Enhancement on the robustness of a quad-band power amplifier module for GSM/GPRS handsets

Enhancement on the robustness of a quad-band power amplifier module for GSM/GPRS handsets

Device ruggedness is the major concern about the adoption of power amplifier module in the mobile phone industry. A resistive network was employed to stabilize the sub-harmonic (f/2) loop oscillation for the large periphery device, especially on the output stage. Not only the spurious emission being...

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Hauptverfasser: Janne-Wha Wu, Cheng-Chi Hu, Ying-Chou Shih, Ching-Wen Tang, Chung-Er Huang, Che-Wei Shen
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Diodes
GPRS
Ground penetrating radar
GSM
HBT
Impedance
Mismatch Susceptibility
Mobile handsets
Power Amplifier Module
Power amplifiers
Power control
Radio frequency
Robustness
Telephone sets
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Zusammenfassung:Device ruggedness is the major concern about the adoption of power amplifier module in the mobile phone industry. A resistive network was employed to stabilize the sub-harmonic (f/2) loop oscillation for the large periphery device, especially on the output stage. Not only the spurious emission being minimized, but also the robustness of power amplifier is strengthened as operating under severe mismatch condition (VSWR 10:1). Such power chips were integrated with a logarithmic power detecting controller and functioned as a linearly closed-loop power controlled GSM/GPRS power amplifier module. It had successfully demonstrated a highly mismatch susceptibility for all quad-band operations (GSM850, EGSM900, DCS1800, PCS1900).
ISSN:2165-4727
2165-4743
DOI:10.1109/APMC.2005.1607091