Broadband Low-RCS Circularly Polarized Antenna Realized by Nonuniform Metasurface

Gao, Xi; Yin, Sijie; Wang, Guofu; Xue, Chunhua; Xie, Xianming

doi:10.1109/lawp.2022.3195782

Cited by 15 publications

(6 citation statements)

References 23 publications

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“…Meanwhile, it can be observed that a 10 dB RCSR is achieved over the frequency range from 5.3-18.3 GHz with a maximum deduction of 34.1 dB around 17.2 GHz, the other two peaks of RCSR reach 33.1 and 25.6 dB at 13.4 and 6.3 GHz, respectively, as shown in figure 11(a). Figure 11(b) shows a good agreement between left-handed circular polarization (LHCP) and right-handed circular polarization (RHCP) results [47]. It can be seen that the designed FSR has a good property of polarization insensitivity.…”

Section: Performance Of the Fsrmentioning

confidence: 59%

Frequency selective rasorber based on cross bend resonators for wideband transmission and absorption

Li,

Wang,

Wang

et al. 2024

J. Phys. D: Appl. Phys.

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The wideband absorption and transmission of frequency-selective rasorber (FSR) remain a persistent challenge in the application of radar devices. In this article, a novel high performance wideband FSR design based on cross bend resonators (CBR) was proposed. The FSR consists of an upper absorption lossy layer, which offers broad absorption and transmission bands, and a lower bandpass frequency-selective surface (FSS) that enables a highly selective transmission of incident electromagnetic wave. Full wave simulation results showed that this novel design achieves an absorption bandwidth of 83.7% with more than 90% absorptivity in the frequency range of 5.2-12.7 GHz. Furthermore, the passband's fractional bandwidth (FBW) for the insertion loss (IL) less than -3 dB is 33.9%, ranging from 14.9 to 21 GHz, with the minimum IL recorded at 0.69 dB at 17.7 GHz. To further verify the proposed method, a prototype FSR with 10×10 units of 120 mm×120 mm was fabricated and the performance of the FSR was tested. The experiment results were in good agreement with the simulated results, and it showed a significant monostatic radar cross-section (RCS) reduction in the frequency range of 5.3 GHz to 18.3 GHz compared with a metallic plane of the same size.

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Section: Performance Of the Fsrmentioning

confidence: 59%

Frequency selective rasorber based on cross bend resonators for wideband transmission and absorption

Li,

Wang,

Wang

et al. 2024

J. Phys. D: Appl. Phys.

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“…In [14], CP patch antenna with H-shaped metasurface structure has high antenna gain but its ARBW is narrow. In [15], CP patch antenna array with irregular rectangular-shaped metasurface structure achieves wide IBW, ARBW, and high gain. However, it also suffers from a complicated feed network and large dimensions.…”

Section: Resultsmentioning

confidence: 99%

Broadband Multi-Shaped Metasurface Circularly Polarized Antenna With Suppressed Non-CP Radiation Modes

Supreeyatitikul,

Lertwiriyaprapa,

Chudpooti

et al. 2023

IEEE Open J. Antennas Propag.

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In this research, a multi-shaped metasurface broadband circularly polarized (CP) patch antenna with parasitic elements is proposed for 5G new radio (NR) applications. The proposed metasurface CP patch antenna comprises triple-layered substrates without air gap. The upper layer sits with multi-shaped metasurface elements and parasitic patches. The middle layer consists of an L-shaped slot functioning as the ground plane, and the lower layer contains a microstrip and a fan-shaped stub functioning as the feed line. The proposed metasurface CP patch antenna with parasitic elements is evaluated using characteristic mode analysis (CMA). The CMA results indicate that the modal significance of Modes 1 and 2 of the multi-shaped metasurface CP antenna are orthogonal, giving rise to circular polarization. The non-CP radiation of Modes 3 and 4 are suppressed by using the multi-shaped metasurface elements and parasitic patches. The measured impedance bandwidth and axial ratio bandwidth are 42.85% (3.4 -4.9 GHz) and 38% (3.27 -4.6 GHz), achieving the maximum gain of 7.23 dBic at 3.7 GHz. The experiments demonstrate that the multi-shaped metasurface CP patch antenna with parasitic elements is suitable for 5G NR wireless applications. The novelty of this study is attributed to its utilization of multi-shaped metasurface elements and parasitic patches, which effectively suppress non-circularly polarized radiation modes.INDEX TERMS Characteristic mode analysis, impedance, metasurfaces, patch antennas, substrates.

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“…It can be observed that a simple rotation adjustment for the polarization state switch has little to no impact on the radiated performance, validating this design effectively. To further validate the PC properties of HMS, CMA [16][17][18][19] was then utilized to clearly explain the design process, considering the inherent properties of the conductor structure calculated without the addition of excitation. To achieve circular polarization (CP) properties with CMA-aided design, the following conditions must be met: Firstly, ensure that the two MS values are equal and exceed 0.707; Secondly, maintain a 90° phase difference between the CAs of the two modes; Thirdly, confirm that the current surfaces generated by the two modes are orthogonal; Lastly, ensure consistency in the direction of maximum radiation.…”

Section: Lhcp Ihms−antenna Design and Analysismentioning

confidence: 99%

Wideband Circularly Polarization and High-Gain of a Slot Patch Array Antenna Realized by a Hybrid Metasurface

Chen,

Yang,

et al. 2024

Sensors

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In this paper, a patch array antenna with wideband circular polarization and high gain is proposed by utilizing a hybrid metasurface (MS). A corner-cut slotted patch antenna was chosen as the source due to the possible generation of CP mode. The hybrid MS (HMS), consisting of a receiver MS (RMS) arranged in a 2 × 2 array of squared patches and a linear-to-circular polarization conversion (LCPC) MS surrounding it was then utilized as the superstrate driven by the source. The LCPC MS cell is a squared-corner-cut patch with a 45° oblique slot etched, which has the capability for wideband LCPC. The LCPC unit cell possesses wideband PC capabilities, as demonstrated by the surface current analysis and S-parameter simulations conducted using a Floquet–port setup. The LP EM wave radiated by the source antenna was initially received by the RMS, then converted to a CP wave as it passed through the LCPC MS, and ultimately propagated into space. To further enhance the LCPC properties, an improved HMS (IHMS) was then proposed with four cells cut at the corners, based on the original HMS design. To verify this design, both CMA and E-field were utilized to analyze the three MSs, indicating that the IHMS possessed a wideband LCPC capability compared to the other two MSs. The proposed antenna was then arranged in a 2 × 2 array with sequential rotation to further enhance its properties. As demonstrated by the measurements, the array antenna achieved an S11 bandwidth of 60.5%, a 3 dB AR bandwidth of 2.85 GHz, and a peak gain of 15.1 dBic, all while maintaining a low profile of only 0.09λ0.

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Broadband Low-RCS Circularly Polarized Antenna Realized by Nonuniform Metasurface

Cited by 15 publications

References 23 publications

Frequency selective rasorber based on cross bend resonators for wideband transmission and absorption

Frequency selective rasorber based on cross bend resonators for wideband transmission and absorption

Broadband Multi-Shaped Metasurface Circularly Polarized Antenna With Suppressed Non-CP Radiation Modes

Wideband Circularly Polarization and High-Gain of a Slot Patch Array Antenna Realized by a Hybrid Metasurface

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