Abstract
Based on the characteristic mode theory, a versatile radiation pattern reconfigurable antenna is proposed. The analysis starts from two parallel metallic plates with the same and different dimensions. By means of two PIN diodes, the size of one of the parallel metallic plates can be modified and consequently the behavior of the radiation pattern can be switched between bidirectional and unidirectional radiation patterns. Moreover, a SPDT switch is used to adjust the frequency and match the input impedance. The reconfigurable antenna prototype has been assembled and tested, and a good agreement between simulated and measured results is obtained at 2.5 GHz band which fits the IoT applications.
Highlights
As a fundamental part of a wireless system and due to the strong demand of the market for diverse applications, antennas are sometimes required to change their basic characteristics with respect to the application needs
E huge growth of Internet of ings (IoT) and smart industrial applications builds up many engineering and scientific challenges that involve ingenious research efforts from both academic and industrial society for the development of cost-effective, scalable, efficient, and reliable antenna systems for Internet of ings RA (IoT). is is why reconfigurable antennas (RAs) are conceived as a suitable system that can change its basic characteristics [6, 7] such as the operating frequency [8, 9], the radiation pattern [10, 11], or even the polarization [12, 13] to cope with the demand of several communication systems such as IoT sensors and mobile stations [14]
Reconfigurable Antenna Description. e proposed radiation pattern reconfigurable antenna is presented in Figure 8 and consists of a rectangular patch antenna printed on a Neltec substrate with a thickness H of 1.524 mm, εr 2.2, and tangent loss of 0.0009. e dimensions of the Characteristic Angle
Summary
As a fundamental part of a wireless system and due to the strong demand of the market for diverse applications, antennas are sometimes required to change their basic characteristics with respect to the application needs. En, a reconfigurable radiating structure using PIN diodes and a SPDT switch [22] is proposed.
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