Limits...
Low-cost dielectric substrate for designing low profile multiband monopole microstrip antenna.

Ahsan MR, Islam MT, Habib Ullah M, Arshad H, Mansor MF - ScientificWorldJournal (2014)

Bottom Line: This paper proposes a small sized, low-cost multiband monopole antenna which can cover the WiMAX bands and C-band.The proposed antenna of 20 × 20 mm(2) radiating patch is printed on cost effective 1.6 mm thick fiberglass polymer resin dielectric material substrate and fed by 4 mm long microstrip line.The experimental results show that the prototype of the antenna has achieved operating bandwidths (voltage stand wave ratio (VSWR) less than 2) 360 MHz (2.53-2.89 GHz) and 440 MHz (3.47-3.91 GHz) for WiMAX and 1550 MHz (6.28-7.83 GHz) for C-band.

View Article: PubMed Central - PubMed

Affiliation: Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia.

ABSTRACT
This paper proposes a small sized, low-cost multiband monopole antenna which can cover the WiMAX bands and C-band. The proposed antenna of 20 × 20 mm(2) radiating patch is printed on cost effective 1.6 mm thick fiberglass polymer resin dielectric material substrate and fed by 4 mm long microstrip line. The finite element method based, full wave electromagnetic simulator HFSS is efficiently utilized for designing and analyzing the proposed antenna and the antenna parameters are measured in a standard far-field anechoic chamber. The experimental results show that the prototype of the antenna has achieved operating bandwidths (voltage stand wave ratio (VSWR) less than 2) 360 MHz (2.53-2.89 GHz) and 440 MHz (3.47-3.91 GHz) for WiMAX and 1550 MHz (6.28-7.83 GHz) for C-band. The simulated and measured results for VSWR, radiation patterns, and gain are well matched. Nearly omnidirectional radiation patterns are achieved and the peak gains are of 3.62 dBi, 3.67 dBi, and 5.7 dBi at 2.66 GHz, 3.65 GHz, and 6.58 GHz, respectively.

Show MeSH
Smith chart of the proposed antenna.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4127211&req=5

fig11: Smith chart of the proposed antenna.

Mentions: Figure 10 illustrates the simulated surface current distribution of the radiating patch element of the proposed antenna at 2.66, 3.65, and 6.58 GHz resonant frequencies, respectively. It has been revealed through observation that the distribution of current is much stronger in upper band resonant frequencies than the lower band resonant frequencies which in turn validate gain. In a normalized scale, the voltage standing wave ratio (VSWR) and input impedance at operating frequency bands for the designed antenna are evaluated in Smith chart. Using normalization impedance of 50Ω, it is plotted on 2D complex reflection coefficient plane as shown in Figure 11. From the observation, it is found that three resonance frequencies of the antenna are inside the 2:1 VSWR circle. It is found that the input impedance curve has multiple twisted and overlapping circles at the center of the Smith chart which validate the multiband characteristics. Alongside, the tabular data are presented where Rx values are for the input impedance whereas the marked points m1, m2, and m3 indicate three resonant frequencies of the antenna.


Low-cost dielectric substrate for designing low profile multiband monopole microstrip antenna.

Ahsan MR, Islam MT, Habib Ullah M, Arshad H, Mansor MF - ScientificWorldJournal (2014)

Smith chart of the proposed antenna.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4127211&req=5

fig11: Smith chart of the proposed antenna.
Mentions: Figure 10 illustrates the simulated surface current distribution of the radiating patch element of the proposed antenna at 2.66, 3.65, and 6.58 GHz resonant frequencies, respectively. It has been revealed through observation that the distribution of current is much stronger in upper band resonant frequencies than the lower band resonant frequencies which in turn validate gain. In a normalized scale, the voltage standing wave ratio (VSWR) and input impedance at operating frequency bands for the designed antenna are evaluated in Smith chart. Using normalization impedance of 50Ω, it is plotted on 2D complex reflection coefficient plane as shown in Figure 11. From the observation, it is found that three resonance frequencies of the antenna are inside the 2:1 VSWR circle. It is found that the input impedance curve has multiple twisted and overlapping circles at the center of the Smith chart which validate the multiband characteristics. Alongside, the tabular data are presented where Rx values are for the input impedance whereas the marked points m1, m2, and m3 indicate three resonant frequencies of the antenna.

Bottom Line: This paper proposes a small sized, low-cost multiband monopole antenna which can cover the WiMAX bands and C-band.The proposed antenna of 20 × 20 mm(2) radiating patch is printed on cost effective 1.6 mm thick fiberglass polymer resin dielectric material substrate and fed by 4 mm long microstrip line.The experimental results show that the prototype of the antenna has achieved operating bandwidths (voltage stand wave ratio (VSWR) less than 2) 360 MHz (2.53-2.89 GHz) and 440 MHz (3.47-3.91 GHz) for WiMAX and 1550 MHz (6.28-7.83 GHz) for C-band.

View Article: PubMed Central - PubMed

Affiliation: Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia.

ABSTRACT
This paper proposes a small sized, low-cost multiband monopole antenna which can cover the WiMAX bands and C-band. The proposed antenna of 20 × 20 mm(2) radiating patch is printed on cost effective 1.6 mm thick fiberglass polymer resin dielectric material substrate and fed by 4 mm long microstrip line. The finite element method based, full wave electromagnetic simulator HFSS is efficiently utilized for designing and analyzing the proposed antenna and the antenna parameters are measured in a standard far-field anechoic chamber. The experimental results show that the prototype of the antenna has achieved operating bandwidths (voltage stand wave ratio (VSWR) less than 2) 360 MHz (2.53-2.89 GHz) and 440 MHz (3.47-3.91 GHz) for WiMAX and 1550 MHz (6.28-7.83 GHz) for C-band. The simulated and measured results for VSWR, radiation patterns, and gain are well matched. Nearly omnidirectional radiation patterns are achieved and the peak gains are of 3.62 dBi, 3.67 dBi, and 5.7 dBi at 2.66 GHz, 3.65 GHz, and 6.58 GHz, respectively.

Show MeSH