EMI Filters for Telecom Industry


The Telecommunication industry is vastly expanding with new devices and equipment being deployed for both wired and wireless communication solutions. This makes managing the EMI immunity a great challenge. Signal transmitters and mobile towers also emit strong signals which cause EMI emissions. There is high impact of emissions on the human population and plant/animal life living in close proximity to telecom installations.


EMI/EMC effects concerning the telecom industry cover the following applications:

Central office equipment like signalling gateways, telephone exchanges, data centres

Care should be taken to prevent EMI from one component affecting each other. Typically, power supplies, air conditioners are some of the equipment that are collocated along with the telecom equipment in the central office.

Distributed equipment like BTS

They are placed in cell towers close to huge population centres. In crowded metropolitan cities, mobile towers are erected on top of residential apartment buildings that host up to a dozen BTS boxes from multiple service providers. Each of these BTS boxes have to be protected from EMI, both from other BTS and from natural sources like lightning.

Home communication equipment like wire-line and wireless routers

They have to be protected from EMI emanating from increasing number of electrical and electronic devices like mobile phones, microwave oven, induction stoves, and similar devices that are in close proximity with the telecom devices.

EMIS Offers

  • Compliance to standards

    Our solutions are known for their uncompromising technical compliance to standards

  • DSIR recognised R&D Lab

    EMIS houses sophisticated and fully equipped testing facilities at our EMI/EMC testing laboratory in Bangalore, India.

  • Inhouse testing facility or lab for EMC testing Certified

    Our test facility is accredited by Inhouse testing facility or lab for EMC testing - National Accreditation Board for Testing and Calibration Laboratories

  • ISO/IEC 17025:2017 Standard

    We also support on-site testing in compliance with international standards.

EMIS product portfolio for telecom applications

We have a wide range of input filters to reduce conducted and radiated EMI. Our product range also meets requirements concerning EMI susceptibility which support the entire frequency spectrum. We deliver associated products for adequate grounding, shielding and cabling to manage radiated emissions. Our facility filters comply with the highest international standards of conducted and radiated emission tests.

EMIS Filters and components range

Depending on the installation site and application, several components are available for EMI protection. EMIS has a wide range of high end filters for applications up to 15 GHz frequency range for telecom applications. These filters are available up to 2500 Amps rated current.

  • Single Phase Filters and 3 Phase (COTS) for harsh outdoor and ambient conditions
  • AC and DC EMI power line filters, and custom telecom EMI filters
  • IEC inlet filters to suppress undesirable electrical disturbances in power lines
  • Feed-through filters - manage high insertion loss from KHz to GHz frequencies for applications such as enclosures, mobile shelters, shielded enclosures, base stations and switching equipment.
  • Choke Coils, Grounding and Shielding material suitable for mobile towers, telephone exchanges and other equipment installations
  • Cabling and Routing solutions
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EMIS testing and consultancy services for telecom specifications

  • Expert engineering and consulting team provide support to design, plan, execute, inspect and verify EMI compliant systems. EMIS can help customers with their products to meet International EMI/EMC standard compliance by providing suitable solutions within a short time span.
  • Conducted Emission Test (Single phase up to 16A, 3 phase up to 63A) as per CISPR 11/BS EN55011 standards
  • Immunity Test as per standards
  • Radiated Emission Test (Open Area Test Site - 3M) as per CISPR 11/BS EN55011, IEC 61000-6-3, IEC 61000-6-4 standards
Check our comprehensive list of consultancy and test services on offer
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