Dual-Band BSF with Enhanced Quality Factor

2021 ◽  
Vol 36 (1) ◽  
pp. 89-98
Author(s):  
Asmaa Farahat ◽  
Khalid Hussein
Keyword(s):  
Impedance Matching ◽  
Dielectric Substrate ◽  
Substrate Material ◽  
Dual Band ◽  
Finite Width ◽  
Q Factor ◽  
High Q ◽  
Final Design ◽  
The Difference ◽  
Good Agreement

In the present work, a U-shaped CPW resonator (CPWR) with, generally, unequal arms is proposed to produce high Q-factor bandstop filter (BSF) based on broadside-coupling between the CPWR and a CPW through-line (CPWTL), which are printed on opposite faces of a thin substrate. The unequal arms of the U-shape and the finite width of the ground strips of the CPWR are shown to produce much higher Q-factor than that of equal arms and infinitely extending side ground planes. The dimensions of the CPWTL are optimized for impedance matching while the dimensions of the CPWR are optimized to obtain the highest Q-factor. The effect of the loss tangent of the dielectric substrate material on the Q-factor is investigated. It is shown that the difference between the lengths of the unequal arms of the U-shaped resonator can be used to control the Q-factor. Thanks to the computational efficiency of the employed electromagnetic simulator, enough number of trials has been successfully performed in reasonable time to arrive at the final design of the BSF. A prototype of the proposed BSF is fabricated for experimental investigation of its performance. The experimental measurements show good agreement when compared with the corresponding simulation results.

scholarly journals Metamaterial inspired multi-split square shaped printed antenna for WLAN applications

2021 ◽  
Vol 2070 (1) ◽  
pp. 012110
Author(s):  
S. Imaculate Rosaline
Keyword(s):  
Microstrip Antenna ◽  
Impedance Matching ◽  
Negative Permittivity ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Retrieval Method ◽  
S Parameter ◽  
Radiating Element ◽  
Compact Dimension ◽  
Good Agreement

Abstract This paper describes the design of a compact dual band microstrip antenna based on metamaterial inspired split ring radiating element and a complementary spilt ring resonator (CSRR). The antenna has a very compact dimension of 20×20×0.8 mm3. It covers the 2.5/5.2/5.8 GHz frequencies, pertaining to IEEE 802.11 b/g/a standards suitable for WLAN applications with a -10dB impedance bandwidth of 250 MHz and 860 MHz. The CSRR creates a negative permittivity region, thus providing miniaturization of the antenna and the introduction of additional split gaps in the radiating element creates a positive permeability within the desirable frequency range, yielding better impedance matching. The negative properties of those structures are verified using S-parameter retrieval method. A prototype of the proposed antenna is fabricated and the measured results are fairly in good agreement with the simulation results. Dipole like radiation patterns are observed at both the operating frequencies. The measured peak gains are 0.58 dBi, 1.27 dBi and 2.10 dBi at 2.5, 5.2 and 5.8 GHz respectively.

New Fabrication Method for High-Q MEMS Inductors

2012 ◽  
Author(s):  
Wen-Cheng Kuo ◽  
Chao-Yang Hsu ◽  
Yao-Joe Yang
Keyword(s):  
Data Transmission ◽  
Picosecond Laser ◽  
Substrate Material ◽  
Q Factor ◽  
Fabrication Method ◽  
Test Device ◽  
Parylene C ◽  
High Q ◽  
Metal Thickness

This study presents a novel fabrication method to enhance the quality of flexible MEMS inductors for wireless energy and data transmission applications. The fabrication process used parylene C as a polymeric substrate material with a thickness of 50 μm and patterned by a picosecond laser. We modeled the test device in a simulation and then verified its feasibility through experimentation. We computed the projected Q-factor enhancement to be approximately 8.9x the 2 μm metal thickness of traditional evaporation methods at a 1 MHz operation frequency. The thickness of the metal, integrated with picosecond laser-cutting technology, resulted in an enhanced Q-factor compared to traditional multilayer or fold-and-bond methods. The production process was simple and did not require a bonding process. The research indicated that such Q-enhanced MEMS inductors could be integrated with biomedical implants for wireless energy and data transmission applications.

