The search functionality is under construction.

IEICE TRANSACTIONS on Electronics

3-V Operation Power HBTs for Digital Cellular Phones

Chang-Woo KIM, Nobuyuki HAYAMA, Hideki TAKAHASHI, Yosuke MIYOSHI, Norio GOTO, Kazuhiko HONJO

  • Full Text Views

    0

  • Cite this

Summary :

AlGaAs/GaAs power HBTs for digital cellular phones have been developed. A three-dimensional thermal analysis taking the local-temperature dependence of the collector current into account was applied to the thermal design of the HBTs. The HBTs were fabricated using the hetero-guardring fully selfaligned transistor technique. The HBT with 220µm2 60 emitters produced a 31.7 dBm CW-output power and 46% poweradded efficiency with an adjacent channel leakage power of -49 dBc at the 50kHz offset bands for a 948 MHz π/4-shifted QPSK modulated signal at a low collector-emitter voltage of 3V. Through comparison with the conventional GaAs power FETs, it has been shown that AlGaAs/GaAs power HBTs have a great advantage in reducing the chip size.

Publication
IEICE TRANSACTIONS on Electronics Vol.E79-C No.5 pp.617-622
Publication Date
1996/05/25
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Issue on Microwave Devices for Mobile Communications)
Category
Active Devices

Authors

Keyword