Frequency Reconfigurable Slotted Split-Ring Antenna

2019 ◽  
Vol 09 ◽  
Author(s):  
Falguni Raval ◽  
Tulsi Patel ◽  
Trushit Upadhyaya
Keyword(s):  
High Frequency ◽  
Low Cost ◽  
Reconfigurable Antenna ◽  
Network Analyzer ◽  
Split Ring ◽  
High Frequency Structure Simulator ◽  
Directional Radiation ◽  
Radiating Element ◽  
Ring Antenna ◽  
5 Ghz

Background & Objective: Partially grounded frequency reconfigurable antenna is discussed in this paper. Antenna frequency cover is 4.2 GHz to 7 GHz and it has reconfigurable notchband near 5 GHz frequency. Frequency rejection is achieved by using circular split-ring slots in radiating element. The antenna can be reconfigured at 5.1 GHz, 5.4 GHz and 5.9 GHz by creating more slots in outer most split-ring. Designed antennas are printed on FR-4, low-cost substrate having relative permittivity of 4.4 and thickness of 1.6 mm. Results & Conclusion: Simulation of antennas is carried out using High Frequency Structure Simulator (HFSS) software. Designed antenna has omni directional radiation pattern. The prototype antennas are fabricated and tested using network analyzer. Good matching is observed between simulated and measured results.

scholarly journals Generic Fabrication Technique of Graphene Based RF Sensor towards Biological Application

2021 ◽  
Vol 10 (2) ◽  
pp. 68-74
Author(s):  
Idris Musa ◽  
◽  
John Hedley ◽  
Keyword(s):  
High Frequency ◽  
Low Cost ◽  
Network Analyzer ◽  
Laser Machine ◽  
Biological Application ◽  
Sensing Element ◽  
High Frequency Structure Simulator ◽  
Rf Filter ◽  
Flexible Material ◽  
Kapton Tape

Herein presented, we demonstrate that a sensitive sensing/detection element was obtained from the laser treatment of a non-conducting flexible material exploiting laser machine, which can then potentially deploy as sensing element of a biosensor for possible usage in to sense and obtain the presence and quantity of the interested sample. The goal is to study and advance innovative means of fabricating a low-cost graphene sensor, employed as a Radio Frequency (RF) filter for disposable biomedical purposes. A material like Graphene can be fashioned by laser irradiation (Laser scribe) of Kapton tape implemented as a filter. The manufacture of the filter geometry was accomplished by means of a laser machine irradiating a Kapton tape on a chosen substrate (for this work a Flame Retardant 4 (FR-4)), by the application of the previous gotten parameters for the production. Various laser power values were employed for their manufacture and their corresponding conductivity was observed to range from 171 x10-6 S/mm to 279 x10-6 S/mm. The Raman spectrum results of the produced material has a D band peak at 1349.76 cm-1 , a G band of 1587.73 cm-1 and a 2D band peak of 2693.34 cm-1 . The ANSYS high-frequency structure simulator (HFSS) (for the Analysis of the System) simulation results signifies good outcomes, and opportunities to improve the material property are also being studied. Tests were also conducted by the utilization of a Vector Network Analyzer (VNA) to validating their feasibility of being deployed as the detection element of a biosensor, thus lending them the possibility to find implementation in disposable biological sensing.

Design of Low-Cost Miniaturized Metamaterial-Based Circular Split-Ring Monopole Radiating System for LTE Applications

2021 ◽  
pp. 2150233
Author(s):  
U. Surendar ◽  
S. Senthilkumar ◽  
J. William
Keyword(s):  
Low Cost ◽  
Impedance Matching ◽  
Side Lobe ◽  
Split Ring ◽  
Dimension Formula ◽  
Directional Radiation ◽  
Radiating Element ◽  
Compact Dimension ◽  
Lossy Material ◽  
Good Agreement

A compact low-cost metamaterial circular monopole antenna for LTE applications is presented here. This paper addresses an asymmetric circular split-ring radiator for 2.6[Formula: see text]GHz (LTE-7 band), 3.5[Formula: see text]GHz (LTE-22 band). The design here employs split rings with varying split gaps in the consecutive ring layers of the radiating element which helped in achieving better impedance matching for obtaining multiband operation. The work presented here demonstrates the feasibility of achieving double negative material property, without loading the SRR’s separately in the system. The antenna was modeled using a 1.6[Formula: see text]mm thick FR-4 lossy material. The simulated results were compared with measured results and found to be in good agreement with each other. Employing asymmetric split ring as radiator helped in achieving 29% of size reduction in the patch layer. The modified split-ring radiator achieved directional radiation pattern and minimum side-lobe levels with a peak gain of 1.29 and 0.204[Formula: see text]dB at the lower band and upper band, respectively. The compact dimension [Formula: see text] of the radiating system makes it suitable for LTE-WLAN/Wi-Max applications.

