Description
| Parameter | Unit | Low-Range Interval | Mid-Range Interval | High-Range Interval | Typical Test Condition |
| Inductance (L) | nH/μH | 1 nH–100 nH | 100 nH–10 μH | 10 μH–100 μH | 1 MHz, 25°C |
| DC Resistance (DCR) | mΩ | 0.1–10 mΩ | 10–100 mΩ | 100–1,000 mΩ | 25°C, DC bias 0 |
| Rated Current (Ir) | A | 0.01–0.5 A | 0.5–3 A | 3–10 A | 25°C, ΔT ≤ 40°C |
| Quality Factor (Q) | – | 50–100 | 100–200 | 200–300+ | 100 MHz–1 GHz |
| Self-Resonant Frequency (SRF) | MHz | 100–500 MHz | 500 MHz–2 GHz | 2 GHz–10 GHz | No load, open circuit |
| Inductance Tolerance | % | ±10% (K) | ±5% (J) | ±1% (F) | Standard industrial grade |
| Operating Temperature | °C | -40°C to +85°C | -55°C to +125°C | -60°C to +155°C | Aerospace/industrial grade |
| Frequency Band | – | HF (3–30 MHz) | VHF (30–300 MHz) | UHF/SHF (300 MHz–10 GHz) | RF/microwave applications |
| Saturation Current (Isat) | A | 0.02–1 A | 1–5 A | 5–15 A | L drops by 10% |
| Parasitic Capacitance (Cp) | pF | 0.1–1 pF | 1–5 pF | 5–20 pF | High-frequency measurement |
Air-core coils are high-performance air-core inductors widely used in modern electronic circuits for energy storage, signal filtering and impedance matching. Compared with traditional ferrite-core inductors, an air-core coil eliminates magnetic saturation and hysteresis losses, providing excellent linearity, low loss and stable performance in high-frequency environments.
These high-frequency air-core coils are ideal for RF and communication systems, where stable inductance and high Q-value are essential. An RF air-core coil is commonly used in antennas, resonance circuits and impedance matching networks to ensure efficient signal transmission and minimal interference.
Air-core inductors are also widely applied in wireless charging coils, electromagnetic equipment and precision electronics. A wireless charging air-core coil provides efficient energy transfer and reliable inductive performance in wireless power systems. In addition, air-core filter coils and air-core choke coils are often used in signal filtering and noise suppression circuits.
Thanks to their flexible structure, air-core coils can be manufactured in many forms, including miniature air-core coils, SMD air-core coils, air-core solenoids and custom air-core coils designed for specific applications. These coils are frequently used in communication devices, induction equipment, trigger coils, electromagnetic systems and high-precision electronic instruments.
With advantages such as low loss, high Q-factor and excellent high-frequency performance, air-core induction coils are widely used in RF electronics, wireless power systems, antennas and other advanced electronic devices.