scholarly journals Ultra-wideband slot-loaded planar antenna for future 5G millimeter wave applications

Tehnika ◽  
2021 ◽  
Vol 76 (5) ◽  
pp. 623-628
Author(s):  
Surendra Gupta ◽  
Amit Bage ◽  
Milka Potrebić ◽  
Lakhindar Murmu
Keyword(s):  
Millimeter Wave ◽  
Ground Plane ◽  
Wave Spectrum ◽  
Ultra Wideband ◽  
Planar Antenna ◽  
Cross Polarization ◽  
Defected Ground Structure ◽  
Antenna Performance ◽  
The Given ◽  
Polarization Level

An ultra-wideband, compact planar antenna with defected ground structure (DGS) has been presented in this article for future 5G millimeter-wave applications. The proposed antenna overcomes the limitation of bandwidth of the conventional microstrip patch antenna (typically < 5%). The antenna exhibits an ultra-wideband characteristic covering frequency band from 21.3 GHz to 40.6 GHz which makes the fractional bandwidth of 62.36%. The antenna performance is enhanced by etching slots on the patch and incorporating defect on the ground plane. The antenna achieves gain greater than 4.01 dBi and radiation efficiency greater than 95% throughout the operating band. In the given band it also exhibits very low cross-polarization level as well as stable radiation performance. This antenna is designed to operate in n257, n258, n260 and n261 5G millimeter-wave spectrum.

scholarly journals A High-Isolation Dual-Polarization Substrate-Integrated Fabry-Pérot Cavity Antenna

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Chang Chen ◽  
Bo-Liang Liu ◽  
Ling Ji ◽  
Wei-Dong Chen
Keyword(s):  
Near Field ◽  
Ground Plane ◽  
Cross Polarization ◽  
Dual Polarization ◽  
High Isolation ◽  
Fabry Perot ◽  
Feeding Structure ◽  
Operating Bandwidth ◽  
High Degree ◽  
Polarization Level

A dual-polarization substrate-integrated Fabry-Pérot cavity (SI-FPC) antenna is presented in this paper. The patch embedded in SI-FPC is excited with a near-field coupled feeding structure for V-polarization and with a slot-coupled feeding structure for H-polarization. The feeding structures are separated by a ground plane to improve the isolation between the ports. As a design example, an antenna operating at 10.0 GHz is fabricated and measured. A high degree of port isolation (<−40 dB) over the whole operating bandwidth (9.5–10.2 GHz) and good cross-polarization level (>25 dB) can be achieved.

scholarly journals Ultra-Wideband Differential Fed Hybrid Antenna With High-Cross Polarization Discrimination for Millimeter Wave Applications

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 80673-80683
Author(s):  
Magid Alzidani ◽  
Islam Afifi ◽  
Muftah Asaadi ◽  
Abdel-Razik Sebak
Keyword(s):  
Millimeter Wave ◽  
Ultra Wideband ◽  
Cross Polarization

scholarly journals On the Design and Analysis of Compact Super-Wideband Quad Element Chiral MIMO Array for High Data Rate Applications

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1995
Author(s):  
Ananda Venkatesan Boologam ◽  
Kalimuthu Krishnan ◽  
Sandeep Kumar Palaniswamy ◽  
C. T. Manimegalai ◽  
Sabitha Gauni
Keyword(s):  
Mutual Coupling ◽  
Performance Metrics ◽  
Ground Plane ◽  
Unit Element ◽  
Ultra Wideband ◽  
Cumulative Distribution ◽  
Impedance Bandwidth ◽  
Defected Ground Structure ◽  
High Data ◽  
Rectangular Slit

This paper presents a compact, bouquet-inspired, four-element MIMO array for super wideband (SWB) applications. The proposed unit element monopole antenna has compact geometry, and it is deployed by the fusion of an elliptical and circular-shaped radiator. The convoluted geometry and semi-elliptical ground plane, along with the narrow rectangular slit defected ground structure, provides a wide impedance bandwidth. The designed unit cell has the dimensions of 32 mm × 20 mm × 0.8 mm, operates from 2.9 to 30 GHz (S11 ≤ −10 dB) and provides a bandwidth dimension ratio (BDR) of 2894. The proposed low-profile diversity array without any decoupling structures consists of four orthogonally placed, uncorrelated antennas with an inter element spacing of 0.05 λ0, occupies an area of 57 mm × 57 mm and provides dual polarization. The performance metrics of the diversity array were validated for frequencies over ultra-wideband, using mutual coupling characteristics, envelope correlation coefficient (ECC) by far-field radiation, diversity gain (DG), total active reflection coefficient (TARC), channel capacity loss (CCL) and cumulative distribution function (CDF) analysis. The measured mutual coupling over the operating band was less than −18 dB, the ECC was less than 0.004 and the TARC was less than −15 dB, and a better CCL of ˂0.28 bits/s/Hz was achieved by the fabricated antenna.

