A measured FSS radome with two absorptive bands separated by one passband

Wu, Weiwei; Chen, Xi; Feng, Qinghua; Zhang, Xiaofa; Chang, Zhu

doi:10.23919/eucap.2017.7928255

Cited by 7 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Frequency-selective surfaces (FSSs) have been widely investigated in recent years, both in passive (FSS) and reconfigurable FSS (RFSS) variations. Intelligent walls [1][2][3][4], radomes [5,6], and reconfigurable antennas [7][8][9] are some examples of their applications. Essentially, an FSS consists of basic elements etched on a dielectric substrate, arranged in a planar periodic structure, providing filtering properties.…”

Section: Introductionmentioning

confidence: 99%

Design of reconfigurable frequency‐selective surfaces including the PIN diode threshold region

Mamedes

Neto

Silva

et al. 2018

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

Reconfigurable frequency-selective surfaces (RFSSs) are of significant interest in applications, such as secure communication systems or tunable radomes, to improve indoor communication and smart antennas. In order to change the frequency-selective surface (FSS) characteristics, and therefore its frequency response, conventional methods include loading with active semiconductor devices such as varactors, PIN diodes, Schottky diodes and radio-frequency microelectromechanical system. Another possibility is the use of mechanical adjusts, such as spring resonators or mechanical rotation. When PIN diodes are used, commonly only the reverse and forward regions, OFF and ON states, respectively, are considered. In this study, the implementation of an RFSS is described, using PIN diodes as active components. The RFSS is based on the fourarms star geometry, and initial design equations and procedures are presented. Numerical and measured results are shown for different project stages, with a very good agreement. In addition to obtaining two distinct resonant frequencies, due to the OFF and ON states, a third situation is included, considering the PIN diode threshold region when the FSS becomes practically transparent, which is an interesting feature with potential applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Design of reconfigurable frequency‐selective surfaces including the PIN diode threshold region

Mamedes

Neto

Silva

et al. 2018

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

show abstract

“…15 There are other structures based on resistive films but these films cause big insertion loss. 16 To address the above issues, three-dimensional (3D) FSRs have been introduced, but they suffer from greater thickness, assembling, and practical issues. 17 So, to address the concerns such as complex topologies, bulky unit cells, polarization sensitivity, and other factors like stability with lesser angles, lesser operational bandwidth, higher insertion loss, and so forth 6,[18][19][20][21][22][23][24][25][26] this novel design has been presented which can overcome these limitations.…”

Section: Introductionmentioning

confidence: 99%

Low profile polarization‐insensitive wideband rasorber with in‐band transmission

Sambhav

Ghosh

2022

Int J RF Mic Comp-Aid Eng

View full text Add to dashboard Cite

A dual-polarized wide-band rasorber with in-band transmission has been presented in this study. Our proposed design comprises a modified swastika design on the upper layer and a square slotted design on the bottom layer. The top layer is loaded with lumped resistors on the top pattern in an even manner resulting in broadband absorption. The square slot designed on the lower layer is accountable for in-the-band transmission. The total thickness of the design is only 0.058 λ L (λ L corresponds to the lowest frequency) and possesses strong fractional bandwidth of around 124%. The whole design shows a wideband absorption whose reflection coefficient is less than À10 dB from 1.7 to 7.25 GHz, and an insertion loss of 0.6 dB in the transmission band at 4.9 GHz. The originality of the proposed design lies in its miniaturized design, good angular stability, high fractional bandwidth, and dual-polarized response. For a comprehensive analysis, we have investigated the distribution of surface current, its corresponding circuit model, and several other parameters. Finally, the prototype has been fabricated and validated, it has been found that there is a decent agreement between measured and simulated responses.

show abstract

“…Reference 20 suffers from low angular stability. Simple resistive films have been used to develop the out‐of‐band absorption bands, but the resistive film causes large insertion loss in the passband 21 . To address the above issues, 3‐D FSR structures have recently been introduced, but their practical applications are limited due to their larger thicknesses and difficulty in assembling 3,22 .…”

Section: Introductionmentioning

confidence: 99%

“…Simple resistive films have been used to develop the out-of-band absorption bands, but the resistive film causes large insertion loss in the passband. 21 To address the above issues, 3-D FSR structures have recently been introduced, but their practical applications are limited due to their larger thicknesses and difficulty in assembling. 3,22 A few other geometries have also been reported, but they suffer from complicated topologies, large unit cell sizes, and/or lower angular stability.…”

Section: Introductionmentioning

confidence: 99%

A polarization‐insensitive broadband rasorber with in‐band transmission response

Sharma

Saikia

Malik

et al. 2020

Micro & Optical Tech Letters

View full text Add to dashboard Cite

In this letter, a polarization‐insensitive broadband rasorber structure with in‐band transmission response has been presented. The proposed structure comprises a periodic arrangement of convoluted cross‐dipole pattern in the top layer and square slot geometry in the bottom layer. Lumped resistors are symmetrically mounted across the top pattern to result in wideband absorption, whereas in‐band transmission is obtained by careful design of the square slot in the bottom layer. The overall structure exhibits a broad absorption band (having reflection coefficient below −10 dB) in the range of 2.18 to 9.80 GHz, and the transmission band appears at 6 GHz with an insertion loss of 0.56 dB. The novelty of the proposed design lies in its compact topology, polarization‐insensitivity, angular stability, and in‐band transmission response unlike the existing rasorber structures. Surface current distribution, equivalent circuit model, and several parametric variations have also been illustrated for in‐depth analysis. A sample prototype has been fabricated and the measured results show a good agreement with the simulated responses, under normal as well as oblique incidence.

show abstract

A measured FSS radome with two absorptive bands separated by one passband

Cited by 7 publications

References 10 publications

Design of reconfigurable frequency‐selective surfaces including the PIN diode threshold region

Design of reconfigurable frequency‐selective surfaces including the PIN diode threshold region

Low profile polarization‐insensitive wideband rasorber with in‐band transmission

A polarization‐insensitive broadband rasorber with in‐band transmission response

Contact Info

Product

Resources

About