Lecture Notes on Data Engineering and Communications Technologies

2018

DOI: 10.1007/978-981-10-8339-6_15

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Spanner Shape Monopole MIMO Antenna with High Gain for UWB Applications

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Santosh Singh Thakur

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Cited by 5 publications

(7 citation statements)

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“…The placement of second monopole induced surface currents and affected the impedance match of the second monopole at lower frequencies, which was improved by inserting a U−shaped slot [4]. The polarization purity of element 1 is high while the polarization of element 2 is low.…”

Section: And Rmentioning

confidence: 99%

“…For instance, high speed and data rates in Wireless Personal Area Networks (WPAN) is only possible with UWB-MIMO technology [3]. One key specification of such MIMO antennas is that isolation between its elements should be more than 15 dB to ensure mitigation of inter-element Electromagnetic Interference (EMI) [4]- [8]. The inter-element EMI can be mitigated by ensuring λ/2 spacing between the MIMO antenna elements.…”

mentioning

confidence: 99%

“…However, the spacing significantly effects the compactness of the MIMO antennas which ultimately employ practical restrictions on the MIMO antenna to be integrated in indoor and outdoor portable devices. Besides, researchers have proposed various techniques to mitigate inter-element EMI without effecting the compactness of the MIMO antenna [4]- [19]. In addition, other wireless communication standards such as WiMAX, WLAN, and X-band downlink frequencies may electromagnetically interfere with the UWB spectrum and may affect systems' performance.…”

mentioning

confidence: 99%

“…A high gain two-element spanner shaped UWB-MIMO with edge truncation (for bandwidth enhancement) is proposed for UWB applications [4]. The two element UWB-MIMO antenna provides an isolation higher than 15 dB by placing elements 0.25 λ apart, but, expansion of the proposed antenna to eight element MIMO antenna significantly enlarges overall size.…”

mentioning

confidence: 99%

“…All the aforementioned UWB-MIMO designs have tradeoffs between design complexity, size, number of ports and bandwidth. The design reported in [4]- [12] are suitable for two ports or four ports in planar configuration and no guidelines are presented to extend the design. Also, if the design is extended for a large number of ports, it becomes too large to be deployed in practical scenarios.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Eight-Element Compact UWB-MIMO/Diversity Antenna with WLAN Band Rejection for 3G/4G/5G Communications

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et al. 2020

IEEE Open J. Antennas Propag.

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An eight element, compact Ultra Wideband− Multiple Input Multiple Output (UWB-MIMO) antenna capable of providing high data rates for future Fifth Generation (5G) terminal equipments along with the provision of necessary bandwidth for Third Generation (3G) and Fourth Generation (4G) communications that accomplishes band rejection from 4.85 to 6.35 GHz by deploying a Inductor Capacitor (LC) stub on the ground plane is presented. The incorporated stub also provides flexibility to reject any selected band as well as bandwidth control. The orthogonal placement of the printed monopoles permits polarization diversity and provides high isolation. In the proposed eight element UWB-MIMO/diversity antenna, monopole pair 3−4 are 180 • mirrored transform of monopole pair 1−2 which lie on the opposite corners of a planar 50 × 50 mm 2 substrate. Four additional monopoles are then placed perpendicularly to the same board leading to a total size of 50 × 50 × 25 mm 3 only. The simulated results are validated by comparing the measurements of a fabricated prototype. It was concluded that the design meets the target specifications over the entire bandwidth of 2 to 12 GHz with a reflection coefficient better than −10 dB (except the rejected band), isolation more than 17 dB, low envelope correlation, low gain variation, stable radiation pattern, and strong rejection of the signals in the Wireless Local Area Network (WLAN) band. Overall, compact and reduced complexity of the proposed eight element architecture, strengthens its practical viability for the diversity applications in future 5G terminal equipments amongst other MIMO antennas designs present in the literature. INDEX TERMS Band rejected, compact, diversity, envelope correlation coefficient , multiple input multiple output, ultrawide band, 5G communication, 5G terminal devices. I. INTRODUCTION W IRELESS broadband communication system such as Worldwide Interoperability for Microwave Access (WiMAX (3.4 to 3.6 GHz)), large capacity Microwave Relay Trunk Network (4.4 to 4.99 GHz), and Wireless Local Area Network (WLAN signals in 5.15 to 5.35 and 5.75 to 5.8225 GHz bands), impose a limited power spectral density of the low power and a high data rate

“…The placement of second monopole induced surface currents and affected the impedance match of the second monopole at lower frequencies, which was improved by inserting a U−shaped slot [4]. The polarization purity of element 1 is high while the polarization of element 2 is low.…”

