Matjaz Vidmar

Microstrip Resonant Phase Shifters Matjaz Vidmar University of Ljubljana Slovenia There are several possible designs for adjustable phase shifters (or adjustable delay lines) depending on the operating frequency, required bandwidth, power handling and technology used (mechanical, ferrite, PIN diode, varactor or I/Q modulator). This article describes the particular problem...

A Wideband, Varactor-tuned Microstrip VCO Matjaz Vidmar University of Ljubljana Slovenia When electrical tuning of an oscillator is required over a wide microwave frequency range, yttrium iron garnet (YIG)-tuned oscillators usually provide the widest frequency coverage as well as relatively low phase noise. While YIG-tuned oscillators generally provide a...

A Microwave Analog Frequency Divider Matjaz Vidmar Nova Gorica, Slovenia Many analog frequency divider circuits were invented during the age of the vacuum tube. Some of these circuits even survived the germanium transistor age, but most were forgotten following the availability of inexpensive monolithic digital ICs such as flip-flops...