scholarly journals Dual Layer Microstrip Refflectarray Composed of Two Stacked Arrays with Minkowski and Square Shaped Radiating Element

2012 ◽  
Vol 58 (1) ◽  
Author(s):  
M. F. Ismail ◽  
A. Wahid ◽  
M. K. A. Rahim ◽  
F. Zubir
Keyword(s):  
Single Layer ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Variable Dimension ◽  
Reflection Phase ◽  
Radiating Element ◽  
Reflector Surface ◽  
Phase Range ◽  
Reflectarray Antenna ◽  
Lower Insertion Loss

A dual layer microstrip reflectarray composed of two stacked arrays with Minkowski and square patches of variable dimension is presented. The reflection phase coefficients on the reflector surface is achieved by tuning the dimensions of the patches. This technique is to broaden the bandwidth and to extend the reflection phase range compare to a conventional single layer reflectarray. From the simulation results of a unit cell composed of two stacked arrays of Minkowski and square patch showed that, 415° reflection phase range is achieved and lower insertion loss which is lower than 0.9 dB. Base on the simulated reflection phase coefficient, a dual layer microstrip reflectarray antenna with Minkowski and square radiating shape elements have been design and model using commercially available computer models of CST Microwave Studio. The reflectarray has been constructed using Taconic RF-35 substrate. From the radiation pattern at 11 GHz frequency, it shows that the HPBW of 4.7º in both plane, a side lobe level (SLL) of –17 dB and a maximum directivity of 26.1 dBi.

Design and Analysis of Reflectarray Compound Unit Cell for 5G Communication

2021 ◽  
Vol 35 (12) ◽  
pp. 1513-1518
Author(s):  
Tahir Bashir ◽  
Han Xiong ◽  
Abdul Aziz ◽  
Muhammad Qureshi ◽  
Haroon Ahmed ◽  
...  
Keyword(s):  
Single Layer ◽  
Unit Element ◽  
Antenna Design ◽  
Center Frequency ◽  
Surface Current Density ◽  
Layer Compound ◽  
Single Beam ◽  
Reflection Phase ◽  
Phase Range ◽  
Reflectarray Antenna

In this paper, a single-layer compound unit element is proposed for reflectarray antenna design operating in Ka-band (26.5-29.5GHz) at the center frequency of 28GHz. A systematic study on the performance of a compound unit element is examined first. The structure of the proposed unit element is a unique combination of two different shape simple patches i.e. cross dipole and square patches. The desired phase range is achieved due to the multi-resonance of both patch elements with a single layer without any air-gap. The compound unit element is simulated by computer models of CST Microwave studio based on the Floquet approach (infinite periodic approach) and it has achieved 348.589o reflection phase range. Furthermore, the analysis of the reflection phase range, S-curve gradient, reflection magnitude, fabrication tolerance, and surface current density is also simulated and demonstrated. Based on the remarkable performance, the proposed element can be considered as the best element of single-beam or multi-beam reflectarray antenna design for 5G applications.

Longitudinal slotted waveguide array feed networks

2018 ◽  
Vol 10 (4) ◽  
pp. 512-517 ◽  
Author(s):  
J. Soleiman Meiguni ◽  
S. Keshavarz Haddad ◽  
A. Hosseinbeig
Keyword(s):  
Double Layer ◽  
Layer Structure ◽  
Single Layer ◽  
Side Lobe ◽  
Center Frequency ◽  
Side Lobe Level ◽  
Waveguide Array ◽  
Coupling Mechanism ◽  
Feed Network ◽  
Slotted Waveguide

AbstractIn this paper, two new feed network designs for single layer and double layer slotted waveguide array antennas are presented. A microstrip to substrate integrated waveguide transition is applied to the single layer antenna. The aperture coupling mechanism is used in order to find the optimum feed network for double-layer structure and to obtain stable radiation characteristics over the frequency band. The prototypes of the proposed antennas have been fabricated and tested. The measured results were compared very well with the simulation results obtained from CST microwave studio and showed low side lobe level at the center frequency of 11.5 GHz for the low-profile 4-channel slotted waveguide arrays.

scholarly journals A Novel Asymmetric Patch Reflectarray Antenna with Ground Ring Slots for 5G Communication Systems

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1450
Author(s):  
M. Hashim Dahri ◽  
M. Haizal Jamaluddin ◽  
Fauziahanim C. Seman ◽  
Muhammad Inam Abbasi ◽  
Adel Y. I. Ashyap ◽  
...  
Keyword(s):  
Communication Systems ◽  
Ground Plane ◽  
Single Layer ◽  
High Gain ◽  
Circular Ring ◽  
Vertical Side ◽  
Phase Range ◽  
Dual Resonance ◽  
Reflectarray Antenna ◽  
5G Communication

The narrow bandwidth and low gain performances of a reflectarray are generally improved at the cost of high design complexity, which is not a good sign for high-frequency operation. A dual resonance asymmetric patch reflectarray antenna with a single layer is proposed in this work for 5G communication at 26 GHz. The asymmetric patch is developed from a square patch by tilting its one vertical side by a carefully optimized inclination angle. A progressive phase range of 650° is acquired by embedding a circular ring slot in the ground plane of the proposed element for gain improvement. A 332-element, center feed reflectarray is designed and tested, where its high cross polarization is suppressed by mirroring the orientation of asymmetric patches on its surface. The asymmetric patch reflectarray offers a 3 dB gain bandwidth of 3 GHz, which is 4.6% wider than the square patch reflectarray. A maximum measured gain of 24.4 dB has been achieved with an additional feature of dual linear polarization. Simple design with wide bandwidth and high-gain of asymmetric patch reflectarray make it suitable to be used in 5G communications at high frequencies.

