Design of a Novel 2.5D Frequency Selective Surface Element Using Fibonacci Spiral for Radome Application

2018 ◽  
Author(s):  
Krushna Kanth Varikuntla ◽  
Raghavan Singaravelu
Keyword(s):  
Frequency Selective Surface ◽  
Surface Element ◽  
Frequency Selective

A New Hybrid Frequency Selective Surface Design in the 2.4GHz and 5.8GHz ISM Bands

2016 ◽  
Vol 850 ◽  
pp. 9-15
Author(s):  
Bora Döken ◽  
Mesut Kartal
Keyword(s):  
Personal Communication ◽  
Resonance Wavelength ◽  
Frequency Selective Surface ◽  
Surface Element ◽  
Wireless Devices ◽  
Surface Design ◽  
Periodic Cell ◽  
Hybrid Frequency ◽  
Indoor Wireless ◽  
Frequency Selective

With the advancement in telecommunication in indoor environment, the use of wireless technology for information systems has drastically increased. The intensive use of indoor wireless devices in 2.4GHz and 5.8GHz ISM bands causes mutual interference in neighboring networks which degrades the system performance. Secure personal communication within such wireless networks is also another important problem. A band-stop frequency selective surface (operating in the WLAN frequency band) which is attached to the walls of buildings can provide a solution for these interference and security problems. In this work, a new band-stop hybrid frequency selective surface element consisting of two circular looped type geometries is introduced which is capable of attenuating the incoming 2.4GHz and 5.8GHz ISM signals minimum 13dB for all polarizations and incident angles varies from 00 to 450. Besides, a periodic cell size (p=26,5mmm) which is almost one fifth of the first resonance wavelength is obtained.

Design of a hybrid A-sandwich radome using a strongly coupled frequency selective surface element

2020 ◽  
Vol 12 (8) ◽  
pp. 738-748 ◽  
Author(s):  
Krushna Kanth Varikuntla ◽  
Raghavan Singaravelu
Keyword(s):  
Transmission Loss ◽  
Incidence Angle ◽  
Core Layer ◽  
Middle Layer ◽  
Frequency Selective Surface ◽  
Surface Element ◽  
Dielectric Parameters ◽  
Strongly Coupled ◽  
Dielectric Layers ◽  
Frequency Selective

AbstractThe airborne radomes have to cater superior electromagnetic (EM) performance with bandpass characteristics of stealth application. In this regard, a hybrid A-sandwich radome is proposed in this paper. The proposed radome consists of a novel strongly coupled frequency selective surface (FSS) core sandwiched between two dielectric layers (acts as skin) to form an A-sandwich structure. The dielectric layers are cascaded in such a way that the middle layer has less dielectric parameters than the skin dielectric. The core layer comprises a modified FSS array using strongly coupled FSS layers through a series of metallic vias. This strongly-coupled FSS element will have the advantage of eliminating inter-element interference and improves the EM performance characteristics of the structure. The structure exhibits very good band-pass characteristics (>90%) at a normal impinging angle with sharp roll-off characteristics. To show the efficacy of the proposed structure, the transmission loss has been compared with that of conventional A-sandwich radomes at 0°, 50° incidence angle for both TE and TM polarization. Conformal analysis of the unit cell has been carried out, and sector-wise thickness optimization was performed to analyze the structure for the conformal shaped radome application. Finally, a physical prototype has been fabricated and measured its scattering parameters, radiation characteristics in a fully shielded anechoic chamber. The results are encouraging and prove its suitability for radome application.

Study on a Novel Frequency Selective Surface Element

2014 ◽  
Vol 51 (10) ◽  
pp. 101602
Author(s):  
朱华新 Zhu Huaxin ◽  
郭颖 Guo Ying ◽  
李帅 Li Shuai ◽  
孙亚军 Sun Yajun
Keyword(s):  
Frequency Selective Surface ◽  
Surface Element ◽  
Frequency Selective

scholarly journals A Dual-Frequency Miniaturized Frequency Selective Surface Structure Suitable for Antenna Stealth

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Wei Zhang ◽  
Maojun Li ◽  
Mingnan Le ◽  
Bin Li ◽  
Jiaqi Wei
Keyword(s):  
Surface Structure ◽  
Frequency Selective Surface ◽  
Dual Band ◽  
Surface Element ◽  
Dual Frequency ◽  
Transmission Characteristics ◽  
Band Frequency ◽  
Unit Structure ◽  
Cell Architecture ◽  
Frequency Selective

A tiny dual-band frequency selective surface structure is proposed in this paper. With dual-band rejection characteristics at the corresponding frequency points of the S-band and C-band, suitable for antenna stealth. To achieve miniaturization, the unit-cell architecture resembles the shape of a “S.” First of all, the author describes the parameters of the surface element, and then, the transmission characteristics of the surface element are analyzed by the equivalent circuit method. By maintaining a constant response to TE and TM polarization patterns and oblique incident angles, the suggested device ensures angular independence. The measured findings from the constructed FSS are used to validate the computed results. Finally, a new unit structure is provided for the application of FSS in antenna stealth.

Dual-Band Band-Pass Frequency Selective Surface Based on the Matryoshka Geometry with Angular Stability and Polarization Independence

2020 ◽  
Author(s):  
Alfredo Gomes Neto ◽  
Jefferson Costa e Silva ◽  
Alexandre Jean Rene Serres ◽  
Marina de Oliveira Alencar ◽  
Ianes Barbosa Grecia Coutinho ◽  
...  
Keyword(s):  
Frequency Selective Surface ◽  
Angular Stability ◽  
Dual Band ◽  
Band Pass ◽  
Frequency Selective
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