A wideband slot antenna for mobile phone applications

2016 ◽  
Author(s):  
Xia Xiao ◽  
Wei-Hua Zong ◽  
Shan-Dong Li ◽  
Xiang-Yang Wei ◽  
Xiao-Yun Qu
Keyword(s):  
Mobile Phone ◽  
Slot Antenna ◽  
Mobile Phone Applications

scholarly journals A Wideband Antenna with Circular and Rectangular Shaped Slots for Mobile Phone Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Wei-Hua Zong ◽  
Xiao-Mei Yang ◽  
Xia Xiao ◽  
Shan-Dong Li ◽  
Xiang-Yang Wei ◽  
...  
Keyword(s):  
Transmission Line ◽  
Mobile Phone ◽  
Impedance Matching ◽  
Ground Plane ◽  
Slot Antenna ◽  
Microstrip Transmission Line ◽  
Rectangular Shape ◽  
Antenna Size ◽  
Wideband Antenna ◽  
Mobile Phone Applications

A wideband slot antenna for mobile phone applications is proposed. The antenna has two slots with open ends etched on the opposite edges of the ground plane. The main slot, of total length of 59 mm, is composed of a rectangle connected to a circle having radius of 5 mm. Another slot, having a rectangular shape with width of 2.8 mm and length of 26 mm, is employed to enhance the antenna bandwidth. The slots are fed by means of a rectangular monopole connected to a circular patch joined to a bent 50 Ω microstrip transmission line forming two right angles. To obtain a wideband impedance matching, the upper edge of the monopole and a part of the feeding line evolve along the top edge of the two slots. To reduce the antenna size, the upper part of the board above the slot (just 3 mm from the slot) is folded vertically to the ground plane. The measured bandwidth of the antenna is 0.698–1.10 GHz and 1.64–2.83 GHz covering LTE700/2300/2500, GSM850/900/1800/1900, and UMTS bands.

A SYSTEMATIC ANALYSIS OF THE EFFECTS OF MOBILE PHONE APPLICATIONS ON PHYSICAL ACTIVITY

2020 ◽  
Vol 2020 ◽  
pp. 1483-1484
Author(s):  
Masoumeh Hosseinpour ◽  
◽  
Ralf Terlutter ◽  
Holger Roschk
Keyword(s):  
Physical Activity ◽  
Mobile Phone ◽  
Systematic Analysis ◽  
Mobile Phone Applications

Implementasi Keamanan pada Transaksi Data Menggunakan Sertifikat Digital X.509

2017 ◽  
Vol 8 (1) ◽  
pp. 1-10
Author(s):  
Is Mardianto ◽  
Kuswandi Kuswandi
Keyword(s):  
Mobile Phone ◽  
Web Service ◽  
Data Exchange ◽  
User Authentication ◽  
Digital Certificate ◽  
Security Issues ◽  
Diffie Hellman ◽  
Digital Certificates ◽  
Mobile Phone Applications ◽  
Secure Hash Algorithm

Security issues have become a major issue on the Internet. One of the security methods that are widely used today is to implement a digital certificate. Digital certificates have evolved over time, one of which is the X.509 digital certificate. Digital certificates have been widely used as authentication applications, web network authentication and other authentication systems that require digital certificates. This research is carried out by implementing an X.509 digital certificate technology as a mobile web service with its client. Secure Hash Algorithm (SHA), Diffie-Hellman, and Advanced Encryption Standard (AES) are used to secure the data exchange transaction between the web service and mobile phone. SHA algorithm will be used for user authentication, Diffie-Hellman algorithm will be used for public key exchange and AES algorithms will be used for symmetric cryptography data. The results of the application of digital certificates, the SHA algorithm, Diffie-Hellman, and AES in mobile phone applications, provide security application running on web service. Index Terms—Digital Certificate, X.509, SHA, Diffie Hellman, AES

Mobile phone applications in academic library services: a students' feedback survey

2006 ◽  
Vol 23 (1) ◽  
pp. 35-51 ◽  
Author(s):  
Nor Shahriza Abdul Karim ◽  
Siti Hawa Darus ◽  
Ramlah Hussin
Keyword(s):  
Mobile Phone ◽  
Academic Library ◽  
Library Services ◽  
Mobile Phone Applications
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