Objective
The objective of this experiment is to demonstrate the operation of a planar inductor in RF (radio frequency) circuits and analyze its performance at high frequencies.
Components Required
- 1 x Planar Inductor (e.g., 10 µH)
- 1 x RF Signal Generator (e.g., 100 MHz)
- 1 x Oscilloscope
- 1 x Resistor (100Ω)
- 1 x Capacitor (e.g., 100 pF)
- Connecting Wires
- Breadboard (optional)
Theory
A planar inductor is a type of inductor that is typically constructed using a flat coil on a substrate, which is useful in high-frequency applications due to its low profile and reduced parasitic capacitance. This experiment will explore how the planar inductor behaves in RF circuits and its effect on impedance and signal integrity.
Circuit Diagram
Experimental Setup
1. Set up the circuit with the planar inductor, resistor, capacitor, and RF signal generator according to the provided circuit diagram.
2. Connect the oscilloscope probes to measure the voltage across the inductor and the load resistor.
Procedure
- Assemble the circuit as per the circuit diagram, ensuring all connections are secure.
- Set the RF signal generator to the desired frequency (e.g., 100 MHz).
- Turn on the signal generator and observe the waveform on the oscilloscope.
- Measure the voltage across the planar inductor and the load resistor using the oscilloscope.
- Record the peak voltage values and the waveform characteristics (e.g., frequency, amplitude).
- Vary the frequency of the RF signal generator and observe how the behavior of the circuit changes.
- Experiment with different values of the load resistor and capacitor to see their effects on the circuit's performance.
Results and Observations
Document the voltage readings and waveform shapes obtained during the experiment. Observe how changes in frequency and component values affect the performance of the planar inductor in the RF circuit.
Conclusion
This experiment demonstrates the functionality of a planar inductor in RF circuits. The results highlight the importance of inductors in tuning circuits and signal filtering at high frequencies, illustrating fundamental concepts in RF design and applications.