Browsing by Author "Wu, T. -H."

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5.2 GHz SiGe HBT upconverter using active-inductor LC current mirror
(2006-07-20)
Wu, T. -H.
;
Meng, C.
;
Wu, T. -H.
;
電信工程研究所
;
Institute of Communications Engineering
A compact 5.2 GHz upconversion micromixer using the 0.35 mu m SiGe HBT technology is demonstrated. A bandpass and area-saving LC current mirror using the active inductor is incorporated to increase the conversion gain. The demonstrated upconverter has conversion gain of -3.5 dB, OP(1dB) of -10 dBm, and O1P(3) of 0 dBm.
5.7 GHz GalnP/GaAs HBT sub-harmonic gilbert downconverter with octet-phase LO generator
(2006-09-14)
Wu, T. -H.
;
Meng, C.
;
Wu, T. -H.
;
電信工程研究所
;
Institute of Communications Engineering
A 5.7 GHz GaInP/GaAs heterojunction bipolar transistor (HBT) sub-harmonic Gilbert downconversion mixer with octet-phase LO generator is demonstrated. The conversion gain is 15 dB, IP1dB is - 13 dBm, IIP3 is 0 dBm, and IIP2 is 24 dBm when the LO power equals 3 dBm. The measured IF quadrature output waveforms indicate that the phase difference between the in-phase and quadrature-phase output channels is only 1.3 degrees.