scholarly journals Bandwidth Enhancement of Cross-Shaped Fractal Antenna Using Lanthanum Doped Ba-Sr Hexagonal Ferrite As Substrate Material For X-Band Applications

2021 ◽  
Author(s):  
Shally Gujral ◽  
Kamaljit Singh Bhatia ◽  
Harjitpal Singh ◽  
Harsimrat Kaur ◽  
Nancy Gupta
Keyword(s):  
Weather Forecasting ◽  
Solid State Reaction Method ◽  
Substrate Material ◽  
Hexagonal Ferrite ◽  
Antenna Design ◽  
Fractal Antenna ◽  
Antenna Structure ◽  
High Frequency Structure Simulator ◽  
X Band ◽  
Ferrite Substrate

Abstract This paper analyzes and compares the performance of a proposed cross-shaped fractal antenna design with two different substrate materials FR4 epoxy and lanthanum doped Ba-Sr hexagonal ferrite in X-band, where the lanthanum doped Ba-Sr hexagonal ferrite substrate is synthesized based on solid-state reaction method. The proposed antenna design is simulated using HFSS (High frequency structure simulator) version 15. The antenna is intended to work at 10 GHz frequency and involves four iterations. The antenna design is optimized for significant performance parameters viz. return loss, bandwidth, and gain. It provides better results with ferrite substrate as compared to FR4 epoxy substrate and provides − 10 dB broad bandwidth in three frequency regions 6.2969-6.4 GHz, 7.8702-9.44 GHz, and 9.68-9.7746 GHz. The prototype of proposed antenna with FR4 epoxy substrate is fabricated and tested to attain experimental results. The measured results are in good liaison with simulated results. This antenna structure can be considered suitable for RADAR, satellite, microwave communication, and weather forecasting applications in X-Band.

scholarly journals Performance Enhancement of Metamaterial Loaded Micro Strip Patch Antenna Design Using Gallium Doped Ba-Sr Hexagonal Ferrite as Substrate Material for X-band Applications

2021 ◽  
Author(s):  
Monika Rani ◽  
kamal Jit bhatia ◽  
Harjitpal Singh ◽  
Harsimrat Kaur ◽  
Nancy Gupta
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Performance Enhancement ◽  
Substrate Material ◽  
Performance Comparison ◽  
Hexagonal Ferrite ◽  
Center Frequency ◽  
Antenna Structure ◽  
X Band ◽  
Ferrite Substrate

Abstract An experimental study of microstrip patch antenna designed and fabricated on FR4 epoxy substrate is presented. Further a performance comparison of designed antenna is made with proposed design using Gallium doped Ba-Sr hexagonal ferrite substrate. Microstrip feed line is used for inputting the signal to antenna. The whole simulation is done on HFSS simulator (version 13.0).The center frequency for proposed antenna is 10GHz and is optimized for significant performance parameters viz return loss, bandwidth, VSWR and gain. It was observed that the designed antenna provides better results with ferrite substrate as compared to FR4 epoxy substrate showing -10db broad bandwidth of 4.2GHz in the frequency region 8.2GHz to 12.4GHz. Although, the results of other parameters like return loss, VSWR and gain are found to be optimum with FR4 substrate as compared to mentioned ferrite substrate. The prototype of proposed antenna with FR4 epoxy substrate is fabricated and tested to attain the experimental results. The measured results are found to be better than simulated results. Thus the proposed antenna structure can be considered suitable for microwave communication application in X-band.

scholarly journals Performance Characteristics of Modified Sierpinski Fractal Antenna for Multiband Applications

2019 ◽  
Vol 8 (2) ◽  
pp. 2194-2200
Keyword(s):  
Communication Technology ◽  
High Frequency ◽  
Fractal Antenna ◽  
Efficient Tool ◽  
Radiation Characteristics ◽  
Resonant Frequencies ◽  
Antenna Structure ◽  
Rectangular Slot ◽  
High Frequency Structure Simulator ◽  
X Band

