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The Company
Corporate Information
- The official stuff. Find out facts, figures and other important information about Ericsson.
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Corporate Responsibility
- We take our role as a good corporate citizen seriously.Find out how we play an important role in the societies where we operate and how we are contributing to a sustainable future.
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Press
- Things are happening. Find out the latest by visiting our Press Room. Includes video reports and news articles.
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Thinking Ahead
Mobile broadband
- It’s already changing our world. So how do we make money from it?
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Sustainable cities
- It’s time to make urban development more sustainable.
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2020 Vision
- Picture a networked world; one full of possibilities. Can you see it?
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Your Business
Cut Costs, Create Cash
- It boils down to getting the most out of capital investments and operating costs, and generating more revenue. It's not rocket science. It's telecom.
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Transform Today
- Today's business challenges turn into opportunities when you have the right network. And a transformed network does more than transform business. It can transform your future.
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Make It Mobile
- When voice went mobile, it revolutionized business. Mobile broadband is doing the same for data, and that promises to revolutionize the world.
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Our Portfolio
Operator Solutions
- Evolve Communication Services
- Maximize Connectivity Business
- Monetize Data and Network Assets
- Improve Operation Efficiency
- Expand and Optimize Networks
- Expand into New Value Chains
- Network Areas
- Portfolio A-Z
Products
- Core Networks
- Network Management Products
- Radio Access Network
- Site Products
- Television Products
- Wireline Access
- Multimedia
- Cables and Interconnect Products
- Power Modules
- National Security & Public Safety Products
- Optical Networks
- Microwave Networks
- IP Networking
- Mobile Broadband Modules
Services
- Managed Services
- Systems Integration
- Customer Support
- Consulting
- Learning Services
- Network Roll-Out
View by customer type:
- Government
- Media Industry
- Utility Industry
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Careers
Job Openings
- Looking for a career with us? Find out more about our latest job openings and how to search and apply.
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Students & Young Professionals
- Check out our graduate programs and local career activities.
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Access Your Profile
- Already created a personal profile in our Job Search database? Click here to go straight to it.
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Radio waves and the frequency spectrum
What are radio waves?
Like all other radio communication applications, mobile telephony uses radio waves to carry the information, like voice, text and images, through the air. Radio waves are a kind of electromagnetic fields (EMF) that are also called radio frequency fields or radio frequency energy.
Radio waves travel with the speed of light. They consist of an electric and a magnetic component, which vary periodically in time. The number of oscillations per second is called the frequency. Different types of electromagnetic fields have different frequencies. Visible light, for instance, has higher frequencies than radio waves, but lower than ultraviolet light.
Electromagnetic waves with frequencies higher than ultraviolet light are called ionizing radiation, which has sufficient energy to break molecular bonds and thereby the potential to cause damage to biological tissue. X-rays and gamma rays are examples of ionizing radiation. Radio waves belong to the lower frequency part of the electromagnetic spectrum, which is called non-ionizing radiation. Here the electromagnetic energy is too low to break molecular bonds.
