A Co-Planar Waveguide Ultra-Wideband Antenna for Ambient Wi-Fi RF Power Transmission and Energy Harvesting Applications

This study proposes an ultra-wideband antenna for ambient radio frequency (RF) energy harvesting applications. The antenna is based on a co-planar waveguide (CPW) transmission line and incorporates a rectangular slot as an antenna harvester. The proposed antenna utilizes an evolutionary design process to achieve impedance matching of the 50 Ω CPW feeding line over the desired frequency bands. A parametric study investigates CPW elements and rectangular slot size. The harvester antenna is then connected to the primary rectifier circuit of the voltage doubler to examine the signal characteristics. The antenna covers the Industry, Science, and Medicine (ISM) Wi-Fi bands of 2.45 GHz and 5 GHz, achieving a realized gain of 3.641 dBi and 4.644 dBi at 2.45 GHz and 5 GHz, respectively. It exhibits a relatively broad frequency ranging from 2.16 GHz to 6.32 GHz, covering the ultra-wideband fractional bandwidth (FBW) of 105%

A Co-Planar Waveguide Ultra-Wideband Antenna for Ambient Wi-Fi RF Power Transmission and Energy Harvesting Applications

This study proposes an ultra-wideband antenna for ambient radio frequency (RF) energy harvesting applications. The antenna is based on a co-planar waveguide (CPW) transmission line and incorporates a rectangular slot as an antenna harvester. The proposed antenna utilizes an evolutionary design process to achieve impedance matching of the 50 Ω CPW feeding line over the desired frequency bands. A parametric study investigates CPW elements and rectangular slot size. The harvester antenna is then connected to the primary rectifier circuit of the voltage doubler to examine the signal characteristics. The antenna covers the Industry, Science, and Medicine (ISM) Wi-Fi bands of 2.45 GHz and 5 GHz, achieving a realized gain of 3.641 dBi and 4.644 dBi at 2.45 GHz and 5 GHz, respectively. It exhibits a relatively broad frequency ranging from 2.16 GHz to 6.32 GHz, covering the ultra-wideband fractional bandwidth (FBW) of 105%

A Review on the Role of TECHNOLOGY Leadership in Teaching and Learning at Higher Learning Institutions in Post COVID-19

When it comes to technology leadership (TL), this paper reviews and discusses how important it is for the community in higher learning institutions (HLI) to be technology leaders, especially in teaching and learning post-COVID-19. Leadership issues in higher learning institutions are looked at in institutional development, faculty development, and student management.  TL person can play a role in these areas. Another topic is how technology changes how HLI is run post-COVID-19.  It includes a description of how technology changes how the higher institution is run. Increasing public awareness of the necessity for TL managers and doctorate students should aim at administrative leadership positions for current policy formation, strategic planning, administration, assessment, and institutional development implementation; and a discussion of the necessary skills and tactics for becoming a technology leader. Attributes of TL professionals should do more than just run distribution units or provide essential services. A prerequisite to drive change in institutional growth, employ technology in the learning process, manage resources, and collaborate effectively with academics to plan education. TL should be able to collaborate with institutional leaders on policy and planning for the deployment of instructional technology, faculty development, and institutional development. The positions that allow TL able to do this. The selected TL persons have formal training in technology in education, instructional media, instructional technology, instructional systems, communication in education, and all their related areas. They have also had previous job experience., so they are called Technology Leadership professionals

A Review on The Role of Technology Leadership in Teaching and Learning at Higher Learning Institutions in Post COVID-19

When it comes to technology leadership (TL), this paper reviews and discusses how important it is for the community in higher learning institutions (HLI) to be technology leaders, especially in teaching and learning post-COVID-19. Leadership issues in higher learning institutions are looked at in institutional development, faculty development, and student management.  TL person can play a role in these areas. Another topic is how technology changes how HLI is run post-COVID-19.  It includes a description of how technology changes how the higher institution is run. Increasing public awareness of the necessity for TL managers and doctorate students should aim at administrative leadership positions for current policy formation, strategic planning, administration, assessment, and institutional development implementation; and a discussion of the necessary skills and tactics for becoming a technology leader. Attributes of TL professionals should do more than just run distribution units or provide essential services. A prerequisite to drive change in institutional growth, employ technology in the learning process, manage resources, and collaborate effectively with academics to plan education. TL should be able to collaborate with institutional leaders on policy and planning for the deployment of instructional technology, faculty development, and institutional development. The positions that allow TL able to do this. The selected TL persons have formal training in technology in education, instructional media, instructional technology, instructional systems, communication in education, and all their related areas. They have also had previous job experience., so they are called Technology Leadership professionals

A Power Processing Circuit for Indoor Wi-Fi Energy Harvesting for Ultra-Low Power Wireless Sensors

This article proposes a complete power processing circuit for an indoor 2.45 GHz Wi-Fi energy harvesting system. The proposed power processing circuit works by using power harvested from indoor Wi-Fi transmitters. The overall system of this work is simplified as an equivalent circuit and analyzed mathematically. A two-port network is analyzed in formulating the relevant equations of the equivalent circuit. The importance of matching the impedance of a harvesting antenna to the rectifier circuit is highlighted by using simulation analysis, and it is shown that the impedance matching for both components has satisfied the conditions for a high sensitivity circuit and radio frequency-to-direct current (RF-to-DC) power conversion. Actual experiments showed that the proposed power processing circuit could operate with an incident power as low as −50 dBm. It has been found that the proposed harvesting system stored 0.11 J in a 200 mF supercapacitor as the storage device in 20 hours of the experimentation periods. Moreover, actual results for the overall energy harvesting system is compared with previous research, and it has been found that the proposed system has advantages over the listed works

A Radio Frequency Energy Harvesting System Using ASTROBroadcasting Signal

Energy harvesting system holds promising future to be an energy source for low power electronics device. Normally, an energy harvesting system is designed to operate with relatively small input power. The system relies on state-of-the-art electrical technology for obtaining high efficiency. In this research, particular attention is given to radio frequency (RF) energy harvesting as a green technology, which is very suitable for overcoming problems related to wireless sensor nodes located in harsh environments or inaccessible places. In this project, a simple RF energy harvesting system is fabricated on FR4 substrate. The harvesting circuit uses a single diode as the rectification circuit and a Supercapacitor for the energy storage device. The transmitted signal from ASTRO broadcasting system has been selected as the energy source for the proposed harvesting system. The practical test has demonstrated that a small value of energy has been successfully stored in the storage device. The amount can be used to drive a wireless sensor node which operates, occasionally