Using EBG to improve antenna efficiency in proximity to the human body

Duan, Z.; Linton, D.; Scanlon, William; Conway, Gareth A.

doi:10.1049/ic:20080094

Cited by 7 publications

(2 citation statements)

References 9 publications

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“…HIS design by Sievenpiper is shown below in Figure 1 Planar structures give in-phase reflection and suppress surface propagation in a particular frequency band. Additionally, the antenna currents are in-phase with the image currents, therefore both constructively interfere and provide better antenna performance [35]. By suppressing surface waves, these assemblies are very co-operative just in case of planer antennas resulting in directivity, efficiency of the antenna and achieving high gain [36][37].…”

Section: High Impedance Surfacementioning

confidence: 99%

L Shaped via based Mushroom type High Impedance Structure

Ahmad¹

2019

IJEW

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High-impedance Electromagnetic Band-Gap structures (EBG) surfaces have the capability to forbid flow of EM waves in a given band which and therefore surface waves in case of planar antennas like mictostrip antenna can be minimized with this characteristics of EBG plane. Shape, size, symmetry, and material used in their construction defines their operating band. In this research, a novel compact EBG structure also called high impedance structure (HIS) is proposed. The design is achieved through incorporation of 'L' shaped via to conventional mushroom type EBG/HIS instead of straight vias. The design includes distribution of square patches over substrate material below which there exists a ground plane. Vias passing through the substrate connecting square patches and the ground plane are also part of its design It has been observed that operating frequency of L shaped via based EBG is much lower than that of conventional mushroom type EBG/HIS having straight vias. Alternatively, we can say that size reduction has been achieved through incorporation of L shaped via to the EBG/HIS resulting in 62.5 % of size reduction. All the designs and simulations are carried out in CST microwave studio.

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Section: High Impedance Surfacementioning

confidence: 99%

L Shaped via based Mushroom type High Impedance Structure

Ahmad¹

2019

IJEW

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“…These structures create a zone of high impedance on the surface of the substrate, which greatly attenuates surface propagation modes. This property can be used into the antenna to enhance the efficiency and obtain an improvement in other parameters.…”

Section: Proposed Designmentioning

confidence: 99%

Three‐layered circular patch antennas array with UC‐PBG for wider bandwidth and surface wave propagation mode attenuation at X‐band

Jiménez-Guzmán

Tirado‐Méndez

Jardón‐Aguilar

2018

Micro & Optical Tech Letters

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In this work, a three‐layered antenna array complemented with Uniplanar Compact Photonic‐Bandgap (UP‐PBG) structure is presented, for applications in the X‐band. The proposed array consists of circular patch radiator operating at 10 GHz, where the element is surrounded by UC‐PBG unit cells in order to improve the performance of the antenna. By combining the radiator and the UC‐PBG cells, the directivity, gain and polarization are kept, while the parasitic lobes are reduced 50% their magnitude. The bandwidth augments 44% compared to a conventional array, and a diminution of the surface propagation mode is obtained, increasing the radiation efficiency.

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