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Metasurface Reflector (MSR) Loading for High Performance Small Microstrip Antenna Design.

Ahsan MR, Islam MT, Ullah MH, Singh MJ, Ali MT - PLoS ONE (2015)

Bottom Line: The details of the design progress through numerical simulations and experimental results are presented and discussed accordingly.The investigation shows that utilization of MSR structure has significantly broadened the -10 dB impedance bandwidth than the conventional patch antenna: from 540 to 632 MHz (17%), 467 to 606 MHz (29%) and 758 MHz to 1062 MHz (40%) for three distinct operating bands centered at 0.9, 3.5 and 5.5 GHz.Additionally, due to the assimilation of MSR, the overall realized gains have been upgraded to a higher value of 3.62 dBi, 6.09 dBi and 8.6 dBi for lower, middle and upper frequency band respectively.

View Article: PubMed Central - PubMed

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

ABSTRACT
A meander stripline feed multiband microstrip antenna loaded with metasurface reflector (MSR) structure has been designed, analyzed and constructed that offers the wireless communication services for UHF/microwave RFID and WLAN/WiMAX applications. The proposed MSR assimilated antenna comprises planar straight forward design of circular shaped radiator with horizontal slots on it and 2D metasurface formed by the periodic square metallic element that resembles the behavior of metamaterials. A custom made high dielectric bio-plastic substrate (εr = 15) is used for fabricating the prototype of the MSR embedded planar monopole antenna. The details of the design progress through numerical simulations and experimental results are presented and discussed accordingly. The measured impedance bandwidth, radiation patterns and gain of the proposed MSR integrated antenna are compared with the obtained results from numerical simulation, and a good compliance can be observed between them. The investigation shows that utilization of MSR structure has significantly broadened the -10 dB impedance bandwidth than the conventional patch antenna: from 540 to 632 MHz (17%), 467 to 606 MHz (29%) and 758 MHz to 1062 MHz (40%) for three distinct operating bands centered at 0.9, 3.5 and 5.5 GHz. Additionally, due to the assimilation of MSR, the overall realized gains have been upgraded to a higher value of 3.62 dBi, 6.09 dBi and 8.6 dBi for lower, middle and upper frequency band respectively. The measured radiation patterns, impedance bandwidths (S11<-10 dB) and gains from the MSR loaded antenna prototype exhibit reasonable characteristics that can satisfy the requirements of UHF/microwave (5.8 GHz) RFID, WiMAX (3.5/5.5 GHz) and WLAN (5.2/5.8 GHz) applications.

No MeSH data available.


Effect of inserting different numbers of slots on the radiating patch.
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pone.0127185.g002: Effect of inserting different numbers of slots on the radiating patch.

Mentions: For the design of the proposed antenna, one of the considerations is multi-resonant functionality which is achieved through slot loading on the patch. The idea of slot antenna first proposed by Alan Blumlein and its functionality is based on the Babinet’s principle [36,37]. The technique of cutting slots on the radiating patch is effectively utilized to reduce the size of the patch antenna and create multiple frequency band within the desired frequency range by wisely selecting the dimension and position of the slot [31–35]. The horizontal slots on the radiating surface enable variation in current flow and direction which in turn changes the impedance of the patch to produce a desired resonant mode. The simulated frequency response of the scattering parameter (S-parameter), S11 of the antenna for the insertions of slots is shown in Fig 2. Insertion of two middle slots (Ws3, Ws4) which are mirrored along the center of the radiating patch introduces the lower resonance frequency centered at 1.58 GHz. Etching out the other two horizontal slots (Ws2, Ws5) symmetric along the center are accountable for generating second resonant frequency at around 3.74 GHz while forcing the lower resonance towards the lower band as expected. Inclusion of the outer slots (Ws1, Ws6) significantly affect the surface current distribution on the radiating element and thus help the patch antenna to resonate at three distinct frequencies centered at 1.04 GHz, 3.6 GHz and 5.4 GHz. The arrangement and mirrored placement of the slots effectively extend the streamlines of the current associated with the fundamental mode of resonances and results in lower down the resonant frequencies in comparison to the antenna without any slot.


