Blind spot mitigation in phased array antenna using metamaterials

Crepin, T.; Martel, Cédric; Gabard, B.; Boust, Fabrice; Martinaud, Jean-Paul; Dousset, T.; Rodríguez-Ulibarri, Pablo; Beruete, Miguel; Loecker, Claudius; Bertuch, Thomas; Marcotegui, Jose Antonio; Maci, S.

doi:10.1109/radar.2014.7060390

Cited by 6 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The frequency responses of the proposed MFSS for both TE and TM modes were predicted to remain unchanged as the oblique angles increased from 0° to 50°. However, according to Figure 6, the Wood's Anomalies phenomenon also known as the scan blindness phenomenon [48][49][50] was observed when the oblique angle increased up to 50°, especially for frequency ranging higher than 15 GHz (TE mode) and 19 GHz (TM mode). Wood's Anomalies phenomenon can be defined as "rapid variations in the intensity of the various diffracted spectral orders in certain narrow frequency bands" [48].…”

Section: Wideband Mfss-evolution Of Unit Cell (Opaque)mentioning

confidence: 99%

Optically Transparent Tri-Wideband Mosaic Frequency Selective Surface with Low Cross-Polarisation

et al. 2022

View full text Add to dashboard Cite

Acquiring an optically transparent feature on the wideband frequency selective surface (FSS), particularly for smart city applications (building window and transportation services) and vehicle windows, is a challenging task. Hence, this study assessed the performance of optically transparent mosaic frequency selective surfaces (MFSS) with a conductive metallic element unit cell that integrated Koch fractal and double hexagonal loop fabricated on a polycarbonate substrate. The opaque and transparent features of the MFSS were studied. While the study on opaque MFSS revealed the advantage of having wideband responses, the study on transparent MFSS was performed to determine the optical transparency application with wideband feature. To comprehend the MFSS design, the evolutionary influence of the unit cell on the performance of MFSS was investigated and discussed thoroughly in this paper. Both the opaque and transparent MFSS yielded wideband bandstop and bandpass responses with low cross-polarisation (−37 dB), whereas the angular stability was limited to only 25°. The transparent MFSS displayed high-level transparency exceeding 70%. Both the simulated and measured performance comparison exhibited good correlation for both opaque and transparent MFSS. The proposed transparent MFSS with wideband frequency response and low cross-polarisation features signified a promising filtering potential in multiple applications.

show abstract

Section: Wideband Mfss-evolution Of Unit Cell (Opaque)mentioning

confidence: 99%

Optically Transparent Tri-Wideband Mosaic Frequency Selective Surface with Low Cross-Polarisation

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The blind direction of antenna arrays is the result of interaction between the Bloch array eigenmodes and the propagating surface waves or leaky waves [76]. The blind spot causes a failure of sending and receiving signals in that space angle region [76].…”

Section: Designmentioning

confidence: 99%

Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature

Özis

Osipov

Eibert

2017

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

A radome is an integral part of almost every antenna system, protecting antennas and antenna electronics from hostile exterior conditions (humidity, heat, cold, etc.) and nearby personnel from rotating mechanical parts of antennas and streamlining antennas to reduce aerodynamic drag and to conceal antennas from public view. Metamaterials are artificial materials with a great potential for antenna design, and many studies explore applications of metamaterials to antennas but just a few to the design of radomes. This paper discusses the possibilities that metamaterials open up in the design of microwave radomes and introduces the concept of metaradomes. The use of metamaterials can improve or correct characteristics (gain, directivity, and bandwidth) of the enclosed antenna and add new features, like band-pass frequency behavior, polarization transformations, the ability to be switched on/off, and so forth. Examples of applications of metamaterials in the design of microwave radomes available in the literature as well as potential applications, advantages, drawbacks, and still open problems are described.

show abstract

“…This approach was particularly inspired by [15]. However, the final wire medium metaradome (WMM) is adapted to the fabrication constrains given by the antenna architecture [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…So in this particular case, part of the total energy is transferred from the 0-order (we could say also main beam) to the 1-order. In order to see the connection between the blind spot and the grating lobe, infinite array simulation results of the reflection coefficient (|S11|) and transmitted energy (|S2(m), 1|) for m = 0 and m = À1 grating orders can be found in [16,17] . At the onset of the grating lobe (around 34.5°) it is observed that the reflection increases up to about 0 dB (the calculation with Eq.…”

Section: Introductionmentioning

confidence: 99%

“…In terms of scan impedance this condition leads to a singularity going to infinity and therefore resulting in an extreme impedance mismatching [1]. However, for finite arrays this impedance singularity is less sharp leading to a reduction of radiated power rather than a deep null, as demonstrated in [16,17]. Figure 4 is reproduced here for completeness.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental demonstration of metamaterials application for mitigating scan blindness in phased array antennas

Rodríguez-Ulibarri

Crepin

Martel

et al. 2016

EPJ Applied Metamaterials

Self Cite

View full text Add to dashboard Cite

-This paper presents two metamaterial-inspired solutions to mitigate the scan blindness effects in a phased array antenna. In the first solution, portions of a bed of nails are introduced in the radome to prevent the excitation of surface waves. In the second solution, a superstrate metasurface is designed to synthesize a permittivity tensor optimized to achieve a wide angle impedance matching. In both approaches, the numerical simulations are successfully compared with measurements of a phased array antenna prototype with 100 elements. The wire medium-based solution reveals an effective way for reducing the blind-spot in a wide bandwidth, while the metaradome has been found less suitable for the same purpose.

show abstract

Blind spot mitigation in phased array antenna using metamaterials

Cited by 6 publications

References 7 publications

Optically Transparent Tri-Wideband Mosaic Frequency Selective Surface with Low Cross-Polarisation

Optically Transparent Tri-Wideband Mosaic Frequency Selective Surface with Low Cross-Polarisation

Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature

Experimental demonstration of metamaterials application for mitigating scan blindness in phased array antennas

Contact Info

Product

Resources

About