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Miniature Ultra-Wideband Power Divider Using Bridged T-Coils

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2 Author(s)
Yo-Shen Lin ; Dept. of Electr. Eng., Nat. Central Univ., Chungli, Taiwan ; Jun-Hua Lee

In this work, a miniature ultra-wideband (UWB) power divider (PD) is proposed. By implementing the transmission lines of a two-stage Wilkinson PD using bridged T-coils, very compact size with no reduction in bandwidth can be achieved. Specifically, a proposed UWB two-way PD with a center frequency f0=5.5 GHz is implemented using the commercial GaAs pHEMT process. The circuit size without pads is only 1.45 mm × 0.84 mm, which is about 0.027λ0 × 0.016λ0 at f0. The fractional bandwidth for 15-dB input/output return loss and isolation is 110%, and the in-band insertion loss is within 1.3 ± 0.36 dB.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:22 ,  Issue: 8 )