Published online by Cambridge University Press: 15 February 1999
In this paper, we propose a model for the LDMOS transistor used for poweramplification in the frequencies band 1.8–2.2 GHz dedicated to the mobiletelephony system Digital Cellular System (DCS). This model takes into account thebehaviour of each internal region of the power structure. A new representation of thenon-linear inter-electrode capacitances, drain-gate Cgd and drain-source Cds , is proposed. The obtained model is implemented in the circuit simulator PSPICE, whichgives an overall evaluation of the transistor performances in the radio frequencypower amplification mode. This model is Maynly intended to the system designer. Astudy of the power amplification in the SHF band at 2 GHz is performed. A goodagreement between experimental and simulation results is found.