scholarly journals Multi Beam Dielectric Lens Antenna for 5G Base Station

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5849 ◽  
Author(s):  
Farizah Ansarudin ◽  
Tharek Abd Rahman ◽  
Yoshihide Yamada ◽  
Nurul Huda Abd Rahman ◽  
Kamilia Kamardin
Keyword(s):  
Radiation Pattern ◽  
Base Station ◽  
Base Stations ◽  
Beam Radiation ◽  
Lens Antenna ◽  
Millimetre Wave ◽  
Small Curvature ◽  
Lens Antennas ◽  
Base Station Antennas ◽  
Dielectric Lens

In the 5G mobile system, new features such as millimetre wave operation, small cell size and multi beam are requested at base stations. At millimetre wave, the base station antennas become very small in size, which is about 30 cm; thus, dielectric lens antennas that have excellent multi beam radiation pattern performance are suitable candidates. For base station application, the lens antennas with small thickness and small curvature are requested for light weight and ease of installation. In this paper, a new lens shaping method for thin and small lens curvature is proposed. In order to develop the thin lens antenna, comparisons of antenna structures with conventional aperture distribution lens and Abbe’s sine lens are made. Moreover, multi beam radiation pattern of three types of lenses are compared. As a result, the thin and small curvature of the proposed lens and an excellent multi beam radiation pattern are ensured.

scholarly journals Compact design of diplexer for base stations operating within frequency bands 2.3–2.4/2.49–2.69 GHz

2019 ◽  
Vol 30 ◽  
pp. 06002
Author(s):  
Konstantin Kobrin ◽  
Vyacheslav Rudakov ◽  
Mikhail Manuilov
Keyword(s):  
Reflection Coefficient ◽  
Insertion Loss ◽  
Wide Band ◽  
Base Station ◽  
Base Stations ◽  
Frequency Bands ◽  
Base Station Antennas ◽  
Band Pass ◽  
Compact Design ◽  
Narrow Bands

A new compact design of diplexer with high electrical performances is proposed for base station antennas operating within frequency bands 2.3–2.4/2.49–2.69 GHz. The diplexer consists of two interdigital band-pass filters and coaxial power divider. Proposed design has high potential from view poin of implementation of wide-band as well as medium and narrow bands filters. The fabricated diplexer shows the following measured characteristics: reflection coefficient is -18 dB within passbands, insertion loss is -0.28 dB, isolation of ports is -30 dB. Diplexer has the relatively simple easy to manufacture design and compact dimensions, so it may be directly integrated into the base station antennas.

scholarly journals Design of Sectoral Antennas Using a Metallic EBG Structure and Multiple Sources Feeding for Base Station Applications

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
M. Hajj ◽  
E. Rodes ◽  
D. Serhal ◽  
T. Monédière ◽  
B. Jecko
Keyword(s):  
Band Gap ◽  
Radiation Pattern ◽  
Base Station ◽  
Printed Antenna ◽  
Multiple Sources ◽  
Metallic Structures ◽  
Electromagnetic Band Gap ◽  
New Approach ◽  
Design Procedures ◽  
Base Station Antennas

This work aims to study and design base station antennas with metallic electromagnetic band gap (EBG) materials able to create a sectoral radiation pattern presenting at least a beamwidth. The use of metallic structures offers a new approach to industrial partners seeking to reduce costs and facilitate design procedures. A new method allowing the improvement of both the directivity and the bandwidth by using a printed antenna array is studied.

scholarly journals Radiation Pattern Performance of Unequally Linear Arrays with Parasitic Element

2017 ◽  
Vol 6 (1) ◽  
pp. 110
Author(s):  
Noor Ainniesafina Zainal ◽  
Muhammad Ramlee Kamarudin ◽  
Yoshihide Yamada ◽  
Norhudah Seman
Keyword(s):  
Radiation Pattern ◽  
Base Station ◽  
Sidelobe Level ◽  
Linear Arrays ◽  
Parasitic Element ◽  
Array Configuration ◽  
Grating Lobe ◽  
Base Station Antennas ◽  
Low Sidelobe ◽  
Mobile Base

<p>For next generation of 5G mobile base station antennas, multibeam, multifrequency and low sidelobe characteristics requested. Simplify the feeding network will contribute a low feeder loss and frequency dependent. From the previous research by the author, low sidelobe level reported by density tapered array configuration from -13 dB to -16 dB and the result maintained for wideband operation frequency at 28 GHz, 42 GHz, and 56 GHz. However, the grating lobe has occurred due to element spacing larger than a wavelength of higher frequency (56 GHz). In this paper, an investigation was made of the performance of radiation pattern for unequally microstrip linear array antenna in frequency 42 GHz and 56 GHz by loading parasitic elements. The effect of parasitic element to the impedance, gain, and sidelobe level of unequally microstrip linear spaced tapered array also examined. The design has been simulated using Ansoft High Frequency Structural Simulator (HFSS) ver 16.0.</p>

scholarly journals Evaluation of Interference in Ultra-Dense 5G Radio Access Networks with Beamforming

Telecom IT ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 35-59
Author(s):  
G. Fokin
Keyword(s):  
Radiation Pattern ◽  
Antenna Arrays ◽  
Access Network ◽  
Beam Width ◽  
Base Station ◽  
Access Networks ◽  
Base Stations ◽  
Radio Access Network ◽  
Radio Access Networks ◽  
Radio Access

In this paper, we investigate the dependence of the level of intersystem interference on the beam width of the adaptively formed antenna radiation pattern and the territorial separation of neighboring devices in ultra-dense 5G radio access networks. The results of simulation modeling of a radio access network based on 19 base stations with the parameterization of the antenna array gain by the width of the radiation pattern in the horizontal plane show that when the base station beam is di-rected to the user device and narrowed from 360° to 5°, the level of intrasystem interference decreases by 15 dB compared with the case of omnidirectional antennas. The results of simulation of a radio access network based on 19 three-sector base stations with planar antenna arrays of 64 elements illustrate a significant reduction in the level of interference in comparison with the case of omnidirectional antennas and, in order to obtain zones of a positive signal-to-noise ratio, confirm the need for a territorial separation of neighboring devices by 10–20 % of the range of radio coverage.

