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Abstract:
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Wireless applications create special needs for mixers. Over the age, mixer technology has evolved from a major research topic into one of great maturity. Diode mixers are now well understood and diode mixers exhibiting excellent performance over multioctave bandwidths are commonly available at a lower cost. However, active mixers have special advantages in minimizing the complexity of a system or in reducing noise or intermodulation distortion.
The main aim of this project is to design a single stage active transistor mixer in RF frequency range. Circuit implementation and simulations were carried out in Agilent, ADS (Advance Design System). Various mixer design issues including the nonlinear behavior of transistors were covered and dealt with while designing the single stage transistor mixer. ADS simulations were carried out on Infineon BFP640 transistor and also on Infineon BFP620 transistor .Further, circuit implementation was carried out on board using the BFP620 transistor and measurements were done using available measurement hardware systems in the Microwave laboratory at California State University, Sacramento and at Centellax Inc , Santa Rosa |
