Difference between revisions of "RF Signals"
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== Mixers == | == Mixers == | ||
| + | Mixers combine RF frequencies, either summing or subtracting them. Each mixer has 3 inputs | ||
| + | <ol> | ||
| + | <li> Local Oscillator Input (LO)</li> | ||
| + | <li> RF Port (RF)</li> | ||
| + | <li> Intermediate Frequency Port (IF)</li> | ||
| + | </ol> | ||
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Revision as of 12:09, 23 February 2016
RF (short for Radio Frequency) signals are sinusoidal waves with frequencies in the MHz and GHz range. While there are RF sources designed specifically for these frequencies, our good friend the Rigol Function Generator can produce frequencies in the lower end of the RF spectrum and should be sufficient for investigating RF signals.
For this module, you will need
- Rigol DG1022 Function Generator
- Rigol DS1102E Oscilloscope
- Micro-circuits ZAD-1 RF mixer
- A selection of BNC cables
- Thorlabs Variable Resistance Terminator
Contents
Measuring RF Power
Termination and Impedance Matching
Attenuation and Filtering
Splitters
Mixers
Mixers combine RF frequencies, either summing or subtracting them. Each mixer has 3 inputs
- Local Oscillator Input (LO)
- RF Port (RF)
- Intermediate Frequency Port (IF)
Switches
Mixer:
Subtraction:
Input 1: L
Input 2: R
Output : I=abs(L-R)
Addition:
Input 1: L
Input 2: I
Output: R=L+-I
Topics
- Measuring RF power
- Termination and impedance matching
- Attenuation and filtering
- Splitters, mixers, and switches
