World’s smallest width multi-RF board-to-board connector

Hirose has launched a multi-RF board-to-board connector that delivers a size reduction of up to 71% compared to conventional designs. With the industry’s smallest width of just 2.2mm, the BM56 Series supports multiple RF and digital signals with one board-to-board connector. By combining digital and RF signals into a single connector, the series provides a more effective use of the PCB and allows the development of smaller, lighter end-products. Also, the ultra-low-profile series can be placed on top of a device’s battery, providing more space savings and design flexibility.

With contacts designed for high-speed digital transmission and RF signal, the device supports a wide range of high-frequency applications, including 5G. The series supports RF signal transmissions (VSWR) DC to 5GHz: 1.3 Max, 5 to 10GHz: 1.4 Max, and 10 to 20GHz: 1.5 Max.

The connector has a double-shielded design that improves EMI protection. A fully armoured design that covers the ends of the housing with metal for enhanced robustness and a notable reduction in the risk of housing damage from misalignment when mating. A wide self-alignment range of ±0.3mm in the pitch direction and ±0.3mm in the width direction and guidance ribs supply smooth mating operation.

“Conventional connector solutions require one board-to-board connector and two RF connectors to achieve the capability of one BM56 Series connectors. These traditional designs do not leave much room for other components,” said Pete Lais, AVP of Product Management for Hirose Electric Americas. “The BM56 connector offers significant PCB space savings allowing OEMs to add a larger battery, add components to increase functionality, or simply miniaturize end-products.”

The board-to-board connectors employ a simple lock design to provide secure mating retention by incorporating an ultra-low profile with high contact reliability. The connector makes a clear tactile click when properly mated.

The FPC-to-board connector is typically used in smartphones, laptops, tablets, gaming consoles and wearable devices.