Design of a planar inverted F-L antenna (PIFLA) for lower-band UWB applications

Hraga, H. I.; See, Chan Hwang; Abd‐Alhameed, Raed A.; Jones, S. M. R.; Child, M. B.; Elfergani, Issa; Excell, Peter S.

doi:10.1109/lapc.2010.5666202

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…The S 21 result shows that it is better not to have ripples and fluctuations in order to show a low distortion of the signals when it penetrates the water [ 51 , 52 ]. Figure 10 depicts the S 11 result in fresh water, distilled water, and seawater.…”

Section: Resultsmentioning

confidence: 99%

Compact Elliptical UWB Antenna for Underwater Wireless Communications

et al. 2021

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The increasing needs of free licensed frequency bands like Industrial, Scientific, and Medical (ISM), Wireless Local Area Network (WLAN), and 5G for underwater communications required more bandwidth (BW) with higher data transferring rate. Microwaves produce a higher transferring rate of data, and their associated devices are smaller in comparison with sonar and ultrasonic. Thus, transceivers should have broad BW to cover more of a frequency band, especially from ultra-wideband (UWB) systems, which show potential outcomes. However, previous designs of similar work for underwater communications were very complicated, uneasy to fabricate, and large. Therefore, to overcome these shortcomings, a novel compact elliptical UWB antenna is designed to resonate from 1.3 to 7.2 GHz. It is invented from a polytetrafluoroethylene (PTFE) layer with a dielectric constant of 2.55 mm and a thickness of 0.8 mm. The proposed antenna shows higher gain and radiation efficiency and stability throughout the working band when compared to recent similarly reported designs, even at a smaller size. The characteristics of the functioning antenna are investigated through fluid mediums of fresh-water, seawater, distilled water, and Debye model water. Later, its channel capacity, bit rate error, and data rate are evaluated. The results demonstrated that the antenna offers compact, easier fabrication with better UWB characteristics for underwater 5G communications.

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Section: Resultsmentioning

confidence: 99%

Compact Elliptical UWB Antenna for Underwater Wireless Communications

et al. 2021

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“…To have the lowest possible distortion in the signal transmitted from the proposed antenna to the sample, the transmission response ( S 21 ) needs to be flat at the desired working frequency BW [48, 49]. In addition, the reflection coefficient result ( S 11 ) should present an acceptable result and should not vary too much from the simulated result in air.…”

Section: Simulated and Experimental Resultsmentioning

confidence: 99%

Ultra-wideband elliptical patch antenna for microwave imaging of wood

Saeidi

Ismail

Wen

et al. 2019

Int. J. Microw. Wireless Technol.

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This paper presents the design of an elliptical shape ultra-wide band antenna for imaging of wood. The antenna is constructed comprising an elliptical shape of patch loaded by a stub to resonate at lower bands, strip loading at the back, and chamfered ground. Despite having miniaturized dimensions of 20 mm × 20 mm, the proposed antenna shows better results compared to recent studies. The simulation results depict a good ultra-wide bandwidth from 2.68 to 16 GHz, and 18.2–20 GHz. Besides, the proposed antenna has two low-frequency bands at 0.89–0.92 and 1.52–1.62 GHz, maximum gain of 5.48 dB, and maximum directivity of 6.9 dBi. The measurement outcomes are performed in air, plywood, and high-density wood and show a good agreement with the simulated results done using electromagnetic simulator CST. In addition to that, the measurement results of S-parameters, transmitted and received signals show a good agreement with the simulated results. Besides, the measured results illustrate a good isolation and uniform illumination among arrays as well as the received signals' shapes do not change in different environments, but only the amplitude. Hence, the proposed antenna seems to be adequate for microwave imaging of wood.

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