RF/Microwave
Low Noise Pre-Amplifier Design
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Designed and modelled a LNA circuit in ADS that works over 5650 – 5925 MHz using CEL3512K2.
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Calculated the VGG, RD, and Rbias from given values of VDD and Id.
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Simulated the circuit over 2-18 GHz as we need to have unconditional stability over that range.
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Concluded that low noise figure and high gain together are practically not possible, and some compromise needs to be made.
Dielectric Resonator Oscillator (DRO) Design
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Designed and modelled a DRO using Infineon BFP 640 NPN Si-Ge device that provides steady state oscillation for 5.150 GHz +/- 500 kHz.
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Developed the harmonic evaluation schematic to perform OscTest, OscPort, and Phase Noise analysis for analyzing power.
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Resultant DRO has the minimum power of -10dBm with -20dBm adjacent harmonics.
Single balanced mixer Design
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Designed and modelled a rat-race mixer using RF Schottky diodes.
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Optimized the low pass filter, quad coupler, and mixer to meet the specifications.
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Performed harmonic balance analysis to obtain the conversion power less than 15dBm for LO at 5.150 GHz, and RF at 3.7 - 4.2 GHz which produced IF in range 950 - 1450 MHz.
Ham Radio
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Studied basics of Ham radio/walkie-talkie communication through frequency tuning
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Managed to get an insight into holding a license to use Amateur radio
