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Title
Abstract
FAQs
Figures
Introduction
Proposed Antenna Design
Simulated Result of Proposed Antenna
Conclusion
References

Design of metamaterial antenna for wireless applications

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Abstract

A multiband compact planar antenna was designed with frequency notched function, the antenna with CPW fed is consist of various microstrip resonators, such as closed ring resonator and SRR, producing some discontinuous resonant bands is suggested. Metamaterial is artificial material that may exhibit electromagnetic (EM) responses not readily found in natural. Presently, it has gained considerable attention since its unique EM characteristics can be advantageous in design of novel EM components and devices. It may be used for making perfect lens or even invisibility cloaks. other examples are that electromagnetic band gap/photonic band gap (EBG/PBG) and artificial magnetic metamaterial have already been used in antennas design, which might be used to open the door to obtain the compact and high performance EM components and devices. Using Agilent Technologies ADS Software, the antenna is designed and simulated for 2.1/3.5/5GHZ UMTS/worldwide interoperability for microwave access (WiMAX)/Wireless LAN (WLAN) application with return loss of more than -10dB. To achieve a very wide bandwidth the rectangular ground planes and the split-ring loops dimensions are tuned. to improve the return loss performance in the required band a tapered transmission line is adopted. Measurement results shows that the proposed UWB antennas have a wide bandwidth from 3.1 to 10.6 GHz. To achieve a very wide bandwidth the rectangular ground planes and the split-ring loops dimensions are tuned.

FAQs

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AI

What specific improvements do metamaterial substrates bring to antenna design?add

The research demonstrates that metamaterial substrates enhance antenna efficiency by preventing unwanted radiation and achieving a return loss greater than -10 dB with a bandwidth expansion from 3.1 to 10.6 GHz.

How does the proposed antenna perform across multiple frequency bands?add

The designed multiband compact planar antenna operates effectively at 2.1, 3.5, and 5 GHz, demonstrating satisfactory resonance for mobile device applications.

What is the significance of the closed ring resonator and SRR in this design?add

Closed ring resonators and split ring resonators (SRR) are integral to producing multiple resonant frequency bands, supporting frequencies suitable for UMTS, WiMAX, and WLAN applications.

What design parameters were crucial for the proposed antenna's performance?add

Key parameters include a radius of r1 = 4.1 mm and r2 = 7.75 mm, with specific height and width settings to optimize impedance matching and bandwidth.

How does the antenna's fabrication ease influence its practical applications?add

The proposed antenna is designed to be inexpensive and easy to manufacture, making it particularly suitable for deployment in various multiband mobile devices.

