scholarly journals A Compact Wideband Printed Antenna for 4G/5G/WLAN Wireless Applications

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Ming Yang ◽  
Yufa Sun ◽  
Fan Li
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Communication Systems ◽  
Coaxial Cable ◽  
Total Radiation ◽  
Printed Antenna ◽  
Complete Structure ◽  
Wireless Applications ◽  
Wide Operating ◽  
Good Agreement

A compact wideband printed antenna with deca-band 4G/5G/WLAN for mobile phone devices is proposed in this paper. The complete structure is composed of a monopole antenna and a coupling strip, occupying a small C-shape PCB area of 27 × 10.8 mm2. This antenna, which is printed on FR4 substrate with 0.8 mm thickness and fed by a coaxial cable, can provide three wide operating bandwidths that cover 685–1012 MHz, 1596–2837 MHz, and 3288–3613 MHz for 4G/5G/WLAN communication systems. The gains and total radiation efficiencies of the antenna in the low, middle, and high bands are 1.4 dBi–2.5 dBi and 38%–47%, respectively. Besides, the measured results are in good agreement with the simulated results. Further experiments demonstrate that the proposed antenna exhibits a good performance for mobile phones.

scholarly journals Pattern Reconfigurable Antenna for VANET, Wi-Fi, and WiMAX Wireless Communication Systems

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Rahmani Faouzi ◽  
Amar Touhami Naima ◽  
BelbachirKchairi Abdelmounaim ◽  
Aknin Noura ◽  
Taher Nihade
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Equivalent Circuit Model ◽  
Coaxial Cable ◽  
Wireless Communication Systems ◽  
Reconfigurable Antenna ◽  
Antenna Characteristic ◽  
Beam Switching ◽  
Theoretical Results ◽  
Good Agreement

This work presents the design and analysis of a beam switching antenna for VANET, Wi-Fi, and WiMAX wireless communication systems. The proposed reconfigurable antenna is powered by a coaxial cable and consists of a circular patch, six fish-shaped radiating elements, and a circular planar ground. The antenna was constructed on a Rogers RT5880 substrate. Its dimensions are as follows: 0.81λ0 × 0.81λ0 × 0.03λ0. It performs six reconfigurable operating states, at the same frequency, by controlling the activation and deactivation of six PIN diodes to change the beam’s direction. A theoretical equivalent circuit model of the antenna is extracted. A progressive analysis of improving the antenna characteristic performances is provided. The bandwidth of the proposed antenna is 9.07% (measured), 9.62% (simulated), and 9.31% (theoretical). The designed antenna has a maximum gain of 9.57 dB for all pattern states and a superior efficiency ratio from 85% to 95% over the operating range (5.54 GHz–6.10 GHz). The proposed reconfigurable antenna is fabricated. Measured, simulated, and theoretical results are given and show good agreement, including reflection coefficient (S11) and radiation patterns.

Compact Printed Antenna for Mobile Phone

2013 ◽  
Vol 811 ◽  
pp. 331-334
Author(s):  
Tsang Yen Hsieh ◽  
Jyh Liang Wang ◽  
Chuan Chou Hwang ◽  
Wei Chuan Chen
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Return Loss ◽  
Radiation Patterns ◽  
Printed Antenna ◽  
Mobile Phone Application ◽  
Outer Strip ◽  
Service Bands

A small-size printed antenna is proposed for the application of mobile phones. The antennacomprisesan outer strip, an inner strip, and a common section.It not only occupies a compact area of 25 × 20 mm² butalsosupports two wide bandswithinthe resonantmodes. Prototypes of the antenna had been constructed and experimentally verified. The measured results of the antenna show the bandwidth cover the existing service bands of GSM/DCS/PCS/UMTS within 6 dB return loss specification, and also have good radiation patterns and antenna gains.This antenna is well suitable to be used for mobile phone application.

