Abstract:A copper strip and conductive paint-based low profile stripped helical antenna for circular polarization over wide axial-ratio (AR) bandwidth are presented. Impacts of strip widths and geometric parameters of the helix on antenna performance (impedance bandwidth, reflection coefficient, AR, gain) are analyzed thoroughly. In terms of performance parameters, the proposed design is also compared with traditional designs of wire and strip-based helical antennas. Proper impedance matching in the proposed design is … Show more
“…To achieve high gain and broad AR BW, arrays of MA's are designed with feeding networks and reported in Asrin et al [11][12][13] An overview of additive manufacturing and various antenna construction by utilizing this technique has been shown in Helena et al [14][15][16] Successful uses of polylactic acid (PLA) material and 3D printing for a strip-based helical antenna are reported in Ghosh and Harackiewicz. 17 The work presented here is focused on a single-arm strip-based semiellipsoidal helical antenna with details fabrication and measurements. In our work, first, the wire-based SEHA was analyzed by varying the scaling factors in the axial direction for observing the circular polarization over a 3-dB AR BW.…”
Section: Introductionmentioning
confidence: 99%
“…Besides 3D helical antenna, microstrip antennas (MA) are also used for producing circular polarization but it produces less gain. To achieve high gain and broad AR BW, arrays of MA's are designed with feeding networks and reported in Asrin et al 11–13 An overview of additive manufacturing and various antenna construction by utilizing this technique has been shown in Helena et al 14–16 Successful uses of polylactic acid (PLA) material and 3D printing for a strip‐based helical antenna are reported in Ghosh and Harackiewicz 17 …”
A semiellipsoidal helical antenna (SEHA) is formed by scaling a hemispherical antenna in the axial direction. Effects of scaling factors on reflection coefficient (S11), axial ratio bandwidth (AR BW), and gains were analyzed thoroughly. By considering the best scaling factor, analysis is continued for strip‐based SEHA. It is observed that keeping the strip face parallel to the ground plane eliminates the concern of extra impedance matching issues and improves the overall performance over its wire‐based counterpart. For prototyping, the antenna is constructed independently on polylactic acid and acrylonitrile butadiene styrene plastic‐based supportive structures. Simulated and measured results are well agreed upon. When the height (h) in the axial direction is twice the hemispherical radius (r), the antenna provided maximum impedance and 3‐dB AR bandwidths of 144% and 77.53%, respectively, with a maximum gain of 8.83 dBi. The proposed antenna would be a good contestant in satellite communication where a broadband circularly polarized antenna is required.
“…To achieve high gain and broad AR BW, arrays of MA's are designed with feeding networks and reported in Asrin et al [11][12][13] An overview of additive manufacturing and various antenna construction by utilizing this technique has been shown in Helena et al [14][15][16] Successful uses of polylactic acid (PLA) material and 3D printing for a strip-based helical antenna are reported in Ghosh and Harackiewicz. 17 The work presented here is focused on a single-arm strip-based semiellipsoidal helical antenna with details fabrication and measurements. In our work, first, the wire-based SEHA was analyzed by varying the scaling factors in the axial direction for observing the circular polarization over a 3-dB AR BW.…”
Section: Introductionmentioning
confidence: 99%
“…Besides 3D helical antenna, microstrip antennas (MA) are also used for producing circular polarization but it produces less gain. To achieve high gain and broad AR BW, arrays of MA's are designed with feeding networks and reported in Asrin et al 11–13 An overview of additive manufacturing and various antenna construction by utilizing this technique has been shown in Helena et al 14–16 Successful uses of polylactic acid (PLA) material and 3D printing for a strip‐based helical antenna are reported in Ghosh and Harackiewicz 17 …”
A semiellipsoidal helical antenna (SEHA) is formed by scaling a hemispherical antenna in the axial direction. Effects of scaling factors on reflection coefficient (S11), axial ratio bandwidth (AR BW), and gains were analyzed thoroughly. By considering the best scaling factor, analysis is continued for strip‐based SEHA. It is observed that keeping the strip face parallel to the ground plane eliminates the concern of extra impedance matching issues and improves the overall performance over its wire‐based counterpart. For prototyping, the antenna is constructed independently on polylactic acid and acrylonitrile butadiene styrene plastic‐based supportive structures. Simulated and measured results are well agreed upon. When the height (h) in the axial direction is twice the hemispherical radius (r), the antenna provided maximum impedance and 3‐dB AR bandwidths of 144% and 77.53%, respectively, with a maximum gain of 8.83 dBi. The proposed antenna would be a good contestant in satellite communication where a broadband circularly polarized antenna is required.
“…Works have also been done to fabricate complexshaped helix antennas using 3D printing and conductive paint. [14][15][16] In this work, the ESA design is scaled up at a frequency of 1.85 GHz for assessing the applicability of additive manufacturing in small and complex-shaped structure. Moreover, conductive strip-based folded ESA with constant strip widths, and conformal placement is new compared with its wire counterpart which provided more flexibility of choosing conductor materials.…”
Section: Introductionmentioning
confidence: 99%
“…A rapid prototype of a wire‐type ESA was fabricated by Kim et al 13 The author used a successive polycrystalline copper coating on a 3D‐printed dielectric structure using a selective laser sintering (SLS) technique. Works have also been done to fabricate complex‐shaped helix antennas using 3D printing and conductive paint 14–16 …”
A hemispherical‐shaped folded electrically small antenna (ESA) is a well‐known antenna where the radiating conductor is a wire or flat strip of variable width. This work analyzed the performance of strip‐based ESA for a constant strip width and focused on the fabrication procedure which utilizes the low‐cost dielectric material and ubiquitous 3‐D printer. The impact of additional dielectric support on the performance of ESA was investigated. This work also introduced conductive paint for the radiating part, along with metallic wire and strip. There is a good agreement between simulated and measured results. The 3‐D printing technique offers design flexibility, eases fabrication difficulty, reduces material cost, and improves the mechanical stability of the antenna.
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