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Voltage standing wave ratio (VSWR) (pronounced "vizwar" [1] [2]) is the ratio of maximum to minimum voltage on a transmission line . For example, a VSWR of 1.2 means a peak voltage 1.2 times the minimum voltage along that line, if the line is at least one half wavelength long.
For very low-power systems, such as mobile phones, signal strength is usually expressed in dB-microvolts per metre (dBμV/m) or in decibels above a reference level of one milliwatt . In broadcasting terminology, 1 mV/m is 1000 μV/m or 60 dBμ (often written dBu).
The phone's QVGA display measures 240 by 320 pixels, measuring 2.2 inches (56 mm) diagonally. The battery is rated for "up to 300 hours" on standby, and "up to 300 minutes" of talk time. [2] Samsung marketed the phone to teens [3] as "eco-friendly", being manufactured with recycled plastics and without beryllium and polyvinyl chloride. [4]
A mobile phone signal (also known as reception and service) is the signal strength (measured in dBm) received by a mobile phone from a cellular network (on the downlink). Depending on various factors, such as proximity to a tower , any obstructions such as buildings or trees, etc. this signal strength will vary.
The voltage standing wave ratio (VSWR) at a port, represented by the lower case 's', is a similar measure of port match to return loss but is a scalar linear quantity, the ratio of the standing wave maximum voltage to the standing wave minimum voltage.
The Samsung Galaxy J3 (2017) (also known as Galaxy J3 Pro) is an Android smartphone manufactured by Samsung Electronics and was released in June 2017. [1] Specifications
Samsung SGH-100 - first GSM phone sold with Samsung's logo and made by Dancall. The first GSM model carrying the Samsung logo was the SGH-100 made by European company Dancall (Denmark) in 1995. The first own GSM model was the SGH-200, which was made for European customers. But it was not as good as the company's CDMA phone.
The Samsung Galaxy J3 (2016) (also known as Galaxy J3 V, Galaxy J3 Pro, Galaxy Amp Prime, and Galaxy Express Prime) is an Android smartphone manufactured by Samsung Electronics and was released on May 6, 2016.
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