The following input impedance curves have been measured for a straight wire antenna as a function of frequency. The rectangular-shaded area on the left side graphs are magnified on the right side graphs to read the values clearly. (83) sowopody aduy 1200 900 600 300 0 -300 -600 -900 -1200 -Rin-Xin Rin=002 Vost | Xin-77062 1.6 -Rin=1070 2 Xin 01) 5 f(GHz) magnified Input Impedance (2) 200-Rin-Xin 150 100 50 0 -50 -100 -150 -20% Rin-1950 Rin 73 Xin – 871. Xin 062 V V. What is the VSWR, on a 500 transmission line feeding this antenna at (a) 0.3 GHz, (b) 0.9 GHz, (c) 1 GHz, and (d) 1.6 GHz? (GH₂)

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Antenna Characteristics

The antenna is an important concept in the domain of electronics and communication engineering. An antenna forms an integral part of many commonly used devices such as wireless modems, routers, game controllers, mobile phones, bluetooth devices, and so on. In simple terms, any wireless communication makes use of antennas to serve the purpose. An antenna, also known by the term 'arial', is an electrical device that converts electrical signals into electromagnetic waves or electromagnetic waves into electrical signals. An antenna contains a transmission line usually made up of co-axial cable, it then receives the signals and converts them into electromagnetic waves, which are then transmitted via space into their required destination. A communication system essentially makes use of two antennas, a transmission antenna, which converts electrical signals into electromagnetic waves, and a receiving antenna, which receives the electromagnetic waves and converts them back into electrical signals.