Metasurface Reflector (MSR) Loading for High Performance Small Microstrip Antenna Design.

Ahsan MR, Islam MT, Ullah MH, Singh MJ, Ali MT - PLoS ONE (2015)

Effect of inserting different numbers of slots on the radiating patch.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4446261&req=5

pone.0127185.g002: Effect of inserting different numbers of slots on the radiating patch.
Mentions: For the design of the proposed antenna, one of the considerations is multi-resonant functionality which is achieved through slot loading on the patch. The idea of slot antenna first proposed by Alan Blumlein and its functionality is based on the Babinet’s principle [36,37]. The technique of cutting slots on the radiating patch is effectively utilized to reduce the size of the patch antenna and create multiple frequency band within the desired frequency range by wisely selecting the dimension and position of the slot [31–35]. The horizontal slots on the radiating surface enable variation in current flow and direction which in turn changes the impedance of the patch to produce a desired resonant mode. The simulated frequency response of the scattering parameter (S-parameter), S11 of the antenna for the insertions of slots is shown in Fig 2. Insertion of two middle slots (Ws3, Ws4) which are mirrored along the center of the radiating patch introduces the lower resonance frequency centered at 1.58 GHz. Etching out the other two horizontal slots (Ws2, Ws5) symmetric along the center are accountable for generating second resonant frequency at around 3.74 GHz while forcing the lower resonance towards the lower band as expected. Inclusion of the outer slots (Ws1, Ws6) significantly affect the surface current distribution on the radiating element and thus help the patch antenna to resonate at three distinct frequencies centered at 1.04 GHz, 3.6 GHz and 5.4 GHz. The arrangement and mirrored placement of the slots effectively extend the streamlines of the current associated with the fundamental mode of resonances and results in lower down the resonant frequencies in comparison to the antenna without any slot.

Bottom Line: The details of the design progress through numerical simulations and experimental results are presented and discussed accordingly.The investigation shows that utilization of MSR structure has significantly broadened the -10 dB impedance bandwidth than the conventional patch antenna: from 540 to 632 MHz (17%), 467 to 606 MHz (29%) and 758 MHz to 1062 MHz (40%) for three distinct operating bands centered at 0.9, 3.5 and 5.5 GHz.Additionally, due to the assimilation of MSR, the overall realized gains have been upgraded to a higher value of 3.62 dBi, 6.09 dBi and 8.6 dBi for lower, middle and upper frequency band respectively.

View Article: PubMed Central - PubMed

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

ABSTRACT
A meander stripline feed multiband microstrip antenna loaded with metasurface reflector (MSR) structure has been designed, analyzed and constructed that offers the wireless communication services for UHF/microwave RFID and WLAN/WiMAX applications. The proposed MSR assimilated antenna comprises planar straight forward design of circular shaped radiator with horizontal slots on it and 2D metasurface formed by the periodic square metallic element that resembles the behavior of metamaterials. A custom made high dielectric bio-plastic substrate (εr = 15) is used for fabricating the prototype of the MSR embedded planar monopole antenna. The details of the design progress through numerical simulations and experimental results are presented and discussed accordingly. The measured impedance bandwidth, radiation patterns and gain of the proposed MSR integrated antenna are compared with the obtained results from numerical simulation, and a good compliance can be observed between them. The investigation shows that utilization of MSR structure has significantly broadened the -10 dB impedance bandwidth than the conventional patch antenna: from 540 to 632 MHz (17%), 467 to 606 MHz (29%) and 758 MHz to 1062 MHz (40%) for three distinct operating bands centered at 0.9, 3.5 and 5.5 GHz. Additionally, due to the assimilation of MSR, the overall realized gains have been upgraded to a higher value of 3.62 dBi, 6.09 dBi and 8.6 dBi for lower, middle and upper frequency band respectively. The measured radiation patterns, impedance bandwidths (S11<-10 dB) and gains from the MSR loaded antenna prototype exhibit reasonable characteristics that can satisfy the requirements of UHF/microwave (5.8 GHz) RFID, WiMAX (3.5/5.5 GHz) and WLAN (5.2/5.8 GHz) applications.

No MeSH data available.