scholarly journals A Metamaterial Backed Dipole Antenna for High Gain Directional Communications

2016 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
V. P. Sarin ◽  
M. P. Jayakrishnan ◽  
C. K. Aanandan ◽  
M. Pezholil ◽  
V. Kesavath
Keyword(s):  
Dielectric Constant ◽  
Ring Resonator ◽  
Low Cost ◽  
High Gain ◽  
Split Ring Resonator ◽  
Dipole Antenna ◽  
Metamaterial Structure ◽  
Split Ring ◽  
Reflection Phase ◽  
Continuous Wire

The enhanced radiation performance of a dipole antenna backed by the split ring resonator-continuous wire pair array working in the H┴ excitation scenario is presented in this paper.  The H┴ excitation scenario of the metamaterial is used to get zero reflection phase resulting in enhanced gain performance. The two layer meta-structure along with the dipole is fabricated on a low cost substrate of dielectric constant 4.4 and height 1mm. The reflection properties of the metamaterial structure and its effect on the radiation performance of the dipole antenna are presented in this paper.

Design and Fabrication of 3D Printed Reconfigurable Metamaterial-inspired Structures

2019 ◽  
Vol 2019 (1) ◽  
pp. 000595-000598
Author(s):  
Saranraj Karuppuswami ◽  
Avi Rajendra-Nicolucci ◽  
Saikat Mondal ◽  
Mohd Ifwat Mohd Ghazali ◽  
Premjeet Chahal
Keyword(s):  
High Temperature ◽  
Small Volume ◽  
Ring Resonator ◽  
Low Cost ◽  
Microfluidic Channel ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Liquid Samples ◽  
Volatile Organic ◽  
3D Printed

Abstract In this paper, 3D printing is used as an alternative manufacturing technique to fabricate metamaterial-inspired RF structures for liquid profiling. A dual split-ring resonator (SRR) based sensor tag is designed and integrated with a microfluidic channel for detecting different liquid samples. The sensor is 3D printed using a high-temperature resin and metallized using a custom developed metal patterning process. The sensor requires a very small volume of 8.6 μL of sample under test for detection. The resonance frequency of the SRR changes with change in sample loading and the shift is monitored for sample profiling. Different volatile organic compounds are introduced and the shift is monitored demonstrating the sensitivity of the proposed tag. The low-cost, real-time nature of the tag makes it an ideal choice for monitoring liquids along the supply chain.

scholarly journals Efficient and Compact Near-Field Coupled Hybrid Antenna Using a Single Radiating Subwavelength Split-Ring Resonator

Electronics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 527
Author(s):  
Zinching Dang ◽  
Marco Rahm
Keyword(s):  
Resonance Frequency ◽  
Electromagnetic Waves ◽  
Ring Resonator ◽  
Near Field ◽  
Low Frequency ◽  
Split Ring Resonator ◽  
Dipole Antenna ◽  
Angular Width ◽  
Split Ring ◽  
Broadband Internet

Modern applications in the realms of wireless communication and mobile broadband Internet increase the demand for compact antennas with well defined directivity. Here, we present an approach for the design and implementation of hybrid antennas consisting of a classic feeding antenna that is near-field-coupled to a subwavelength resonator. In such a combined structure, the composite antenna always radiates at the resonance frequency of the subwavelength oscillator as well as at the resonance frequency of the feeding antenna. While the classic antenna serves as impedance-matched feeding element, the subwavelength resonator induces an additional resonance to the composite antenna. In general, these near-field coupled structures are known for decades and are lately published as near-field resonant parasitic antennas. We describe an antenna design consisting of a high-frequency electric dipole antenna at f d = 25 GHz that couples to a low-frequency subwavelength split-ring resonator, which emits electromagnetic waves at f SRR = 10.41 GHz. The radiating part of the antenna has a size of approximately 3.2 mm × 8 mm × 1 mm and thus is electrically small at this frequency with a product k · a = 0.5 . The input return loss of the antenna was moderate at − 18 dB and it radiated at a spectral bandwidth of 120 MHz. The measured main lobe of the antenna was observed at 60 ∘ with a − 3 dB angular width of 65 ∘ in the E-plane and at 130 ∘ with a − 3 dB angular width of 145 ∘ in the H-plane.

A Low-Cost Multiple Complementary Split-Ring Resonator-Based Microwave Sensor for Contactless Dielectric Characterization of Liquids

2020 ◽  
Vol 20 (19) ◽  
pp. 11326-11334
Author(s):  
Ahmed Javed ◽  
Ali Arif ◽  
Muhammad Zubair ◽  
Muhammad Qasim Mehmood ◽  
Kashif Riaz
Keyword(s):  
Ring Resonator ◽  
Low Cost ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Dielectric Characterization ◽  
Complementary Split Ring Resonator ◽  
Microwave Sensor

scholarly journals Shield Optimization and Formulation of Regression Equations for Split-Ring Resonator

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Tahir Ejaz ◽  
Hamood Ur Rahman ◽  
T. Tauqeer ◽  
Adnan Masood ◽  
Tahir Zaidi
Keyword(s):  
Resonant Frequency ◽  
Quality Factor ◽  
Ring Resonator ◽  
Low Cost ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Regression Equations ◽  
Split Ring ◽  
Optimum Result ◽  
5 Ghz

Microwave resonators are widely used for numerous applications including communication, biomedical and chemical applications, material testing, and food grading. Split-ring resonators in both planar and nonplanar forms are a simple structure which has been in use for several decades. This type of resonator is characterized with low cost, ease of fabrication, moderate quality factor, low external noise interference, high stability, and so forth. Due to these attractive features and ease in handling, nonplanar form of structure has been utilized for material characterization in 1–5 GHz range. Resonant frequency and quality factor are two important parameters for determination of material properties utilizing perturbation theory. Shield made of conducting material is utilized to enclose split-ring resonator which enhances quality factor. This work presents a novel technique to develop shield around a predesigned nonplanar split-ring resonator to yield optimized quality factor. Based on this technique and statistical analysis regression equations have also been formulated for resonant frequency and quality factor which is a major outcome of this work. These equations quantify dependence of output parameters on various factors of shield made of different materials. Such analysis is instrumental in development of devices/designs where improved/optimum result is required.

Flexible split-ring resonator metamaterial structure at microwave frequencies

2012 ◽  
Vol 54 (6) ◽  
pp. 1415-1416 ◽  
Author(s):  
P. Menon. Ragi ◽  
K. S. Umadevi ◽  
Paul. Nees ◽  
Jovia Jose ◽  
M. V. Keerthy ◽  
...  
Keyword(s):  
Ring Resonator ◽  
Split Ring Resonator ◽  
Metamaterial Structure ◽  
Split Ring ◽  
Microwave Frequencies

scholarly journals A design of high-gain end-fire antenna based on split-ring resonator structures

2015 ◽  
Vol 64 (23) ◽  
pp. 234101
Author(s):  
Liu Hong-Xi ◽  
Gao Jun ◽  
Cao Xiang-Yu ◽  
Liu Yan-Fang ◽  
Zhang Di ◽  
...  
Keyword(s):  
Ring Resonator ◽  
High Gain ◽  
Split Ring Resonator ◽  
Split Ring
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