Dual-Circularly Polarized Spin-Decoupled Reflectarray With FSS-Back for Independent Operating at <i>Ku</i>-/<i>Ka</i>-Bands

Xu, Ping; Li, Long; Li, Ruijie; Liu, Haixia

doi:10.1109/tap.2021.3076518

Cited by 34 publications

(16 citation statements)

References 13 publications

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“…On one hand, various resonant elements are printed on a single-layer substrate. [3][4][5][6][7][8][9] On the other hand, a stacked configuration is used where each layer works at different frequencies. [10][11][12][13][14] For the first case, the mutual coupling of different resonant elements affects the antenna performance due to the limited space, which increases the complexity of the design.…”

Section: Introductionmentioning

confidence: 99%

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Dual polarized reflectarray antenna for operation in X and Ku bands

Cai

Cao

et al. 2022

Micro & Optical Tech Letters

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A stacked structure element consists of an arc phoenix patch and an I‐shaped slot is proposed for designing dual‐band reflectarray antenna. The arc phoenix element operates at Ku band, which above the I‐shaped slot element operating at X band. The advantages of this configuration are that the smaller size phoenix element has less shielding of the reradiation energy, and the property of the bottom substrate has no effect on up‐layer due to the I‐shaped element severs as ground plane. Furthermore, two orthogonal polarizations are produced by the radiation characteristics of the slot and the metal strip to eliminate coupling. Based on the element, a reflectarray antenna with a dimension of 140 mm generating two focused beams at orthogonal plane has been simulated, fabricated, and measured. The simulated and measured results are in good agreement in X and Ku bands.

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Section: Introductionmentioning

confidence: 99%

“…There are basically two methods of designing dual‐band reflectarray in recent years. On one hand, various resonant elements are printed on a single‐layer substrate 3–9 . On the other hand, a stacked configuration is used where each layer works at different frequencies 10–14 .…”

Section: Introductionmentioning

confidence: 99%

Dual polarized reflectarray antenna for operation in X and Ku bands

Cai

Cao

et al. 2022

Micro & Optical Tech Letters

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“…RAs with dual-band dual-CP features are highly-desirable for applications such as high throughput satellite (HTS) communications due to their simultaneous polarization and frequency discrimination capability. So far, only a few RA designs have been reported for accomplishing the dual-band dual-CP performance in the literature [34]- [35], [37]. A dualband dual-CP RA with a frequency ratio of 1.16 is presented in [34].…”

mentioning

confidence: 99%

“…However, due to the bandwidth limitation of both the CP-to-LP polarizer [36] and the dual-band dual-LP element, the 1-dB gain bandwidths are only 1.65% and 2.56% in the lower and upper band, respectively. More recently, another dual-band dual-CP RA with a frequency ratio of 2.4 was reported by utilizing multi-functional-substrate RA elements separated by an FSS [37]. It obtains bandwidths of 14.4% (11.7%) and 7.1% (11.8%) for the RHCP and LHCP beams at Ku-band (Ka-band) with both the gain variation and AR < 3 dB.…”

mentioning

confidence: 99%

“…[35] where two substrates were employed (one for dual-band CP-to-LP polarizer, and one for dual-band dual-LP RA), or even to Ref. [37] where three functional substrates were used (one for Ku-band RA, one for Ka-band RA, and one for the FSS in the middle). Miniaturized K-band cells together with Ka-band cells are interleaved in the same aperture for dual-band operation, while BP and DP are simultaneously utilized to acquire the independent dual-CP beamforming at both bands.…”

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confidence: 99%

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Dual-Wideband Dual-Circularly-Polarized Shared-Aperture Reflectarrays With a Single Functional Substrate for K-/Ka-Band Applications

Tong

Jiang

et al. 2022

IEEE Trans. Antennas Propagat.

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We report here the design and experiments of dualwideband dual-circularly-polarized (dual-CP) shared-aperture reflectarrays (RAs) operating at K-/Ka-band utilizing a single functional substrate. By coupling the adjacent but separated resonances of H-shaped aperture and circular patch and utilizing the shorted microstrip phase delay lines, the proposed RA cells can offer wideband performance. Then, these RA cells are interleaved in a shared aperture for dual-band operation. By combining the dynamic phase and Berry phase compensation techniques, the RA cells can independently control the reflective phase delay of orthogonal CP beams at both of the targeted bands, providing four degrees of freedom for beamforming. The diffractive property of an infinite periodic gradient array of the interleaved K-and Kaband cells is investigated, which verifies the wideband performance of the proposed cells. Two RAs with a thin panel thickness of 0.27 λK (λK is the free-space wavelength at K-band) are fabricated and characterized, generating symmetrically-and asymmetrically-distributed dual-wideband dual-CP beams at K-/Ka-band, respectively. The measured bandwidths for the two RAs are wider than 14.1% for K-band right-/left-handed CP beams and about 11% for Ka-band right-/left-handed CP beams with both the gain variation and axial ratio smaller than 2 dB.

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Radar Antennas

Li,

Xu,

Han

et al. 2024

Encyclopedia of RF and Microwave Engineering

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The radar antenna plays an important role in the radar system, and the requirement of radar antenna performances and functions is varied with different radar types. The radar antenna forms a highly directive beam in both transmit and receive modes, which achieve accurate angular targets and resolve closely located targets, and this important feature of the radar antennas can be quantitatively expressed in terms of the beamwidth, gain, and sidelobes. Besides, the functions of radar antennas can be classified into beam scanning (search or surveillance target) and target tracking. In the increasingly complex electromagnetic (EM) world, digital coding and programmable metamaterials and metasurfaces have been enabling commercial opportunities with a broad impact on radars and wireless communications. Because the subject of radar antennas is very extensive, in this chapter, only selected types and performances of radar antennas are discussed and then four different antennas (reflector antennas, phased‐array antennas, space‐fed arrays, and metamaterial antennas) are summarized.

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Dual-Circularly Polarized Spin-Decoupled Reflectarray With FSS-Back for Independent Operating at Ku-/Ka-Bands

Cited by 34 publications

References 13 publications

Dual polarized reflectarray antenna for operation in X and Ku bands

Dual polarized reflectarray antenna for operation in X and Ku bands

Dual-Wideband Dual-Circularly-Polarized Shared-Aperture Reflectarrays With a Single Functional Substrate for K-/Ka-Band Applications

Radar Antennas

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