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Since at least the 1990s, scientists have researched whether the now-ubiquitous radiation associated with mobile phone antennas or cell phone towers is affecting human health. [ 1] Mobile phone networks use various bands of RF radiation, some of which overlap with the microwave range. Other digital wireless systems, such as data communication ...
The Galaxy A55 5G has a triple rear camera setup, including a 50 MP Sony IMX906 wide-angle lens with an f/1.8 aperture, phase detection autofocus, and optical image stabilization; a 12 MP Sony IMX258 ultrawide-angle lens with an f/2.2 aperture and a 123° field of view; and a 5 MP macro lens with an f/2.4 aperture.
Wireless network technologies. In telecommunications, 5G is the fifth-generation technology standard for cellular networks, which cellular phone companies began deploying worldwide in 2019, and is the successor to 4G technology that provides connectivity to most current mobile phones. Like its predecessors, 5G networks are cellular networks, in ...
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
Frequency bands for 5G New Radio (5G NR), which is the air interface or radio access technology of the 5G mobile networks, are separated into two different frequency ranges. First there is Frequency Range 1 (FR1), [ 1] which includes sub-6 GHz frequency bands, some of which are traditionally used by previous standards, but has been extended to ...
The phone charges up to 45 watts with USB-C, 15 watts Qi wireless charging, and 5 watts reverse charging. It has a 4700 mAh battery. It has a 6.7-inch display. The screen has a 20:9 ratio and a density of 394 ppi. It has a weight of 201.2 grams (7.09 ounces). It has a Corning Gorilla Glass 5 screen, and Gorilla Glass on the back of the phone.
IEEE 802.11ac-2013. *Wi‑Fi 0, 1, 2, and 3 are named by retroactive inference. IEEE 802.11ac-2013 or 802.11ac is a wireless networking standard in the IEEE 802.11 set of protocols (which is part of the Wi-Fi networking family), providing high-throughput wireless local area networks (WLANs) on the 5 GHz band.
The Samsung Galaxy A51 is an Android smartphone manufactured by Samsung Electronics as part of its Galaxy A series.It was announced and released in December 2019. The phone has a Super AMOLED FHD+ 6.5in display, a 48MP wide, 12 MP ultrawide, 5MP depth, and 5MP macro camera, a 4000mAh battery, and an optical in-screen fingerprint sensor.