Study on frequency and impulse response of novel triple band notched UWB antenna in indoor environments

Emadian, Seyed Ramin; Ahmadi‐Shokouh, Javad; Ghobadi, Changiz; Nourinia, Javad

doi:10.1016/j.aeue.2018.09.003

Cited by 13 publications

(5 citation statements)

References 13 publications

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“…Since the application of ultra-wideband (UWB) frequency was proposed, it has become the focus of many engineers of wireless communication technology. Due to the high transmission rate and low power consumption, UWB technology has been widely used in the fields of ground-penetrating radar [ 1 , 2 ], wireless sensors [ 3 ], precise positioning [ 4 ], biomedical engineering [ 5 , 6 ], etc. However, the presence of many narrowband communication systems creates some interferences with the UWB system because those frequency bands are also included in the operating band of the UWB system.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Parallel and Orthogonal MIMO Antennas with Two-Notched Structures for Ultra-Wideband Application

Wang

Zheng

2023

Micromachines

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Ultra-wideband (UWB) technology is widely used in many communication scenarios. However, narrowband systems can easily interfere with the UWB system, which generates multipath fading. In order to solve these interferences and meet the design requirements of high isolation of multiple-input multiple-output (MIMO) antennas, two MIMO antennas with double-notch structures are designed. Firstly, two U-shaped slots are etched on the radiating patch and feeder to achieve notch characteristics in WiMAX and ITU bands. Using this antenna element, a two-element antenna is put symmetrically in parallel, and two rectangular branches are loaded to improve the isolation. The size is 0.57λ × 0.32λ × 0.013λ (at 2.5 GHz). Then, a four-element antenna is designed to meet the requirements for another application; here, each element is placed orthogonally to each other, and the isolation is improved through loading a cross-shaped branch in the middle of these elements. The size is 0.57λ × 0.57λ × 0.013λ. Both antenna samples are tested to verify the design. Measurement results show that the working bandwidth is 2.45–14.88 GHz and 2.14–14.95 GHz, the isolation is greater than 17 and 20 dB, and the peak gain is 5.7 and 5.9 dBi for the two- and four-element MIMO antenna, respectively. Compared to the references, the designed antennas have a wider bandwidth and a higher gain and radiation efficiency. They are well-suited for diverse wireless applications.

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Section: Introductionmentioning

confidence: 99%

Investigation of Parallel and Orthogonal MIMO Antennas with Two-Notched Structures for Ultra-Wideband Application

Wang

Zheng

2023

Micromachines

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“…With the rapid development of wireless communication technology, ultra-wideband (UWB) technology has become the focus of many researchers due to its advantages of high transmission rate, low power consumption, omnidirectional radiation characteristics and wide bandwidth. So far, UWB technology has been widely applied in the fields of ground-penetrating radar [1][2], wireless sensor [3], precise positioning [4], biomedical engineering [5][6] and so on. However, many narrowband communication bands will strongly interfere with the normal operation of the UWB system, because these bands are also included in the operating bandwidth of the UWB system.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Parallel and Quadrature MIMO Antennas with Double-Notched Structure for UWB Applications

Wang¹,

Wang²,

Chen³

et al. 2023

Preprint

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In order to solve the interference of narrowband communication system to ultra-wideband (UWB) system and meet the design requirements of high isolation of multiple-input multiple-output (MIMO) antenna, two MIMO antennas with double notch structures are designed. Firstly, a two-element antenna was placed symmetrically in parallel, and two rectangular branches were loaded to improve the isolation. U-shaped slots and inverted U-shaped slots are etched on the radiating patch and feeder to achieve notch characteristics in WIMAX and ITU band, respectively. Then, in order to meet more application scenarios, a four-element MIMO antenna is designed, where each element is placed orthogonally to each other, and the isolation is improved by loading a cross-shaped branches in the middle of elements. Both antenna samples are tested to verify the design. Measured results show that the working bandwidth of the two-element UWB MIMO antenna is 2.45-14.88 GHz, the isolation is greater than 17 dB, the peak gain is 5.7 dB, the maximum radiation efficiency can reach 96%, the envelope correlation coefficient (ECC)is less than 0.02. Meanwhile, the working bandwidth of the four-element antenna is 2.14-14.95 GHz, the isolation is greater than 20 dB, the peak gain is 5.9 dB, the maximum radiation efficiency can reach 95%, the ECC is lower than 0.05. They both are with very good omnidirectional characteristic, and meet the requirements of the UWB application.

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“…UWB positioning technology has the advantages of high accuracy, low energy consumption, stable performance, simple design, low cost, convenient network node layout, and the absence of harsh requirements on the site environment. Thus, this technology is suitable for use in indoor environments, such as the greenhouse (Emadian et al, 2018;Guo, 2020).…”

Section: Introductionmentioning

confidence: 99%

Design and test of a positioning system for a greenhouse electric micro-tiller based on ultra-wideband

et al. 2022

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Abstract. A positioning system for ultra-wideband (UWB) electric micro-tillers suitable for complex greenhouse environments was designed as the basis for realizing unmanned micro-tillers to address the problem of the frequent safety accidents of existing micro-tillers. First, the positioning base station and tag were designed on the basis of the STM32 and DW1000 chip hardware. The real-time coordinate display of the micro-tiller in the greenhouse could also be realized with the design of the upper computer software. Then, the realization method of the positioning function, including the analysis of time difference of arrival (TDOA) and two-way ranging (TWR) positioning methods, and the selection of the best Taylor positioning algorithm through a MATLAB simulation were studied to reduce the influence of noise and measurement errors on measurement accuracy. Finally, a positioning system accuracy test was conducted. Test results revealed that the maximum positioning error of the micro-tiller positioning system is no more than 6 cm, and the average error is 4.4 cm. The optimized positioning error is reduced by 10.2 %, considering that the influence of the base station location on the accuracy. The positioning system of the greenhouse electric micro-tiller designed in this paper demonstrates a stable performance and positioning accuracy to meet the needs of greenhouse rotary tillage operations. This system has certain theoretical importance and reference value for the development of precise positioning technology for working tools in the greenhouse and the further realization of unmanned rotary tillage operations.

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Study on frequency and impulse response of novel triple band notched UWB antenna in indoor environments

Cited by 13 publications

References 13 publications

Investigation of Parallel and Orthogonal MIMO Antennas with Two-Notched Structures for Ultra-Wideband Application

Investigation of Parallel and Orthogonal MIMO Antennas with Two-Notched Structures for Ultra-Wideband Application

Investigation of Parallel and Quadrature MIMO Antennas with Double-Notched Structure for UWB Applications

Design and test of a positioning system for a greenhouse electric micro-tiller based on ultra-wideband

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