Quintuple band circular monopole antenna with innovative 3-D printed PLA substrate for wireless applications

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ashraf E. Ahmed ◽  
Wael A.E. Ali ◽  
Sudipta Das
Keyword(s):  
Polylactic Acid ◽  
Monopole Antenna ◽  
Design Concept ◽  
Experimental Results ◽  
Printed Antenna ◽  
Wireless Applications ◽  
Innovative Technique ◽  
Compact Size ◽  
Simulation Results ◽  
Good Agreement

Abstract In this paper, a circular antenna with a 3-D printed substrate is introduced to achieve a multiband behavior. The circular antenna is matched using a key-shaped stub located on the perimeter of the designed antenna. The 3-DP circular antenna adopted the apollonian gasket technique to perform the multi-circular cuttings in the Polylactic Acid (PLA) substrate as an innovative technique to obtain quintuple bands. The proposed antenna is designed to operate for Bluetooth, WLAN, WiMAX, and other wireless applications in S-band and C-band. The designed antenna has a compact size of 61.1 × 43.6 × 1 mm3. The prototype of the suggested 3-D printed antenna is fabricated and measured to confirm the simulation results. A good agreement is evident between simulation and experimental results which validates the design concept.

scholarly journals Circularly Polarized Broadband Printed Antenna for Wireless Applications

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4261 ◽  
Author(s):  
Md. Samsuzzaman ◽  
Mohammad Islam
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Ground Plane ◽  
Axial Ratio ◽  
Wireless Communication Systems ◽  
Impedance Bandwidth ◽  
Printed Antenna ◽  
Circularly Polarized ◽  
Wireless Applications ◽  
Design Structure

A simple, compact sickle-shaped printed antenna with a slotted ground plane is designed and developed for broadband circularly polarized (CP) radiation. The sickle-shaped radiator with a tapered feed line and circular slotted square ground plane are utilized to realize the wideband CP radiation feature. With optimized dimensions of 0.29λ × 0.29λ × 0.012λ at 2.22 GHz frequency for the realized antenna parameters, the measured results display that the antenna has a 10 dB impedance bandwidth of 7.70 GHz (126.85%; 2.22–9.92 GHz) and a 3 dB axial ratio (AR) bandwidth of 2.64 GHz (73.33%; 2.28–4.92 GHz). The measurement agrees well with simulation, which proves an excellent circularly polarized property. For verification, the mechanism of band improvement and circular polarization are presented, and the parametric study is carried out. Since, the proposed antenna is a simple design structure with broad impedance and AR bandwidth, which is a desirable feature as a candidate for various wireless communication systems. Because of the easy printed structure and scaling the dimension with broadband CP characteristics, the realized antenna does incorporate in a number of CP wireless communication applications.

scholarly journals Evaluation of Electromagnetic Radiation level in the Outdoor from Wireless Transmission Systems in Northern West Bank – Palestine

2021 ◽  
Vol 9 (1) ◽  
pp. 01-09
Author(s):  
Mutamed Khatib
Keyword(s):  
Electromagnetic Radiation ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Communication Systems ◽  
West Bank ◽  
Base Stations ◽  
World Health ◽  
Area Network ◽  
Different Sources ◽  
Local Radio

Exposure to electromagnetic fields is a major public concern due to the possible hazardous effects on health caused by exposure to these radiations. The aims of this study were to measure radiofrequency radiation levels from different wireless systems and to compare the results with the recommended limits by the World Health Organization (WHO) which should be less that 450 µw/cm2. The study was a cross-sectional study that was conducted in different cities and villages from the northern governorates in the West Bank; Jenin, Tulkarm, Nablus, Qalqilya, Tubas and Salfit. To measure the radiation levels ranging from 80 MHz to 2 GHz, a Portable Field Strength Meter with the suitable set of antennas was used. This frequency range covers the radiations from different sources as mobile phone base stations, local radio and television stations, mobile phones, Wireless Local Area Network, Bluetooth, wireless computer periphery and even microwave ovens. Points close to mobile phone base stations and local radio and television stations in addition to randomly selected points were included. The scanning process for each point was done twice and the higher reading was included in the analysis. The results were compared to the recommended limits of radiations by WHO. Also, a questionnaire was distributed to evaluate people knowledge and perception regarding radiations. A total of 2000 readings were obtained with a mean ± SD = 0.25 ± 0.214 µw/cm2. The highest reading was 1.91 µw/cm2. All the readings were below the limits of radiations recommended by the WHO. Most of the readings in the tested area 1184 (59.2%) were between 0.1 -0.45 µw/cm2 which are 1000- 4500 time less than the maximum allowed level (450 µw/cm2), 527 (26.35%) readings were <0.1 µw/cm2, 271 (13.55%) reading were between 0.45-1 µw/cm2 and the rest 17 (0.85%) were >1 µw/cm2 which were still 236-450 times less than the allowed WHO level. Regarding the questionnaire part, most of the participants use mobile phones frequently, they think radiations are dangerous and can cause cancer, they prefer not to have mobile base stations close to their living places. In this study, a scanning for all electromagnetic radiation sources caused by different sources of wireless communication systems showed theoretically no dangerous radiation levels and all the recorded levels were much lower than the recommended levels by the WHO. Most people feel afraid from radiations and think they are dangerous.

