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The design and measured performance of wideband, high power GaN SPDT and SP3T MMIC switches in low-cost overmolded plastic package is presented. The switches operate in the 0.15–2.8 GHz band with class-leading CW input power handling of 50W, low insertion loss and excellent isolation. The reflective switches employ a series/shunt circuit architecture, fully integrated input and output matching using...
This paper discusses an approach taken to extract a virtual X-parameter (vX-parameter) model for a 500W L-Band internally matched device (IMD). X-parameters are essentially an open form of nonlinear data format that can be directly extracted from an NVNA and can be used in a circuit simulator as non-linear models. However, for very high power devices, the NVNA and its required peripheral components...
A systematic methodology for designing and implementing a broadband high-efficiency Class-E GaN power amplifier (PA) is proposed. The non-linear model of the GaN device is utilized to prescribe the optimal output impedance for broadband Class-E operation. The impedance of the output-matching network at the fundamental and harmonic frequencies is considered and optimized to cover broadband operation,...
Two high-efficiency Class E MMIC power amplifiers designed at 4 GHz using AlGaN/GaN HEMT technology are presented. The first circuit was designed using a 0.5 mm (4 × 125 μm) HEMT and when biased at 25 V drain bias it produced 61 % PAE, 33.8 dBm of output power and maximum gain of 14.8 dB. The second circuit used a 1 mm (8 × 125 μm) HEMT and at 30 V drain bias it produced 57% PAE, 36 dBm of output...
A new empirical large-signal model for high-power GaN HEMTs utilizing an improved drain current (Ids) model is presented. The new Ids formulation accurately predicts the asymmetric bell-shaped transconductance (gm) over a large drain-source bias range which is crucial in modeling high-power GaN HEMTs. A method of utilizing a combination of pulsed-gate (PGIV) and pulsed-gate-and-drain (PIV) IV measurements...
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