Fork-shaped planar antenna for Bluetooth, WLAN, and WiMAX applications

2016 ◽  
Vol 9 (4) ◽  
pp. 859-864 ◽  
Author(s):  
Alaknanda Kunwar ◽  
Anil Kumar Gautam
Keyword(s):  
Impedance Matching ◽  
Ground Plane ◽  
Dielectric Substrate ◽  
Dual Band ◽  
Planar Antenna ◽  
Rectangular Slot ◽  
Feed Line ◽  
Defected Ground Plane ◽  
Microstrip Feed Line ◽  
Microstrip Feed

A microstrip transmission line fed fork-shaped planar antenna is proposed for Bluetooth, WLAN, and WiMAX applications. The antenna made of a microstrip feed line, fork-shape patch on one side and defected ground plane on the other side of dielectric substrate. A fork-shape is formed by two side circular arms and a rectangular central arm. The inverted T-shaped ground plane with a rectangular slot in the center arm is used to increase the bandwidth with better impedance matching of the lower band. The antenna is practically fabricated to validate the design. The antenna resonate dual band to cover an entire the WLAN and WiMAX bands. The antenna shows the measured bandwidth of 410 MHz (2.26–2.67) and 3.78 GHz (3.0–6.78 GHz) at lower and upper bands, respectively.

scholarly journals Dual Band Patch Antenna Based on Letter Slotted DGS for 5G Sub-6GHz Application

2021 ◽  
Vol 2128 (1) ◽  
pp. 012008
Author(s):  
Mohamed Fathy Abo Sree ◽  
Mohamed Hassan Abd Elazeem ◽  
Wael Swelam
Keyword(s):  
Patch Antenna ◽  
Simulation Analysis ◽  
Surface Current ◽  
Dielectric Substrate ◽  
High Gain ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Microstrip Patch ◽  
Good Agreement

Abstract To design a multiband microstrip patch antenna, the Defected Ground Structure (DGS) technique is applied to add a disturbance effect in the surface current distribution and create a multi-resonance frequency. Furthermore, and in the aim to achieve a high gain, a high superstrate is added above the basic antenna design. The developed antenna is dedicated to the 5G sub 6GHz band application. The proposed antenna is based on RO5880 dielectric substrate of ɛ=2.2 and has an overall dimension of 77×70.11×1.6 mm3. The antenna operates at a sub 6GHz frequency range (at 4.53 to 4.97 GHz) and fits in 5G band application standard. Using CST Studio Suite Electromagnetics (EM) Solver, antenna’s performances are investigated; an average gain of 5 dB with acceptable radiation efficiency is obtained at the operating frequencies, suitable for sub-6GHz 5G application. The proposed antenna is fabricated, and experimental analysis is conducted using ROHDE & SCHWARZ ZVB20 network analyser, which shows a good agreement with the simulation analysis.

scholarly journals Dual Band-Notched UWB Antenna based on Electromagnetic Band Gap Structures

2011 ◽  
Vol 1 (2) ◽  
Author(s):  
Son Trinh-Van ◽  
Chien Dao-Ngoc
Keyword(s):  
Band Gap ◽  
Frequency Band ◽  
Stop Band ◽  
Ultra Wideband ◽  
Dual Band ◽  
Uwb Antenna ◽  
Directional Characteristic ◽  
Electromagnetic Band Gap ◽  
Final Design ◽  
Good Agreement

A printed ultra-wideband (UWB) antenna with dual band-notched characteristics based on electromagnetic band-gap (EBG) structure is presented. To produce dual-band rejection, the microstrip feed line is placed between two pairs of EBG cells which are designed to act as stop-band filters. The final design of the antenna satisfies the voltage standing wave ratio (VSWR) requirement of less than 2.0 in a bandwidth spreading from 2.275 GHz to 10.835 GHz, which entirely covers UWB frequency band allocated from 3.1 to 10.6 GHz. The antenna also shows dual band-notched performance at the frequency bands of 3.375 − 3.875 GHz for WiMAX and 5.325 − 6.150 GHz for WLAN, while possessing omni-directional characteristic in the whole operating frequency band. The results show good agreement between simulation and measurement.

scholarly journals Design of Microstrip Patch Antenna for Dual-band Operation using Metal Ring Superstrate

