Switchable Frequency Selective Surface for Reconfigurable Electromagnetic Architecture of Buildings

Kiani, Ghaffer I.; Ford, K.L.; Olsson, L.G.; Esselle, Karu P.; Panagamuwa, Chinthana

doi:10.1109/tap.2009.2037772

Cited by 103 publications

(48 citation statements)

References 10 publications

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“…Over past years, FSSs have been extensively used in a variety of applications such as designing stealth radomes for aircrafts, dichroic reflector antennas, EM shielding for EMC and RCS reduction by EM absorbers to name a few [2]. A passive FSS has some limits because it offers no flexibility once fabricated, whereas an Active FSS (AFSS) allows the potentiality of control by changing the behavior of the surface [3][4][5][6][7][8][9][10][11][12][13][14]. As far as we know, the reconfigurable AFSSs can be divided into two main categories.…”

Section: Introductionmentioning

confidence: 99%

“…As far as we know, the reconfigurable AFSSs can be divided into two main categories. One is switchable AFSSs which can switch frequency response between transmission and reflection at a specific frequency [3][4][5][6][7][8], and the other is tunable AFSSs whose frequency response can be shifted and tuned within a certain range [9][10][11][12][13][14]. The square-loop switchable AFSSs were realized by loading PINs inside elements or adjacent space, which were the first proposed AFSS as far as we know [3,4].…”

Section: Introductionmentioning

confidence: 99%

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A Dual-Polarized Switchable Active Frequency Selective Surface for Lte-D Band

Yang¹,

Li²,

Cao³

et al. 2016

PIER M

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Abstract-A dual-polarized active frequency selective surface (AFSS) with switch function at LTE-D band is proposed in this paper. Double coupled metallic meandered structures on a one-layer substrate loaded PIN diodes are designed carefully to realize the band-pass characteristic at 2.6 GHz when PINs are OFF and the rejection characteristic when PINs are ON. The proposed model requires no additional biasing lines, and the amount of PINs is acceptable and affordable, which contribute to the simplicity and practicality of this AFSS in real applications. A simple equivalent circuit model (ECM) is given to better understand the design. Through full-wave simulation results, the polarization characteristics under TE and TM are almost the same, and the angle-stability stays well till 45 • . For necessary verification, one finite FSS prototype was fabricated, which was changed to one switchable AFSS by welding PINs and external feeder lines. The measured results of transmission coefficient are obtained by free space test method in the microwave anechoic chamber and agree well with the simulated ones.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Dual-Polarized Switchable Active Frequency Selective Surface for Lte-D Band

Yang¹,

Li²,

Cao³

et al. 2016

PIER M

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“…Different from the active diodes used in FSS reported early [8][9][10], the diodes in self-actuated protection are directly triggered by the impinging electromagnetic wave. Thus, a bias network is not required.…”

Section: Introductionmentioning

confidence: 99%

Ultra Wide Band Response of an Electromagnetic Wave Shield Based on a Diode Grid

Zhang¹,

Yuan²,

Liu³

2013

PIER

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Abstract-This paper investigates Ultra Wide Band (UWB) response of a self-actuated electromagnetic wave shield based on a diode grid both in frequency and time domain. The investigation is first carried out on a shield valid for an incident wave polarized at a specific direction only, then extended to a shield effective for an incident wave polarized at an arbitrary direction. In the frequency domain, two linear analysis methods are used to study the properties of the diode grid over the frequency range from 0.01 to 10 GHz. One method is the microwave network analysis. Another is simulating the diode grid by a linear equivalent circuit instead of a diode. In the time domain, the property of the shield is studied with respect to a broadband impulse, where the diode is described by its SPICE circuit model including the nonlinear property. The results show that the diode grid works well as a self-actuated electromagnetic power selective surface (PSS) in a certain frequency range. The diode grid is strongly frequency dependent. The operating frequency band relies on the reactive elements in the diode grid. In order to extend the operating frequency to a high band, smaller cell size and smaller junction capacitance should be employed.

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“…Besides the conventional applications of FSS in filters, polarizers, subreflectors, and radomes, recent applications of FSS include artificial magnetic conductors [9][10][11][12], electromagnetic bandgap materials [13,14], superstrate antenna arrays [15], metamaterials [16], and electromagnetic architecture of buildings [17]. Furthermore, active or reconfigurable frequency selective surfaces (RFSS) have become attractive due to their capability to dynamically change their resonant frequencies [18,19]. This flexibility allows the RFSS to be utilized in various applications, particularly when the surrounding environment is both complex and dynamic, and the adjustment of the resonant frequencies needs to be achieved rapidly.…”

Section: Introductionmentioning

confidence: 99%

An Active Ring Slot With Rf Mems Switchable Radial Stubs for Reconfigurable Frequency Selective Surface Applications

Martinez-Lopez¹,

Rodriguez-Cuevas²,

Martynyuk³

et al. 2012

PIER

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Abstract-An active ring slot resonator loaded by switchable radial stubs is investigated. It is shown that this element can be used as the unit cell of a switchable reconfigurable frequency selective surface (RFSS). Equivalent circuit and full-wave mathematical models are obtained to evaluate the reflection characteristics of the RFSS based on this element. The possibility to obtain different resonant transmission frequencies is discussed. The mathematical model developed is used to design an X band RFSS capable of obtaining resonant frequencies at 9.65, 10.28, 10.83 and 12.05 GHz. Commercially available RF MEMS switches are used to evaluate the effect of the off-state capacitances over the response of the periodic structure. To validate the numerical simulation results, different active and passive diaphragms were designed, fabricated, and tested using the waveguide simulator. A good agreement between numerical and measured results was found.

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Switchable Frequency Selective Surface for Reconfigurable Electromagnetic Architecture of Buildings

Cited by 103 publications

References 10 publications

A Dual-Polarized Switchable Active Frequency Selective Surface for Lte-D Band

A Dual-Polarized Switchable Active Frequency Selective Surface for Lte-D Band

Ultra Wide Band Response of an Electromagnetic Wave Shield Based on a Diode Grid

An Active Ring Slot With Rf Mems Switchable Radial Stubs for Reconfigurable Frequency Selective Surface Applications

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