Angle and polarization‐independent bandstop frequency selective surface for indoor wireless systems

2008 ◽  
Vol 50 (9) ◽  
pp. 2315-2317 ◽  
Author(s):  
Ghaffer I. Kiani ◽  
Karu P. Esselle ◽  
Kenneth L. Ford ◽  
Andrew R. Weily ◽  
C. Panagamuwa
Keyword(s):  
Wireless Systems ◽  
Frequency Selective Surface ◽  
Indoor Wireless ◽  
Frequency Selective ◽  
Polarization Independent

Angle and polarization-independent miniaturized UWB FSS design

2021 ◽  
pp. 1-9
Author(s):  
Yanning Yuan ◽  
Yuchen Zhao ◽  
Xiaoli Xi
Keyword(s):  
Design Method ◽  
Incident Angle ◽  
Stop Band ◽  
Single Layer ◽  
Wireless Systems ◽  
Frequency Selective Surface ◽  
Ultra Wideband ◽  
Band Frequency ◽  
Gain Enhancement ◽  
Polarization Independent

Abstract A single-layer ultra-wideband (UWB) stop-band frequency selective surface (FSS) has several advantages in wireless systems, including a simple design, low debugging complexity, and an appropriate thickness. This study proposes a miniaturized UWB stop-band FSS design. The proposed FSS structure consists of a square-loop and metalized vias that are arranged on a single layer substrate; it has an excellent angle and polarization-independent characteristics. At an incident angle of 60°, the polarization response frequencies of the transverse electric and magnetic modes only shifted by 0.003 f0 and 0.007 f0, respectively. The equivalent circuit models of the square-loop and metallized vias structure are analysed and the accuracy of the calculation is evaluated by comparing the electromagnetic simulation. The 20 × 20 array constitutes an FSS reflector with a unit size of 4.2 mm × 4.2 mm (less than one-twentieth of the wavelength of 3 GHz), which realizes an UWB quasi-constant gain enhancement (in-band flatness is <0.5 dB). Finally, the simulation results were verified through sample processing and measurement; consistent results were obtained. The FSS miniaturization design method proposed in this study could be applied to the design of passband FSS (complementary structure), antennas and filters, among other applications.

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.

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 NOVEL COMPACT UWB FREQUENCY SELECTIVE SURFACE FOR ANGULAR AND POLARIZATION INDEPENDENT OPERATION

2013 ◽  
Vol 40 ◽  
pp. 71-79 ◽  
Author(s):  
Sanjay Baisakhiya ◽  
Ramprabhu Sivasamy ◽  
Malathi Kanagasabai ◽  
Sakthivel Periaswamy
Keyword(s):  
Frequency Selective Surface ◽  
Frequency Selective ◽  
Polarization Independent
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