Versatile Conical Conformal Array Antenna Based on Implementation of Independent and Endfire Radiation for UAV Applications

Xu, Hongcheng; Cui, Jianli; Duan, Junping; Zhang, Binzhen; Tian, Ying

doi:10.1109/access.2019.2903198

Cited by 21 publications

(15 citation statements)

References 25 publications

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“…These conclusions are further supported by the quantitative sample results reported in Tables I-III For the elliptic arc, the smallest including circle has a radius = 1+ (14) to be used in (3). It can be observed that is always larger than…”

Section: Exact Ndfsupporting

confidence: 71%

“…HE development of conformal antennas array [1] and the increasing interest in their applications is due to several reasons. First, aero dynamic advantages arise for aircraft (such as UAV [2,3] and SAR [4] platforms) and vessels, but they could also be exploited for the realization of train antennas, car radio antennas, and cellular base station antennas, also for the demanding 5G networks [5,6]. Wide-angle and full solid angle scanning capability are often pursued for a variety of applications, such as both ground based [7] and on board [8] surveillance radar.…”

Section: Introductionmentioning

confidence: 99%

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Inverse Source on Conformal Conic Geometries

Leone

Munno

Pierri

2021

IEEE Trans. Antennas Propagat.

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The inverse source problem has a number of applications in antenna analysis and synthesis. The properties of the radiation operator, connecting the source current to the far zone field, depends on the source geometry and can be analyzed by its singular value decomposition. Here, first, we present useful upper bounds about the number of degrees of freedom for some 2D source geometries (i.e. for elliptical and parabolic arc sources) and examine the role of two different representation variables. These results were obtained from asymptotic arguments and allow to define the maximum number of independent sources and patterns that can be radiated by each geometry. They are verified to fit the numerically computed ones, too. Next, we examine the point source reconstructions by considering the point spread function. An approximate closed form evaluation reveals that the arc length representation variable leads to a space invariant behavior. The role of the source electrical length in determining the number of degrees of freedom is pointed out, too. Finally, the radiation properties of different source geometries are compared by means of a synthetic index and examples of radiation pattern synthesis and array diagnostics confirm the need to investigate the role of the source geometry.

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Section: Exact Ndfsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Inverse Source on Conformal Conic Geometries

Leone

Munno

Pierri

2021

IEEE Trans. Antennas Propagat.

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“…In addition, the very long distance spanned by space vehicles, such as those travelling to Mars, requires high gain and efficient adaptive conformal antennas to ensure high quality of the communication link. Several conformal antenna array structures have been proposed in the literature [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ], where most of them are fabricated in the form of microstrip patch antennas printed on a conical surface [ 8 , 9 , 10 , 11 , 12 , 13 , 14 ] or slotted cylindrical and conical structures [ 15 , 16 ]. For example, in [ 17 ], a conical array was designed for radar applications using genetic algorithm to reduce sidelobe levels.…”

Section: Introductionmentioning

confidence: 99%

“…In [ 18 ], a switched beam conformal conical array was proposed, using 12 elements at 5.2 GHz. For UAV communications, the work done in [ 19 ] proposed conical conformal array at 9.8 GHz for point-to-point communications, while in [ 20 ], the cylindrical antenna arrays are combined with conical arrays to form “CYLCON” array using microstrip Yagi antennas to provide wide solid angle scanning. On the other hand, the recent work done in [ 30 ] discussed the radiation properties of different source geometries based on the inverse source problem.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Conformal Stacked Antenna Array Design and 3D-Beamforming for UAV and Space Vehicle Communications

Albagory

2021

Sensors

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In this paper, a new conformal array structure and beamforming technique are proposed to provide efficient communication performance for unmanned aerial vehicles (UAVs) and space vehicles. The proposed array is formed by conformally stacking cylindrical, conical, and concentric circular (CSC4) arrays which are all coaxially aligned with the same axis of the conformed body and with uniform interelement spacing. The array elements are then fed by a weighting vector that has an adaptive cosine tapered profile where the maximum amplitude coefficient is oriented with the mainlobe direction to improve the scanning capabilities of the array and increase the array effective area. In addition, for very large, conformed body structures such as space vehicles, a frontal mainlobe-oriented partial CSC4 array beamforming technique is proposed to efficiently utilize the large CSC4 structure, reduce the processing requirements for mainlobe electronic steering, and to provide very low sidelobe levels with reduced backlobe levels. Simulation results show that the proposed CSC4 design can provide wide scanning angles of up to ±70° angular range in the θ-direction with only ±1° change in the beamwidth, without increasing array size and with achievable sidelobe level of –45 dB and backlobe levels less than –10 dB.

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“…However, beam switching technology is an alternative approach with a wide scanning angle, which further reduces the volume of the antenna system. To date, circuit-based beamforming network [18]- [23], planar lens [24]- [25], and radio frequency micro-electromechanical system (RF-MEMS) technology switch [26]- [29] for beam switching [30]- [31] are considered effective implementation methods with similar radiation performances. However, the complexity and scale of these networks will multiply as the port required increases to complete the scanning function, an outcome which makes it challenging to use on MBSs.…”

Section: Introductionmentioning

confidence: 99%

Omnidirectional Solid Angle Beam-Switching Flexible Array Antenna in Millimeter Wave for 5G Micro Base Station Applications

Jia

Xiong

et al. 2019

IEEE Access

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This study proposes a cylindrical conformal array antenna (CCAA) for fifth-generation (5G) micro base station applications. The CCAA is composed of five Chebyshev flexible linear array antennas (LAAs) with a circumferentially uniform arrangement on the cylindrical surface. The LAA with a logarithmic periodic arrangement is constructed by synthesizing the current amplitude distribution coefficients in elements with the Chebyshev method. The LAA with a half-power bandwidth (HPBW) wider than 76 • (−38.41 • to 38.58 • ) and a peak gain greater than 10 dBi is fabricated via the micro-electromechanical system process. Cost-performance analysis shows that five is the best number of linear arrays. To achieve omnidirectional switching scanning of the circumferential section, five LAAs wrapped on the cylindrical surface are individually excited by connecting a radio frequency semiconductor switch to the exciting ports of an eight-way power divider. Moreover, beam-switch scanning of the CCAA is measured with the aid of a standard anechoic chamber. The irradiated performance with low mutual coupling and high realized gain is verified to be irrelevant to the structural variation of various flexible experiments of LAAs wrapped around a cylindrical surface. The CCAA with beam-switch scanning operates at 26 GHz and belongs to the 5G millimeter-wave band. Results show the proposed antenna achieves omnidirectional scanning property in the H plane and has a HPBW of only 9.08 • in the E plane. The performances of the CCAA present potential advantage in flexible terminal equipment wireless communication.INDEX TERMS Beam switching, flexibility, Chebyshev linear array antenna, cylindrical conformal array antenna, millimeter wave, 5G.

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Versatile Conical Conformal Array Antenna Based on Implementation of Independent and Endfire Radiation for UAV Applications

Cited by 21 publications

References 25 publications

Inverse Source on Conformal Conic Geometries

Inverse Source on Conformal Conic Geometries

An Efficient Conformal Stacked Antenna Array Design and 3D-Beamforming for UAV and Space Vehicle Communications

Omnidirectional Solid Angle Beam-Switching Flexible Array Antenna in Millimeter Wave for 5G Micro Base Station Applications

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