Calculadora de Eficiencia de Amplificador de Potencia
Calcula la eficiencia de drenaje y eficiencia de adición de potencia (PAE) de amplificadores de potencia RF.
Fórmula
PAE = (Pout − Pin) / Pdc × 100%
Cómo Funciona
Power amplifier efficiency is a critical parameter in radio frequency (RF) electronic design, representing the ratio of output RF power to total input power consumed by the amplifier. In an ideal scenario, an amplifier would convert all input power to useful output power, but practical limitations mean some energy is always lost as heat. Class A, AB, and C amplifier designs have different efficiency characteristics, with Class B and Class C designs typically offering higher efficiency but potentially lower linearity.
Ejemplo Resuelto
Example: A power amplifier consuming 10W of DC power and producing 7W of RF output power. Efficiency calculation: η = (Output Power / Input Power) × 100% = (7W / 10W) × 100% = 70% efficiency. This demonstrates how engineers can quantify an amplifier's performance and energy conversion capabilities.
Consejos Prácticos
- ✓Always measure input and output power under consistent operating conditions
- ✓Consider temperature effects on amplifier efficiency
- ✓Use appropriate impedance matching for maximum power transfer
- ✓Select amplifier class based on specific application requirements
Errores Comunes
- ✗Neglecting thermal management and its impact on efficiency
- ✗Assuming linear relationship between input and output power across all operating conditions
- ✗Overlooking parasitic components that reduce actual efficiency
Preguntas Frecuentes
What is a good power amplifier efficiency?
Efficiency varies by amplifier class: Class A (25-35%), Class AB (50-70%), Class C (70-90%)
How does frequency affect power amplifier efficiency?
Higher frequencies typically introduce more losses due to parasitic elements, potentially reducing overall efficiency
What factors impact power amplifier efficiency?
Key factors include amplifier class, operating frequency, load impedance, bias conditions, and semiconductor technology
Shop Components
Affiliate links — we may earn a commission at no cost to you.
Related Calculators
RF
Link Budget
Calculate RF link budget: transmit power, free space path loss, antenna gains, and received signal level. Determine link margin and maximum range.
RF
dBm Converter
Convert dBm to watts, milliwatts, dBW, dBμV, and volts RMS. Essential RF power unit conversion tool for signal levels and link budgets.
RF
Cascaded NF
Calculate cascaded noise figure for a chain of RF stages using the Friis formula. Essential for LNA and receiver chain design.
RF
Microstrip Impedance
Calculate microstrip transmission line impedance using Hammerstad-Jensen equations. Get Z₀, effective dielectric constant, and propagation delay for PCB trace design.
RF
VSWR / Return Loss
Convert between VSWR, return loss, reflection coefficient, mismatch loss, and reflected/transmitted power percentage for RF impedance matching.
RF
Skin Depth
Calculate the skin depth (penetration depth) of electromagnetic fields in conductors as a function of frequency and material properties.