Abstract
A printed and minimal size antenna having the functionality of frequency shifting as well as pattern reconfigurability is presented in this work. The antenna proposed in this work consists of three switches. Switch 1 is a lumped switch that controls the operating bands of the antenna. Switch 2 and Switch 3 controls the beam switching of the antenna. When the Switch 1 is ON, the proposed antenna operates at 3.1 GHz and 6.8 GHz, covering the 2.5–4.2 GHz and 6.2–7.4 GHz bands, respectively. When Switch 1 is OFF, the antenna operates only at 3.1 GHz covering the 2.5–4.2 GHz band. The desired beam from the antenna can be obtained by adjusting the ON and OFF states of Switches 2 and 3. Unique beams can be obtained by different combination of ON and OFF states of the Switches 2 and 3. A gain greater than 3.7 dBi is obtained for all four cases.
Highlights
IntroductionWith the development of communication technology, there is considerable interest in reconfigurable antennas, mainly for their applications in various wireless communication systems
With the development of communication technology, there is considerable interest in reconfigurable antennas, mainly for their applications in various wireless communication systems.Their properties can be adjusted so as to achieve the desired frequency band, radiation direction or polarization
This paper provides a best solution for rapid development in communication systems configurations where the frequency and pattern of the system can be independently tuned
Summary
With the development of communication technology, there is considerable interest in reconfigurable antennas, mainly for their applications in various wireless communication systems Their properties can be adjusted so as to achieve the desired frequency band, radiation direction or polarization. A hooked-shaped, stub-loaded printed antenna with reconfigurable frequency for multiple applications was presented in [7]. The rapid development of communication systems demands configurations where the frequency and pattern of the system can be independently tuned Combining all these configurations in a single antenna is a major challenge. A slot antenna having the characteristics of frequency and the pattern reconfigurability using PIN diodes is reported in [18]. In [22], frequency and pattern reconfigurability are achieved using slits connected through PIN diodes with the main radiating part. While two lumped switches (Switch 2 and Switch 3) are deployed within the ground to produce pattern reconfigurability
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