Abstract
In this paper, an electrically small, planar antenna with broad side radiation pattern is presented. The design contains a dipole and a segmented circular loop which works equivalent to that of a magnetic dipole. A circular patch with slots is used to provide impedance matching. In general, electrically small antennas suffer from narrow bandwidth. In this paper, the reconfigurability of the small antenna for two different applications, 1.5GHz and 2.4GHz, is discussed. This reconfigurability was achieved by using a BAR 64-03W pin diode to adjust the resonant frequency. Two reconfigurable frequency bands were achieved at 1.5GHz and 2.4GHz with broad side radiation patterns.
Highlights
The components used in wireless communication systems such as antennas, filters, multiplexers, modulators, etc. are continuously miniaturized and intelligentized [1,2,3]
The electrical and magnetic dipoles are excited in a perpendicular manner in order to design this planar, electrically small antenna
The top layer of the antenna is fabricated with a strip line and it is fed by an edge feed acting as an electric dipole
Summary
The components used in wireless communication systems such as antennas, filters, multiplexers, modulators, etc. are continuously miniaturized and intelligentized [1,2,3]. Frequency reconfigurable electrically small antennas are often suitable and are used for compact, wearable devices [4, 5]. In order to obtain a unidirectional radiation pattern which increases the antenna size, a broad ground plane is required. To produce the magnetic dipole that is combined with the rectangular bar electric dipole to obtain the end fire radiation pattern, a segmented circular loop is used. This antenna is 35mm×35mm×1.6mm in size and has a single coating. Two resonant bands were obtained at 1.5 and 2.4GHz and the end fire radiation pattern was maintained This antenna was fabricated in order to obtain a practical realization of the results. A good agreement between the simulated and the experimental results was obtained
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