U.FL IPEX Pinout
A tiny board-level coaxial connector for internal antenna and RF module links.
Overview
U.FL (also sold as IPEX, AMC, or MHF) is an ultra-miniature snap-on coaxial connector used inside compact devices to link an RF module or chip antenna to a board, such as Wi-Fi/Bluetooth cards in laptops. It is a 50 ohm interface meant for low mating cycles.
As a coaxial connector it has two conductors: a center signal contact and a surrounding ground/shield ring that snaps onto the board-mounted receptacle. It is rated to roughly 6 GHz and typically connects to a pigtail cable feeding an external antenna.
Pinout
| Pin | Name | Function | Description |
|---|---|---|---|
| Center | Signal | SIGNAL | Center contact carrying the RF signal |
| Shield | Ground / Shield | GND | Outer snap-on ring, coax shield and ground return |
Notes
- 50 ohm, rated to ~6 GHz; designed for very few mating cycles (~30).
- Compatible families: IPEX, AMC, MHF1 (use a matching mate height).
Reference: Hirose U.FL series datasheet / Wikipedia — Hirose U.FL· verified 2026-06-27