Analysis and design of wideband active power splitter with interleaf transmission line topology

Ching Ying Huang*, Robert Hu, Dow Chi Niu, Chi Yang Chang

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This article proposes a new wideband active power splitter design where the gain cells along the input transmission line are arranged in interleaf rather than the conventional parallel style, thus the circuit's high-frequency performance can be greatly improved. Both theoretical analysis and circuit simulation have been carried out; as a demonstration, parallel and interleaf active power splitters are designed using 0.1 μm GaAs pseudo-morphic heterostructure field effect transistors (GaAs pHEMT) process and measured on-wafer. The results clearly indicate the superiority of the interleaf topology. A 40 GHz interleaf active power splitter in 90 nm complementary metal-oxide-semiconductor (CMOS) is then presented where the magnitude and phase imbalance between the two output ports are 0.15 dB and 2.6° at 20 GHz, and 0.16 dB and 14° at 40 GHz. The output-port isolation is better than 30 dB across the whole frequency range.

    Original languageEnglish
    Pages (from-to)1262-1266
    Number of pages5
    JournalIET Circuits, Devices and Systems
    Volume13
    Issue number8
    DOIs
    StatePublished - 1 Nov 2019

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