Radiation Characteristics of a Quarter-Wave Monopole Antenna above Virtual Ground

Khan, Niazul Islam; Azim, Anwarul; Islam, Shadli

doi:10.7763/jocet.2014.v2.151

Cited by 6 publications

(3 citation statements)

References 4 publications

(8 reference statements)

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“…Figure 3 reveals that the quarter wave monopole antenna is highly efficient. The results are in a good agreement with some reported observations [18][19][20][21]. Here, the measured voltage of the output signal can provide a good indication of the harvested energy and will coincide with the pattern of simulated power as shown in figure 3.…”

Section: Ylsupporting

confidence: 91%

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Theoretical and experimental investigations on optimization of the received power of a monopole antenna

et al. 2020

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Antenna is an essential component of telecommunication devices. Recently, the antenna has been used as a receiver in the rectenna solar cells as well as a vital component of cellular mobile telecommunications. The power of the received signal may depend on the physical shape of the monopole receiving antenna. The optimization of antenna's geometry is essential to improve the antenna performance as a receiver. It is widely accepted that the physical length of the monopole antenna; with one fourth of the incident wavelength; possesses an optimal efficiency. In the current study, a power equation based on a recently modified electromagnetic (EM) wave theory has been derived. The proposed formula has been used to calculate the optimum length of the monopole antenna to optimize the received power by the antenna. The angle between the direction of the antenna's plane corresponding to the direction of the propagation of the EM wave has been considered. some experimental investigations have been considered to confirm our theoretical investigations. In our experiment, the output voltage has been considered as a good indication of the harvested energy of the monopole antenna.

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Section: Ylsupporting

confidence: 91%

“…However, using such equation in different applications was found to be limited. Many researchers have used the quarter wave monopole antenna for their experimental and practical work [18][19][20][21]. Nevertheless, to the best of our knowledge, there is no power equation considering the antenna's length.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental investigations on optimization of the received power of a monopole antenna

et al. 2020

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“…2). This structure, a spiral inductance with wire length of λ/4 of the operational frequency with one signal terminal and one open-ended terminal, has less practical challenges than the hertz antenna in implementation and satisfies the requirements for low-frequency power and signal transmission in mid-range applications [18][19][20][21].…”

Section: Theory Ground Eliminated Systemmentioning

confidence: 96%

Impedance matching network for ground eliminated open‐ended resonant coil structure in distributed wireless power transmission systems

Zarifi

Moez

Mousavi

2017

IET Science, Measurement & Technology

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This paper reports a novel technique utilizing a standing-wave node as a virtual ground to implement an impedance matching network and power level tuning in a ground eliminated (GE) open-ended resonant coil structure. This technique with GE open-ended coils can potentially be used in wireless power transmission (WPT) systems, where an unknown metallic, ungrounded, arbitrary environment is used as a signal propagation medium to deliver electric power to several distributed nodes. To satisfy WPT standards the proposed resonant WPT system with the matching network is implemented and tested at 13.56 MHz. A comprehensive study of the GE open-ended resonant coil structure demonstrates ground plane effects and the necessity of an impedance matching network in no-ground signal situations. The experimental results confirm the theoretical analysis presenting 9 % improvements in mismatch efficiency, and 13.1 times in power transmission efficiency at 13.56 MHz when the matching network is deployed. Index Terms-matching network, virtual ground, ground eliminated open-ended coil, resonance inductive coupling, wireless power transmission, wireless sensor network. I. INTRODUCTION Wireless power transmission technology offers a wide range of industrial and biomedical applications and could lead to clean sources of electricity for a variety of users[1]. WPT involves the transmission of energy from a power source to an electrical load across an air gap, without electrical connectors such as wires. Among different WPT techniques, resonant inductive coupling (RIC) is more popular in mid-range (less than two times of coil's diameter size) applications since it has demonstrated higher efficiency in power transmission for long distances than the inductive or capacitive coupling ones[2]. In RIC methods, the transmitter (Tx) and receiver (Rx) coils are coupled in their resonant mode while the magnetic field between them transfers power from the Tx to Rx coil[2]-[6]. WPT has also demonstrated extensive potential in wireless sensor network (WSN) applications. WSNs have been used in industrial environments and demonstrate impressive performance in applications that require real-time, distributed, multiparameter measurements. WSN systems have also brought, flexibility, high performance and lower cost to sensing devices and systems[7]-[10]. Since WSN systems have distributed structures, supplying the electric power to the sensor nodes is a limiting factor. Using high capacitive batteries, the widespread primary solution, can provide the required electric energy but the power management required to achieve high sensor node performance is challenging and requires regular maintenance and battery replacement[11], [12]. WPT is an effective technique to deliver permanent electric power to WSN nodes while maintaining a wireless data communication link. The main challenge in WPT systems with distributed receiver loads is the physical distance between the power transmitter and the receiver node, where in large distances less power is received by receiv...

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An omnidirectional cylindrical DRA with a cone ground for WLAN applications

Liu

Yang

Gu³

et al. 2015

2015 IEEE Advanced Information Technology, Electronic and Automation Control Conference (IAEAC)

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Radiation Characteristics of a Quarter-Wave Monopole Antenna above Virtual Ground

Cited by 6 publications

References 4 publications

Theoretical and experimental investigations on optimization of the received power of a monopole antenna

Theoretical and experimental investigations on optimization of the received power of a monopole antenna

Impedance matching network for ground eliminated open‐ended resonant coil structure in distributed wireless power transmission systems

An omnidirectional cylindrical DRA with a cone ground for WLAN applications

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