A wideband, single layer reflectarray antenna with cross loop and square ring slot loaded patch elements

2019 ◽  
Vol 11 (7) ◽  
pp. 703-710 ◽  
Author(s):  
Lingasamy Veluchamy ◽  
Gulam Nabi Alsath Mohammed ◽  
T. Selvan Krishnasamy ◽  
Rajeev Jyoti
Keyword(s):  
Ground Plane ◽  
Single Layer ◽  
Unit Cell ◽  
Operating Frequency ◽  
Geometrical Parameters ◽  
Frequency Range ◽  
Operating Frequency Range ◽  
Cell Element ◽  
Phase Range ◽  
Reflectarray Antenna

AbstractThis paper presents the design and analysis of a wideband X/Ku and Ku band reflectarray antenna. The proposed unit cell of the reflectarray antenna comprises a patch loaded with two distinct slots, viz. a square ring and a cross loop, printed on a low loss substrate, which is backed by a foam-loaded ground plane. The unit cell element offers a linear and large dynamic reflection phase range, which is achieved by optimizing the shape, location, and geometrical parameters of the two slots loaded on the patch. A 324 element microstrip reflectarray antenna of size 200 × 200 mm2 is constructed and analyzed for its radiation characteristics by simulation and measurement. The reflectarray offers a 3 dB gain bandwidth of 50.75% with the operating frequency range of 10–16.8 GHz. It offers a peak gain and aperture efficiency of 25.4 dB and 40% at 12.6 GHz, respectively. The cross-polarization level is below −40 dB over the entire operating frequency range.

Design of a Bifocal Single Reflectarray Antenna with Improving Beam Scanning Performance

2015 ◽  
Vol 9 (1) ◽  
pp. 200-207
Author(s):  
Yan Qu ◽  
Chenjiang Guo ◽  
Wencan Peng ◽  
Jun Ding ◽  
Yuteng Gao ◽  
...  
Keyword(s):  
Side Lobe ◽  
High Gain ◽  
Field Of View ◽  
Circular Path ◽  
Side Lobe Level ◽  
Beam Scanning ◽  
Reflectarray Antenna ◽  
Gain Loss ◽  
Phase Design ◽  
Ku Band

A novel scheme is introduced to design the high gain beam scanning reflectarray antennas for limited scan range application. At first, various existing schemes for beam scanning reflectarray antennas design are reviewed and it is concluded that as a convenient design scheme, the feed displacement technique is preferred for limited scan range applications. In order to improve the scan range, a bifocal single reflector aperture phase is introduced for reflectarray aperture phase design, and in order to further improve the performance, a circular path for feed displacement is introduced to take the place of the conventional lateral path. Based on the introduced scheme, a Ku band bifocal single reflectarray antenna is designed for limited scan range application. The scan performances of the designed reflectarray are analyzed numerically and compared with conventional parabolic design. Numerical results show that the bifocal design shows significant improved scan performance with less 0.8 dB gain loss and lower than -13 dB side lobe level over entire scan range -30° to +30°, which illustrates that the bifocal design for limited field of view beam scanning reflectarray is a promising attempt.

Non-uniform Feeding Network for a Dual Circularly Polarized 16×16 Ku-Band Antenna Array for On-Move Satellite Communication

2021 ◽  
Vol 36 (2) ◽  
pp. 115-125
Author(s):  
Walaa Hassan ◽  
Khalid Ibrahim ◽  
Esmat Abdallah ◽  
Ahmed Attiya
Keyword(s):  
Antenna Array ◽  
Satellite Communication ◽  
Single Layer ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Antenna Structure ◽  
Circularly Polarized ◽  
Satellite Systems ◽  
Analysis And Design ◽  
Ku Band

This paper presents analysis and design of a dual circularly polarized 16×16 Ku band antenna array with emphasis on its feeding network. The proposed antenna is designed for on-move satellite communication system where the radiation pattern and the side-lobe level should meet the ITU standards to avoid interference with other satellite systems. This requirement is obtained by using non-uniform feeding distribution network. In addition, dual circular polarization operation requires sequential feeding networks with appropriate phase shift sequences. The proposed antenna is divided into 16 sub-cells of 4×4 radiating elements. The elements inside the sub-cell are fed by uniform dual sequential feeding networks. These sub-cells are connected together via two non-uniform feeding networks on a single layer in the shape of two interlaced fork configurations. In addition, cascaded power dividers are used to achieve the required low power division ratios between some of the sub-cells according to the required feeding distribution. These modifications simplify the fabrication process of the proposed antenna structure and reduce the required layers while satisfying the required radiation parameters.

scholarly journals Resonant Elements for Tunable Reflectarray Antenna Design

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
M. Y. Ismail ◽  
M. Inam
Keyword(s):  
Single Layer ◽  
Scattering Parameter ◽  
Accurate Analysis ◽  
Band Frequency ◽  
Rectangular Patch ◽  
Phase Errors ◽  
X Band ◽  
Phase Range ◽  
Finite Integral ◽  
Reflectarray Antenna

This paper presents an accurate analysis of different configurations of reflectarray resonant elements that can be used for the design of passive and tunable reflectarrays. Reflection loss and bandwidth performances of these reflectarray elements have been analyzed in the X-band frequency range with the Finite Integral Method technique, and the results have been verified by the waveguide scattering parameter measurements. The results demonstrate a reduction in the phase errors offering an increased static linear phase range of 225° which allows to improve the bandwidth performance of single layer reflectarray antenna. Moreover a maximum dynamic phase range of 320° and a volume reduction of 22.15% have been demonstrated for a 10 GHz reflectarray element based on the use of rectangular patch with an embedded circular slot.

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