scholarly journals Antenna Mutual Coupling Suppression Over Wideband Using Embedded Periphery Slot for Antenna Arrays

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 198 ◽  
Author(s):  
Mohammad Alibakhshikenari ◽  
Bal Virdee ◽  
Panchamkumar Shukla ◽  
Chan See ◽  
Raed Abd-Alhameed ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Communication Systems ◽  
Mutual Coupling ◽  
Low Cost ◽  
New Approach ◽  
Mimo Communication ◽  
Low Profile ◽  
X Band ◽  
Antenna Configuration ◽  
Patch Attributes

This paper presents a new approach to suppress interference between neighbouring radiating elements resulting from surface wave currents. The proposed technique will enable the realization of low-profile implementation of highly dense antenna configuration necessary in SAR and MIMO communication systems. Unlike other conventional techniques of mutual coupling suppression where a decoupling slab is located between the radiating antennas the proposed technique is simpler and only requires embedding linear slots near the periphery of the patch. Attributes of this technique are (i) significant improvement in the maximum isolation between the adjacent antennas by 26.7 dB in X-band and >15 dB in Ku and K-bands; (ii) reduction in edge-to-edge gap between antennas to 10 mm (0.37 λ); and (iii) improvement in gain by >40% over certain angular directions, which varies between 4.5 dBi and 8.2 dBi. The proposed technique is simple to implement at low cost.

scholarly journals Antenna Mutual Coupling Suppression Over Wideband Using Embedded Periphery Slot for Antenna Arrays

2018 ◽  
Author(s):  
Mohammad Alibakhshikenari ◽  
Bal Singh Virdee ◽  
Chan Hwang See ◽  
Raed Abd-Alhameed ◽  
Francisco Falcone ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Communication Systems ◽  
Mutual Coupling ◽  
Low Cost ◽  
New Approach ◽  
Mimo Communication ◽  
Low Profile ◽  
X Band ◽  
Antenna Configuration ◽  
Patch Attributes

This paper presents a new approach to suppress interference between neighbouring radiating elements resulting from surface wave currents. The proposed technique will enable the realization of low-profile implementation of highly dense antenna configuration necessary in SAR and MIMO communication systems. Unlike other conventional techniques of mutual coupling suppression where decoupling slab is located between the radiating antennas the proposed technique is simpler and only requires embedding linear slots near the periphery of the patch. Attributes of this technique are (i) significant improvement in the maximum isolation between the adjacent antennas by 26.7 dB in X-band, & >15 dB in Ku and K-bands; (ii) reduction in edge-to-edge gap between antennas to 10 mm (0.37λ); and (iii) improvement in gain by >40% over certain angular directions, which varies between 4.5 dBi to 8.2 dBi. The proposed technique is simple to implement at low-cost.

scholarly journals Design and Analysis of a Photonic Crystal Based Planar Antenna for THz Applications

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1941
Author(s):  
Inzamam Ahmad ◽  
Sadiq Ullah ◽  
Shakir Ullah ◽  
Usman Habib ◽  
Sarosh Ahmad ◽  
...  
Keyword(s):  
Communication Systems ◽  
High Speed ◽  
Low Cost ◽  
High Gain ◽  
Propagation Loss ◽  
Smart Devices ◽  
Frequency Range ◽  
Low Profile ◽  
Unit Cells ◽  
Thz Applications

Modern advancements in wearable smart devices and ultra-high-speed terahertz (THz) communication systems require low cost, low profile, and highly efficient antenna design with high directionality to address the propagation loss at the THz range. For this purpose, a novel shape, high gain antenna for THz frequency range applications is presented in this work. The proposed antenna is based on a photonic bandgap (PBG)-based crystal polyimide substrate which gives optimum performance in terms of gain (9.45 dB), directivity (9.99 dBi), and highly satisfactory VSWR (<1) at 0.63 THz. The performance of the antenna is studied on PBGs of different geometrical configurations and the results are compared with the antenna based on the homogeneous polyimide-based substrate. The effects of variations in the dimensions of the PBG unit cells are also studied to achieve a −10 dB bandwidth of 28.97 GHz (0.616 to 0.64 THz).

scholarly journals A low profile dual-polarized tightly coupled dipole array of C-X-band.

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
A.I. Semenikhin ◽  
◽  
D.V. Semenikhina ◽  
Y.V. Yukhanov ◽  
◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Extended Period ◽  
Ultra Wideband ◽  
Low Profile ◽  
Small Height ◽  
X Band ◽  
Tightly Coupled ◽  
Feed Network ◽  
Design Requirements ◽  
Dual Polarized

Modern low-profile ultra-wideband antenna arrays are tightly coupled dipole array (TCDA). The paper presents a model of a low-profile dual-polarized of planar-type TCDA for operation in the 4÷12 GHz band with scanning in the sector of angles ±30° in two principal planes. In contradistinction to the well-known TCDAs, the proposed array is distinguished by its simplicity of design, the absence of balancing transformers, the extended period of 12x12mm, and the small height of 5.63mm (including the thickness of the upper homogeneous non-perforated matching layers of 1.67mm and the substrate layers of 3.968mm. The selected array period allows taking into account the special design requirements of the feed network for the array elements. The broadband of the TCDA (at VSWR<3.6) is achieved using the upper matching layers. These layers also serve as the radome for the array.