Omnidirectional multi-band stacked microstrip patch antenna with wide impedance bandwidth and suppressed cross-polarization

2016 ◽  
Vol 9 (3) ◽  
pp. 629-638 ◽  
Author(s):  
Jaishanker Prasad Keshari ◽  
Binod Kumar Kanaujia ◽  
Mukesh Kumar Khandelwal ◽  
Pritam Singh Bakariya ◽  
Ram Mohan Mehra
Keyword(s):  
Ground Plane ◽  
Impedance Bandwidth ◽  
Triple Resonance ◽  
Patch Antennas ◽  
Cross Polarization ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Resonance Frequencies ◽  
Polarization Level ◽  
Triple Band

In this paper, triple-band stacked microstrip patch antennas (MPAs) are presented with wide impedance bandwidth and suppressed cross-polarization level. Triangular and circular shaped slots are embedded in the patch of antenna. Slot-loaded microstrip patches are fed with meandered microstrip line supported by a semi-ground plane structure. Triangular shaped slot-loaded MPA shows triple resonance at frequencies 2.2, 4.45, and 5.3 GHz having bandwidth of 45.9, 19.23, and 15.67%, respectively. Circular shaped slot-loaded MPA also shows triple resonance at frequencies 2.2, 4.42, and 5.38 GHz having bandwidth of 50.24, 33.21, and 13.43%, respectively. Using circular slot in place of triangular; bandwidth of the first and the second band is improved by 4.34 and 13.98%, respectively. Both the proposed antennas show an omnidirectional radiation pattern at all three resonance frequencies in the xz-plane with almost 0 dBi gain. Both the proposed antennas are fabricated on a FR-4 epoxy substrate and show a minimum level of cross-polarization radiations.

scholarly journals Defected Ground Structure: Fundamentals, Analysis, and Applications in Modern Wireless Trends

2017 ◽  
Vol 2017 ◽  
pp. 1-22 ◽  
Author(s):  
Mukesh Kumar Khandelwal ◽  
Binod Kumar Kanaujia ◽  
Sachin Kumar
Keyword(s):  
Basic Concept ◽  
Ground Plane ◽  
Microwave Circuits ◽  
Planar Waveguides ◽  
Cross Polarization ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Planar Circuits ◽  
Narrow Bandwidth

Slots or defects integrated on the ground plane of microwave planar circuits are referred to as Defected Ground Structure. DGS is adopted as an emerging technique for improving the various parameters of microwave circuits, that is, narrow bandwidth, cross-polarization, low gain, and so forth. This paper presents an introduction and evolution of DGS and how DGS is different from former technologies: PBG and EBG. A basic concept behind the DGS technology and several theoretical techniques for analysing the Defected Ground Structure are discussed. Several applications of DGS in the field of filters, planar waveguides, amplifiers, and antennas are presented.

A compact ultra-wideband square and circular slot ground plane planar antenna with a modified circular patch

2021 ◽  
pp. 1-6
Author(s):  
Manohar Golait ◽  
Manish Varun Yadav ◽  
Balasaheb H. Patil ◽  
Sudeep Baudha ◽  
Lokesh Kumar Bramhane
Keyword(s):  
Ground Plane ◽  
High Gain ◽  
Ultra Wideband ◽  
Planar Antenna ◽  
Fractional Bandwidth ◽  
Peak Efficiency ◽  
Circular Patch ◽  
X Band ◽  
Uwb Applications ◽  
Ku Band

Abstract A compact ultra-wideband (UWB) square and circular slot ground plane planar antenna with a modified circular patch for UWB communication is presented. This antenna has a low reflection coefficient and high gain in the range of 8.94 GHz, starting from 2.85 to 11.79 GHz. The proposed antenna demonstrates UWB behavior with electrically small dimensions of 0.18 λ0×0.14 λ0×0.015 λ0 (λ0 is the free-space wavelength at 2.85 GHz). The fractional bandwidth of the antenna is 122.1%, with stable radiations. The antenna's maximum gain stands at 2.79 dBi, and the antenna's peak efficiency stands at 72%, respectively. It is lightweight, compact, and easy to manufacture. Hence, it can be used for the complete range of UWB applications and covers Wi-Max/WLAN/ X-Band and Ku-Band.

A Miniaturized High-Gain (MHG) Ultra-Wideband Unidirectional Monopole Antenna for UWB Applications

2019 ◽  
Vol 28 (13) ◽  
pp. 1950230 ◽  
Author(s):  
J. Vijayalakshmi ◽  
G. Murugesan
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
High Gain ◽  
Substrate Material ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Defected Ground Structure ◽  
Compact Antenna ◽  
Overlay Design ◽  
Uwb Applications

A miniaturized high-gain (MHG) ultra-wideband (UWB) unidirectional monopole antenna with defected ground structure (DGS) is designed for ultra-wideband applications. The MHG antenna is printed on the FR4 substrate material with an overall size of 26.6-mm [Formula: see text] 29.3-mm [Formula: see text] 1.6-mm, which operates over the UWB frequency range and achieves the bandwidth between 3.1[Formula: see text]GHz and 10.6[Formula: see text]GHz. This high-gain unidirectional antenna exhibits a peak gain of 7.20[Formula: see text]dB with an efficiency of 95%. The compact antenna is a simple overlay design of circular and rectangular patches with the partial ground plane exhibiting high gain and better directivity. The overlay patch antenna acts as the radiator for wider bandwidth compared to the fundamental design of patch antenna and is matched to an SMA connector via 50[Formula: see text][Formula: see text] microstrip feed line. These simulated results are presented using HFSS software package. The designed antennas are fabricated and validated by using Agilent Vector Analyzer.

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