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ARTICLES

Microstrip Resonant Phase Shifters

The design of a continuously adjustable delay for the STM64 (OC192)-specified 10 GHz clock frequency and its integer multiples and submultiples to control different electro-optical devices in optical-fiber line-terminal equipment
Matjaz Vidmar
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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...
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A Wideband, Varactor-tuned Microstrip VCO

The design of a varactor-tuned VCO covering an octave frequency range up to 4 GHz and more
Matjaz Vidmar
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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...
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A Microwave Analog Frequency Divider

A narrowband two-stage analog divide-by-four frequency divider that converts a 10 GHz input to 2.5 GHz
Matjaz Vidmar
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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...
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