Abstract
This paper presents a multi-band multi-mode class-AB power amplifier, which utilizes continuously tunable input and output matching networks integrated in a low-loss silicon-on-glass technology. The tunable matching networks make use of very high Q varactor diodes (Q > 100 @ 2 GHz) in a low distortion anti-series configuration to achieve the desired source and load impedance tunability. A QUBIC4G (SiGe, f t = 50 GHz) high voltage breakdown transistor (V CBO = 14 V, V CEO > 3.6 V) is used as active device. The realized adaptive amplifier provides 13 dB gain, 27-28 dBm output power at the 900, 1800, 1900 and 2100 MHz bands. For the communication bands above 1 GHz optimum load adaptation is facilitated resulting in efficiencies between 30%-55% over a 10 dB output power control range. The total chip area (including matching networks) of the amplifier is 8 mm 2..
Original language | English |
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Article number | 1683908 |
Pages (from-to) | 2166-2176 |
Number of pages | 11 |
Journal | IEEE journal of solid-state circuits |
Volume | 41 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 Sep 2006 |
Externally published | Yes |
Keywords
- Adaptive matching network
- Dynamic leadline
- High efficiency
- Multi-band
- Multi-mode
- Power amplifier
- RF adaptivity