Air core RF inductors feature a coreless air-wound design that completely eliminates core losses, delivering an ultra-high Q factor and exceptionally low high-frequency loss. This makes them ideal for narrowband RF amplifier matching, impedance matching networks, and tuning circuits in high-frequency applications.The inductors feature flat top and bottom surfaces for reliable automated surface-mount assembly. High-reliability versions are also available for demanding applications in the aerospace, defense, and other mission-critical industries.
Features
- Air-Core Construction
- Ultra-High Q Factor
- Wide Inductance Range:1.65 nH to 538 nH
- High Current Capability :up to 5.7 A
- Low-Profile Package: automated surface-mount assembly
- Wide Operating Temperature Range:40°C to +125°C
Applications
- RF amplifier matching networks
- RF tuning circuits
- Broadband filter networks
- RF decoupling circuits
- Aerospace & defense systems
- Wireless communication devices
Series in this family
| Product Series | Length(mm) | Height(mm) | Width(mm) | DCR Max(mΩ) | |
| SMAR toroidal coils | 2.21-10.55 | 1.37-5.90 | 1.42-6.35 | 1.1-90.0 | ✉ |
| SMAR0806 0807 0908 | 1.35-2.97 | 1.83-2.14 | 1.40-1.83 | 3.4-10.0 | ✉ |
| SMAR1111 | 2.67-3.30 | 2.67 | 2.79 | 8.1-11.3 | ✉ |
| SMAR1515 2222 2929 | 4.06-14.00 | 3.56-7.49 | 3.73-7.24 | 6.35-16.5 | ✉ |
FAQ
Q: What are the advantages of an air-core inductor over a magnetic-core inductor?
A: Air-core inductors eliminate core losses, resulting in a higher Q factor and lower high-frequency loss. They are ideal for RF amplifier matching networks, impedance matching, and narrowband tuning circuits. Their primary limitation is a relatively low inductance value, making them best suited for nanohenry (nH)-level applications.
Q: What is the difference between the SMAR0806 and SMAR1515 Series?
A: The SMAR0806, SMAR0807, and SMAR0908 Series offer an inductance range of 5.5 nH to 27.3 nH in compact package sizes, making them suitable for space-constrained RF designs. The SMAR1515 Series provides inductance values from 47 nH to 82 nH and achieves a Q factor of up to 230, making it ideal for high-performance RF applications that require superior efficiency and signal quality.
Q: What frequency range are air-core RF inductors designed for?
A: Air-core RF inductors are designed for high-frequency RF circuits, with typical operating frequencies ranging from tens of MHz to several GHz. The actual usable frequency depends on the inductance value and the self-resonant frequency (SRF) of the selected inductor.
Shinhom is dedicated to setting a high bar of excellence for industries that integrate or utilize magnetics technologies in our Air core RF inductors products.
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