RF Circuits
Dielectric Resonator Oscillator (DRO)
Posted on May 5, 2022
Low-phase noise oscillator composed of a dielectric puck with a resonance frequency of 4.5 GHz (botttom right) and a balanced amplifier (top). The oscillator can be locked to an external reference by applying the reference signal to the integrated analog phase-shifter (bottom left).
Read MoreGenerative Microwave Filter Design
Posted on September 19, 2021
Generative microwave filter design by using a particle swarm optimization to find a layout for a compact 4 GHz low-pass filter based on FEM simulations of the structure.
Read MoreNon-Linear Transmission Line (NLTL)
Posted on September 3, 2021
A non-linear transmission line composed of varactor diodes and inductors. The transmission line can be matched to 50 Ω by applying a DC-bais. Such a device can be used as a frequency comb generator, as a broadband microwave phase shifter, or to study non-linear physics phenomena.
Read MoreMeasurement Equipment
Phased-Array Radar System
Posted on March 23, 2020
A phased-array radar system operating at 6 GHz with one transmitter and two reciever channels. The radar modulation scheme is FMCW implemented with a custom PLL chip set. The processing of the radar signals is carried out on an Analog Devices ADSP-BF531.
Read MoreUSB Spectrumanalyzer
Posted on January 17, 2018
Simple USB Spectrumanalyzer for signals from 100 MHz to 6 GHz using an active mixer with an integrated wideband PLL and a Xilinx FPGA for digital Signal Processing.
Read MoreLaboratory Microwave Sources
The section below reports on the design of a low-cost programmable microwave sources with adjustable phase and power output. The circuits can provide microwave signals within the frequency range of 100 MHz to 6 GHz. The output power is adjustable from -35 dBm to +10 dBm. Two 50 Ω SMA outputs provide signals with a programmable phase shift from 0° to 360°. Additionally, the 180° shifted signals are available from two seperate SMA outputs. This makes the device perfectly suitable for various pulse sensing applications.Dual Microwave Source v2
Posted on July 09, 2017
Layout revision of the Dual Source v1, with a new microprocessor and an additional external clock input for PLL synchronization. Improved RF-shielding and design of an aluminium case.
Read MoreDual Microwave Source v1
Posted on April 28, 2017
This versions features two synced RF sources with programmable phase shift (0.01° resolution) and additional differential outputs. Each RF source can also be programmed independently in frequency and amplitude. The frequency range of the outputs is 100 MHz to 6 GHz.
Read MoreSingle Microwave Source
Posted on April 26, 2017
A simple low-cost programmable microwave source for signals from 100 MHz to 6 GHz. The output power is adjustable from -35 to 10 dBm and a on-board leveling is possible with a microwave power detector. Communication to a PC can be established over the USB port.
Read MoreSummary
This webpage reports on my personal electronic hardware design projects, which I have carried out in the past few years. Projects include microwave sources, RF measurement equipment, RF filters, radar systems, and many more ...