Green Hierarchical Radio-over-Fiber Distributed Antenna System Based Wireless Sensor Network for Spectrum Monitoring

2014 ◽  
Author(s):  
Xi Shen ◽  
Shuhui Jiang ◽  
Xi Wu ◽  
Dayong Liu ◽  
Xiaofei Zhang ◽  
...  
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Antenna System ◽  
Radio Over Fiber ◽  
Wireless Sensor ◽  
Distributed Antenna System ◽  
Spectrum Monitoring ◽  
Distributed Antenna

A compact omnidirectional to directional frequency reconfigurable antenna for wireless sensor network applications

2021 ◽  
pp. 1-12
Author(s):  
Melvin Chamakalayil Jose ◽  
Radha Sankararajan ◽  
Balakrishnapillai Suseela Sreeja ◽  
Mohammed Gulam Nabi Alsath ◽  
Pratap Kumar
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Radiation Pattern ◽  
Antenna System ◽  
Wireless Sensor ◽  
Dual Band ◽  
Design Parameters ◽  
Pin Diodes ◽  
Band Frequency ◽  
Directional Radiation

Abstract In the proposed research paper, a novel compact, ultra-wideband electronically switchable dual-band omnidirectional to directional radiation pattern microstrip planar printed rectangular monopole antenna (PRMA) has been presented. The proposed antenna system has an optimum size of 0.26 λ0 × 0.28 λ0. A combination of radiators, reflectors, and two symmetrical grounds does place on the same layer of the rectangular microstrip PRMA. The frequency agility and the radiation pattern from omnidirectional to directional are achieved using two SMD PIN diodes (SMP1340-04LF). The directional radiation patterns with 180° phase shifts are achieved at the C-band frequency spectrum. The parametric study of the proposed antenna system was performed for different design parameters, and the antenna characteristics were analyzed. An antenna prototype is fabricated using the printed circuit board etching method by using RMI UV laser etching and cutting tools. The measurements of the proposed antenna are conducted in an anechoic chamber to validate the simulations. There are three states of operations due to two SMD PIN diodes being used in switching circuits. In state-I, the proposed antenna radiates at 6.185 GHz (5.275–6.6 75 GHz) in the Ф = 270° direction with a gain of 2.1 dBi, whereas in state-II, it radiates at 5.715 GHz (5.05–6.8 GHz) in the Ф = 90° direction with a gain of 2.1 dBi. In state-III, the antenna exhibits the X-band frequency with center frequency at 9.93 GHz (8.845–10.49 GHz), and the omnidirectional pattern offers a gain of 4.1 dBi. The features of the proposed antenna are suitable for high-speed wireless sensor network communication in industries such as chemical reactors in oil and gas and pharmaceuticals. It is also well suited for IoT and 5G-sub-6-GHz applications.

Feasibility Demonstration of a Mode-Division Multiplexed MIMO-Enabled Radio-Over-Fiber Distributed Antenna System

2014 ◽  
Vol 32 (20) ◽  
pp. 3521-3528 ◽  
Author(s):  
George S. D. Gordon ◽  
Michael J. Crisp ◽  
Richard V. Penty ◽  
Timothy D. Wilkinson ◽  
Ian H. White
Keyword(s):  
Antenna System ◽  
Radio Over Fiber ◽  
Distributed Antenna System ◽  
Distributed Antenna

Radio-over-Fiber Distributed Antenna System for WiMAX Bullet Train Field Trial

2009 ◽  
Author(s):  
Bruce Chow ◽  
Ming-Li Yee ◽  
Michael Sauer ◽  
Anthony Ng'Oma ◽  
Ming-Chien Tseng ◽  
...  
Keyword(s):  
Field Trial ◽  
Antenna System ◽  
Radio Over Fiber ◽  
Distributed Antenna System ◽  
Distributed Antenna ◽  
Bullet Train
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