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

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.

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

International Journal of Antennas and Propagation ◽

10.1155/2019/2102593 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10 ◽

Cited By ~ 1

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.

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Dual-Circularly Polarized 60 GHz Beam-Steerable Antenna Array with 8 × 8 Butler Matrix

Applied Sciences ◽

10.3390/app10072413 ◽

2020 ◽

Vol 10 (7) ◽

pp. 2413 ◽

Cited By ~ 1

Author(s):

Yuntae Park ◽

Jihoon Bang ◽

Jaehoon Choi

Keyword(s):

Circular Polarization ◽

Antenna Array ◽

Mutual Coupling ◽

Beam Steering ◽

60 Ghz ◽

Circularly Polarized ◽

Butler Matrix ◽

Left Handed ◽

Steerable Antenna ◽

The Right

A beam-steerable dual-circularly polarized 60 GHz antenna array is proposed. A 1 × 4 dual-fed stacked patch antenna array is integrated with an 8 × 8 Butler matrix. By utilizing the 8 × 8 Butler matrix, the proposed antenna array generates dual-circular polarization with beam-steering capability. The proposed antenna array system demonstrates good reflection coefficients in the frequency band ranging from 55.3 GHz to 64.9 GHz and has a mutual coupling of less than −10 dB over the frequency range of 57.5 GHz–63.2 GHz. At 60 GHz, the maximum gains and beam-steering angles for input ports 2, 4, 5, and 7 are 9.39 dBi at −38°, 10.67 dBi at −11°, 10.63 dBi at +11°, and 9.38 dBi at +39°, respectively. It is also demonstrated that the dual-polarization is well formed by switching the excitation ports. The right-handed circular polarization (RHCP) is formed when four ports from port 1 to port 4 are excited and left-handed circular polarization (LHCP) is formed when four ports from port 5 to port 8 are excited. The proposed antenna array system could be a good candidate for millimeter-wave 5G applications that require wide beam coverage and polarization diversity.

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A Compact Ku-Band Active Electronically Steerable Antenna with Low-Cost 3D T/R Module

Wireless Communications and Mobile Computing ◽

10.1155/2019/5287679 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8

Author(s):

Zheng Xu ◽

Chengxiang Hao ◽

Kuiwen Xu ◽

Shichang Chen

Keyword(s):

Antenna Array ◽

System Integration ◽

Low Cost ◽

Axial Ratio ◽

Antenna System ◽

Measurement Results ◽

Steerable Antenna ◽

Vertical Interconnection ◽

Electronic Steering ◽

Ku Band

This paper presents a novel compact Ku-band active electronically steerable antenna array design with a low-cost and integrated T/R 3D module employed for airborne synthetic aperture radar (SAR) systems. The entire system adopts 3D multilayer technology with vertical interconnection to construct the hermetically packaging RF modules. By assembling different multifunctional modules into a whole multilayer board, the 3D T/R technique greatly improves the system integration and reduces implementation cost and size. Besides, a wideband circular polarized antenna array was designed in LTCC and connected to the proposed T/R modules to form a complete AESA. The whole proposed antenna system has been fabricated and experimentally investigated. Measurement results showed very good phased array performances in terms of gain, axial ratio, and radiating patterns. The low-cost, lightweight, and low-power features exhibited by the proposed design validate its applicability for weight and power constrained platforms with great electronic steering ability.

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Design of High Gain Low Cost Beam-Steering Reflectarray Antenna

2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting ◽

10.1109/apusncursinrsm.2019.8888928 ◽

2019 ◽

Author(s):

Shafaq Kausar ◽

Saeideh Shad ◽

Ahmed Kausar ◽

Hani Mehrpouyan

Keyword(s):

Low Cost ◽

Beam Steering ◽

High Gain ◽

Reflectarray Antenna

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High gain/ efficiency 2D-dielectric resonator antenna array for low cost mm-wave systems

