# GHz-Band Integrated Magnetic Inductors

## TL;DR

This paper presents optimized integrated magnetic inductors for GHz-range mobile electronics, achieving high performance with small size, high quality factors, and potential for future efficient power amplifier applications.

## Contribution

It introduces a novel design and fabrication approach for integrated magnetic inductors with record high-frequency performance in the GHz range.

## Key findings

- Achieved 1 nH inductance with peak quality factor of 4 at ~3 GHz
- Demonstrated best performance to date for integrated magnetic core inductors at high frequencies
- Showed potential for compact, efficient inductors in mobile electronics

## Abstract

The demand on mobile electronics to continue to shrink in size while increase in efficiency drives the demand on the internal passive components to do the same. Power amplifiers require inductors with small form factors, high quality factors, and high operating frequency in the single-digit GHz range. This work explores the use of magnetic materials to satisfy the needs of power amplifier inductor applications. This paper discusses the optimization choices regarding material selection, device design, and fabrication methodology. The inductors achieved here present the best performance to date for an integrated magnetic core inductor at high frequencies with a 1 nH inductance and peak quality factor of 4 at ~3 GHz. Such compact inductors show potential for efficiently meeting the need of mobile electronics in the future.