Evaluation of Electromagnetic Radiation level in the Outdoor from Wireless Transmission Systems in Northern West Bank – Palestine

2021 ◽  
Vol 9 (1) ◽  
pp. 01-09
Author(s):  
Mutamed Khatib
Keyword(s):  
Electromagnetic Radiation ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Communication Systems ◽  
West Bank ◽  
Base Stations ◽  
World Health ◽  
Area Network ◽  
Different Sources ◽  
Local Radio

Exposure to electromagnetic fields is a major public concern due to the possible hazardous effects on health caused by exposure to these radiations. The aims of this study were to measure radiofrequency radiation levels from different wireless systems and to compare the results with the recommended limits by the World Health Organization (WHO) which should be less that 450 µw/cm2. The study was a cross-sectional study that was conducted in different cities and villages from the northern governorates in the West Bank; Jenin, Tulkarm, Nablus, Qalqilya, Tubas and Salfit. To measure the radiation levels ranging from 80 MHz to 2 GHz, a Portable Field Strength Meter with the suitable set of antennas was used. This frequency range covers the radiations from different sources as mobile phone base stations, local radio and television stations, mobile phones, Wireless Local Area Network, Bluetooth, wireless computer periphery and even microwave ovens. Points close to mobile phone base stations and local radio and television stations in addition to randomly selected points were included. The scanning process for each point was done twice and the higher reading was included in the analysis. The results were compared to the recommended limits of radiations by WHO. Also, a questionnaire was distributed to evaluate people knowledge and perception regarding radiations. A total of 2000 readings were obtained with a mean ± SD = 0.25 ± 0.214 µw/cm2. The highest reading was 1.91 µw/cm2. All the readings were below the limits of radiations recommended by the WHO. Most of the readings in the tested area 1184 (59.2%) were between 0.1 -0.45 µw/cm2 which are 1000- 4500 time less than the maximum allowed level (450 µw/cm2), 527 (26.35%) readings were <0.1 µw/cm2, 271 (13.55%) reading were between 0.45-1 µw/cm2 and the rest 17 (0.85%) were >1 µw/cm2 which were still 236-450 times less than the allowed WHO level. Regarding the questionnaire part, most of the participants use mobile phones frequently, they think radiations are dangerous and can cause cancer, they prefer not to have mobile base stations close to their living places. In this study, a scanning for all electromagnetic radiation sources caused by different sources of wireless communication systems showed theoretically no dangerous radiation levels and all the recorded levels were much lower than the recommended levels by the WHO. Most people feel afraid from radiations and think they are dangerous.

scholarly journals Design and Characterization of Wideband Printed Antenna Based on DGS for 28 GHz 5G Applications

2021 ◽  
Vol 21 (3) ◽  
pp. 177-183
Author(s):  
Wahaj Abbas Awan ◽  
Syeda Iffat Naqvi ◽  
Aqeel Hussain Naqvi ◽  
Syed Muzahir Abbas ◽  
Abir Zaidi ◽  
...  
Keyword(s):  
Communication Systems ◽  
Ground Plane ◽  
Substrate Thickness ◽  
Printed Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Fifth Generation ◽  
Peak Gain ◽  
Good Agreement

