scholarly journals Wide-Band High-Gain DGS Antenna System for Indoor Robot Positioning

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Lu Bai ◽  
Chenglie Du
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Wide Band ◽  
High Gain ◽  
Antenna System ◽  
Fusion Technology ◽  
Positioning Systems ◽  
Signal Fusion ◽  
Wireless Signal ◽  
Robot Positioning

Based on multisource wireless signal fusion technology, the autonomous positioning systems of robots have been widely employed. How to design a compact compostable antenna array for indoor robot positioning is still a problem. In this study, we proposed a compact ultrathin antenna unit that effectively reduces the mutual coupling between any adjacent units, while covering most of the existing communication bands, including 2G/3G/4G/Wi-Fi, which will greatly reduce the size of the positioning antenna array. The proposed antenna system has been employed for positioning purpose with high-gain, wide-frequency band and limited size. It necessarily improves the accuracy of positioning signal from various unknown sources and finally accomplishes its autonomous positioning function.

scholarly journals High-Gain Textile Antenna Array System for Off-Body Communication

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Maria Lucia Scarpello ◽  
Luigi Vallozzi ◽  
Hendrik Rogier ◽  
Dries Vande Ginste
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Low Cost ◽  
Beam Steering ◽  
High Gain ◽  
Antenna System ◽  
Fully Integrated ◽  
Textile Antenna ◽  
Coupling Characteristics ◽  
The Stability

A novel high-gain textile antenna array system, fully integrated into a rescue-worker’s vest and operating in the Industrial, Scientific, and Medical wireless band (2.4–2.4835 GHz), is presented. The system comprises an array consisting of four tip-truncated equilateral triangular microstrip patch antennas (ETMPAs), a power divider, line stretchers, and coaxial cables. The array is vertically positioned on the human torso to produce a narrow beam in elevation, as such reducing fading and allowing to steer the maximum gain in a small angular sector centered around the broadside direction. To allow simple low-cost beam steering, we specifically minimize mutual coupling by using a relative large distance between the patches and by selecting the ETMPA element as the most suited topology from three potential patch geometries. Moreover, we investigate the stability of return loss and mutual coupling characteristics under different relative humidity conditions, when bending the array, when placing the system on-body, and when covering it by different textile layers. Reflection coefficient and gain patterns are simulated and measured for the antenna system in free space and placed on the human body.

scholarly journals Development of High Gain Circularly Polarized Antenna Array for RF Renewable Energy

2018 ◽  
Vol 7 (2.29) ◽  
pp. 1033
Author(s):  
Chia Chao Kang ◽  
Fatin Ayuni ◽  
Chia Yang Kang
Keyword(s):  
Renewable Energy ◽  
Antenna Array ◽  
High Gain ◽  
Antenna System ◽  
Green Energy ◽  
Field Analysis ◽  
Antenna Structure ◽  
Circularly Polarize ◽  
Full Wave ◽  
Entire Structure

RF energy has become very attractive in the engineering and scientist field for green substainbility. A novel high gain circularly polarize antenna array for RF renewable energy is presented in this paper. The antenna structure was investigated using full wave electromagnetic field analysis. Finally, the entire structure of the antenna array was fabricated and measured. A comparison between simulated and measured results has been observed. The results show that high gain 5.0dBi at 956MHz had been achieved for circularly polarize antenna array and the works concludes that the investigation of high gain antenna system was successful and it can use as an alternatif sources for renewable green energy. The antenna structure that presented is also an important part of the IoT and 5G development.

Diversity performance analysis of four port triangular slot MIMO antenna for WiBro and ultrawide band (UWB) applications

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Praveen Vummadisetty Naidu ◽  
Sai haranadh Akkapanthula ◽  
Maheshbabu Dhanekula ◽  
Neelima Vummadisetty ◽  
Arvind Kumar
Keyword(s):  
Mutual Coupling ◽  
Group Delay ◽  
Mimo System ◽  
Wide Band ◽  
Cost Effective ◽  
Antenna System ◽  
Ultra Wide Band ◽  
Mimo Antenna ◽  
Capacity Loss ◽  
Uwb Applications

