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2. Wireless device radiation and health - Wikipedia

   en.wikipedia.org/wiki/Wireless_device_radiation...

   The antennas contained in mobile phones, including smartphones, emit radiofrequency (RF) radiation (non-ionizing "radio waves" such as microwaves); the parts of the head or body nearest to the antenna can absorb this energy and convert it to heat or to synchronised molecular vibrations (the term 'heat', properly applies only to disordered molecular motion).

3. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   The combined antenna then operates tolerably well on at least twice as many frequencies as a simple antenna. Array antennas Array antennas are made out of combinations of several simple antennas that function as a single antenna; most compact but highly directional / "high gain" / beam antennas are some type of an array antenna Aperture antennas

4. Radio-frequency engineering - Wikipedia

   en.wikipedia.org/wiki/Radio-frequency_engineering

   Radio-frequency (RF) engineering is a subset of electrical engineering involving the application of transmission line, waveguide, antenna, radar, and electromagnetic field principles to the design and application of devices that produce or use signals within the radio band, the frequency range of about 20 kHz up to 300 GHz.

5. Cut the Cord! The 9 Best TV Antennas Let You Enjoy Free ... - AOL

   www.aol.com/lifestyle/cut-cord-9-best-tv...

   Buy: RCA Outdoor Yagi Satellite HD TV Antenna $54.04 (orig. $79.99) 32% OFF . 3. Best Buy Essentials Amplified Ultra-Thin Film Indoor HDTV Antenna

6. The Best Radio Frequency Detectors to Buy Right Now - AOL

   www.aol.com/news/best-radio-frequency-detectors...

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7. Fractal antenna - Wikipedia

   en.wikipedia.org/wiki/Fractal_antenna

   A fractal antenna is an antenna that uses a fractal, self-similar design to maximize the effective length, or increase the perimeter (on inside sections or the outer structure), of material that can receive or transmit electromagnetic radiation within a given total surface area or volume.

8. Li-Fi - Wikipedia

   en.wikipedia.org/wiki/Li-Fi

   Li-Fi modules. Li-Fi is a derivative of optical wireless communications (OWC) technology, which uses light from light-emitting diodes (LEDs) as a medium to deliver network, mobile, high-speed communication in a similar manner to Wi-Fi. [4]

9. Effective radiated power - Wikipedia

   en.wikipedia.org/wiki/Effective_radiated_power

   The latter factor is quantified by the antenna gain, which is the ratio of the signal strength radiated by an antenna in its direction of maximum radiation to that radiated by a standard antenna. For example, a 1,000 watt transmitter feeding an antenna with a gain of 4× (equiv. 6 dBi) will have the same signal strength in the direction of its ...