scholarly journals Compact Rectifier Circuit Design for Harvesting GSM/900 Ambient Energy

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1614
Author(s):  
Surajo Muhammad ◽  
Jun Jiat Tiang ◽  
Sew Kin Wong ◽  
Amjad Iqbal ◽  
Mohammad Alibakhshikenari ◽  
...  
Keyword(s):  
Circuit Design ◽  
Communication Systems ◽  
Path Loss ◽  
Input Power ◽  
Wireless Communication Systems ◽  
Rf Power ◽  
Total Size ◽  
High Input Power ◽  
Wide Range ◽  
Rf Energy

In this paper, a compact rectifier, capable of harvesting ambient radio frequency (RF) power is proposed. The total size of the rectifier is 45.4 mm × 7.8 mm × 1.6 mm, designed on FR-4 substrate using a single-stage voltage multiplier at 900 MHz. GSM/900 is among the favorable RF Energy Harvesting (RFEH) energy sources that span over a wide range with minimal path loss and high input power. The proposed RFEH rectifier achieves measured and simulated RF-to-dc (RF to direct current) power conversion efficiency (PCE) of 43.6% and 44.3% for 0 dBm input power, respectively. Additionally, the rectifier attained 3.1 V DC output voltage across 2 kΩ load terminal for 14 dBm and is capable of sensing low input power at −20 dBm. The work presents a compact rectifier to harvest RF energy at 900 MHz, making it a good candidate for low powered wireless communication systems as compares to the other state of the art rectifier.

scholarly journals A Real Case of Implementation of the Future 5G City

2018 ◽  
Vol 11 (1) ◽  
pp. 4 ◽  
Author(s):  
Dania Marabissi ◽  
Lorenzo Mucchi ◽  
Romano Fantacci ◽  
Maria Spada ◽  
Fabio Massimiani ◽  
...  
Keyword(s):  
Communication Systems ◽  
Social Impact ◽  
Field Trials ◽  
Use Cases ◽  
Wireless Communication Systems ◽  
Performance Requirements ◽  
Fifth Generation ◽  
Wide Range ◽  
5G Network ◽  
The Future

The fifth generation (5G) of wireless communication systems is considered the key technology to enable a wide range of application scenarios and the effective spreading of the smart city concept. Vertical business use cases, specifically designed for the future 5G city, will have a strong economical and social impact. For this reason, ongoing 5G field trials have to test newly deployed technologies as well as the capability of 5G to create a new digital economy. This paper describes the 5G field trial environment that was launched in Italy at the end of 2017. The aim is to evaluate the capability of the 5G network of supporting innovative services with reference to suitably designed key performance indicators and to evaluate the opportunities offered by these services. Indeed, vertical business use cases, specifically designed for the future 5G city, with a strong economic and social impact, are under implementation and will be evaluated. In particular, the paper provides a detailed description of the deployment of an actual complete integrated 5G network. It shows how 5G is effective enabling technology for a wide range of vertical business and use cases. Indeed, its flexibility allows to satisfy completely different performance requirements of real services. Some preliminary results, obtained during the first phase, are presented for a smart mobility scenario.

scholarly journals Simple Adaptive Rectifier with High Efficiency over a Range of 21 dBm Input Power for RF Energy Harvesting Applications

2021 ◽  
pp. 8-15
Author(s):  
Eman M. Abdelhady ◽  
◽  
Hala M. Abdelkader ◽  
Amr A. Al-Awamry
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Breakdown Voltage ◽  
Adaptive Design ◽  
High Efficiency ◽  
Power Level ◽  
Input Power ◽  
Rf Energy Harvesting ◽  
High Input Power ◽  
Rf Energy

This paper presents a novel simple adaptive and efficient rectifier for Radio Frequency (RF) energy harvesting applications. Traditional rectifiers have maximum RF-DC Power Conversion Efficiency (PCE) over a narrow range of RF input power due to diode breakdown voltage restrictions. The proposed adaptive design helps to extend the PCE over a wider range of RF input power at 2.45GHz using a simple design. Two alternative paths arecontrolled depending on the RF input power level. Low input power levels activate the first path connected to a single rectifier; low power levels make the diode operate below its breakdown voltage and therefore avoiding PCE degradation. High input power levels activate the second path dividing it into three rectifiers. This keeps input power at each rectifier at a low power level to avoid exceeding the diode break down voltage. Simulated PCE of this work is kept above 50% over a range of 21.4 dBm input power from -0.8dBm to 20.6dBm.

scholarly journals A COMPACT MICROSTRIP ANTENNA BASED ON H-FRACTAL GEOMETRY FOR MULTI- BAND OPERATION

2021 ◽  
Vol 25 (Special) ◽  
pp. 1-49-1-55
Author(s):  
Zainab S. Muqdad ◽  
◽  
Taha A. Elwi ◽  
Zaid A. Abdul Hassain ◽  
◽  
...  
Keyword(s):  
Mobile Communications ◽  
Fractal Geometry ◽  
Microstrip Antenna ◽  
Communication Systems ◽  
Ground Plane ◽  
Wireless Communication Systems ◽  
Total Size ◽  
Antenna Structure ◽  
Rectangular Patch ◽  
Resonance Frequencies

This paper presents a compact, tri-bands, rectangular patch antenna based on H-Tree fractal slots structure for modern wireless communication systems has been introduced. The antenna structure consists of a 70.70×56mm2 rectangular patch printed on 173×173×1.6mm3 FR4 substrate. H-Tree slots fractal geometry with the defective ground plane on the other side to enhance gain and bandwidth. The suggested antenna is fed by a 50 Ω microstrip line. The antenna shows three resonance frequencies: 0.784, 1.158, and 1.772 GHz. The suggested antenna offers a total size reduction of about 75 %. The designed antenna possesses fractional bandwidths of 3.976 %, 7 %, and 2.7866 % for the first, second, and third resonances, respectively. Finally, the proposed antenna is a candidate for Global System for Mobile communications (GSM).

Efficient Configurations for Dynamic Applications in Next Generation Mobile Systems

2016 ◽  
pp. 112-147 ◽  
Author(s):  
Nikolaos Zompakis ◽  
Francky Catthoor ◽  
D. Soudris
Keyword(s):  
Software Defined Radio ◽  
Communication Systems ◽  
Wireless Systems ◽  
Mobile Systems ◽  
Wireless Communication Systems ◽  
Next Generation ◽  
Performance Requirements ◽  
Wide Range ◽  
System Configurations ◽  
Design Challenges

Next generation wireless systems support a wide range of communication protocols and services, opening new design challenges. The desired flexibility presupposes effective approaches that exploit the system configurations with an optimal way. A well-known state-of-the-art example of a wireless platform is the Software Defined Radio (SDR). SDRs are characterized by strict performance requirements that introduce a lot of dynamism in respect with the resource utilization. Additionally, these devices experience transient overloads due to workload bursts or hardware malfunctions. The aforementioned reasons lead the system to take timely reactions to unexpected usage scenarios. The current chapter concentrates on these design challenges exploiting the system scenario methodology, proposing solutions especially for wireless communication systems. More precisely, it will be studied the tradeoffs between the representativeness of the scenarios (clustering overhead), the implementation of the scenario detection (detection overhead) and the platform tuning cost (switching overhead).

scholarly journals RF Energy Scavenging With a Wide-Range Input Power Level

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 173450-173462
Author(s):  
Kyrillos K. Selim ◽  
Shaochuan Wu ◽  
Demyana A. Saleeb
Keyword(s):  
Power Level ◽  
Input Power ◽  
Energy Scavenging ◽  
Wide Range ◽  
Rf Energy
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