Novel Low-RCS Circularly Polarized Antenna Arrays via Frequency-Selective Absorber

Han, Ye; Li, Zhu; Bo, Yaming; Che, Wenquan; Li, Bo

doi:10.1109/tap.2019.2939845

Cited by 66 publications

(26 citation statements)

References 19 publications

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“…Therefore, the power flowing from the output port goes to the resistor, which leads the power absorption. As shown in Figure 1, this idea initially stemmed from the frequency selectivity absorbers, 26,27 where the resistors are used as lossy structures to absorb the energy.…”

Section: Theoretical Analysis Of Two Dual-band Fpdsmentioning

confidence: 99%

Design of dual‐band filtering power dividers with designable port‐to‐port isolation network

Liu

Sun

2021

Int J RF Mic Comp-Aid Eng

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In this article, a class of dual-band filtering power dividers is proposed with simultaneous realization of good designable port-to-port isolation. A filtering branch, including two cascaded stub-loaded half-wavelength resonators and coupled-line sections, are introduced together with the proposed isolation network to simultaneously achieve controllable bandwidth, frequency ratio in dual-band power division, as well as the port-to-port isolation. To construct dual-wideband power division, two coupled multimode resonators could be used to form the filtering branches, while the proposed isolation network with additional open stub at each output port is utilized to obtain a wide port-toport isolation band. Theoretically, a design method for analyzing the dualband frequency response of the power division is presented, while a dual-or wide-band isolation is achieved by introducing multiple transmission zeros in the S 32 -magnitude. Finally, two prototype power dividers on the microstripline structure are designed and fabricated. The simulated and measured results agree well with each other, which verify the theoretical predications.

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Section: Theoretical Analysis Of Two Dual-band Fpdsmentioning

confidence: 99%

Design of dual‐band filtering power dividers with designable port‐to‐port isolation network

Liu

Sun

2021

Int J RF Mic Comp-Aid Eng

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“…Switchable EM absorption and radiation is accomplished by changing the states of PIN switches mounted on periodic arrays of metallic three‐loop nested structure 8 . Low RCS circularly polarized radiation is achieved by integrating an antenna array with frequency selective absorber (FSA) array 9 . In‐band RCS reduction of patch array antenna is conceived by using microstrip resonators 10 and electromagnetic band‐gap structures 11 .…”

Section: Introductionmentioning

confidence: 99%

Hybrid frequency selective surface phase cancelation structure based broadband switchable radar cross section reduction

Das

Mandal

2021

Int J RF Microw Comput Aided Eng

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In this paper, a switchable radar cross section (RCS) reduction between the two broadbands' (1‐7 GHz and 4‐10 GHz) has been achieved by just considering the integration of hybrid frequency selective surface (FSS) based phase cancelation structure (PCS) with a modified ground square patch antenna operating at 2.4 GHz. The full metallic ground plane of the conventional microstrip antenna (MSA) is replaced by a 2 × 2 array of band‐stop FSS having the same frequency as that of the MSA. This ground plane modification helps to increase the maximum out‐of‐band RCS reduction from 16.4 dB to 20 dB. The ground modified MSA without any PCS exhibits both in‐band and out‐of‐band maximum RCS reduction of 20 dB over a wideband (1‐7 GHz). A new approach is adopted to form the PCS. It is formed by placing two non‐overlapping hybrid FSSs at different heights above the MSA. The MSA with FSS based ground plane along with the hybrid FSS based PCS exhibits good monostatic and bistatic RCS reduction across 4 to 10 GHz without affecting the radiation characteristics of the conventional MSA. The measured results show a close resemblance to the simulated ones.

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“…More recently an alternative superstrate based solution has been reported in Ref. [7], where a frequency selective absorber (FSA) is designed in conjunction with a 5 GHz circular polarized antenna. Computed and experimental results are used to show that a RCSR of about 10 dB is obtained over a 30% frequency band above and 45% below the transmission window.…”

Section: Introductionmentioning

confidence: 99%

Frequency selective superstrate absorber for wideband RCS reduction of metal‐backed antennas

Machado

Cahill

Fusco

et al. 2021

IET Microwaves Antenna & Prop

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The use of a resistively loaded frequency selective surface (FSS) superstrate is reported as a means to reduce the radar cross‐section (RCS) of metal‐backed antennas. The design methodology is demonstrated by creating a low‐profile absorber which exhibits a transmission window covering the working frequency band (10–10.2 GHz) of a 4 × 4 microstrip patch array. Placing the structure λ/2 above the radiating aperture is shown to reduce the antenna gain by less than 2 dB and have minimal impact on the shape of the beams which are directed at 0° and tilt angles of 22.5° and 45°. Moreover 90% radar backscatter suppression is achieved over 92% of the frequency range 8.85–24 GHz. The perforated metal‐backed FSS superstrate was inkjet printed on a 140 μm thick polyethylene terephthalate (PET) sheet and the conductivity of the silver plating adjusted to achieve the required 40 Ω/sq surface resistance. The experimental results obtained for the standalone microwave absorber, and when integrated with the antenna, are shown to be in close agreement with the computed reflectivity and far field patterns.

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Novel Low-RCS Circularly Polarized Antenna Arrays via Frequency-Selective Absorber

Cited by 66 publications

References 19 publications

Design of dual‐band filtering power dividers with designable port‐to‐port isolation network

Design of dual‐band filtering power dividers with designable port‐to‐port isolation network

Hybrid frequency selective surface phase cancelation structure based broadband switchable radar cross section reduction

Frequency selective superstrate absorber for wideband RCS reduction of metal‐backed antennas

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