Electromagnetically coupled elliptical antenna for UWB and WLAN/WiMAX systems

2022

IET Communications

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Here, a multi‐band microstrip‐fed antenna is presented. The compact size of the antenna is 32 × 18 mm2, which makes it attractive to mobile devices. Antenna prototype is fabricated using FR4 dielectric material with dielectric constant 4.4 and thickness 1.6 mm. The radiating patch of the antenna consists of four hook‐shaped rings and truncated ground‐plane helps to achieve good impedance matching. A very compact microstrip feedline is utilized to couple electromagnetic energy to radiating patch. The measured S11 ≤ ‐10 dB of the multiband antenna is achieved at the GSM 1800 /1900 MHz, Bluetooth 2.4 GHz, WLAN 2.4/5.2 GHz and WiMAX 2.5/3.5/5.5 GHz bands. The antenna's performance reveals that it operates in several bands, has a high gain, and radiates in an omnidirectional pattern. Simulated and measured results are presented to show good accommodation. In addition, to have a good view and better show the innovation presented in this article, the suggested multi‐band monopole antenna is compared to various previously presented multiband microstrip antennas using the Analytic Hierarchy Process approach which is an accurate and fair method for selecting the best candidate and is used a lot in various cases.

Section: Introductionmentioning

confidence: 99%

Evaluation of a novel hook‐shaped multiband monopole antenna based on the AHP method

2022

IET Communications

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“…For specific WLAN implementations, the frequency range is 5.15-5.85 GHz. Recently there have been multiple designs by innovative structures (Rezvani and Zehforoosh, 2017;Fatolahzadeh and Zehforoosh, 2017;Zehforoosh and Zavvari, 2020). The Bluetooth technology is widely used in electronic devices and is always one of the best candidates in personal area networks.…”

Section: Introductionmentioning

confidence: 99%

Multiple-input multiple-output antenna for dual-band applications with a novel radiating patch and enhanced feeding network

Alemi

2021

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Purpose An Elephant trunk shape (ETS) radiating element is used to achieve the two covering bands of multi-input multi-output (MIMO) antenna. These frequency bands can be controlled by the length of a slot embedded in ETS. The slot length in ETS plays a defining role in controlling the impedance bandwidth (IBW) of the MIMO antenna, and its diligent adjustment of it leads to cover the frequency range of Bluetooth and Wireless Local Area Network systems. Design/methodology/approach A new MIMO antenna is introduced in this paper in conjunction with an enhanced Wilkinson power divider feeding platform. Findings These frequency bands can be controlled by the length of a slot embedded in ETS. The slot length in ETS plays a defining role in controlling the IBW of the MIMO antenna, and its diligent adjustment leads to covering the frequency range of Bluetooth and WLAN systems. Originality/value The proposed MIMO antenna benefits from good isolation between ports for both frequency bands. The proposed MIMO antenna is constructed on FR4 substrate with a volume of 90 × 134 × 1.6 mm3.

“…However, none of these antennas provide MIMO characteristic. In Reference , a MIMO antenna proposed for UWB and WLAN/WiMAX system. In this antenna, an elliptical structure can reject WLAN/WiMAX band.…”

Section: Introductionmentioning

confidence: 99%

A tiny EBG‐based structure multiband MIMO antenna with high isolation for LTE/WLAN and C/X bands applications

Beigi

Rezvani

Int J RF Microw Comput Aided Eng

et al. 2019

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This article proposes a compact multiple-input multiple-output (MIMO) antenna with the electromagnetic band gap (EBG) structures for mobile terminals. The proposed MIMO antenna is composed of two radiation patches in which diagonal and folded microstrip lines are utilized to control the frequency bands. The radiation patch, one EBG structure and a rectangular-shaped ground plane are etched on both sides of the antenna. The EBG structures have been employed for reducing the mutual coupling between the antenna elements. As a result of the effect of these structures, the mutual coupling between the two elements is reduced by less than −30 dB. The proposed antenna is implemented on an FR4 substrate with dimensions 20 × 10 × 1 mm 3 . According to measured results, frequency ranges of 2.2 to 3.6 GHz and 5.1 to 5.9 GHz with S 11 < −10 dB and also 3.7 to 5 GHz and 8 to 12 GHz with S 22 < −10 dB have been obtained. Moreover, measured S 12 and S 21 with values of less than −30 dB for both Ports have been realized. Additionally, the envelope correlation and radiation efficiency of the purposed antenna are less than 0.09 and more than 82%, respectively. K E Y W O R D S EBG, LTE, MIMO antenna, WLAN