Abstract This article discusses a 4-port micro-strip fed MIMO Antenna system with a triangular slot and an inverted L shape strip has been designed and analysed for both 2.3 GHz WiBro and Ultra-wide-band applications. The suggested antenna has been etched on a cost-effective epoxy (FR-4) substrate having ϵ r ${{\epsilon}}_{r}$  = 4.4 with an overall dimension of 45 × 45 × 1.6 mm3. Mutual coupling of −18 dB between the radiators has been obtained by orthogonal placement of radiators. From the simulated and practical results, the proposed compact MIMO system operates in frequency bands 2.26–2.42 GHz and 3.7–10.8 GHz respectively. The proposed small triangular MIMO system operates with an ECC less than 0.005 with an acceptable channel capacity loss <0.5 bits/s/Hz. Further, the diversity characteristics like DG, MEG, TARC, and group delay have been calculated and are presented in this paper.

scholarly journals Two-Element Tapered Slot Antenna Array for Terahertz Resonant Tunneling Diode Oscillators

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Jianxiong Li ◽  
Yunxiang Li ◽  
Weiguang Shi ◽  
Haolin Jiang ◽  
Luhong Mao
Keyword(s):  
Antenna Array ◽  
Integrated Circuit ◽  
Resonant Tunneling ◽  
Mutual Coupling ◽  
Beam Width ◽  
High Gain ◽  
Resonant Tunneling Diode ◽  
Slot Antenna ◽  
Tunneling Diode ◽  
Metal Insulator Metal

Two-element tapered slot antenna (TSA) array for terahertz (THz) resonant tunneling diode (RTD) oscillators is proposed in this paper. The proposed TSA array has the advantages of both the high directivity and high gain at the horizontal direction and hence can facilitate the horizontal communication between the RTD oscillators and other integrated circuit chips. A MIM (metal-insulator-metal) stub with a T-shaped slot is used to reduce the mutual coupling between the TSA elements. The validity and feasibility of the proposed TSA array have been simulated and analyzed by the ANSYS/ANSOFT’s High Frequency Structure Simulator (HFSS). Detailed modeling approaches and theoretical analysis of the proposed TSA array have been fully addressed. The simulation results show that the mutual coupling between the TSA elements is reduced below −40 dB. Furthermore, at 500 GHz, the directivity, the gain, and the half power beam width (HPBW) at theE-plane of the proposed TSA array are 12.18 dB, 13.09 dB, and 61°, respectively. The proposed analytical method and achieved performance are very promising for the antenna array integrated with the RTD oscillators at the THz frequency and could pave the way to the design of the THz antenna array for the RTD oscillators.

scholarly journals Compact Ultra-Wide Band MIMO Antenna System for Lower 5G Bands

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Haitham AL-Saif ◽  
Muhammad Usman ◽  
Muhammad Tajammal Chughtai ◽  
Jamal Nasir
Keyword(s):  
Mutual Coupling ◽  
Return Loss ◽  
Wide Band ◽  
Antenna System ◽  
Ultra Wide Band ◽  
Center Frequency ◽  
Mimo Antenna ◽  
Total Structure ◽  
Good Agreement ◽  
Array Geometry

This paper presents a novel compact 2 × 2 planar MIMO antenna system with ultra-wide band capability. Antenna system is specifically designed to target lower 5th generation operating bands ranging from 2 GHz to 12 GHz. This band also covers the IEEE 802.11 a/b/g/n/ac. The antenna array geometry has been simulated using CST MWS. The design is extremely miniaturized with total structure size of 13×25×0.254 mm3. The simulated and measured results have been presented. Measured and simulated return loss values for designed antenna are less than −10 dB over the operating band and lowest values of −35 dB and −32.5 dB can been seen at 5.2 GHz and 9.2 GHz, respectively, whereas at the center frequency the return loss is −25.2 dB. The mutual coupling between both elements is less than −20 dB over the transmission bandwidth. Simulated and measured radiation patterns in E and H planes at center frequency show nearly isotropic far fields. The maximum gain is measured as 4.8 dB. Promising results of Envelope Correlation Coefficient and gain diversity of the design have been achieved. Simulated and measured results are found in good agreement. The fractional bandwidth of antenna is measured as 143.2% which satisfies its ultra-wide band response.

Broadband antipodal tapered slot antenna array with low mutual coupling and high gain properties

2019 ◽  
Vol 13 (10) ◽  
pp. 1653-1659 ◽  
Author(s):  
Ziyu Xu ◽  
Helin Yang ◽  
Qisheng Zhang ◽  
Linyan Guo ◽  
Zhengwei Yang
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
High Gain ◽  
Slot Antenna
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