Simulating and Designing an RF Transmitter for Small Satellites
High Frequency Electronics
Mohamed Kameche, CNTS, and Samir Kameche,
This paper discusses the design and simulation of an RF transmitter for small satellites operating in the commercial S-band (2.2-2.29 GHz) with a data rate of 8 Mbps. In such systems, modeling frequency-dependent non-linear characteristics of complex analog blocks and subsystems is critical for enabling effi-cient verification of mixed-signal system designs. In order to provide efficient and accu-rate simulation for the transmitter circuits, simple macromodels for weakly nonlinear mixer and power amplifier are used in the sys-tem simulation. Also, we introduce noise into several circuits (frequency synthesizer, crystal oscillator, power amplifier, mixer, etc.), and we demonstrate their effect on the noise perfor-mance system. In the simulation we consider features of components and technologies com-mercially available.
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