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Article: A high efficiency, HBT analog cellular power amplifier. (heterojunction bipolar transistor)(Cover Story)
- Article from:
- Microwave Journal
- Article date:
- January 1, 1996
CopyrightCOPYRIGHT 1996 Horizon House Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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With the introduction of digital cellular systems in North America and Europe, the analog phone manufacturers are becoming more competitive. Differentiating factors, such as talk time, standby time, size and especially cost, are driving new analog phone development. In this application, the components used in these phones must offer unprecedented performance and cost advantages. One component that has traditionally been either expensive, large, power hungry or any combination of these has been the RF power amplifier. This critical component governs much of the battery life, size, ease of implementation and manufacturability of the phone. For four-cell applications operating ...