band transmitter module application. The multiple functions of the up-converter, such as local oscillator (LO) amplifler, single sideband subharmonic mixer, LO bandstop fllter, and three-stage RF amplifler, are integrated into a single chip. A proper circuit topology for the complete integrated circuit is selected to achieve the miniature chip size. The combination of lumped and microstrip lines are used to realize the compact sub- circuits. The layout of the circuit is optimized using electromagnetic (EM) simulations. The chip is fabricated in WIN 0.15m PHEMT technology on 4-mil GaAs substrate with a layout area of only 2:8mm £ 0:8mm (2.24mm 2 ). Measured conversion gain is 12 § 1dB over 28{37GHz for the LO pumping power of 0dBm. The sideband and 2£LO suppressions are above 20dBc. The 1dB gain compression output power (P-1dB) is 12dBm and LO to RF isolation is above 35dB.
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