In this paper, a compact, wideband, printed antenna is proposed for millimeter-wave fifth-generation communication systems. The proposed design is a patch antenna with a defected ground structure, in which ground plane defects are utilized to reduce resonance and achieve wideband operation. The optimized antenna dimensions are 2.5 mm × 4.5 mm with a substrate thickness of 0.203 mm. A prototype antenna was fabricated and measured to verify the performance, and it was established that the simulated and measured results were in good agreement. The measured bandwidth was approximately 6.4 GHz (26.5–32.9 GHz) with a peak gain of 5.62 dBi and an efficiency in operational bandwidth of 84%. The compactness, wide bandwidth, and decent gain suggest that the proposed antenna is a potential contender for forthcoming communication systems.

Correlating Personality and Actual Phone Usage

2014 ◽  
Vol 35 (3) ◽  
pp. 158-165 ◽  
Author(s):  
Christian Montag ◽  
Konrad Błaszkiewicz ◽  
Bernd Lachmann ◽  
Ionut Andone ◽  
Rayna Sariyska ◽  
...  
Keyword(s):  
Big Data ◽  
Social Network ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Self Report ◽  
Psychological Variables ◽  
New Approach ◽  
Report Data ◽  
Self Report Data ◽  
Voice Calls

In the present study we link self-report-data on personality to behavior recorded on the mobile phone. This new approach from Psychoinformatics collects data from humans in everyday life. It demonstrates the fruitful collaboration between psychology and computer science, combining Big Data with psychological variables. Given the large number of variables, which can be tracked on a smartphone, the present study focuses on the traditional features of mobile phones – namely incoming and outgoing calls and SMS. We observed N = 49 participants with respect to the telephone/SMS usage via our custom developed mobile phone app for 5 weeks. Extraversion was positively associated with nearly all related telephone call variables. In particular, Extraverts directly reach out to their social network via voice calls.

The Effect of Prestige Sensitivity on Price Acceptance in Vietnam’s Mobile Phone Market

2018 ◽  
pp. 97-112
Author(s):  
Huyen Thi Nguyen ◽  
Ngoc Minh Nguyen
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Structural Equation ◽  
Sampling Method ◽  
Product Knowledge ◽  
Mediating Role ◽  
Modelling Method ◽  
Equation Modelling ◽  
Convenience Sampling

The purpose of this study is to examine the effect of prestige sensitivity on mobile phone customer’s price acceptance in Vietnam and the mediating role of product knowledge and price mavenism on this relationship. We used the convenience sampling method for data collection via questionnaires with a sample of 605 consumers who purchased mobile phones. The collected data was analysed by applying a structural equation modelling method. The result indicates that prestige sensitivity has both direct and indirect effects on price acceptance via product knowledge and price mavenism. The findings suggest that prestige sensitivity can be used as a market segmentation criterion for mobile phones when making price decisions and providing customers with adequate information could improve price acceptance.

Women, Empowerment, and Mobile Phones in the Developing World

2020 ◽  
pp. 528-544
Author(s):  
Laura Stark
Keyword(s):  
Developing Countries ◽  
Mobile Phone ◽  
Social Status ◽  
Mobile Phones ◽  
Mobile Communication ◽  
Recent Literature ◽  
Mobile Telephony ◽  
Women Empowerment ◽  
Gender And Development ◽  
And Control

This chapter surveys and analyzes recent literature on mobile communication to examine its relationship to gender and development, more specifically how women in developing countries use and are impacted by mobile phones. Focusing on issues of power, agency, and social status, the chapter reviews how mobile telephony has been found to be implicated in patriarchal bargaining in different societies, how privacy and control are enabled through it, what benefits have been shown to accrue to women using mobile phones, and what barriers, limitations, and disadvantages of mobile use exist for women and why. The conclusion urges more gender-disaggregated analysis of mobile phone impact and use and offers policy and design recommendations based on the overview and discussion.

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