2020 ◽  
Vol 8 (5) ◽  
pp. 4539-4543
Keyword(s):  
Patch Antenna ◽  
Dielectric Substrate ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Metal Ring ◽  
Microstrip Patch ◽  
Rectangular Patch ◽  
Lower Band ◽  
Good Agreement

In this paper, a dual-band generation in rectangular microstrip patch antenna (RMPA) using a superstrate metal ring has been proposed. In this configuration, a metal ring is placed above the rectangular patch with the support of two dielectric posts. The metal ring behaves as a superstrate layer and resonator for the lower band, the other band is generated by microstrip patch and hence the combined configuration metal ring and patch gives dual-band characteristics. The lower band resonates at 9 GHz with an impedance bandwidth of 6.8% and higher band at 11.35 GHz with impedance bandwidth of 3.1%. The co-polarized peak gain values at these frequencies are 8.2 dBi and 10.1 dBi respectively. This may be used in applications like airborne and naval-radar. The prototypes are fabricated using commercially available dielectric substrate (RT-Duriod r = 2.2 and thickness h =1.6 mm). The measured results show good agreement with the simulated predictions.

Compact dual-band millimeter-wave antenna for 5G WLAN

2021 ◽  
pp. 1-8
Author(s):  
Melvin Chamakalayil Jose ◽  
Sankararajan Radha ◽  
Balakrishnapillai Suseela Sreeja ◽  
Mohammed Gulam Nabi Alsath ◽  
Pratap Kumar
Keyword(s):  
Impedance Matching ◽  
Dielectric Substrate ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Defected Ground Structure ◽  
Compact Structure ◽  
Low Profile ◽  
Millimeter Wave Antenna ◽  
Measured Impedance

Abstract This paper presents a novel compact dual-band printed antenna with an omnidirectional radiation pattern for 5G WLAN. The antenna element comprises a star-shaped patch with six disc-shaped elements at the top and a defected ground structure at the bottom, having a radius of 3.77 mm for both. The proper feeding point and alignment with its element parameters help to achieve good impedance matching. The proposed antenna has a single center feed, a low profile, and a straightforward compact structure without any feeding complexity. A high reception fidelity antenna with comparable bandwidth and moderate gain is presented. The prototype radiator was printed on a 4 mm radius and a 1.6 mm thick dielectric substrate (Rogers RT/Duroid 5880), with a dielectric constant of 2.2. The designed antenna is fabricated and measured to validate the simulation result. The measured impedance bandwidth of 1.3 GHz (27.5–28.8 GHz) and 2.2 GHz (32.45–34.65 GHz) with a respective measured gain of 1.1 and 3.2 dBi are achieved at 28 and 34 GHz. The simulated radiation efficiency of above 95% is achieved for both bands. A good agreement between simulated and measured results of the proposed work shows that the proposed antenna is suitable for 5G short-range WLAN communications.

Design of Dual Band Meta-Material Resonator Sensor for Material Characterization

2021 ◽  
Vol 36 (4) ◽  
pp. 473-478
Author(s):  
Sucitra Harry ◽  
Zahriladha Zakaria ◽  
Maizatul Said ◽  
Rammah Alahnomi ◽  
M. Misran
Keyword(s):  
Resonance Frequency ◽  
Material Characterization ◽  
Empirical Equation ◽  
Narrow Band ◽  
High Sensitivity ◽  
Dual Band ◽  
Network Analyzer ◽  
Q Factor ◽  
High Q ◽  
Sensing Applications

This paper describes the design and implementation of the dual band metamaterial resonator for sensing applications by employing perturbation theory in which the dielectric properties of resonator affect Q-factor and resonance frequency. The designed sensor operates at two resonance frequency 3.20 GHz and 4.18 GHz in the range of 1 GHz to 5.5 GHz for testing solid materials. The Computer Simulation Technology (CST) software is used to design and model this sensor and it was analyzed by using vector network analyzer (VNA) for testing measurement. This study uses empirical equation from the tested materials with well-known permittivity to estimate the permittivity of other materials with unknown permittivity. The proposed sensor has achieved a narrow band with high Q-factor value of 642 and 521 at the operating frequencies of 3.16 GHz and 4.18 GHz respectively. These findings are compared with findings of previous study and the proposed sensor has achieved a high sensitivity and accuracy of 80% compare to others. This is proof that this senor could be used to characterize materials and sensing applications.

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