Product Introduction

A copper wire air core coil, also known as an air core inductor, is directly wound from pure enameled copper wire without any magnetic core material. It relies solely on the air path within and around the coil to establish inductance. The construction can be either single-layer winding or multi-layer close winding. The through-hole configuration is commonly used, and the coil may be wound with or without a bobbin. It represents the most fundamental passive inductive component, featuring the simplest structure and excellent high-frequency performance.

Product Features

• No magnetic saturation – Since the coil is wound without a magnetic core, the inductance value exhibits minimal variation with changes in current.

• Excellent high-frequency characteristics – Due to the extremely low dielectric loss of air, it is well suited for RF and microwave circuits.

• Low DC resistance and high Q factor – Wound with enameled copper wire, resulting in low DC loss and a high quality factor (Q value).

• High design flexibility – Number of turns, wire diameter, inner diameter, number of layers, and winding method can all be fully customized.

Application Fields

Air core coils are mainly used in:

Bluetooth Smart Devices

High-frequency Signal Acquisition in Medical Equipment

Metal Detectors

Two-way Radios

FAQ

Q: What is the difference between an air core coil and a magnetic core inductor?

A: An air core coil has no magnetic core, offering excellent high-frequency performance, strong linearity, no saturation, and a high Q factor. However, its inductance value is low for a given volume.

A magnetic core inductor provides high inductance in a small volume and is suitable for low-frequency energy storage, but it suffers from high high-frequency losses and is prone to saturation.

Summary: Choose air core for high-frequency and RF applications; choose magnetic core inductors for low-frequency and high-current energy storage applications.