scholarly journals DESIGN OF A COMPACT ULTRAWIDEBAND METAMATERIAL ANTENNA BASED ON THE MODIFIED SPLIT-RING RESONATOR AND CAPACITIVELY LOADED STRIPS UNIT CELL

2013 ◽  
Vol 136 ◽  
pp. 157-173 ◽  
Author(s):  
Mimi Aminah Wan Nordin ◽  
Mohammad Tariqul Islam ◽  
Norbahiah Misran
Keyword(s):  
Ring Resonator ◽  
Split Ring Resonator ◽  
Unit Cell ◽  
Split Ring ◽  
Metamaterial Antenna

scholarly journals A MINIATURIZATION OF MICROSTRIP ANTENNA USING NEGATIVE PERMITIVITY METAMATERIAL BASED ON CSRR-LOADED GROUNDFOR WLAN APPLICATIONS

2016 ◽  
Vol 54 (6) ◽  
pp. 689 ◽  
Author(s):  
Phan Duy Tung ◽  
Phan Huu Lam ◽  
Nguyen Thi Quynh Hoa
Keyword(s):  
Microstrip Antenna ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Negative Index ◽  
Split Ring ◽  
Complementary Split Ring Resonator ◽  
Metamaterial Antenna ◽  
Antenna Characteristics

A microstrip antenna using negative index metamaterial based on complementary split ring resonator (CSRR)-loaded ground has been investigated in order to miniaturize the size and improve the antenna characteristics. The proposed antennas are designed on FR4 material and simulated results are provided by HFSS software. The metamaterial antenna was reduced 75 % the overall size compared to the normal microstrip antenna. Furthermore, compared with the normal microstrip antenna, the antenna characteristics of the metamaterial antenna were improved significantly.  The proposed metamaterial antenna exhibited the antenna resonate at 2.45 GHz, the gain of higher than 6.5 dB and the bandwidth of 110 MHz through the whole WLAN band.  The obtained results indicated that the proposed antenna is a good candidate for WLAN applications.

scholarly journals Penta band single negative meta-atom absorber designed on square enclosed star-shaped modified split ring resonator for S-, C-, X- and Ku- bands microwave applications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Md. Rashedul Islam ◽  
Mohammad Tariqul Islam ◽  
Md. Moniruzzaman ◽  
Md. Samsuzzaman ◽  
Haslina Arshad
Keyword(s):  
Ring Resonator ◽  
Surface Current ◽  
Good Deal ◽  
Split Ring Resonator ◽  
Unit Cell ◽  
Q Factor ◽  
Split Ring ◽  
Ring Shape ◽  
Microwave Applications ◽  
Meta Atom

AbstractThis paper represents a penta band square enclosed star-shaped modified split ring resonator (SRR) based single negative meta-atom absorber (MAA) for multi-band microwave regime applications. FR-4 low-cost material has been used as a substrate to make the MAA unit cell with 0.101λ0 × 0.101λ0 of electrical size, where λ0 is the wavelength calculated at the lower resonance frequency of 3.80 GHz. There are two outer square split ring and one inner star ring shape resonator of 0.035 mm thickness of copper placed on the one side, and another side of the substrate has full copper to construct the desired unit cell. The MAA unit cell provides five absorption peaks of 97.87%, 93.65%, 92.66%, 99.95%, and 99.86% at the frequencies of 3.80, 5.65, 8.45, 10.82, and 15.92 GHz, respectively, which covers S-, C-, X-, and Ku- bands. The properties of MAA have been investigated and analyzed in the E-, H-fields and surface current. The EMR and highest Q factor of the designed MAA is 9.87 and 30.41, respectively, and it shows a single negative (SNG) property. Different types of parametric analysis have been done to show the better performance of absorption. Advanced Designed System (ADS) software has been used for equivalent circuit to verify the simulated S11 result obtained from the CST-2019 software. Experimental outcomes of the MAA unit cell have a good deal with the simulated result and measured result of the 24 × 20 array of unit cells also shown. Since the unit cell provides superior EMR, excellent Q-factor, and highest absorption so the recommended MAA can be effectively used as a penta band absorber in microwave applications, like notch filtering, sensing, reducing the unintended noise generated with the copper component of the satellite and radar antennas.

scholarly journals Modified Hexagonal Split Ring Resonator Based on an Epsilon-Negative Metamaterial for Triple-Band Satellite Communication

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 878
Author(s):  
Salah Uddin Afsar ◽  
Mohammad Rashed Iqbal Faruque ◽  
Mohammad Jakir Hossain ◽  
Mayeen Uddin Khandaker ◽  
Hamid Osman ◽  
...  
Keyword(s):  
Satellite Communication ◽  
Ring Resonator ◽  
Negative Refractive Index ◽  
Split Ring Resonator ◽  
Metal Strip ◽  
Unit Cell ◽  
Negative Permittivity ◽  
Long Distance ◽  
Split Ring ◽  
Triple Band

A triple-band epsilon-negative (ENG) metamaterial based on a split ring resonator (SSR) with a modified hexagonal-shaped metal strip proposed in this study is a new combination of a single slit square resonator and a modified hexagonal-shaped metal strip. The desired unit cell FR-4 (lossy) that was selected as the substrate was 1.6 mm thick. Following the assessment of the unit cell, a high-frequency electromagnetic simulator like the computer simulation technology (CST) microwave studio was applied to assess the S-parameters. The proposed design exhibited resonance at 2.89, 9.42, and 15.16 GHz. The unit cell also demonstrated negative permittivity in the frequency ranges 2.912–3.728 GHz, 9.552–10.144 GHz, and 15.216–17.328 GHz, along with a negative refractive index. An effective medium ratio (EMR) of 11.53 is an indicator of the goodness of the metamaterial unit cell. It is deliberate at the lowermost resonance frequency of 2.89 GHz. Moreover, the simulated results that were validated using HFSS and equivalent circuit model indicated slight variations. The proposed design was finalised based on several parametric studies, including design optimisation, different unit cell sizes, various substrate materials, and different electromagnetic (EM) field propagations. The proposed triple band (S, X, and Ku bands) negative permittivity metamaterial unit cell can be utilised for various wireless applications, such as microwave communication, satellite communication, and long-distance radio communication.

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