Design of a Full Solid Angle Scanning Cylindrical-and-Conical Phased Array Antennas

Xia, Yulong; Muneer, Badar; Zhu, Qi

doi:10.1109/tap.2017.2730241

Cited by 53 publications

(24 citation statements)

References 40 publications

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“…In addition, it is found that the proposed array provides -40 dB with the same number of elements and base radius of the other two designs. On the other hand, at the same number of elements and base radius, the proposed stacked array provides 12° lower beamwidth than in [20], but is higher than [6] by 4°. Therefore, we can conclude that the proposed stacked array has efficient scanning performance with almost constant beamwidth due to the proposed weighting function in Equation (35) which also reduces the sidelobe levels.…”

Section: Comparsion With Relevant Conformal Array Designsmentioning

confidence: 95%

“…As shown previously in Figure 14, the proposed conformal array in this paper provides its best performance at mainlobe directions near its broadside, which can be considered as the same as the cone base angle; however, the concept of orienting the array feeding amplitude so that the maximum amplitude weighting is assigned to the elements that are near to or located on the mainlobe vector minimizes the beamwidth variation and hence provides efficient beam scanning. To clearly demonstrate the contribution of the current work, we compare the performance of the proposed stacked array with the most relevant recent work presented in [6] and [20], where they almost aim at the same objectives and array structure. While there many other proposed airborne antenna systems, they do not provide common objectives that may be included in the comparison which mainly provides fixed power patterns in a broadside or endfire direction without beam steering capabilities or optimization.…”

Section: Comparsion With Relevant Conformal Array Designsmentioning

confidence: 99%

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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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Section: Comparsion With Relevant Conformal Array Designsmentioning

confidence: 95%

Section: Comparsion With Relevant Conformal Array Designsmentioning

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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“…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. In some advanced application where flexible materials are employed, the shape of an antenna array becomes a new parameter in the synthesis of a shaped beam [9].…”

Section: Introductionmentioning

confidence: 99%

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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“…• . On the other hand, to increase the beam steering range of phased array antennas, one method is to place the radiating elements on conformal surfaces, such as cylindrical [34] and spherical surfaces [35]. Implementing beam steering antennas on conformal surfaces are also desirable in order to meet the aerodynamic requirements in some communication platforms, such as aircrafts and satellites [35].…”

Section: Introductionmentioning

confidence: 99%

Wide-Angle Beam Steering Based on an Active Conformal Metasurface Lens

Shen

et al. 2019

IEEE Access

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This work experimentally demonstrates a wide-angle beam steering based on an active conformal metasurface lens. Integrated with microwave varactors, the transmission phase of this cylindrical metasurface lens can be tuned in a range up to 195• by direct-current (DC) bias voltages. By compensating the phase difference between different incidences, the proposed cylindrical lens can collimate the incident spherical wave front into a plane wave front with predefined deflection angle. By increasing the number of feeding sources, the beam steering range of conformal lens can be expanded to ± 60• . Having advantages of low cost and simple structure, the proposed conformal lens can be extended to millimeter-wave band and enable a wide range of applications.

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Design of a Full Solid Angle Scanning Cylindrical-and-Conical Phased Array Antennas

Cited by 53 publications

References 40 publications

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

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

Inverse Source on Conformal Conic Geometries

Wide-Angle Beam Steering Based on an Active Conformal Metasurface Lens

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