September 2013

DocID024845 Rev 1

1/10

AN4315

Application note

BAL-NRF02D3 matched balun with integrated harmonics filter for

Nordic Semiconductor chips with ultralow power transceivers

Introduction

The nRF51422-CEAA and nRF51822-CEAA from Nordic Semiconductor are 2.45 GHz

combo chips with an ultralow power transceiver.

The BAL-NRF02D3 from STMicroelectronics is an ultraminiature balun for which the

matching impedance has been customized for the nRF51422-CEAA, and nRF51822-CEAA

Nordic Semiconductor circuits.

The BAL-NRF02D3 integrates matching network and harmonics filters. It uses

STMicroelectronics’ IPD technology on non-conductive glass substrate which optimizes RF

performance.

The BAL-NRF02D3 has been tested and approved by Nordic Semiconductor on the

PCA10018 nRFgo module.The BAL-NRF02D3 demonstrates a higher system performance

compared to traditional solutions. This document presents the test and performance results.

www.st.com