Design and development of angularly stable and polarisation rotating FSS radome based on substrate‐integrated waveguide technology

Varikuntla, Kushna Kanth; Velu, Raghavan Singara

doi:10.1049/iet-map.2018.5386

Cited by 18 publications

(8 citation statements)

References 17 publications

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“…This study is performed using the parametric models on ANSYS, based on the ideas above. [ 19,20 ] The divided triangular elements in the 20‐face design are shown in Figure 10.…”

Section: Plate Divisions For a Truss Radome Surfacementioning

confidence: 99%

Design and structural analysis of a 70‐m metal space‐frame radome

Liu

2020

Structural Design Tall Build

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Summary The electrical performance of an antenna is usually affected by the stiffness, intensity, and stability of the radome structure. Thus, radome structural analysis is of great concern to designers. Taking a 70‐m radome structure to be built in the future with a 50‐m aperture antenna structure as the study platform, its mechanical behavior and electrical properties are analyzed and discussed. First, a detailed introduction regarding the method and principle of radome partitioning is presented. Based these methods, random divisions on radome plates are conducted using a specially developed program, and thereby, a whole spherical‐segment model is established. In addition, focusing on the finite element model of a steel radome structure, static mechanical, seismic response, modality, and stability analyses are performed, such that the member sections of the radome structure, adopting two kinds of materials, are determined. The results show that the mechanical properties of the structure are superior and that all indices meet the requirements in the safety evaluation. Just as noteworthy, the influencing mechanism of structural deformation of the radome on electrical performance is examined, and in particular, the reason why large deformation does not greatly degrade electrical performance is presented. Subsequently, a novel method for describing deformation is put forth to accurately estimate the effects of structural deformation on electrical performance. These achievements provide references for structural design and construction as well as maintenance of similar common metal space‐truss radomes.

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“…This study is performed using the parametric models on ANSYS, based on the ideas above. [ 19,20 ] The divided triangular elements in the 20‐face design are shown in Figure 10.…”

Section: Plate Divisions For a Truss Radome Surfacementioning

confidence: 99%

Design and structural analysis of a 70‐m metal space‐frame radome

Liu

2020

Structural Design Tall Build

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“…The helical antenna is composed of five wire windings and the FSS is placed in between two helical antennas. FSS and Substrate Integrated Waveguide (SIW) technology is used for airborne radome applications [13,14].…”

Section: Introductionmentioning

confidence: 99%

Compact Frequency Selective Surface (FSS) for X-Band Shielding

Khalil¹,

Riaz²,

Shahid³

et al. 2022

IJIST

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With the increase in the usage of electromagnetic devices, electromagnetic interference increased many folds. Frequency Selective Surface (FSS) provide effective shielding from unwanted frequency ranges. A thin, conformal band-stop FSS is presented in this research that provides effective electromagnetic shielding properties in X-band. The FSS acts as a band stop filter at 10 GHz. The proposed FSS has 54.7% fractional bandwidth. The design is of the dimensions 6.79 x 6.79 x 0.127 milimeter cube, employing Rogers RT 5880 substrate with 0.0009 dielectric constant. It has an attenuation of at least -57.97 dB. The proposed FSS shows oblique incidence angle independence for both TE and TM modes, up to 60o scan angle. The incidence angle independence makes the FSS response stable for both normal and varying angles of the incident waves. The design has a copper cladding of 0.018 mm, making the overall FSS thickness of 0.145 mm. The thin substrate makes the design flexible and easily bendable for curved surfaces. Its thin structure makes it easily applicable on buildings, vehicles and military aircrafts for electromagnetic shielding purposes. The conformability and shielding properties make the design suitable for various other applications.

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“…The EM characteristics of radome are strongly related to the aperture and location of the antenna with respect to radome wall as radome is in the near field of antenna much before main beam formation. With the mechanically scanned arrays, separation between the antenna and radome wall is always required to enable the scan movements of the antenna at different look angles [12][13][14][15][16][17][18] . However, with AESA, the antenna can even be kept at very near to the radome wall with minimum separation required for mechanical accessibility.…”

Section: Introductionmentioning

confidence: 99%

Investigations on Monolithic Radome Interactions with Active Electronically Scanned Array on Fighter Platform

2021

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The conventional fighter aircrafts are often equipped with fire control radar (FCR) using mechanically scanned antenna (MSA) with passive slots enclosed with monolithic conical radome. When the fighter platforms get upgraded with the modern active electronically steered array (AESA) FCR for better mission capabilities, even though radome change is desirable for optimum performance of AESA, it may not be feasible due to development time. This necessitate the evaluation of AESA radar with the existing monolithic radome. Hence active antenna aperture radiation pattern is required to be assessed with monolithic radome. To address this issue, simulation is preferred over physical testing, due to the reduced cost, time and complexity in measurements and ability to verify compatibility. In the present paper, the influence of monolithic radome on the active antenna radiation patterns are simulated and analysed. The characterisation studies helped for better optimisation of active aperture, optimum size for new radome development and additional space on fighter platforms that can be used for integration of new subsystems. Simulations are performed at two different locations of antenna inside radome. Experimental validations have been carried out to prove the efficacy of simulated results, which are in agreement.

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Design and development of angularly stable and polarisation rotating FSS radome based on substrate‐integrated waveguide technology

Cited by 18 publications

References 17 publications

Design and structural analysis of a 70‐m metal space‐frame radome

Design and structural analysis of a 70‐m metal space‐frame radome

Compact Frequency Selective Surface (FSS) for X-Band Shielding

Investigations on Monolithic Radome Interactions with Active Electronically Scanned Array on Fighter Platform

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