2011 IEEE International Symposium on Antennas and Propagation (APSURSI) ◽

10.1109/aps.2011.5996628 ◽

2011 ◽

Cited By ~ 2

Author(s):

W. M. Abdel-Wahab ◽

Safieddin Safavi-Naeini ◽

D. Busuioc

Keyword(s):

Antenna Array ◽

Dielectric Resonator ◽

Low Cost ◽

High Gain ◽

Dielectric Resonator Antenna

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A Fully-Integrated 180 nm CMOS 1.2 V Low-Dropout Regulator for Low-Power Portable Applications

Electronics ◽

10.3390/electronics10172108 ◽

2021 ◽

Vol 10 (17) ◽

pp. 2108

Author(s):

Jorge Pérez-Bailón ◽

Belén Calvo ◽

Nicolás Medrano

Keyword(s):

Low Voltage ◽

Low Cost ◽

Complementary Metal Oxide Semiconductor ◽

Cmos Technology ◽

High Gain ◽

Oxide Semiconductor ◽

Fully Integrated ◽

Low Voltage Operation ◽

Error Amplifier ◽

Ldo Regulator

This paper presents the design and postlayout simulation results of a capacitor-less low dropout (LDO) regulator fully integrated in a low-cost standard 180 nm Complementary Metal-Oxide-Semiconductor (CMOS) technology which regulates the output voltage at 1.2 V from a 3.3 to 1.3 V battery over a –40 to 120°C temperature range. To meet with the constraints of system-on-chip (SoC) battery-operated devices, ultralow power (Iq = 8.6 µA) and minimum area consumption (0.109 mm2) are maintained, including a reference voltage Vref = 0.4 V. It uses a high-gain dynamically biased folded-based error amplifier topology optimized for low-voltage operation that achieves an enhanced regulation-fast transient performance trade-off.

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Low-Cost High-Gain and Broadband Substrate- Integrated-Waveguide-Fed Patch Antenna Array for 60-GHz Band

IEEE Transactions on Antennas and Propagation ◽

10.1109/tap.2014.2350509 ◽

2014 ◽

Vol 62 (11) ◽

pp. 5531-5538 ◽

Cited By ~ 96

Author(s):

Yujian Li ◽

Kwai-Man Luk

Keyword(s):

Antenna Array ◽

Patch Antenna ◽

Low Cost ◽

High Gain ◽

Substrate Integrated Waveguide ◽

60 Ghz

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E-Band Beam-Steerable and Scalable Phased Antenna Array for 5G Access Point

International Journal of Antennas and Propagation ◽

10.1155/2018/4267053 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

Md. Mazidul Islam ◽

Mikko Leino ◽

Rasmus Luomaniemi ◽

Jinsong Song ◽

Risto Valkonen ◽

...

Keyword(s):

Antenna Array ◽

Phase Shifter ◽

Low Cost ◽

Beam Steering ◽

Active Phase ◽

Access Point ◽

Horn Antenna ◽

Phase Shifters ◽

Phased Antenna Array ◽

Feed Network

This paper presents a new implementation of the beam-steerable two-dimensional phased antenna array for the forthcoming 5G networks. The antenna enables easy integration of phase shifters and other active electronics on a single PCB, low-loss feed network, low profile, and beam steering in both azimuth and elevation plane. In addition, the antenna is scalable in the number of elements and it can be made compatible with low-cost mass production in plastic injection molding with a metal coating. The antenna consists of a rectangular waveguide feed network, waveguide-to-PCB transitions, phase shifters on a PCB, and horn antenna radiating elements. The parts have been first designed and simulated individually and the operation of the whole structure is then verified by electromagnetic simulations. The phase shifter used in this work is a meandered microstrip line section, but the structure also enables the implementation of active phase shifters. A four-by-four antenna array prototype was manufactured. The beam-steering properties of the phased antenna array have been tested with radiation pattern measurements at 72.5 GHz, and the measured gains are compared with the simulated ones. The measured gains are 15.2 and 11.2 dBi for the boresight beam, and the beam was steered to 40°.

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