Beam Steering Transmitarray Using Tunable Frequency Selective Surface With Integrated Ferroelectric Varactors

Sazegar, Mohsen; Zheng, Yelong; Köhler, Christian; Maune, Holger; Nikfalazar, Mohammad; Binder, Joachim R.; Jakoby, Rolf

doi:10.1109/tap.2012.2213057

Cited by 133 publications

(63 citation statements)

References 68 publications

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“…The dielectric constant of the BMN thin films was extracted from the measured capacitance data using a partial capacitance method and an analytical model previously derived by Farnell et al [19,[21][22][23][24]. The measured capacitance, C exp , consists of the capacitance of the stray fields in the ambient space (air), C air , the capacitance of the BMN thin film layer, C film , and the capacitance of the substrate, C substrate .…”

Section: Microwave Dielectric Properties Measurementsmentioning

confidence: 99%

Effects of substrate on the crystalline structure and microwave dielectric properties of Bi1.5Mg1.0Nb1.5O7 sol–gel thin films

Dong

et al. 2015

Journal of Alloys and Compounds

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Section: Microwave Dielectric Properties Measurementsmentioning

confidence: 99%

Effects of substrate on the crystalline structure and microwave dielectric properties of Bi1.5Mg1.0Nb1.5O7 sol–gel thin films

Dong

et al. 2015

Journal of Alloys and Compounds

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“…Integrating varactor diodes within FSS allows their resonant frequencies to be altered by a bias voltage [7]. This has been used previously to steer directional antenna beams [8] and to scramble GSM signals passing through a wall [9]. Using this technique, the transmitted phase of an antenna loaded with such FSS can produce a phase modulator suitable for use in Phase Shift Keying (PSK) communication systems.…”

Section: Introductionmentioning

confidence: 99%

Frequency selective surface loaded antenna for direct antenna modulation

Henthorn

Ford

O’Farrell

2017

2017 11th European Conference on Antennas and Propagation (EUCAP)

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Abstract-A reconfigurable antenna loaded with Frequency Selective Surfaces (FSS) to achieve direct antenna phase modulation is presented and simulated. Placing FSS with integrated varactor diodes into a monopole-fed cavity allows control of the transmitted phase of a carrier signal with a bias voltage. As such, Direct Antenna Modulation (DAM) can be achieved, producing a phase modulator that can be included in a low complexity transmitter. Simulation shows such an antenna can achieve QPSK modulation with between 3.5dB and 4.5dB magnitude variation between constellation points with acceptable phase stability with radiation angle in the antenna 3dB beamwidth.Index Terms-reconfigurable antenna, frequency selective surfaces, phase shift keying.

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“…The scattering characteristics of AFSS can be adjusted flexibly by regulating the current or voltage applied to it. This property makes it applied in the design of radome [1], implementation of beam control [2] and suppression of radio frequency interference (RFI) [3], etc. In [4], Tennant and Chambers from the UK's University of Sheffield designed phase-modulated surface (PMS), which is composed of single AFSS layer and one mental background plane.…”

Section: Introductionmentioning

confidence: 99%

The Optimization of Switching Scheme in Multi-Layer Phase-Modulated Surface and Its Influence on Scattering Properties

Fu¹,

Hong²

2016

PIER M

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Abstract-To improve absorbing properties of phase-modulated surface (PMS), the multi-active-layer PMS composed of multiple active frequency-selective surface (AFSS) layers and one background plane is theoretically studied using time-modulation theory in this paper. The optimization of PMS's switching scheme using differential evolution (DE) algorithm is also proposed for minimizing scattering echo energy at the incident frequency. We provide analytical formulation for the scattering problem and obtain the angular scattering pattern of PMS after optimization. Simulation results indicate that the optimized switching scheme is beneficial for reducing the spatial coverage of scattering echo at incident frequency. This coverage can be further confined by the increasing number of active layers in PMS. Furthermore, it is shown that floor effect appears when the number of active layers reaches a certain value, which limits the PMS structure conversely.

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Beam Steering Transmitarray Using Tunable Frequency Selective Surface With Integrated Ferroelectric Varactors

Cited by 133 publications

References 68 publications

Effects of substrate on the crystalline structure and microwave dielectric properties of Bi1.5Mg1.0Nb1.5O7 sol–gel thin films

Effects of substrate on the crystalline structure and microwave dielectric properties of Bi1.5Mg1.0Nb1.5O7 sol–gel thin films

Frequency selective surface loaded antenna for direct antenna modulation

The Optimization of Switching Scheme in Multi-Layer Phase-Modulated Surface and Its Influence on Scattering Properties

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