Analysis of Transmission Loss and Boresight Error of a Curved FSS Radome-Enclosed Antenna

Shin, Hokeun; Yoon, Daeyeong; Na, Dong-Yeop; Park, Yong Bae

doi:10.1109/access.2021.3094526

Cited by 9 publications

(6 citation statements)

References 26 publications

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“…The SBR method is based on the ray tracing technique and physical optics (PO), which can quantify the multiple reflections by determining the equivalent current densities induced on the surface of illuminated PEC planes, whereas PTD can calculate the diffraction fields based on the determination of the filamentary currents induced on illuminated of PEC edges. In addition, the ray tracing technique and flat model are useful for identifying the EM characteristics of a multi-layer radome [27], [30]. In the high-frequency regime, the curved radome can be looked locally flat via the tangent plane approximation where the phase matching condition fulfills locally.…”

Section: B Numerical Methods For Rcs Estimatementioning

confidence: 99%

“…The antenna enclosed by the FSS radome is in the surface of the front of the fuselage. Here, we consider the same tangent-ogive FSS radome used in [27], which has a passband characteristic in the X-band. The base diameter and height of the FSS radome are 800 mm and 1060 mm, respectively.…”

Section: Analysis Procedures a Modeling Of The Aircraft Equipped With...mentioning

confidence: 99%

“…The FSS radome consist of seven layers: the innermost and outermost layers are E-glass/epoxy (skin), second and sixth layers are foam, third and fourth layers are adhesive films, and a FSS layer (hash-shaped slot unit cells) is sandwiched by the adhesive films. A detailed configuration and dimension of the FSS radome can be found in [27].…”

Section: Analysis Procedures a Modeling Of The Aircraft Equipped With...mentioning

confidence: 99%

“…In this paper, the RCS of an aircraft equipped with a tangential FSS radome, which is a curved hash-shaped slot FSS unit cell built into a multi-layered radome, was analyzed. Using a hybrid approach using both full-wave and high-frequency methods, we utilize the flat model and SBR method [27], [30] to describe the scattered EM fields inside the aircraft based on ray physics. Furthermore, we consider diffraction fields generated at edges of the aircraft via physical theory of diffraction (PTD) [1] to improve the accuracy of the present method.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Radome Cross Section of an Aircraft Equipped With a FSS Radome

Shin

Yoon

et al. 2022

IEEE Access

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We study the radar cross section (RCS) property of an aircraft considering the electromagnetic (EM) characteristics of a frequency selective surface (FSS) radome, mounted on the aircraft. Instead of full-wave methods, we utilize high-frequency methods, such as the shooting and bouncing rays (SBR), physical theory of diffraction (PTD), and flat model, taking a significant computational efficiency. Based on the developed algorithm, we analyze monostatic and bistatic RCSs of the aircraft equipped with either singleand multi-layer dielectric, FSS, or PEC radomes in terms of frequency and polarization. Our calculations are validated by comparing with those of the commercial EM simulator with significant computational efficiency. The present numerical study indicates that including the radome EM characteristics into the overall aircraft RCS study is crucial for the accurate RCS estimate INDEX TERMS Frequency selective surface (FSS), FSS radome, radar cross section (RCS), shooting and bouncing rays (SBR), physical theory of diffraction (PTD), flat model.

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Section: B Numerical Methods For Rcs Estimatementioning

confidence: 99%

Section: Analysis Procedures a Modeling Of The Aircraft Equipped With...mentioning

confidence: 99%

Section: Analysis Procedures a Modeling Of The Aircraft Equipped With...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Radome Cross Section of an Aircraft Equipped With a FSS Radome

Shin

Yoon

et al. 2022

IEEE Access

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“…Airborne radomes are dielectric shells that enclose antenna systems for protection. However, the existence of airborne radomes worsens the radiation characteristics of antennas, causing transmission loss (TL) and boresight error (BSE) [1]- [3]. Such deteriorations in radiation characteristics restrict the application of high-performance antennas in aircraft applications.…”

Section: Introductionmentioning

confidence: 99%

A Cylindrical Equivalent Source-Based Physical Optics Method for Rapid Analysis of Airborne Radomes

et al. 2022

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The physical optics (PO) method treats the outer surface of airborne radomes in front of antennas as a secondary source region when analyzing the electromagnetic performance. The effective reduction of the secondary source region can significantly improve the computational efficiency, which is helpful for the rapid analysis and design of airborne radomes. In this paper, we present a cylindrical equivalent source-based PO method by introducing an antenna radiation cylinder that can cover the main near-field radiation characteristics of the antenna. The cubic-spline interpolation technique is used to standardize the solution method for the boundary of the cylindrical equivalent source of different antennaradome systems. The results of a tangent-ogival radome verify the validity of the proposed method. Compared with the conical equivalent source-based PO method, the proposed method improves the efficiency by 71.83%. It can be applied to airborne antenna-radome systems with antenna diameters of 12.14 times of wavelength and above, using 10% as the error threshold.

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Efficient Radiation Pattern Estimation of Slot Array Antennas Covered With Frequency Selective Surfaces Using Deterministic Ray Tracing

et al. 2023

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In this paper, we propose a novel algorithm to compute the radiation pattern of a slot array antenna covered with frequency selective surfaces (FSS) based on ray tracing technique. We observed that the proposed algorithm could greatly reduce computational resources while yielding accurate numerical solution, compared with cases taking standard full-wave and conventional high-frequency approaches (summarized in Table I). The underlying principle is to combine the image method and physical optics technique. More specifically, the proposed algorithm (i) employs a boundary box that encloses the slot array antenna with FSS to correct phase errors and then (ii) calculates equivalent surface currents flowing on the boundary box. The surface of the boundary box is discretized by regular grids (or boundary meshes) and a ray path reaching each square cell in the boundary meshes is determined based on the image method. After collecting all the rays hitting the boundary meshes, equivalent surface current densities can be computed for the resulting radiation pattern. The proposed algorithm is suited best for dealing with electrically large structures much more efficiently and can advance the existing design process.INDEX TERMS Ray tracing, Image method, Radome, Array antenna, Frequency selective surface (FSS).

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Analysis of Transmission Loss and Boresight Error of a Curved FSS Radome-Enclosed Antenna

Cited by 9 publications

References 26 publications

Analysis of Radome Cross Section of an Aircraft Equipped With a FSS Radome

Analysis of Radome Cross Section of an Aircraft Equipped With a FSS Radome

A Cylindrical Equivalent Source-Based Physical Optics Method for Rapid Analysis of Airborne Radomes

Efficient Radiation Pattern Estimation of Slot Array Antennas Covered With Frequency Selective Surfaces Using Deterministic Ray Tracing

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