Figures (10)
Fig. 1: Split ring resonator (SRR) In the multiband coplanar antenna CPW fed is used and it consist of closed ring resonator and split ring resonator(SRR). SRR is common to metamaterials. In various types of metamaterials up to 200 terahertz they produce magnetic response[9]. A single cell SRR at opposite end has a pair of enclosed loops with splits. the loops have a small gap and made up of non-magnetic metal like copper[10]. The loops are gapped and square field pattern obtained is dipolar. Splits in the ring support wavelength than diameter.in closed rings it would not happen[11]. Large capacitance is produced by the small gaps between the rings. This produces low radiative loss! 12].
Fig. 1: Split ring resonator (SRR) In the multiband coplanar antenna CPW fed is used and it consist of closed ring resonator and split ring resonator(SRR). SRR is common to metamaterials. In various types of metamaterials up to 200 terahertz they produce magnetic response[9]. A single cell SRR at opposite end has a pair of enclosed loops with splits. the loops have a small gap and made up of non-magnetic metal like copper[10]. The loops are gapped and square field pattern obtained is dipolar. Splits in the ring support wavelength than diameter.in closed rings it would not happen[11]. Large capacitance is produced by the small gaps between the rings. This produces low radiative loss! 12].
III. SIMULATED RESULT OF PROPOSED ANTENNA The proposed antenna was designed at (2.1/3.5/5)GHZ and simulated by using ADS software. Following the above desic procedure of the proposed antenna a satisfactory result is obtained. A multiband compact planar antenna is designed for 2.1/3.5/5GHz and simulated. The proper parameters for the proposed antenna configuration were: rl = 4.1 mm, r2 = 7.75 mm, t = 0.5 mm, w = 1.6 mm, s = 1 mm, h= 0.5 mm, of = 1.5 mm, g = 0.5mm, a = 10.432 mm, b = 8.6 mm, H =1.6 mm. The CPW feed line proposed in this antenna is indicated in fig 2 and proposed antenna design with ground plane is becdoandkeasl tin Pte. BD
III. SIMULATED RESULT OF PROPOSED ANTENNA The proposed antenna was designed at (2.1/3.5/5)GHZ and simulated by using ADS software. Following the above desic procedure of the proposed antenna a satisfactory result is obtained. A multiband compact planar antenna is designed for 2.1/3.5/5GHz and simulated. The proper parameters for the proposed antenna configuration were: rl = 4.1 mm, r2 = 7.75 mm, t = 0.5 mm, w = 1.6 mm, s = 1 mm, h= 0.5 mm, of = 1.5 mm, g = 0.5mm, a = 10.432 mm, b = 8.6 mm, H =1.6 mm. The CPW feed line proposed in this antenna is indicated in fig 2 and proposed antenna design with ground plane is becdoandkeasl tin Pte. BD
Fig. 4: Comparison of simulated and Measured Return loss in dB (1 to 6 GHz)
Fig. 4: Comparison of simulated and Measured Return loss in dB (1 to 6 GHz)
Fig. 5: Comparison of simulated and Measured Return loss in dB (1 to 11 GHz)
Fig. 5: Comparison of simulated and Measured Return loss in dB (1 to 11 GHz)
Fig. 7: Current Distribution of Rectangular ground structure antenna Fig. 6: Proposed fabricated antenna
Fig. 7: Current Distribution of Rectangular ground structure antenna Fig. 6: Proposed fabricated antenna
The return loss obtained by the proposed antenna is-18db at 2.1 GHz, -22db at 3.5 GHz and -12db at 5GHz is indicated in fig 4. From Fig 4and 5 fabricated antennas shows better result but deviation in frequency of resonance designed.
The return loss obtained by the proposed antenna is-18db at 2.1 GHz, -22db at 3.5 GHz and -12db at 5GHz is indicated in fig 4. From Fig 4and 5 fabricated antennas shows better result but deviation in frequency of resonance designed.
Fig. 9: Comparison of proposed antenna with reference antenna in Return loss in dB
Fig. 9: Comparison of proposed antenna with reference antenna in Return loss in dB
Fig. 10: Gain and Directivity of the proposed antenna The 2-D radiation patterns shows as in Fig 11, and Fig 12 that the proposed antenna has high directivity, gain and efficiency.
Fig. 10: Gain and Directivity of the proposed antenna The 2-D radiation patterns shows as in Fig 11, and Fig 12 that the proposed antenna has high directivity, gain and efficiency.
A new compact and planar multiband antenna with composite micro strip met material resonators has been presented. The antenna is suitable for multi-band mobile devices and offers advantages in small size, planar, inexpensive and ease tc manufacture, sample antenna with frequency notched function is proposed for trainband WiMAX wireless communications applications. By using composite closed-ring resonator and SRR to produce three discontinue resonant frequency bands; the antenna is suitable for UMTS, WiMAX and WLAN (2.1/3.5/5GHz) wireless communication. To improve impedance bandwidth and impedance matching, the antenna is fed by 50Q CPW with tapered impedance transformer line. REFERENCES
A new compact and planar multiband antenna with composite micro strip met material resonators has been presented. The antenna is suitable for multi-band mobile devices and offers advantages in small size, planar, inexpensive and ease tc manufacture, sample antenna with frequency notched function is proposed for trainband WiMAX wireless communications applications. By using composite closed-ring resonator and SRR to produce three discontinue resonant frequency bands; the antenna is suitable for UMTS, WiMAX and WLAN (2.1/3.5/5GHz) wireless communication. To improve impedance bandwidth and impedance matching, the antenna is fed by 50Q CPW with tapered impedance transformer line. REFERENCES

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