Broadband Compact Horn Antennas by Using EPS-ENZ Metamaterial Lens

Ramaccia, Davide; Scattone, Francesco; Bilotti, Filiberto; Toscano, Alessandro

doi:10.1109/tap.2013.2250235

Cited by 104 publications

(49 citation statements)

References 34 publications

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“…Using gradient-index or zero-index metamaterials, three-dimensional anisotropic lenses have been designed and experimentally demonstrated in [6,7]. Composed of conventional and epsilon near-zero materials, a flat lens has been proposed to shorten the length of a horn antenna without decreasing its directivity in a broad frequency range [8]. Moreover, the electromagnetic bandgap (EBG) structures as a superstrate can filter the undesired radiation for a class of patch antennas [9].…”

Section: Introductionmentioning

confidence: 99%

Meander-Line Based Broadband Artificial Material for Enhancing the Gain of Printed End-Fire Antenna

Chen¹,

Lei²,

Shi³

2015

PIER

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Abstract-A broadband artificial material based on meander-line (ML) structures is proposed for enhancing the gain of printed end-fire antennas. The ML based material with an effective index of refraction greater than 1 behaves as a dielectric lens in improving the directivity of an end-fire antenna. The electric field intensity distribution can be changed by the material, resulting in a more directional emission. Simulated results indicate extending the length or width of the material can lead to more significant gain enhancement without destroying the impedance bandwidth of the antenna. Three printed end-fire antennas with and without material loading are fabricated and measured. The measurements show that end-fire antennas loaded with two and four rows of ML structures can obtain gain increments of 0.6-3.6 dB and 1.2-5.7 dB, respectively, and that the radiation patterns are narrowed in both E-and H-planes over the whole operating band (6-11.5 GHz).

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Section: Introductionmentioning

confidence: 99%

Meander-Line Based Broadband Artificial Material for Enhancing the Gain of Printed End-Fire Antenna

Chen¹,

Lei²,

Shi³

2015

PIER

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“…Artificial electromagnetic materials, metamaterials, and metasurfaces have revolutionized the design of microwave and optical components, allowing to obtain better performances with respect to conventional solutions [1][2][3][4][5][6][7][8] or novel functionalities [9][10][11][12][13][14]. In particular, in the last years, there was a strong interest in the use of metamaterials for performing the manipulation of the electromagnetic waves.…”

Section: Introductionmentioning

confidence: 99%

Signal manipulation through horn antennas loaded with metamaterial-inspired particles: A review

Barbuto

Ramaccia

Trotta

et al. 2015

EPJ Applied Metamaterials

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-This review paper summarizes our latest results on designing metamaterial-inspired particles that can be inserted inside horn antennas to provide signal manipulation capabilities to the overall system. Metamaterial-inspired band-pass filtering modules, based on the use of either bi-omega particles or complementary electrically small resonators, are firstly presented. The bi-omega particle enables the antenna to perform filtering operations on the received signal to radiate/receive only the narrowband signal of interest, improving, thus, the signal-to-noise ratio. The second module, besides filtering the unwanted signals out, allows converting the linearly polarized mode of the feeding waveguide into a circular polarized field in the horn, and vice-versa. Moreover, some band-stop filters, based on the employment of single or coupled metamaterial-inspired resonators, are presented. All these components are of extremely compact size and, therefore, can be easily realized with standard PCB technology and added to standard horn antennas to increase their functionalities.

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“…A stratified soil, such as an highway road pavement, an archeological area, a geological stack of sedimentary rocks, are constituted by a layered deposition of different materials and, thus, can be studied as a microwave circuit consisting of a cascade of different transmission line segments [13][14][15][16][17][18][19][20]. The analogies between the realistic scenario of a stratified medium and the microwave circuit open the doors to an innovative way to analyze the GPR signal, returning a complete description of the propagation effect of the GPR electromagnetic pulse in presence of a generic scenario.…”

Section: Introductionmentioning

confidence: 99%

Permittivity of Sub-Soil Materials Retrieved Through Transmission Line Model and GPR Data

Guattari¹,

Ramaccia²,

Bilotti³

et al. 2015

PIER

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Abstract-In this paper, we propose a new retrieval technique to estimate the dielectric permittivity of the sub-soil materials of a stratified structure. The core of the retrieval procedure is a proper electromagnetic circuit model representing the realistic stratified media as a cascade of transmission line segments. Exploiting the analogies between the electrical parameters of the transmission line segments and the constitutive parameters of the materials of the multilayer structure, the propagation of the Ground Penetrating Radar (GPR) signal is equivalently represented as a pair of voltage and current waves propagating in the transmission line network. The effectiveness of the proposed retrieval technique is confirmed by proper experimental results. In particular, the retrieved electromagnetic parameters of the sub-soil materials are found to be consistent with the ones obtained by a direct characterization of the same materials. These results suggest that the proposed method can be successfully applied to the material characterization able to monitor several macroscopic properties of sub-soil materials.

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Broadband Compact Horn Antennas by Using EPS-ENZ Metamaterial Lens

Cited by 104 publications

References 34 publications

Meander-Line Based Broadband Artificial Material for Enhancing the Gain of Printed End-Fire Antenna

Meander-Line Based Broadband Artificial Material for Enhancing the Gain of Printed End-Fire Antenna

Signal manipulation through horn antennas loaded with metamaterial-inspired particles: A review

Permittivity of Sub-Soil Materials Retrieved Through Transmission Line Model and GPR Data

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