The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Wireless sensor network (WSN) is commonly used for localization applications. Through sniffing receive signal strength indicator (RSSI) in WSN system, localization and connection to access point highest RSSI can be done automatically. In this paper, we propose Raspberry-Pi (RasPi), based best access point selection method utilizing RSSI metric. The RasPi brings the advantages of a personal computer...
A dual band planar inverted F antenna (PIFA) is designed and the performance is analyzed with the presence of mobile phone casing and the presence of human hand The proposed antenna has three main elements, the ground plane, radiating patch and a shorting plate. The PIFA is fabricated on FR4 substrate with dielectric constant of 4.5. The proposed antenna dimension is optimized to achieve a compact...
This paper presents a frequency reconfigurable rectangular patch antenna capable of operating at three frequencies. The reconfigurable mechanism of the antenna can be achieved by the implementation of radio frequency (RF) p-i-n junction (PIN) diodes across a T-slot developed on the feed line of the antenna. The antenna is designed using textile based material for wearable applications. The use of...
This paper presents the design and modeling of deformations of textile antenna wireless body area network (WBAN) applications. The performance of a compact planar flexible antenna is analyzed in terms of reflection coefficient and radiation pattern under bending and crumpling conditions. Unlike in the existing works, the bending condition in this work carried out in two different axes, x-axis and...
This paper describes the development of reconfigurable frequency microstrip patch textile antenna. This antenna is composed with a truncated edges rectangular patch incorporated with the slot structure at the ground. Three BAR PIN diodes switches are placed on the slotted ground plane. By controlling the state of the switches, such antenna is able to operate at different operating frequencies. Besides,...
This paper presents the design challenges that could be faced by radiation pattern reconfigurable antenna in the Gigahertz (GHz) frequencies. This is due to the close relationship between the antenna radiation mechanism to the insertion loss and isolation loss contributed by RF switch at ON and OFF state respectively. Apart from that, the size of the antenna at higher frequencies especially above...
Wireless sensor network (WSN) is commonly used for localization analysis. Through sniffing receive signal strength indication (RSSI) in WSN system, localization of higher RSSI is connected automatically. This paper proposes the Raspberry-Pi (RasPi) based sensor node to sniffing RSSI and automatically connect the device to strongest RSSI. The RasPi brings the advantages of a personal computer (PC)...
A wide-angle scanning reconfigurable beamsteering parasitic patch array antenna is introduced in this paper. For beam-steering antennas using microstrip, the beam scanning range is very limited where the typically achieved scanning is in the range of −30° to +30°. Increasing the parasitic elements does not provide significant improvement in terms of the beam scanning where only additional 3° to 5°...
A wide-angle scanning reconfigurable beamsteering parasitic patch array antenna is introduced in this paper. For beam-steering antennas using microstrip, the beam scanning range is very limited where the typically achieved scanning is in the range of −30° to +30°. Increasing the parasitic elements does not provide significant improvement in terms of the beam scanning where only additional 3° to 5°...
This paper presents 2×2 patch array antenna for 2.45 GHz industrial, scientific and medical (ISM) band application. In this design, four array radiating elements interconnected with a transmission line and excited by 50Ω subminiature (SMA). The proposed antenna structure is combined with a reflector in order to investigate the effect of air gap between radiating element and reflector in terms of reflection...
Awareness of the physical location of each node is required by the many wireless sensor network (WSN) applications. There are various tracking schemes available such as time-of-flight, time difference of arrival and angle of arrival. This review paper focuses and describes previous related work regarding of the angle of arrival (AOA) estimations in particular through received signal strength indication...
Adaptive beam steering antenna has been develop in this research. The proposed antenna is capable to steer the radiation pattern to phi of 0°, 45°, 135°, 225° and 315° angles and theta of 0°, 13°, 15°, 10° and 12°. This could be achieved with the suitable design antenna based on the patch yagi-uda antenna concept with a single radiator and four parasitic elements. Such four elements is control by...
This paper presents an analysis of a Left-Handed Circular Polarization (LHCP) wearable antenna with different textile material (substrates) for Global Positioning System (GPS) application. The proposed antennas have achieved circular polarization (CP) by truncating two opposite edged of the square patch for all designed antennas with three different substrates. The analysis is focusing on using felt,...
This paper presents a linearly polarized Yagi-Uda patch antenna deployed with rectangular parasitic elements. In this work, the effect of shorting location or switching location towards the performance of beam tilt angle and reflection coefficient is investigated. By varying the shorting location, the direction of a main beam can be tilted to various angles. However, since the beam patterns overlap...
A parasitic planar patch antenna capable of multidirectional pattern reconfiguration is presented. The integration of mutual coupling principle with the parasitic techniques has realized the pattern reconfigurable features. The antenna structure consists of a driven element surrounded by four parasitic elements act as reflectors and director depending on the switching schemes. All parasitic elements...
A pattern reconfigurable parasitic patch antenna using BAR and HPND PIN Diode is proposed. With parasitic element and mutual coupling technique, the presented antenna achieved beam switching at five phi of 0°, 45°, 135°, 225° and 315°. This is realized by four parasitic element surrounded a driven element. Each of the parasitic is shorted to the ground via a shorting pin. The ON and OFF state condition...
This paper investigates the effect of isolation loss (ISO) towards the beam steering capability of a parasitic patch array antenna. Parasitic patch antenna is mainly used to steer the main beam towards a desired direction and suppress the signal in unwanted directions. In such a scenario, the ability to steer the beam with reduced side lobe level is considered important to enhance the signal reception...
A switchable parasitic patch antenna that has a capability to operate in four beams of operation is proposed. The presented antenna is developed with a single main radiator at the center of the antenna structure surrounded by four parasitic elements. It has a full ground plane functioned as a reflector that helps to boost the gain up to 8dBi. Antenna reconfiguration is achieved with the implementation...
This paper presents a novel dual-polarization textile antenna (DPTA) for Global Positioning System (GPS) applications. In this design, four sector radiating elements are centrally-fed by a coaxial probe. A novel antenna structure is successfully achieved by integrating electronic components into a wearable textile antenna. Silver loaded epoxy adhesive is used in embedding four PIN diode switches on...
This paper presents a linearly polarized beam reconfigurable microstrip parasitic antenna deployed with rectangular parasitic elements. In this design, three variation of beam steering is controlled adopting two RF switches (currently copper pins for proof of concept). The effects of some parameter changes such as the spacing between parasitic element and center element and size of the parasitic element...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.