scholarly journals High-Efficiency Polarizer Reflectarray Antennas for Data Transmission Links from a CubeSat

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1802
Author(s):  
Eduardo Martinez-de-Rioja ◽  
Daniel Martinez-de-Rioja ◽  
Rafael López-Sáez ◽  
Ignacio Linares ◽  
Jose A. Encinar
Keyword(s):  
Circular Polarization ◽  
Data Transmission ◽  
High Efficiency ◽  
High Gain ◽  
Dual Band ◽  
Left Handed ◽  
Linearly Polarized ◽  
Flat Profile ◽  
First Time ◽  
Collimated Beam

This paper presents two designs of high-efficiency polarizer reflectarray antennas able to generate a collimated beam in dual-circular polarization using a linearly polarized feed, with application to high-gain antennas for data transmission links from a Cubesat. First, an 18 cm × 18 cm polarizer reflectarray operating in the 17.2–22.7 GHz band has been designed, fabricated, and tested. The measurements of the prototype show an aperture efficiency of 52.7% for right-handed circular polarization (RHCP) and 57.3% for left-handed circular polarization (LHCP), both values higher than those previously reported in related works. Then, a dual-band polarizer reflectarray is presented for the first time, which operates in dual-CP in the frequency bands of 20 GHz and 30 GHz. The proposed antenna technology enables a reduction of the complexity and cost of the feed chain to operate in dual-CP, as a linear-to-circular polarizer is no longer required. This property, combined with the lightweight, flat profile and low fabrication cost of printed reflectarrays, makes the proposed antennas good candidates for Cubesat applications.

A CPW-fed uniplanar dual-band tri-polarization diversity antenna based on PIN diode for the wireless communication

2017 ◽  
Vol 9 (8) ◽  
pp. 1695-1703
Author(s):  
Haixiong Li ◽  
Yunlong Gong ◽  
Jiakai Zhang ◽  
Jun Ding ◽  
Chenjiang Guo
Keyword(s):  
Wireless Communication ◽  
Circular Polarization ◽  
Coplanar Waveguide ◽  
Axial Ratio ◽  
Dual Band ◽  
Slot Antenna ◽  
Reconfigurable Antenna ◽  
Pin Diode ◽  
Left Handed ◽  
The Right

In this paper, a coplanar waveguide (CPW)-fed dual-band uniplanar tri-polarization reconfigurable antenna based on the PIN diode switch is proposed. The proposed antenna can be reconfigured between the linear polarization (LP) and the circular polarization (CP) mode, including both the right-handed circular polarization and left-handed circular polarization simultaneously within the dual operating bands. The central frequencies of the bands are 2.63 and 4.42 GHz, respectively, and the overlapped operating bandwidth is 17.8 and 3.40%. The proposed reconfigurable antenna is a closed-slot antenna fed by the CPW transmission line and the reconfigurable mechanism is to regulate the T-shaped driven stub through switching the PIN diodes on and off. The scattering parameters, axial ratio, radiation pattern, gain, and the radiation efficiency of the proposed antenna are all investigated in the following. The optimized antenna has been fabricated to experimental test, the simulated and the measured results agree well with each other. The lower frequency band of the proposed antenna covers the 2.40 GHz WLAN specification and the upper band can be used for the 5 G communication (4.40–4.50 GHz); therefore it is suitable to be applied in the mobile wireless communication.

scholarly journals Design of Compact Dual Band Circular Polarized Micro-strip Antenna for High Efficiency WLAN 802.11ax-2019

2018 ◽  
Vol 7 (3) ◽  
pp. 135
Author(s):  
Syed Muhammad Ali
Keyword(s):  
Circular Polarization ◽  
High Speed ◽  
Return Loss ◽  
High Efficiency ◽  
Axial Ratio ◽  
Dual Band ◽  
Power Capacity ◽  
Network Systems ◽  
Efficient Manner ◽  
Compact Design

Design of antennas for the latest upcoming standards of WLANs is considered as a key challenge in the science of Mobile Communication Engineering. Micro strip antennas are supposed to have some quality features in mobile and wireless network systems. Their weight and size are reduced and they are capable of having low power capacity. All these interesting features enabled these type of antennas suitable for the communication of IEEE 802.11ax-2019 high speed WLANs. Shape of these antennas can be designed in an efficient manner to achieve required gain and bandwidth. In this paper the concept of circular polarization has been introduced along with compact design of antennas in order to achieve return loss and axial ratio of less than -10 dB and 3dB respectively. Antenna has been designed and simulated on CST MW studio software and usage of dual bands 2.4 and 5.2GHz having circular polarization is properly elucidated for 802.11ax-2019.