Inhomogeneous lens antenna design with fan-beam radiation pattern

2016 ◽  
Vol 14 (12) ◽  
pp. 121601-121605 ◽  
Author(s):  
Mohammad Mahdi Taskhiri Mohammad Mahdi Taskhiri ◽  
Mohammad Khalaj-Amirhosseini Mohammad Khalaj-Amirhosseini
Keyword(s):  
Radiation Pattern ◽  
Antenna Design ◽  
Beam Radiation ◽  
Lens Antenna

scholarly journals ANALYSIS ON TRENDING ELECTROMAGNETIC EXPOSURE LEVELS AT HOMES AND PROXIMITY NEXT TO BASE STATIONS ALONG THREE YEARS IN A CITY

2015 ◽  
Vol 23 (1) ◽  
pp. 71-81 ◽  
Author(s):  
Osman ÇEREZCİ ◽  
Baha KANBEROĞLU ◽  
Şuayb Çağrı YENER
Keyword(s):  
Electromagnetic Field ◽  
Base Station ◽  
Base Stations ◽  
Homogeneous Distribution ◽  
Field Exposure ◽  
Limit Values ◽  
Base Station Antennas ◽  
Outdoor Environments ◽  
Exposure Levels ◽  
The City

Electromagnetic field exposure levels of people living in the closest houses to the GSM transmitting antennas were investigated in a city between 2010 and 2012. At the end of 3-year period, trend of the electromagnetic exposure levels was determined especially for indoor/outdoor environments near the base station antennas. Because of increasing number of base stations by years and changing of the technology, it is determined that average electromagnetic exposure values in the city increased in a certain extent each year. Total and frequency selective measurements were performed in indoor/outdoor places. The results were compared by International ICNIRP limits. In addition, possibility of the compliance with some European countries which have applied low limit values are discussed to minimize involuntary exposure to electromagnetic fields at indoor/outdoor environments. Consequently, a suggestion is made and discussed for obtaining relatively homogeneous distribution of electromagnetic field exposure at indoor/outdoor environments near base station antennas to eliminate extent values.

scholarly journals Parametric Analysis of Negative and Positive Refractive Index Lens Antenna by ANSYS HFSS

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Phan Van Hung ◽  
Nguyen Quoc Dinh ◽  
Yoshihide Yamada ◽  
Naobumi Michishita ◽  
Mohammad Tariqul Islam
Keyword(s):  
Refractive Index ◽  
Parametric Analysis ◽  
Negative Refractive Index ◽  
Theoretical Calculations ◽  
Base Station ◽  
Simulation Software ◽  
Sidelobe Level ◽  
Lens Antenna ◽  
Lens Antennas ◽  
Simulation Results

Lens antennas with multibeam, high gain, and low sidelobe level are potential candidates for base station antennas in 5G mobile communication. In this paper, the authors perform simulation and parametric analysis of a lens antenna with positive and negative refractive indexes (NRI) using the modern electromagnetic field simulation software ANSYS HFSS. The simulation results of structures and theoretical calculations are analyzed and compared. The simulation results show the effectiveness of using negative refractive index lens antennas to minimize the dimension. The lens thickness with a negative refractive index decreased from 24.5 mm to 6.1 mm compared to the positive refractive index lens’s thickness. The results also indicate the similarities in gain, sidelobe level, amplitude, and electric field distribution on the aperture plane of the negative and positive refractive indexes (PRI) lens antennas compared to the theoretical calculation. In addition, the authors simulate a lens structure with additional quarter wavelength matching layers (MLs) to estimate the antireflection performance.

scholarly journals Reconfigurable Magneto-Electric Dipole Antennas for Base Stations in Modern Wireless Communication Systems

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Lei Ge ◽  
Xujun Yang ◽  
Zheng Dong ◽  
Dengguo Zhang ◽  
Xierong Zeng
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Frequency Standard ◽  
Base Station ◽  
Base Stations ◽  
Wireless Communication Systems ◽  
Dipole Antennas ◽  
Base Station Antennas ◽  
Electric Dipole Antennas ◽  
Antenna Characteristics

Magneto-electric (ME) dipole antennas, with the function of changing the antenna characteristics, such as frequency, polarization, or radiation patterns, are reviewed in this paper. The reconfigurability is achieved by electrically altering the states of diodes or varactors to change the surface currents distributions or reflector size of the antenna. The purpose of the designs is to obtain agile antenna characteristics together with good directive radiation performances, such as low cross-polarization level, high front-to-back ratio, and stable gain. By reconfiguring the antenna capability to support more than one wireless frequency standard, switchable polarizations, or cover tunable areas, the reconfigurable ME dipole antennas are able to switch functionality as the mission changes. Therefore, it can help increase the communication efficiency and reduce the construction cost. This shows very attractive features in base station antennas of modern wireless communication applications.

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