Dipole Antenna With Horn Waveguide for Energy Harvesting in DTV Systems

Naktong, Watcharaphon; Wattikornsirikul, Natchayathorn

doi:10.2528/pierm22040101

Cited by 3 publications

(3 citation statements)

References 36 publications

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“…It helps respond to frequency adjusting as desired, including increasing the gain rate even more. To be able to find appropriate values for differences in wave transmission through other types of materials as desired from research [40][41][42][43][44][45][46][47].…”

Section: Discussionmentioning

confidence: 99%

An Adjusted Waveguide Antenna with A Woodpile-Shaped EBG for Eucalyptus Wood Moisture Content Measurement

Naktong,

Puangnak,

Phanthuna

et al. 2024

Trends Sci

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A rectangular waveguide antenna was tested for eucalyptus wood moisture content (MC) measurement before being used. To improve the moisture content measurement of the rectangular waveguide antenna, a woodpile-shaped Electromagnetic Band Gap (EBG) was installed by Transverse Electric (TE) arrangement. This antenna is responsible for receiving and transmitting signals which are converted from electrical energy into radio frequency energy transmitted through the air. In this research, we take advantage of the wave propagation of antennas in the air and use them to propagate waves through wood materials. To compare signal transmission power to determine moisture content in wood and the benefit of the EBG is that it acts like a convex lens to increase the strength of the waves so that they can penetrate the wood more efficiently. The results showed that woodpile-shaped EBG could increase the efficiency of receiving and transmitting signals, reduce working hours for farmers and reduce costs by about 90 %. When this antenna was tested and actually used, it was found that the frequency band that responded best to the moisture content value was 2.20 GHz. This antenna was built with an aluminum material of size 9×4×15 cm3 and 2×6 units woodpile EBG on a 9.54×4 cm2 Polyester Mylar base plate. There was a gain of 7.81 dBi from the original structure, or by 20 %. At a radius of 4 cm, the values of moisture content ranged from –9.46 to –42.19 dBm. At a radius of 6 cm, the values were –9.41 to –42.89 dBm. At a radius of 8 cm, the values ranged from –9.39 to –43.01 dBm, respectively. All 3 values were found to be efficient. The size was not less than 84 % compared to the general standard meter. HIGHLIGHTS A rectangular waveguide antenna was tested for eucalyptus wood moisture content (MC) measurement before being used. To improve the moisture content measurement of the rectangular waveguide antenna, a woodpile-shaped Electromagnetic Band Gap (EBG) was installed by Transverse Electric (TE) arrangement. This antenna is responsible for receiving and transmitting signals which are converted from electrical energy into radio frequency energy transmitted through the air. In this research, we take advantage of the wave propagation of antennas in the air and use them to propagate waves through wood materials. To compare signal transmission power to determine moisture content in wood and the benefit of the EBG is that it acts like a convex lens to increase the strength of the waves so that they can penetrate the wood more efficiently. The results showed that woodpile-shaped EBG could increase the efficiency of receiving and transmitting signals, reduce working hours for farmers and reduce costs by about 90 %. When this antenna was tested and actually used, it was found that the frequency band that responded best to the moisture content value was 2.20 GHz. This antenna was built with an aluminum material of size 9×4×15 cm3 and 2×6 units woodpile EBG on a 9.54×4 cm2 Polyester Mylar base plate. There was a gain of 7.81 dBi from the original structure, or by 20 %. At a radius of 4 cm, the values of moisture content ranged from –9.46 to –42.19 dBm. At a radius of 6 cm, the values were –9.41 to –42.89 dBm. At a radius of 8 cm, the values ranged from –9.39 to –43.01 dBm, respectively. All 3 values were found to be efficient. The size was not less than 84 % compared to the general standard meter. GRAPHICAL ABSTRACT

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Section: Discussionmentioning

confidence: 99%

An Adjusted Waveguide Antenna with A Woodpile-Shaped EBG for Eucalyptus Wood Moisture Content Measurement

Naktong,

Puangnak,

Phanthuna

et al. 2024

Trends Sci

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“…The RF frequency bands encompass a range of frequencies stretching from 10 kHz to 30 GHz, spanning from very-low frequency (VLF) to super-high frequency (SHF) [9]. There are several ranges of frequencies that can be used to harvest energy such as Wi-Fi access points [10], [11], cellular base station [12], radio broadcast stations (FM/AM radio) [13] as well as television/digital television (TV/DTV) [14]- [18].…”

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confidence: 99%

“…Additionally, Thailand's transition to digital television since 2014 has led to extensive coverage of digital TV signals, which researchers have identified as potential energy harvesting sources [31]. There has been research using Thailand's digital TV signals for energy harvesting [18], but the name of few. In our research, we investigate the feasibility of using digital TV signals for energy harvesting, focusing on the multiplier circuit that is used as a RF-direct current (DC) conversion for ambient RF energy havesting.…”

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confidence: 99%

RF-DC conversion for RF energy harvesting from digital TV signals using voltage multiplier circuits

Panmuang,

Sonsilphong,

Soemphol

2024

TELKOMNIKA

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Due to the development of wireless communications, there has been a growth in the use of IoT devices and sensor nodes. A potential power source for powering equipment in remote or inaccessible locations is necessary. This research investigates the feasibility of employing digital television (DTV) signals as an energy harvesting system, with a focus on RF-DC conversion using a voltage multiplier circuit. Commercial 5 and 9 element yagi-uda antennas are used as receiver for ambient DTV signal. The device's performance is initially evaluated within the laboratory setting, it has been shown that when the RF signal generator is at 660 MHz, the proposed energy harvesting device can generate a maximum DC voltage of 781.3 mV and 1056.4 mV for 5 and 9 element antenna, respectively. This is based on measurement of voltage output when using the input signal from DTV base stations in Thailand. It was found that the voltage output levels decreased gradually with increasing distance ranging from 153.4 V at 0.1 km to 4.5 mV at 10 km for 5 element yagi-uda antenna. In contrast, the 9-element yagi-uda antenna consistently exhibited higher voltage levels, ranging from 354.7 mV at 0.1 km to 12.6 mV at 10 km.

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Waveguide antenna with an inverted 3-tiered cake-shaped probe for NB-IoT applications

Promput

Naktong

Sakulchat

et al. 2023

2023 International Electrical Engineering Congress (iEECON)

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Dipole Antenna With Horn Waveguide for Energy Harvesting in DTV Systems

Cited by 3 publications

References 36 publications

An Adjusted Waveguide Antenna with A Woodpile-Shaped EBG for Eucalyptus Wood Moisture Content Measurement

An Adjusted Waveguide Antenna with A Woodpile-Shaped EBG for Eucalyptus Wood Moisture Content Measurement

RF-DC conversion for RF energy harvesting from digital TV signals using voltage multiplier circuits

Waveguide antenna with an inverted 3-tiered cake-shaped probe for NB-IoT applications

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