Impedance Matching Calculator
Calculate L-match, Pi-match, and T-match circuit components for optimal power transfer
Circuit Configuration
Matching Components
Operating Frequency: 100 MHz (100.00 MHz)
Source Impedance: 50 + j0 Ω
Load Impedance: 100 + j0 Ω
Calculated Q: 1.000
Impedance Analysis
Example Calculation
Pi-Match Example (110 MHz)
Source: 50 Ω + j0 Ω (typical generator)
Load: 150 Ω + j0 Ω (antenna impedance)
Frequency: 110 MHz
Q Factor: 2.5
Configuration: Highpass (Block DC)
Expected Results
Capacitance (C): ~18.95 pF
Source Inductance (Ls): ~60.78 nH
Load Inductance (Ll): ~86.81 nH
Circuit Types
L-Match
Simple two-component network
Best for moderate impedance ratios
Pi-Match
Three-component π-shaped network
Adjustable Q factor for bandwidth control
T-Match
Three-component T-shaped network
Good for wide impedance ranges
Matching Tips
Lower Q factor = wider bandwidth
Highpass blocks DC current flow
Lowpass allows DC current flow
Match complex conjugate for max power
Consider component tolerances
Understanding Impedance Matching
What is Impedance Matching?
Impedance matching is the practice of designing circuits to maximize power transfer and minimize signal reflection between a source and load. When impedances are matched, maximum power is transferred from the source to the load.
Why is it Important?
- •Maximizes power transfer efficiency
- •Minimizes signal reflections
- •Reduces standing wave ratio (SWR)
- •Improves system performance
Key Concepts
Complex Impedance
Z = R + jX
R = resistance, X = reactance
Maximum Power Transfer
ZL = ZS*
Load impedance = source impedance conjugate
Quality Factor (Q)
Q = X/R
Determines bandwidth and selectivity
Applications
RF Systems
- • Antenna matching
- • Amplifier coupling
- • Filter design
Audio Systems
- • Speaker matching
- • Microphone preamps
- • Line drivers
Power Systems
- • DC-DC converters
- • Solar panel optimization
- • Battery charging