Reconfigurable Antenna

2016 ◽  
pp. 237-263
Author(s):  
Mohamad Kamal A Rahim ◽  
Huda A. A. Majid ◽  
Mohamad Rijal Hamid
Keyword(s):  
Communication Systems ◽  
Low Cost ◽  
Wireless Systems ◽  
Reconfigurable Antennas ◽  
Effective Length ◽  
Slot Antenna ◽  
Wireless Communication Systems ◽  
Reconfigurable Antenna ◽  
5 Ghz ◽  
Narrow Bands

Reconfigurable antennas have attracted a lot of attention especially in future wireless communication systems. Superior features such as reconfigurable capability, low cost, multi-purpose functions and size miniaturization have given reconfigurable antennas advantage to be integrated into a wireless systems. In this chapter, two types of reconfigurable antennas are discussed. First, frequency reconfigurable narrowband microstrip slot antenna (FRSA) is presented. The proposed antenna is designed to operate at six reconfigurable frequency bands from 2 GHz to 5 GHz with bidirectional radiation pattern. The second antenna design is frequency reconfigurable narrowband patch-slot antenna (FRPSA) is presented. The antenna is a combination of a microstrip patch and slot antenna. Nine different narrow bands are produced by tuning the effective length of the slot. The performances of the antenna in term of simulated and measured results are presented. In conclusion, good agreement between the simulated and measured results has been attained.

A U-matched printed antenna for dual-band WiFi applications

2014 ◽  
Vol 7 (5) ◽  
pp. 551-556 ◽  
Author(s):  
Churng-Jou Tsai ◽  
Bo-Yuan Tsai
Keyword(s):  
High Frequency ◽  
Microstrip Line ◽  
Access Point ◽  
Wireless Access ◽  
Dual Band ◽  
Frequency Bandwidth ◽  
Printed Antenna ◽  
Directional Radiation ◽  
5 Ghz ◽  
And Control

In this paper, a novel and compact center-fed dual-band WiFi printed antenna is presented. This antenna is designed using two different arms which correspond to the oscillation points of the dual band, and uses parasitic capacitance and U-shaped microstrip line to match and control the necessary bandwidth. The measured frequency bandwidth of this antenna is 2.3–2.61 GHz (310 MHz, 12.7%) at 2 GHz, and the high-frequency bandwidth is 4.82–5.84 GHz (1020 MHz, 19.1%) at 5 GHz, which meets the requirements for applications in global WiFi communication. This PCB antenna is double-sided, long, and narrow; its size is 7 × 45.9 × 1 mm3; it can be applied to wireless access point; and it has a near-omni-directional radiation pattern. The design, analysis, and measured results of this proposed antenna will be presented.

scholarly journals A Defected Structure Shaped CPW-Fed Wideband Microstrip Antenna for Wireless Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Puneet Khanna ◽  
Amar Sharma ◽  
Kshitij Shinghal ◽  
Arun Kumar
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Microstrip Antenna ◽  
Microstrip Line ◽  
Coplanar Waveguide ◽  
Network Analyzer ◽  
Large Space ◽  
Wireless Applications ◽  
High Frequency Structure Simulator ◽  
Good Agreement

A coplanar waveguide- (CPW-) fed compact wideband defected structure shaped microstrip antenna is proposed for wireless applications. Defected structure is produced by cutting theUshape antenna in the form of two-sided T shape. The proposed antenna consists of two-sidedTshape strip as compared to usual monopole patch antenna for minimizing the height of the antenna. The large space around the radiator is fully utilized as the ground is on the same plane as of radiator. Microstrip line feed is used to excite the proposed antenna placed on an FR4 substrate (dielectric constantεr=4.4). The antenna is practically fabricated and simulated. Simulated results of the proposed antenna have been obtained by using Ansoft High-Frequency Structure Simulator (HFSS) software. These results are compared with measured results by using network analyzer. Measured result shows good agreement with the simulated results. It is observed that the proposed antenna shows a wideband from 2.96 GHz to 7.95 GHz with three bands atf1=3.23 GHz,f2=4.93 GHz, andf3=7.04 GHz.

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.

Membrane antenna array based on substrate integrated waveguide technology for 94 GHz communication systems

2015 ◽  
Vol 8 (3) ◽  
pp. 633-641
Author(s):  
Hamsakutty Vettikalladi ◽  
Muhammad Kamran Saleem ◽  
Majeed A.S. Alkanhal
Keyword(s):  
High Frequency ◽  
Communication Systems ◽  
Impedance Bandwidth ◽  
Single Element ◽  
Substrate Integrated Waveguide ◽  
Rectangular Slot ◽  
High Frequency Structure Simulator ◽  
Microstrip Patch ◽  
5 Ghz ◽  
Good Agreement

The design and the results of a single slot coupled substrate integrated waveguide (SIW)-fed membrane antenna and a 1 × 4 array is presented for 94 GHz communication system. The membrane antenna is designed using Ansys high frequency structure simulator and consists of six layers. The microstrip patch antenna placed on the top pyralux substrate layer is excited by means of a longitudinal rectangular slot placed over the SIW structure in the bottom pyralux substrate. The simulated antenna impedance bandwidth is found to be 5 GHz (91.5–96.5 GHz) for both single element and 1 × 4 array. Furthermore, the gain is found to be 7 and 13 dBi for the single element and the 1 × 4 array elements, respectively. The results are verified using Computer Simulation Technology (CST) Microwave Studio and are found to be in good agreement.

