Compact 2 × 2 Circularly Polarized Aperture-Coupled Antenna Array for Ka-Band Satcom-on-the-Move Applications

Baghdadi, Hisham; Royo, Guillermo; Bel, Ismael; Cortés, Felipe; Celma, S.

doi:10.3390/electronics10141621

Cited by 7 publications

(5 citation statements)

References 29 publications

(31 reference statements)

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“…Satcom-on-the-move (SOTM) plays an important role in satellite communications, which focuses on realizing real-time satellite communications during the motion of the carrier [1][2][3][4]. Through the SOTM system, carriers such as vehicles, ships and aircrafts can realize the continuous transmission of multimedia information such as data, voice, images and videos through satellites as relays during the movement, which can play an important role in many civil and military fields.…”

Section: Introductionmentioning

confidence: 99%

Rapid Tracking Satellite Servo Control for Three-Axis Satcom-on-the-Move Antenna

Ren,

Ji,

Han

et al. 2024

Aerospace

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To overcome the possible gimbal lock problem of the dual-axis satcom-on-the-move (SOTM) antenna, a three-axis tracking satellite SOTM antenna structure appears. The three-axis SOTM antenna is realized by adding a roll axis to the azimuth axis and pitch axis in the dual-axis SOTM structure. There is coupling among the azimuth axis, pitch axis and roll axis in the mechanical structure of the three-axis SOTM antenna, which makes the kinematic modeling of the antenna difficult. This paper introduces a three-axis SOTM antenna kinematic modeling method based on the modified Denavit–Hartenberg (MDH) method, named the new modified Denavit–Hartenberg (NMDH) method. In order to meet the modeling requirements of the MDH method, the NMDH method adds virtual coordinate systems and auxiliary coordinate systems to the three-axis SOTM antenna and obtains the kinematic model of the three-axis SOTM antenna. During the motion of the carrier, the SOTM antenna needs to adjust the antenna pointing in real time according to the changes of the location and attitude of the moving carrier. Therefore, this paper designs a servo control system based on the active disturbance rejection controller (ADRC), introducing a smooth and continuous ADRC fal function to enhance the tracking speed of the servo control system and reduce the overshoot of the output response. Finally, system experiments were carried out with a 60 cm caliber three-axis SOTM antenna. The experiment results show that the proposed servo control method achieves higher antenna tracking satellite accuracy and better communication effects.

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Section: Introductionmentioning

confidence: 99%

Rapid Tracking Satellite Servo Control for Three-Axis Satcom-on-the-Move Antenna

Ren,

Ji,

Han

et al. 2024

Aerospace

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show abstract

“…Although sufficient spectrum resources can be obtained in the MMW band, the terminal equipment for MMW communication also suffers from high path loss [4]. In addition, it also needs to achieve coverage over a wide scanning range in order to provide uninterruptible communication when integrated on the move [5][6][7][8]. As a result, a phased array with wide-angle scanning capability is preferred due to its high gain and agile beamswitching [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Ka-Band Wide-Angle Scanning Phased Array with Dual Circular Polarization

Zhang,

Yin

2024

Electronics

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A wide-angle scanning phased array with dual circular polarization in the Ka-band is presented in this paper. To improve the scanning capability of the phased array, the microstrip element is modified by loading many metal posts at its center and periphery. In addition, a stripline coupler is designed to achieve dual circularly polarized (CP) radiation, and the inner conductor of the subminiature micro-push-on (SSMP) connectors for feeding the coupler is extended to the top layer of the multilayer element by introducing an open stub, which simplifies the assembly process between the SSMP connector and multilayer printed circuit board (PCB) due to through-hole soldering instead of blind-hole soldering. The proposed element can cover a frequency range from 28 GHz to 30.5 GHz with a relative bandwidth of 8.5% in the Ka-band. An 8 × 8 phased array is constructed based on this proposed element, and a wide-angle scanning range from −65° to +65° is obtained for the dual circular polarization. The proposed array has a gain fluctuation of 5.1 dB and an axial ratio (AR) of less than 3.3 dB during beam-steering. The prototype is fabricated and measured, with a good agreement between the measured and simulated results. The proposed phased array can be applied in a Ka-band millimeter-wave (MMW) communication system.

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“…Due to this application of CP antenna, the CP antenna are highly used in satellite communication, RFID, and future 5G base station and mobile communications [ 6 ]. In literature, numerous CP antenna were designed for lower bands (GPS, ISM, WLAM, and 5Gsub-6GHz) [ 7 , 8 , 9 , 10 ] and higher bands (mm-wave spectrum) [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. The CP antennas are also made capable of operating at left-hand side, called Left Hand Circularly Polarization (LHCP), and right-hand side, called Right Hand Circularly Polarization (RHCP).…”

Section: Introductionmentioning

confidence: 99%

“…The antenna mechanism is complex due to the loading of meta surface. Aperture couple antenna array for satellite communication is reported in [ 16 ]. The antenna offers a wide axial ratio and high peak gain but has large size and complex geometry.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Circular Polarized Two-Port MIMO Antennas with Various Antenna Element Orientations

et al. 2023

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This article presents the circularly polarized antenna operating over 28 GHz mm-wave applications. The suggested antenna has compact size, simple geometry, wideband, high gain, and offers circular polarization. Afterward, two-port MIMO antenna are designed to get Left Hand Circular Polarization (LHCP) and Right-Hand Circular Polarization (RHCP). Four different cases are adopted to construct two-port MIMO antenna of suggested antenna. In case 1, both of the elements are placed parallel to each other; in the second case, the element is parallel but the radiating patch of second antenna element are rotated by 180°. In the third case, the second antenna element is placed orthogonally to the first antenna element. In the final case, the antenna is parallel but placed in the opposite end of substrate material. The S-parameters, axial ratio bandwidth (ARBW) gain, and radiation efficiency are studied and compared in all these cases. The two MIMO systems of all cases are designed by using Roger RT/Duroid 6002 with thickness of 0.79 mm. The overall size of two-port MIMO antennas is 20.5 mm × 12 mm × 0.79 mm. The MIMO configuration of the suggested CP antenna offers wideband, low mutual coupling, wide ARBW, high gain, and high radiation efficiency. The hardware prototype of all cases is fabricated to verify the predicated results. Moreover, the comparison of suggested two-port MIMO antenna is also performed with already published work, which show the quality of suggested work in terms of various performance parameters over them.

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Compact 2 × 2 Circularly Polarized Aperture-Coupled Antenna Array for Ka-Band Satcom-on-the-Move Applications

Cited by 7 publications

References 29 publications

Rapid Tracking Satellite Servo Control for Three-Axis Satcom-on-the-Move Antenna

Rapid Tracking Satellite Servo Control for Three-Axis Satcom-on-the-Move Antenna

Ka-Band Wide-Angle Scanning Phased Array with Dual Circular Polarization

Design and Analysis of Circular Polarized Two-Port MIMO Antennas with Various Antenna Element Orientations

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