The emerging advanced wireless communication technology desires more compact, multiband, moderate gain antennas. These features can be accomplished by designing of the Fractal antennas with advanced features. This paper introduces a Modified Sierpinski Fractal antenna with compact, multiband and moderate gain specifications with an embedded Rectangular slot on the regular Sierpinski triangle . The fractalisation is extended from 0 to 4 iterations to examine the radiation characteristics. Two substrate materials ARLON, FR4-epoxy are considered individually with Ԑr values 2.2, 4.4 respectively and the height of the substrate is chosen as 1.6 mm. The efficient tool ANSYS HFSS High frequency structure simulator software package is used to design and simulate the proposed antenna structure in the frequency band of 1 to 10 GHz. The simulation results are reported and studied for all the four iterations in which the 4th iteration final geometry possess better results with 4 resonant frequencies that resonates in C band and X band in case of ARLON whereas 6 resonant frequencies obtained in the same frequency bands in case of FR4 epoxy. The multiband behavior can make these structures to serve in Satellite, Military and Radar wireless communications. The resultant gain values are also maximum about 13.67dB for ARLON and 7.69 dB for FR4-epoxy materials. It is also observed that the percentage of miniaturization of about 71.53% is obtained with this modified rectangular slotted fractal geometry, suitable to multiband applications.

CPW-Fed Wide Band Micro-machined Fractal Antenna with Band-notched Function

2020 ◽  
Vol 35 (8) ◽  
pp. 929-935
Author(s):  
Ashwini Kumar ◽  
Amar Pharwaha
Keyword(s):  
Integrated Circuits ◽  
Low Cost ◽  
Wide Band ◽  
Impedance Bandwidth ◽  
Fractal Antenna ◽  
Sierpinski Carpet ◽  
Antenna Structure ◽  
High Frequency Structure Simulator ◽  
Novel Structure ◽  
Sierpiński Carpet

In this paper, a straightforward yet effective design methodology to design wideband antenna with band notched characteristics has been proposed. Sierpinski carpet fractal geometry has been used to realize the antenna structure. Co-planar waveguide feed is used with a novel structure to achieve larger impedance bandwidth and band notching characteristics. Proposed antenna is designed using High Frequency Structure Simulator (HFSS) on a low cost FR4 substrate (ɛr=4.4) which resonates at three frequencies 1.51 GHz (1.19-2.06GHz), 6.53 GHz and 8.99 GHz (4.44-9.54 GHz) while a band is notched at 10.46 GHz (9.32-11.92 GHz). The proposed antenna has an electrical dimension of 0.36 λm× 0.24 λm, here λm is the wavelength with respect to lowest resonating frequency of the antenna. The resonating and radiation characteristics of the antenna are verified experimentally. Further, investigations are made to achieve easy integration of the antenna to the monolithic microwave integrated circuits. For that the antenna has been designed on micro-machined high index Silicon substrate which improve matching and gain of the antenna. The results of the micro-machined Sierpinski carpet fractal antenna are highly convincing over the conventional FR4 based antenna.

scholarly journals Fractal Antenna Design for Various Multiband Applications

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1813-1816
Keyword(s):  
High Frequency ◽  
Power Transmission ◽  
Antenna Design ◽  
Light Weight ◽  
Fractal Antenna ◽  
Wireless Power ◽  
High Frequency Structure Simulator ◽  
Rectangular Patch ◽  
Low Profile ◽  
5 Ghz

In this paper “Micro Strip Patch Antenna (F-MSPA)” based on fractal is proposed to perform operations over multiband for a specific time bound. This is designed specifically for “Wireless Power Transmission (WPT)” System which is light weight or it is low profile and light weight when implemented. The main aim of proposed methodology or design of antenna is attained by implementing the basic patch called as the rectangular patch, whose scope is till the third level. Based on this the shape of rectangular cuttings are obtained. The antenna is excited by the obtained or generated micro strip feed as the operations of antenna are performed over various frequency ranges between 1GHz to maximum of 5 GHz. The proposed method comprises of fractal antenna resonant with quad frequencies that ranges: 1.86GHz / 2.29GHz / 3.02GHz / 4.50GHz along with their generated loss values are 13.59dB / -23.66dB / -15.94dB / -15.69dB. Proposed antenna simulation is performed using Ansoft HFSSv13 a high frequency structure simulator.

scholarly journals Design of Multiband Fractal Antenna

2018 ◽  
Vol 7 (2.20) ◽  
pp. 295
Author(s):  
B S. Nageswara Rao ◽  
E E. Srinivasa Murthy
Keyword(s):  
High Frequency ◽  
The Self ◽  
Antenna Design ◽  
Fractal Antenna ◽  
Self Similarity ◽  
Frequency Bands ◽  
X Band ◽  
Self Similar ◽  
Fractional Dimensions ◽  
Ku Band

