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Radio Frequency, RF, Technology and Design
- concise guides, information, tutorials and data about radio frequency, RF, technology and RF design.
Types of radio modulation
There is a huge variety of different types of modulation or modulation techniques that can be used to superimpose information, either digital or analogue onto an RF signal.
- Overview of the different modulation techniques available
- What is amplitude modulation
- What is frequency modulation
- Phase modulation tutorial including PSK, MSK, GMSK, and QAM
Radio signal modulation formats
Although there is a large variety of different modulation techniques that can be used, different signal formats can be used along with these modulation techniques to enable radio signals to be used in differnet ways. Some of these techniques are given below:
RF mixing and mixers
RF mixing is one of the basic RF techniques. It is widely used in RF technology and is one of the cornerstones of RR design.
Frequency Synthesizers
Frequency synthesizers are widely used in radio receivers. Upon their performance depends many of the parameters of the whole receiver. Particularly important is the phase noise performance as this can limit the performance of a complete radio communications system.
- Phase locked loop tutorial
- Basic operation of an indirect (PLL) frequency synthesizer
- Phase detector
- PLL loop filter design
- Synthesizer PLL phase noise
- Direct digital synthesizer, DDs tutorial
- Low phase noise synthesizer design
- VCO phase noise
- VCO voltage controlled oscillator design
- Phase noise / phase jitter tutorial
Couplers, combiners and splitters
RF filters and RF filter design
VSWR and Return Loss
- Summary of Return loss and how it is used
- Chart / table relating return loss to VSWR and reflection co-efficient