Feature

New GTEM cell enables cost-effective EMC testing up to 18GHz

Link Microtek has introduced a new GTEM (gigahertz transverse electromagnetic) cell as a cost-effective alternative to an anechoic chamber for high-frequency EMC emissions and immunity testing.

08/03/2015 17:21:19

Primarily aimed at those needing to carry out pre-compliance testing of portable equipment, the new AM18-GTEM can handle microwave frequencies up to 18GHz, compared with a maximum of only about 500MHz for traditional TEM cells.

In essence, the GTEM cell consists of a tapered coaxial transmission line, with a flat inner conductor and an outer conductor formed by the aluminium walls. Producing a uniform magnetic field of known pattern and intensity, the fully shielded GTEM has a characteristic impedance of 50 ohms and is terminated by a combination of resistive card and free-space microwave absorbers.

It has a maximum input power of 50W and features an N-type input connector, as well as a screened side-access door to enable the equipment-under-test to be placed inside. The overall dimensions of the GTEM cell are 125 (L) x 65 (W) x 45 (H) cm.

Designed, manufactured and calibrated in-house by Link Microtek’s engineering team, the AM18-GTEM offers major space and cost savings, excellent long-term stability, and the capability for making rapid and reproducible EMC measurements.

Written By Sophia Bell

Sophia Bell is the Group Editor of DPA, Connectivity, and PBSI. She joined the team in 2020 as Assistant Editor after achieving a First-Class Honours BA in English Literature and Film Studies from the University of East Anglia. In her current role, she leads the editorial strategy, driving digital growth and ensuring each title continues to deliver trusted, relevant insight for engineering and manufacturing professionals.