scholarly journals Двухдиапазонная двухмодовая антенна с поляризационно-разнесенным приемом

2021 ◽  
Vol 64 (5) ◽  
pp. 308-324
Author(s):  
Р. Дхара ◽  
Т. Кунду
Keyword(s):  
Circular Polarization ◽  
Dual Band ◽  
Dual Mode ◽  
Linearly Polarized ◽  
Dual Polarized

В статье представлена компактная двухдиапазонная двухмодовая антенна двойной поляризации DBDMDP (dual-band dual-mode and dual-polarized) на основе асимметричной Y-образной микрополосковой линии питания вместе с кольцевым излучателем квадратного сечения. Нагрузкой конструкции являются две пары L-полосок для расширения полосы пропускания низшей моды (центральная частота fc = 9,36 ГГц). Этот сегмент использован для изменения распределения электромагнитного поля и получения дипольного ненаправленного линейно поляризованного LP (linearly polarized) излучения. Секция питания асимметричной Y-образной микрополосковой линией использована для формирования направленного излучения круговой поляризации CP (circular polarization) на более высокой моде (fc = 12,13 ГГц). Результаты измерений показали, что полоса частот по входному сопротивлению по уровню –10 дБ для режима диполя и режима патч-антенны составляет 730 МГц (7,72%, fc = 9,45 ГГц) и 1648 МГц (14,26%, fc = 11,56 ГГц), соответственно. При этом моделированное значение полосы пропускания по коэффициенту эллиптичности в режиме работы патч-антенны по уровню 3-дБ составляет 1280 МГц (10,74%, центральная частота полосы CP fCP = 11,92 ГГц). Максимальные значения коэффициентов передачи для двух мод на частотах fc = 9,36 и 12,13 ГГц составили 1,44 и 2,62 дБи, соответственно. Максимальное пиковое значение коэффициента передачи составило 3,32 дБи на частоте 12,27 ГГц. Данная патч-антенна с одним облучателем может быть использована в приложениях беспроводной связи благодаря своей компактной структуре, значительной ширине полосы, стабильной диаграмме направленности и поляризационно-разнесенному приему.

scholarly journals Dual-Band and High-Efficiency Circular Polarization Convertor Based on Anisotropic Metamaterial

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 7615-7621 ◽  
Author(s):  
Yongzhi Cheng ◽  
Junpeng Fan ◽  
Hui Luo ◽  
Fu Chen
Keyword(s):  
Circular Polarization ◽  
High Efficiency ◽  
Dual Band ◽  
Polarization Convertor ◽  
Anisotropic Metamaterial

A High-Gain Dual-Band EBG Resonator Antenna with Circular Polarization

2015 ◽  
Vol 14 ◽  
pp. 108-111 ◽  
Author(s):  
Basit Ali Zeb ◽  
Nasiha Nikolic ◽  
Karu P. Esselle
Keyword(s):  
Circular Polarization ◽  
High Gain ◽  
Dual Band

High gain dual-band distributed amplifier using new composite right/left-handed transmission line

2018 ◽  
Vol 10 (10) ◽  
pp. 1118-1127
Author(s):  
Hamed Shahraki ◽  
Ahmad Hakimi ◽  
Kambiz Afrooz ◽  
Mohammad Mahdi Pezhman
Keyword(s):  
Transmission Line ◽  
Wave Attenuation ◽  
High Gain ◽  
Dual Band ◽  
Power Gain ◽  
Frequency Bands ◽  
Distributed Amplifiers ◽  
Distributed Amplifier ◽  
Left Handed ◽  
Simulation Results

AbstractIn this paper, a high-gain dual-band distributed amplifier (DBDA) based on the metamaterial transmission line (TL) is proposed. To have two separate frequency bands in the distributed amplifiers, the composite right/left-handed (CRLH) TLs are used instead of conventional TLs. Although both forward and reverse gains of the distributed amplifiers are available in this case, they suffer from their low gains. In this paper, to increase the DBDA power gain, a new circuit architecture for the CRLH TL is introduced. By using the proposed CRLH TL, a lower wave attenuation coefficient at the forward band of the DBDA is achieved than the conventional structures, which causes a higher forward power gain. Simulation results also show that the power gain of the proposed DBDA is about 28.5 dB at the desired frequency bands, and good agreement between the measurement and simulation results confirms the accuracy of the design method.

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