Title :
A 27 dBm microwave amplifier with varactors-controlled matching networks
Author :
Rosolowski, Dawid W. ; Wojtasiak, Wojciech ; Gryglewski, Daniel
Author_Institution :
Inst. of Radioelectron., Warsaw Univ. of Technol., Warsaw, Poland
Abstract :
In this paper design and development of 27dBm medium-power amplifier with varactor-based input/output matching networks is presented. The frequency tunable range of 1.3GHz to 2.6GHz was obtained for input matching |Γ| ≤ 0.3 and power gain higher then 13dBm. Adaptive impedance matching networks provide frequency adjustment and output power level optimization by means of two voltages control. The amplifier was fabricated using surface mounted technology and conventional low-cost GaAs transistor and hyperabrupt varactors. Main parameters of the implemented amplifier with nonlinear behaviour of varactors are investigated. The device can be applied to operation with constant envelope multi-standard and multi-band radio-communication systems.
Keywords :
Adaptive control; Adaptive systems; Frequency; Impedance matching; Microwave amplifiers; Power amplifiers; Power generation; Programmable control; Radiofrequency amplifiers; Varactors; Adaptive amplifiers (APAs); RF adaptivity; components for Software Defined Radio; multi-band / multi-mode devices; tunable matching networks;
Conference_Titel :
Microwave Radar and Wireless Communications (MIKON), 2010 18th International Conference on
Conference_Location :
Vilnius, Lithuania
Print_ISBN :
978-1-4244-5288-0
