This impedance is a merger of resistance and reactance thereby forming a complex value. This is known as the impedance of the antenna. So, if we have a transmitting antenna that is radiating some power then impedance Z will be present behind it. Here R represents the resistance of the input terminal of the antenna.įurther on considering the imaginary part, we will have We know that when a certain voltage is provided to any transmitting antenna then it generates current by following ohm’s law. Hence we can say that the impedance provided by the antenna at its input terminal is known as antenna impedance. Thus the antenna impedance at a point is also given as the ratio of electric field to the magnetic field at that particular point. So, it basically integrates the electric field and magnetic field in order to generate voltage and current so as to actuate electrical devices. While electromagnetic signal back to electrical one at the receiving end. It is designed to change electrical energy into the electromagnetic signals at the transmitting end. ![]() We have already discussed in our previous article that antennas are used in wireless communication in order to transmit the signal in the form of waves.
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