Title :
Design of a Linearly Assisted Switcher for a Supply Modulated RF Transmitter
Author :
Rahkonen, Timo ; Jokitalo, Olli-Pekka
Author_Institution :
Dept. of Electr. Eng., Oulu Univ.
Abstract :
A broadband modulated power supply for envelope tracking or polar RF transmitters has been built. To study the design constraints, an efficient state-based simulation tool was developed. Based on behavioral simulations, a prototype supply was built. It can deliver up to 1W (6V, 150 mA) to a resistive load of 30 ohms with spectral purity of ca. -45 dBc. The power efficiency using a QAM-signal is 49%
Keywords :
power amplifiers; power supply circuits; radio transmitters; 150 mA; 30 ohm; 6 V; QAM-signal; broadband modulated power supply; envelope tracking; linearly assisted switcher; polar RF transmitters; state-based simulation tool; supply modulated RF transmitter; Amplitude modulation; Broadband amplifiers; Circuit simulation; Impedance; Power amplifiers; Power supplies; Radio frequency; Radiofrequency amplifiers; Switches; Transmitters;
Conference_Titel :
Norchip Conference, 2006. 24th
Conference_Location :
Linkoping
Print_ISBN :
1-4244-0772-9
DOI :
10.1109/NORCHP.2006.329231
