scholarly journals X-band Band-pass Frequency Selective Surface for Radome Applications

2015 ◽  
Vol 16 (2) ◽  
pp. 281
Author(s):  
Tariq Rahim ◽  
Jiodong Xu
Keyword(s):  
Frequency Selective Surface ◽  
Unit Cell ◽  
Dielectric Substrates ◽  
Low Profile ◽  
X Band ◽  
Analysis And Synthesis ◽  
Unit Cells ◽  
Band Pass ◽  
Frequency Selective ◽  
Unit Cell Dimensions

A low profile multi layer miniaturized unit cell frequency selective surface (FSS) with second-order band-pass response is design. The metallic layers in the form of capacitive patches and inductive grids are separated by dielectric substrates. The non-resonant sub-wavelength unit cells with unit cell dimensions and periodicities on the order of 0.15λ. The overall thickness of approximately 0.03λ is designed which is useful at lower frequencies with long wavelengths. The FSS exhibit a stable frequency response to different angles of incidence and polarizations. The analysis and synthesis of the FSS is done using equivalent circuit method and simulated using CST microwave studio at X-band.

Polarization independent bandstop frequency selective surface for X-band application

Circuit World ◽  
2019 ◽  
Vol 46 (1) ◽  
pp. 25-31
Author(s):  
Kanchana D. ◽  
Radha Sankararajan ◽  
Sreeja B.S. ◽  
Manikandan E.
Keyword(s):  
Frequency Selective Surface ◽  
Transverse Magnetic ◽  
Unit Cell Dimension ◽  
Unit Cell ◽  
Content Type ◽  
Low Profile ◽  
X Band ◽  
Measurement Results ◽  
Frequency Selective ◽  
Polarization Independent

Purpose A novel low profile frequency selective surface (FSS) with a band-stop response at 10 GHz is demonstrated. The purpose of this designed FSS structure is to reject the X-band (8-12 GHz) for the application of shielding. The proposed FSS structure having the unit cell dimension of 8 × 8 mm2, the miniaturization of the FSS unit cell in terms of λ0 is 0.266 λ0 × 0.266 λ0, where λ0 is free space wavelength. The designed FSS provides 4 GHz bandwidth with insertion loss of 15 dB. The transverse electric (TE) and transverse magnetic (TM) modes of the proposed design are same because of polarization independent characteristics and hold the angularly stable frequency response for both TE and TM mode polarization. Both the simulation and measurement results are in good agreement to each other. Design/methodology/approach The proposed FSS design contains square-shaped PEC material, which is placed on the substrate and the shape of the circle and rectangle is etched over the PEC material. The PEC material of the patch dimension is 0.0175 mm. The substrate used for the proposed design is FR4 lossy with the thickness of 0.8 mm and permittivity εr = 4.3 having a loss tangent of 0.02. Findings To find a new design and miniaturized FSS structure is discussed. Originality/value 100%

scholarly journals Radiation Characteristic Improvement of X-Band Slot Antenna Using New Multiband Frequency-Selective Surface

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Elham Moharamzadeh
Keyword(s):  
Frequency Selective Surface ◽  
Radiation Characteristic ◽  
Ring Resonators ◽  
Slot Antenna ◽  
Radiation Characteristics ◽  
Split Ring ◽  
X Band ◽  
Unit Cells ◽  
Box Method ◽  
Frequency Selective

A new configuration of frequency-selective surfaces (FSSs) is designed and presented with multiresonance characteristics which covers all of the frequency domain of X-band from 8 to 12 GHz. The proposed FSS comprises three conductor-based split ring resonators, connected together. In this design, two unit cells of the FSS with different lengths are employed side by side to design the FSS. The FSS is used to enhance the gain of the new designed triangle slot antenna at X-band. The proposed FSS is analyzed by using reflected-wave unit-cell box method. The single, double, and array of the FSS cells are studied. Next, the designed FSS along with the antenna is analyzed. The measurement and simulated results of the impedance and radiation characteristics, especially the increment of the gain, are presented.

