PA + LNA == Power Amplifier + Low Noise Amplifier
What is LNA?
LNA stands for Low-Noise Amplifier.
📡 What It Does
An LNA is an amplifier that boosts very weak signals received by an antenna with minimal added noise.
🔍 Key Characteristics
| Feature | Description |
|---|---|
| Low noise figure | Adds very little noise to the signal, preserving quality. |
| High gain | Amplifies weak signals for further processing. |
| Used in RF front-ends | Common in radios, GPS, and satellite communication systems. |
🧠 Why It's Important
Weak incoming signals need to be amplified early in the signal chain. A low-noise amplifier ensures that the signal remains clear and usable by minimizing noise introduction.
📦 Common Applications
- Satellite receivers
- GPS antennas
- Mobile phones
- Radio telescopes
- SDR (Software Defined Radio)
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HMC564LC4 - IC GAAS LNA 7-14GHz
noise amplifier
qorvo-dat - QPL9504-dat - Ultra Low Noise, Flat Gain LNA
The QPL9504 is a flat gain, high-linearity, ultra-low noise amplifier in a small 2 x 2 mm surface-mount package. At 5.5 GHz, the amplifier provides 0.76 dB noise figure with 21.6 dB gain and +34 dBm OIP3 while drawing 55 mA bias current. The LNA can be biased from a single positive supply ranging from 3.3 to 5 volts. The device is housed in a green/RoHS-compliant industry-standard 2x2 mm DFN package.