Section: And Rmentioning

confidence: 99%

“…For instance, high speed and data rates in Wireless Personal Area Networks (WPAN) is only possible with UWB-MIMO technology [3]. One key specification of such MIMO antennas is that isolation between its elements should be more than 15 dB to ensure mitigation of inter-element Electromagnetic Interference (EMI) [4]- [8]. The inter-element EMI can be mitigated by ensuring λ/2 spacing between the MIMO antenna elements.…”

mentioning

confidence: 99%

“…However, the spacing significantly effects the compactness of the MIMO antennas which ultimately employ practical restrictions on the MIMO antenna to be integrated in indoor and outdoor portable devices. Besides, researchers have proposed various techniques to mitigate inter-element EMI without effecting the compactness of the MIMO antenna [4]- [19]. In addition, other wireless communication standards such as WiMAX, WLAN, and X-band downlink frequencies may electromagnetically interfere with the UWB spectrum and may affect systems' performance.…”

mentioning

confidence: 99%

“…A high gain two-element spanner shaped UWB-MIMO with edge truncation (for bandwidth enhancement) is proposed for UWB applications [4]. The two element UWB-MIMO antenna provides an isolation higher than 15 dB by placing elements 0.25 λ apart, but, expansion of the proposed antenna to eight element MIMO antenna significantly enlarges overall size.…”

mentioning

confidence: 99%

“…All the aforementioned UWB-MIMO designs have tradeoffs between design complexity, size, number of ports and bandwidth. The design reported in [4]- [12] are suitable for two ports or four ports in planar configuration and no guidelines are presented to extend the design. Also, if the design is extended for a large number of ports, it becomes too large to be deployed in practical scenarios.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Eight-Element Compact UWB-MIMO/Diversity Antenna with WLAN Band Rejection for 3G/4G/5G Communications

¹

,

²

,

³

et al. 2020

IEEE Open J. Antennas Propag.

View full text Add to dashboard Cite

An eight element, compact Ultra Wideband− Multiple Input Multiple Output (UWB-MIMO) antenna capable of providing high data rates for future Fifth Generation (5G) terminal equipments along with the provision of necessary bandwidth for Third Generation (3G) and Fourth Generation (4G) communications that accomplishes band rejection from 4.85 to 6.35 GHz by deploying a Inductor Capacitor (LC) stub on the ground plane is presented. The incorporated stub also provides flexibility to reject any selected band as well as bandwidth control. The orthogonal placement of the printed monopoles permits polarization diversity and provides high isolation. In the proposed eight element UWB-MIMO/diversity antenna, monopole pair 3−4 are 180 • mirrored transform of monopole pair 1−2 which lie on the opposite corners of a planar 50 × 50 mm 2 substrate. Four additional monopoles are then placed perpendicularly to the same board leading to a total size of 50 × 50 × 25 mm 3 only. The simulated results are validated by comparing the measurements of a fabricated prototype. It was concluded that the design meets the target specifications over the entire bandwidth of 2 to 12 GHz with a reflection coefficient better than −10 dB (except the rejected band), isolation more than 17 dB, low envelope correlation, low gain variation, stable radiation pattern, and strong rejection of the signals in the Wireless Local Area Network (WLAN) band. Overall, compact and reduced complexity of the proposed eight element architecture, strengthens its practical viability for the diversity applications in future 5G terminal equipments amongst other MIMO antennas designs present in the literature. INDEX TERMS Band rejected, compact, diversity, envelope correlation coefficient , multiple input multiple output, ultrawide band, 5G communication, 5G terminal devices. I. INTRODUCTION W IRELESS broadband communication system such as Worldwide Interoperability for Microwave Access (WiMAX (3.4 to 3.6 GHz)), large capacity Microwave Relay Trunk Network (4.4 to 4.99 GHz), and Wireless Local Area Network (WLAN signals in 5.15 to 5.35 and 5.75 to 5.8225 GHz bands), impose a limited power spectral density of the low power and a high data rate

A WLAN band-notched compact four element UWB MIMO antenna

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et al. 2020

Int J RF Microw Comput Aided Eng

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No abstract

A four element, planar, compact UWB MIMO antenna with WLAN band rejection capabilities

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et al. 2020

Micro & Optical Tech Letters

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A planar, compact UWB MIMO antenna with four elements that accomplish band rejection from 4.91 to 6.41 GHz is presented. Rejection is accomplished using an L‐C stub connected to the ground plane. The length of the stub is changed to reject the band starting from 2.5 GHz to above 8.8 GHz. The perpendicular placement of the elements enables polarization diversity and attains high isolation. Elements 3 and 4 are 180° mirrored transforms of elements 1 and 2 on the opposite corners of the substrate. The antenna measures 50 × 50 mm2 only with all four elements placed. The simulated results are validated by measurements of a fabricated prototype. The design attains the targeted specifications over the entire bandwidth of 2 to 12 GHz with a reflection coefficient better than −10 dB (except the rejected band), isolation more than 17 dB, low envelope correlation, low gain variation and strong rejection of the signals in the WLAN band. The small size and reduced complexity to obtain WLAN rejection makes the proposed design very useful for diversity applications and portable handheld devices with MIMO antennas as designed by panorama antenna.

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