Abstract
A compact reconfigurable antenna with an omnidirectional mode and four directional modes is proposed. The antenna has a main radiator and four parasitic elements printed on a dielectric substrate. By changing the status of diodes soldered on the parasitic elements, the proposed antenna can generate four directional radiation patterns and one omnidirectional radiation pattern. The main beam directions of the four directional modes are almost orthogonal and the four directional beams can jointly cover a 360° range in the horizontal plane, i.e., the main radiation plane of omnidirectional mode. The whole volume of the antenna and the control network is approximately 0.70 λ × 0.53 λ × 0.02 λ, where λ is the wavelength corresponding to the center frequency. The proposed antenna has a simple structure and small dimensions under the requirement that the directional radiation patterns can jointly cover the main radiation plane of the omnidirectional mode, therefore, it can be used in smart wireless sensor systems for different application scenarios.
Highlights
In a variety of modern systems with sensors, such as temperature detection systems [1], power transmission systems [2], microwave imaging systems [3], and microwave positioning systems [4], antennas play an important role
The configurable antennas used in smart sensor systems can be divided into two kinds, frequency-reconfigurable antennas (FRA) [15,16,17,18,19] and pattern-reconfigurable antennas (PRA) [20,21,22,23,24]
Copper signal lines with soldered the soldering of thethe proposed proposed antenna and polythene connected insulation to the direct current (DC) layers controlare source withon a voltage of 3 V pads to switch diodes (MA4AGBLP912, Macom Inc., Lowell, MA, USA [55])
Summary
In a variety of modern systems with sensors, such as temperature detection systems [1], power transmission systems [2], microwave imaging systems [3], and microwave positioning systems [4], antennas play an important role. Configurable antennas, as a part of smart wireless sensor networks (WSNs), have been extensively researched [7,8,9] and widely used in mobile devices [10], cancer detection sensors [11], self-healing sensors [12], and wearable sensors [13,14]. FRA can be applied to telemetry [16], motion detection [17], temperature monitoring [18,19], and so on. PRA can be applied to dynamic spectrum access [21], secondary user transmission [22], direction of arrival (DoA) and received signal strength (RSS) estimation [23,24], and so on
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
