Varactor-Tunable Second-Order Bandpass Frequency-Selective Surface With Embedded Bias Network

Ebrahimi, Amir; Shen, Zhongxiang; Withayachumnankul, Withawat; Al-Sarawi, Said F.; Abbott, Derek

doi:10.1109/tap.2016.2537378

Cited by 147 publications

(64 citation statements)

References 47 publications

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“…According to References and , Z R needs to meet general absorption condition (GAC) at the absorption bands, and be infinite at notch band. The series RLC is mainly used to meet the GAC.…”

Section: Equivalent Circuit Analysis Of Bnfsamentioning

confidence: 99%

“…However, the transmission band of the lossy layer of the 2‐D AFSSs and BNFSAs in previously published papers is fixed. Nowadays, the vast demands and rapid developments in multifunctional and multi‐standard communication systems necessitate the tunable operating band . Nevertheless, as far as we know, no design of BNFSA with tunable notch band has been proposed in the previously published paper.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, the vast demands and rapid developments in multifunctional and multi-standard communication systems necessitate the tunable operating band. 25 Nevertheless, as far as we know, no design of BNFSA with tunable notch band has been proposed in the previously published paper. Therefore, we focus on the design of BNFSA with switchable notch band.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of switchable band‐notched frequency selective absorber

Guo

Chen

Zheng

et al. 2019

Int J RF Microw Comput Aided Eng

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An active band‐notched frequency selective absorber (BNFSA) with switchable notch band is proposed in this article. The BNFSA is a two‐layer structure composed of a lossy layer at the top and a ground plane at the bottom, separated by an air spacer. The element of the lossy layer is a lumped‐resistor‐loaded metallic dipole with a parallel LC resonance structure, which is realized by complementary n‐shaped resonator (CnR) inserted in the center, and PIN diode is welded at two arms of CnR. The bias circuit printed on the back of the substrate of the lossy layer connects to anode and cathode of the diode by via hole and isolates by the inductor. Simulation results show that the notch bands are located at 4.50 and 6.81 GHz when the diode sets to ON and OFF, respectively. To validate the performance of switchable BNFSA, the prototypes are fabricated and measured, reasonable agreement between simulated and measured results is obtained.

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“…According to References and , Z R needs to meet general absorption condition (GAC) at the absorption bands, and be infinite at notch band. The series RLC is mainly used to meet the GAC.…”

Section: Equivalent Circuit Analysis Of Bnfsamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of switchable band‐notched frequency selective absorber

Guo

Chen

Zheng

et al. 2019

Int J RF Microw Comput Aided Eng

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“…The earliest study on active reconfigurable frequency surface came from the loading elements in the periodic structure of FSS mentioned by Lee and Fong in 1972 . In 1989, Epp et al found that the connection or disconnection of the metal surface structure of FSS through lumped elements could effectively tuned the resonance frequency of cross band‐passed FSS.…”

Section: Introductionmentioning

confidence: 99%

A reconfigurable frequency selective surface with wide reconfigurable passband and angular stability property

Yang

Zhai

et al. 2020

Micro & Optical Tech Letters

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In this article, a reconfigurable frequency selective surface (RFSS) with a wide reconfigurable passband and angular stability property is proposed. In this design, The RFSS consists of three metallic layers and two thin dielectric substrates with metallic via holes. Tunable electromagnetic characteristics are achieved by loading varactor diodes. Because of the symmetry of the structure and the insertion of metal via holes, the RFSS is insensitive to the incidence of TE and TM polarization, thus improving angular stability. The proposed RFSS can be tuned from 5.4 to 15.96 GHz when the incident angle ranges from 0° to 60°. The RFSS was made and tested to verify the proposed design. The proposed RFSS has good performances, which are verified by simulation and measurement results.

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“…A well-established conventional method for tuning microwave devices is to use active semiconductor devices. Electronically tunable FSS can also be realized through this conventional method; now a considerable amount of different electronically tunable FSSs have been proposed; they were just loading several active semiconductor devices, such as PIN diodes (Fabian-Gongora et al, 2015;Kiani, 2008;Kiani & Bird, 2011;Li, 2016;Li et al, 2017;Yang et al, 2016) or varactors (Bayatpur & Sarabandi, 2010;Ebrahimi et al, 2016;Huang et al, 2015;Li et al, 2016;Pan et al, 2013;Zhang et al, 2012Zhang et al, , 2016 in each unit cell. In this way, the frequency responses can be tuned in real time by changing the state of the PIN diodes or varactors through an external direct current (DC) bias voltage.…”

Section: Introductionmentioning

confidence: 99%

Varactor‐Tunable Frequency Selective Surface With an Appropriate Embedded Bias Network

et al. 2018

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In this work, a varactor‐tunable frequency selective surface (FSS) is proposed; it is based on a common FSS composed of annular ring slot cells, in which four varactors are loaded on each annular ring slot to dynamically tune its resonant frequency in real time. In addition, an appropriate embedded bias network is added to introduce a same direct current bias voltage for each varactor. Numerical simulations demonstrate that the resonant‐frequency of the proposed FSS can be tuned over a 77.2% wide frequency range from 2.73 to 6.16 GHz by altering the capacitance of the varactors from 1.0 to 0.1 pF; moreover, the embedded bias network has little effect on the band‐pass response, and the minimum of the reflection coefficients is less than −24 dB at all times. Finally, one effective experimental validation is carried out. The proposed tunable FSS possesses the merits of wide tuning range and high transmittance; thus, it has great potential applications in the design of tunable radomes or adaptive screening of unwanted wireless transmissions.

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Varactor-Tunable Second-Order Bandpass Frequency-Selective Surface With Embedded Bias Network

Cited by 147 publications

References 47 publications

Design of switchable band‐notched frequency selective absorber

Design of switchable band‐notched frequency selective absorber

A reconfigurable frequency selective surface with wide reconfigurable passband and angular stability property

Varactor‐Tunable Frequency Selective Surface With an Appropriate Embedded Bias Network

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