scholarly journals A Miniaturized Frequency Selective Surface Based on Square Loop Aperture Element

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Wenxing Li ◽  
Chunming Wang ◽  
Yong Zhang ◽  
Yingsong Li
Keyword(s):  
Theoretical Analysis ◽  
Cell Structure ◽  
Frequency Selective Surface ◽  
Unit Cell ◽  
Angle Stability ◽  
Band Pass ◽  
Simulation Results ◽  
Frequency Selective ◽  
Unit Cell Structure ◽  
Periodic Unit Cell

We propose a miniaturized band-pass frequency selective surface (FSS) with periodic unit cell structure. The proposed FSS is realized by symmetrically bending the edges of the square loop aperture element, by which our proposed FSS increases the resonant length, and, hence, reduces its size. In this FSS, each unit cell has a dimension of 0.0538λ × 0.0538λ, whereλrepresents the wavelength of the corresponding resonant frequency. Both the theoretical analysis and simulation results demonstrate that our proposed FSS, having high polarization stability and angle stability, can achieve smaller size in comparison with the previously proposed structures.

scholarly journals Elliptical BandPassThree Dimensional Frequency Selective Surface with Multiple Transmission Zeros

2018 ◽  
Vol 12 (3) ◽  
pp. 1020
Author(s):  
Bimal Raj Dutta ◽  
Binod Kumar Kanaujia ◽  
Chhaya Dalela
Keyword(s):  
Plane Wave ◽  
Incident Angle ◽  
Frequency Selective Surface ◽  
Unit Cell ◽  
Long Distance ◽  
Band Frequency ◽  
Microstrip Lines ◽  
Transmission Zeros ◽  
Band Pass ◽  
Frequency Selective

An elliptic band pass response three-dimensional Frequency Selective Surface (3D FSS) is designed from a single unit cell of 2D array of two shielded microstrip lines. The designed FSS provides pseudo-elliptic band-pass frequency response (5.4 – 9.6) GHz with its application in long-distance radio telecommunications and space communications etc. The four transmission zeros at 5.4GHz, 9.6GHz, 12.4GHz and 15GHz provides wide out-of-band frequency rejection. The 3D FSS is independent of the variations in the incident angle of the plane wave up to 60 degree. Each unit cell is a combination of two shielded microstrip lines with one having an air gap and the other one having in between rectangular metallic plate. When a TE polarized plane wave incidents perpendicular to the perfect electric conductor (PEC) boundary walls shielded microstrip lines, it results in two quasi-TEM modes namely air and substrate mode. The 3D FSS consists of multiple resonators with a multimode cavity having number of propagating modes. These resonating modes in phase provide transmission poles and when out of phase give transmission zeros. The 3D FSS structure is simulated using Ansys HFSS software with improved performance over 2DFSS, for many practical applications such as antenna sub-reflector, radomes and spatial filters.

scholarly journals Isolation Enhancement between Indoor Repeater Antennas with Chip Resistor Embedded FSS

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
Jae-Yeong Lee ◽  
Byeongkwan Kim ◽  
Myun-Joo Park ◽  
Byungje Lee
Keyword(s):  
Ground Plane ◽  
Frequency Selective Surface ◽  
Unit Cell ◽  
Cross Polarization ◽  
Quarter Wavelength ◽  
Unit Cells ◽  
Side Walls ◽  
Frequency Selective ◽  
The Cross

The isolation enhancement between the donor antenna and the service antenna for indoor repeater systems is presented by using a frequency-selective surface (FSS). A unit cell of the proposed FSS consists of a quarter-wavelength resonator, a chip resistor, an FR4 substrate, and a ground plane. Applying the unit cells of the proposed FSS embedded a chip resistor on the side walls of each reflector for indoor WCDMA repeater antennas and aligning them along with the cross-polarization of each antenna, the isolation is improved by about 13 dB at the WCDMA band.

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
Sign in / Sign up

Export Citation Format

Share Document