Dual-Polarized Antenna Arrays with CMOS Power Amplifiers for SiP Integration at W-Band

Frequenz ◽  
2017 ◽  
Vol 71 (9-10) ◽  
pp. 463-472
Author(s):  
Malte Giese ◽  
Sönke Vehring ◽  
Georg Böck ◽  
Arne F. Jacob
Keyword(s):  
Antenna Arrays ◽  
Communication Systems ◽  
Low Cost ◽  
Beam Steering ◽  
Active Antenna ◽  
Critical System ◽  
Power Added Efficiency ◽  
Front End ◽  
W Band ◽  
Data Rates

Abstract This paper presents requirements and front-end solutions for low-cost communication systems with data rates of 100 Gbit/s. Link budget analyses in different mass-market applications are conducted for that purpose. It proposes an implementation of the front-end as an active antenna array with support for beam steering and polarization multiplexing over the full W-band. The critical system components are investigated and presented. This applies to a transformer coupled power amplifier (PA) in 40 nm bulk CMOS. It shows saturated output power of more than 10 dBm and power-added-efficiency of more than 10 % over the full W-band. Furthermore, the performance of microstrip-to-waveguide transitions is shown exemplarily as an important part of the active antenna as it interfaces active circuitry and antenna in a polymer-and-metal process. The transition test design shows less than 0.9 dB insertion loss and more than 12 dB return loss for the differential transition over the full W-band.

scholarly journals Slotted E-Shaped Meta-Material Decoupling Slab for Densely Packed MIMO Antenna Arrays

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 873
Author(s):  
Karim H. Moussa ◽  
Ahmed S. I. Amar ◽  
Mohamed Mabrouk ◽  
Heba G. Mohamed
Keyword(s):  
Antenna Arrays ◽  
Communication Systems ◽  
Mutual Coupling ◽  
Spatial Diversity ◽  
Center Frequency ◽  
Wireless Communication Systems ◽  
Mimo Antenna ◽  
Microstrip Patch ◽  
Multiple Input ◽  
Array Gain

In contemporary wireless communication systems, the multiple-input and multiple-output systems are extensively utilized due to their enhanced spectral efficiency and diversity. Densely packed antenna arrays play an important role in such systems to enhance their spatial diversity, array gain, and beam scanning capabilities. In this article, a slotted meta-material decoupling slab (S-MTM-DS) with dual reflexes slotted E-shapes and an inductive stub is proposed. Its function was validated when located between two microstrip patch antenna elements to reduce the inter-element spacing, the mutual coupling, the return losses, and manufacturing costs due to size reduction. A prototype is simply fabricated in a volume of 67.41 × 33.49 × 1.6 mm3 and frequency-span measured from 8.4:11 GHz. At 9.4 GHz frequency, the spaces between the transmitting elements are decreased to 0.57 of the free space wavelength. When the proposed isolation S-MTM-DS is applied, the average isolation among them is measured to be −36 dB, the operational bandwidth is enhanced to be 1.512 GHz, the fractional bandwidth improved to be 16.04%, and the return losses are decreased to be −26.5 dB at 9.4 GHz center frequency. Consequently, the proposed design has the potential to be implemented simply in wireless contemporary communication schemes.

scholarly journals Reduction of Mutual Coupling between Radiating Elements of an Array Antenna Using EBG Electromagnetic Band Structures

2021 ◽  
pp. 91-98
Author(s):  
Sara Said ◽  
◽  
Abdenacer Es-salhi ◽  
Mohammed Elhitmy
Keyword(s):  
Communication Systems ◽  
Mutual Coupling ◽  
Array Antenna ◽  
Wireless Communication Systems ◽  
Electromagnetic Band Gap ◽  
High Impedance ◽  
Unit Cells ◽  
Antenna Configuration ◽  
Element Array ◽  
High Impedance Surface

In this paper, a new array antenna configuration based on Electromagnetic Band Gap (EBG) structures has been proposed for 3.5GHz wireless communication systems. The proposed slotted EBG structure, high impedance surface (SHI), consists of three squares and a square ring deposited on a substrate (Rogers RO4350) which has a relative permittivity of 10.2 and a thickness of 1.27mm. Initially a matrix of 3×7 unit cells of EBG structures is introduced between two patches of an array and then a matrix of 3×14 unit cell of EBG structures is integrated between eight patches, which resonate around 3.5GHz (Wi MAX). The insertion of these structures between the radiating elements of an array antenna reduces the mutual coupling and antenna dimensions by approximately (8dB, 11%) and (12 dB, 5%) respectively for two, eight elements array antenna. In addition, the directivity has been slightly improved in the presence of EBG structures, from 4.52dB to 6.09dB for a two-element array antenna, and from 8.18dB to 8.4dB for an eight-element antenna.

scholarly journals Mitigation of mutual coupling in microstrip antenna arrays

2019 ◽  
pp. 16-24
Author(s):  
K. Prahlada Rao ◽  
R. M. Vani ◽  
P. V. Hunagund
Keyword(s):  
Antenna Arrays ◽  
Mutual Coupling ◽  
Low Cost ◽  
Ground Plane ◽  
Dielectric Substrate ◽  
Array Antenna ◽  
Directional Radiation ◽  
Radiation Properties ◽  
Band Gap Structure ◽  
Microstrip Array Antenna

This article demonstrates the alleviation of mutual coupling of a simple and low-cost four-element microstrip array antenna by loading I-shaped slot-type electromagnetic band gap structure in the ground plane. FR-4 glass epoxy is used as dielectric substrate. Moreover, the proposed array antenna shows a better performance in terms of multi-band resonance. The antenna is resonating at four frequencies and a virtual size reduction of 78.48% is obtained. The designed array antenna possesses directional radiation properties. Mentor Graphics IE3D software is used to design and simulate the designed antennas and the measured results are obtained using vector network analyser.

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