Microstrip RF Energy Harvesting-Antenne
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Harvesting energy from multi-band Radio frequency (RF) signals is fast emerging as an alternative energy source for energy autonomous/IoT application where other energy sources, like solar, thermal, vibrational, etc. are absent. In this paper, the design, working and characteristics of a microstrip antenna for harvesting RF energy from GSM
How does a stretchable microstrip antenna perform RF energy harvesting?
The RF energy harvesting performance of the stretchable microstrip antenna was measured by connecting it with a commercial RF energy harvesting evaluation kit (AEM30940 2.45 GHz EVK, e-peas). The same RF module used in wireless communication was explored to transmit the RF energy at a power of 7 dBm.
What are 3D microstrip antennas used for?
The 3D microstrip antennas with strain-insensitive resonance, improved stretchability, and enhanced peak gain are highly promising for use in on-body wireless communication and RF energy harvesting.
How much power does a microstrip antenna use?
Considering the stored energy in the capacitor as E = CU 2 / 2, the average charging power from the rectenna with the “Asy_1:2” and “Sym_1:1” microstrip antenna are 43 and 33 μJ/s, which are significantly higher than that of 22 μJ/s from their 2D counterpart.
Do 3D microstrip antennas cause radiation loss?
Radiation patterns of 3D microstrip antennas Though the ground plane in the microstrip antenna can help isolate the lossy human tissues to avoid performance degradation, the leakage of the electromagnetic field from the meshed ground in stretchable microstrip antennas causes radiation loss.
What is the operational band of a microstrip antenna?
Because of the small shift in the resonance frequency, a large operational band of 0.060 (or 0.055) GHz over 20% stretching is obtained for the “Sym_1:1” (or “Asy_1:2”) microstrip antenna. In comparison, the “Asy_2:1” microstrip antenna only shows an operational band of 0.015 GHz, indicating a less stable mechanical-electromagnetic property.
How does tensile strain affect a 3D microstrip antenna?
As the tensile strain of 20% is applied, the peak gain from all three 3D microstrip antennas increases. Compared with a nearly 50% increase from 1.57 to 2.34 dB for the “Sym_1:1” antenna, the peak gain increase of 9% (from 3.52 to 3.83) and 20% (from 3.09 to 3.72) is smaller for the “Asy_1:2” and “Asy_2:1” microstrip antennas ( Fig. S10 ).