Split frequency high-voltage driver for dynamic load modulated RF amplifiers

Dynamic load modulation is a technique for increasing RF power amplifier efficiency by manipulating a tuneable matching network (TMN) between the RF transistor and the antenna in harmony with the envelope of the transmitted signal. Generally, TMNs are based on varactor diodes with control voltage sw...

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Bibliographic Details
Published in:Electronics letters 2016-02, Vol.52 (3), p.245-247
Main Authors: Watkins, G.T, Mimis, K
Format: Article
Language:English
Subjects:
3G mobile communication
3GPP
4G mobile communication
Amplifiers
antennas
bandwidth 3 MHz
Devices
dynamic load modulated RF amplifiers
Dynamic loads
Electric potential
Envelopes
Long Term Evolution
long‐term evolution envelope signal
Modulation
Networks
power 0.7 W
radiofrequency power amplifiers
RF power amplifier
RF transistor
split frequency architecture
split frequency high‐voltage driver
TMN
tuneable matching network
varactor diodes
varactor driver amplifier
varactors
Voltage
voltage 166 V
voltage dividers
voltage swings
Wireless communications
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Description
Summary:Dynamic load modulation is a technique for increasing RF power amplifier efficiency by manipulating a tuneable matching network (TMN) between the RF transistor and the antenna in harmony with the envelope of the transmitted signal. Generally, TMNs are based on varactor diodes with control voltage swings approaching 100 V, but future devices are likely to need far greater. The varactor driver amplifier proposed here uses a split frequency architecture to amplify a 3 MHz bandwidth 3GPP 4G long-term evolution envelope signal. Under these conditions, it can produce a peak voltage of 166 V at a power consumption of 0.7 W.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2015.3593