# Rydberg atom quantum sensing enables high-accuracy Ku-band antenna gain measurement

Researchers used Rydberg atom quantum sensing to measure the gain of a Ku-band microwave antenna with exceptional precision. This new technique offers a more reliable, atom-based calibration standard that could replace traditional antenna measurement methods. The approach matters for improving microwave metrology in radar, communications, and applied physics.

**Importance:** 3/5

## Sources

### Science
- [Nature](https://www.nature.com/articles/s41598-026-66480-7) — 2026-08-12