90-GHz CMOS phased-array transmitter integrated on LTCC

Ali Vahdati, Antti Lamminen, Mikko Varonen, Jussi Säily, Markku Lahti, Kari Kautio, Manu Lahdes, Dristy Parveg, Denizhan Karaca, Kari Halonen

    Research output: Contribution to journalArticleScientificpeer-review

    9 Citations (Scopus)


    This paper presents the design of a 90 GHz phased-array transmitter front end on low-temperature co-fired ceramic (LTCC) technology. The monolithic microwave integrated circuit components have been fabricated by the CMOS technology and flip chipped on the LTCC to realize the transmitter front end. The dc and differential hybrid IF signals are provided to the flip-chipped components through the bias and IF lines designed on the LTCC. An 1 × 4 patch antenna array has been designed for the transmitter and fabricated on the LTCC. The dc and IF signal pads on the LTCC were soldered to the designed printed circuit board pads for measurements. The measurement results show that by using a receiver horn antenna, the maximum received power at 92 GHz is-37.3 dBm at a communication distance of 1 m. The transmitter is capable of providing ±25° beam steering with respect to boresight and 20° half-power beamwidth at 90 GHz. The total power consumption of the transmitter front end is 656 mW.
    Original languageEnglish
    Article number8014513
    Pages (from-to)6363-6371
    JournalIEEE Transactions on Antennas and Propagation
    Issue number12
    Early online date2017
    Publication statusPublished - 1 Dec 2017
    MoE publication typeA1 Journal article-refereed


    • mixers
    • antenna measurements
    • phase shifters
    • gain
    • phased arrays
    • radio transmitters


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