scholarly journals E-Shaped H-Slotted Dual Band mmWave Antenna for 5G Technology

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1019
Author(s):  
Kiran Raheel ◽  
Ahsan Altaf ◽  
Arbab Waheed ◽  
Saad Hassan Kiani ◽  
Daniyal Ali Sehrai ◽  
...  
Keyword(s):  
Low Cost ◽  
Detailed Comparison ◽  
Antenna System ◽  
Dual Band ◽  
Network Analyzer ◽  
Mimo Antenna ◽  
Full Wave ◽  
Radiating Element ◽  
The Mean ◽  
5G Systems

The aim of this work is to propose a dual band millimeter wave (mmwave) MIMO antenna system for 5G technology. In addition, the arrangement of the antenna elements in an array should be in such a manner that without using the traditional decoupling structures and/or techniques, a reasonable isolation level must be achieved. To demonstrate this, a system consists of four radiating elements that are etched on a 0.508 mm-thick Rogers-5880 substrate. The dielectric constant of the substrate is 2.2 and the loss tangent is 0.0009. Each radiating element consists of three parts; an E-shaped patch, an H-shaped slot within a patch, and a transmission line. The system is resonating at two different mmwave frequencies, i.e., 28 GHz and 38 GHz with a minimum port isolation of 28 dB. The mean measured gain is found to be at 7.1 dBi at 28 GHz and 7.9 dBi at 38 GHz with average efficiency, and envelope correlation coefficient (ECC) of the system at 70%, and 0.0005 respectively. The proposed system is designed and simulated in a full-wave electromagnetic wave software Computer Simulation Technology (CST), fabricated using LPKF D104 milling machine, and measured using R&SZNA67 vector network analyzer. An excellent agreement is observed between the simulated and the measured results and a detailed comparison with the previous works is also presented. Due to attributes such as low-cost, easy to fabricate, and dual-band, it is believed that this system will find its application for future 5G systems.

scholarly journals Low Cost Antenna Design for the Application of Over the Horizon Surface Wave Radar

2019 ◽  
Vol 9 (2) ◽  
pp. 2215-2218
Keyword(s):  
Surface Wave ◽  
High Frequency ◽  
Return Loss ◽  
Linear Array ◽  
Low Cost ◽  
Antenna Design ◽  
High Frequency Structure Simulator ◽  
Water Region ◽  
Wave Radar ◽  
Communication Devices

The need for surveillance and security in Indonesian water region which can monitor activities of distance object such as illegal fishing, foreign vessels violation, piracy of vessels and smuggling can be done by using radio wave. Maritime radar over the horizon (OTH) surface wave is able to detect the existence of foreign vessels in Indonesian waters. Based on this, the study aimed to design a low cost antenna namely Yagi - Uda linear array antenna at 15 MHz frequency at frequency range 6 – 24 MHz for the application of over the horizon radar. Yagi - Uda antenna is superior in the spread of wave suitable to OTH Radar characteristic over the sea surface and big gain. Yagi - Uda antenna develops rapidly in communication system makes it applied in many modern communication devices nowadays. This antenna was designed and simulated using Simulator Ansoft High Frequency Structure Simulator (HFSS) version 13. The simulation result of the antenna design after doing optimization was return loss (S11) = -29,62 dB, VSWR = 1.068 and gain = 2,413 dBm.

scholarly journals An Equilateral Arm Inverted U-Slot and Notch Loaded UWB-CPMA with Rendered Ground Plane

2019 ◽  
Vol 9 (2) ◽  
pp. 1595-1600
Keyword(s):  
Loss Tangent ◽  
Parametric Study ◽  
High Frequency ◽  
Low Cost ◽  
Ground Plane ◽  
Ground Surface ◽  
The Other ◽  
Bandwidth Enhancement ◽  
High Frequency Structure Simulator ◽  
X Band

In this paper, a microstrip fed modified circular patch monopole antenna (CPMA) with the rendered ground surface is presented for bandwidth enhancement. In order to extend the bandwidth of a demonstrated antenna, symmetrical slots and equilateral arms inverted U-slot are loaded on the partial ground and patch individually. For additional enhancement in the secured bandwidth, symmetrical notches are truncated from the bottom of the patch. The antenna has a dimension of 30x40x1.6 mm3, which is erected on low cost, FR-4 substrate with relative permittivity , permeability and loss tangent of . The proposed design is analyzed and simulated using high frequency structure simulator (HFSS). The analyzed results are validated through experimented results. The proposed antenna offers a bandwidth of 140.2 % with a maximum radiation efficiency of 94 % over the frequency scope of 2.54 GHz to 14.47 GHz. The crosspolarization levels are also found to be 20-30 dB and 12-23 dB smaller than the co-polarized level for E-plane and H-plane respectively. For better execution and assessment of proposed antenna, a parametric study has been done to analyze the performance of antenna with variations in the length of a partial ground conductor beside the other parameters. The exhibited antenna is suitable for various applications incorporating WiMAX, WLAN, UWB, C-band, X-band and UWB.

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