Carefusion 303, Inc.

David H Nicol

Brendan John Burgess

Michael Dugan Joyce

An electronics enclosure is disclosed that provides passive cooling of electronic components while reducing electromagnetic interference (EMI) emissions. The electronics enclosure includes an electronics assembly with at least one electronic component and a heat sink coupled to the electronics assembly. The heat sink has a base portion configured to thermally couple to the at least one electronic component when the heat sink is coupled to the electronic assembly. The electronics enclosure also includes a conductive enclosure forming an enclosed volume around the electronics assembly. The enclosure has a first opening configured to fit around the heat sink and at least one second opening. All non-conductive passages from the volume to the external environment have at least one cross-sectional opening having a continuous conductive perimeter with a maximum linear length within the opening of less than one quarter wavelength of a determined maximum shielding frequency.

Passive cooling and EMI shielding system

USB connector retainer

A modular electronics enclosure for reducing electromagnetic interference (EMI) is disclosed. The electronics assembly includes a first electronic component having an output, a second electronic component having an input with an input impedance, and a circuit matching element having an input coupled to the output of the first electronic component and an output coupled to the input of the second electronic component. The output of the circuit matching element is configured to provide an output impedance that matches the input impedance of the second electronic component. The electronics assembly also includes a conductive surface that forms a volume that encloses the first electronic component and the circuit matching element. All non-conductive passages from the volume to the external environment have at least one cross-sectional opening having a continuous conductive perimeter with a maximum linear length within the opening of less than one quarter wavelength of a maximum shielding frequency.

Growing community of inventors

Del Mar, CA, United States of America

David H Nicol