Projects
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HF Receiver Mark I
My first attempt at building a decent classical analog shortwave receiver which covers 10 kHz to 30 MHz in a single band, and demodulates AM as well as SSB.
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HF Receiver Mark II
A much improved version of the Mark I shortwave receiver that again follows classical lines, now with a decent frontend, preselector, an FM demodulator, and with an improved user interface.
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Characterizing a SMA Calibration Kit
I obtained a cheap SMA calibration kit without correction coefficients, this is how I characterized it.
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TRL Calibration
Thru-Reflect-Line calibration of a VNA with the requisite calibration standards on a PCB, together with test fixtures to characterize components.
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Medium Power RF Amplifier
A medium power broadband RF Amplifier, mainly intended for laboratory use, with a frequency range from 10 MHz to 500 MHz, and capable of delivering an output power of about 1W.
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CW Signal Generators
Two simple single-board CW signal generators: One experimental one based on the Analog Devices ADF4351 IC, and an improved version based on the Texas Instruments LMX2582 IC, both with precise level control and harmonic filter.
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Another RF Signal Generator with LMX2582 and a DDS
An improved version of the signal generator based on the Texas Instruments LMX2582 IC, with a wider frequency range, better calibration facilities, and a faster MCU.
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An Active 10 GHz Frequency Tripler
A simple connectorized active frequency tripler module based on a Mini-Circuits part, with good fundamental suppression and low conversion loss.
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Noise Figure Measurements
The measurement of noise figure and gain of RF and microwave components with a spectrum analyzer and a noise source.