Fractal is a fragmented geometry which can be segmented into various parts, each part will be the miniature copy of the whole. The main advantages of fractal antennas are its reduced size and multiband operation. These structures have self-similarity properties and fractional dimensions. The self-similar geometrical nature of fractal facilitates the antenna design to achieve multiband applications. The proposed fractal antenna can be operated in different frequencies and 2 frequency bands. The obtained frequency bands are X- band and Ku- band. The proposed antenna has been designed, simulated and analyzed by using HFSS (High Frequency Structural Simulator) software 15.0.  

scholarly journals Tree shaped fractal antenna with multiband characteristics

2017 ◽  
Vol 7 (1.1) ◽  
pp. 333 ◽  
Author(s):  
B T P Madhav ◽  
V Subba Reddy ◽  
D Rajasekar Reddy ◽  
K Ravi Sankar ◽  
E V.S.Harsha Ramanujan ◽  
...  
Keyword(s):  
Weather Forecasting ◽  
Ground Plane ◽  
Wide Band ◽  
Substrate Material ◽  
Fractal Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Radar Systems ◽  
Impedance Characteristics ◽  
Multiple Band

A tree shaped fractal antenna with U shaped slot and W-shaped slot has been designed and analyzed in this article by using ANSYS elec-tromagnetic desktop 17. The proposed antenna is analyzed taking FR4 substrate is taken as the substrate material. The proposed antenna exhibits multiband characteristics (2.75-3.17GHz, 4.1-4.8GHz, 5.1-5.3GHz and 5.4-6.3GHz, 7.21-12.8GHz) in the Ultra-wide band region. The path that is radiating by superposition of the rectangular patches and multiple-band operating frequency is obtained by increasing the U-shapes slots and w-shaped slot on the patch. The improvement in the impedance characteristics between the adjacent frequencies is achieved by using defected ground structure (DGS) on the ground plane as to cover the region of UWB application (3.1-10.6GHz). The proposed antenna works in the applications like Wi-Max, Weather forecasting RADAR systems and WLAN. 

scholarly journals DESIGN AND ANALYSIS OF MODIFIED CIRCULAR FRACTAL ANTENNA FOR S, C AND X-BAND APPLICATIONS

2021 ◽  
Vol 5 (12) ◽  
Author(s):  
Taniya .
Keyword(s):  
High Frequency ◽  
Return Loss ◽  
Satellite Communication ◽  
Network Analyzer ◽  
Fractal Antenna ◽  
Construction Costs ◽  
High Frequency Structure Simulator ◽  
Telecommunication Satellite ◽  
X Band ◽  
Radar Applications

In this paper, presenting the design and analysis of Modified Circular Fractal Antenna (MCFA) for S, C and X- band applications. Used the defined range of Sband is 2GHz-4GHz, C-band is 4GHz-8GHz and X-band is 8GHz-12GHz. S-band communication antennas have application in weather, tracking, and microwave oven. Cband antennas are useful in telecommunication, satellite communication and X-band is useful in radar applications. The proposed antenna has been implanted on FR4-epoxy substrate with the dielectric constant of 4.4 and height of 1.6 mm. Circular fractal antenna exhibits all required parameters that depends on the sizq and feed line position of the circular patch. The antenna has also been fabricated with optimized dimensions and then tested. The proposed antenna is fed by a microstrip line feed. The proposed antenna has been designed and simulated by HFSS vs 13.0 (High Frequency Structure Simulator). The various antenna parameters such as return loss, VSWR, gain and radiation pattern has been calculated. This proposed antenna operates at five different frequencies 2.87GHz, 6.39GHz, 6.89GHz, 8.00GHz and 8.51 GHz. The vector Network Analyzer (VNA) of proposed antenna is used for the measurement of return loss, VSWR. The simulated and measured results are compared and are found to be a good relative values with each other. Small in size, reduction in construction costs are the advantages of proposed antenna.

Tunable graphene nanopatch antenna design for on-chip integrated terahertz detector arrays with potential application in cancer imaging

Nanomedicine ◽  
2021 ◽  
Author(s):  
Debabrata Samanta ◽  
MP Karthikeyan ◽  
Amit Banerjee ◽  
Hiroshi Inokawa
Keyword(s):  
High Frequency ◽  
Semiconductor Device ◽  
Substrate Material ◽  
Device Fabrication ◽  
Antenna Design ◽  
The Finite Element Method ◽  
Detector Arrays ◽  
High Frequency Structure Simulator ◽  
Mode Decomposition ◽  
On Chip

Aim: Further to our reports on chip-integrable uncooled terahertz microbolometer arrays, compatible with medium-scale semiconductor device fabrication processes, the possibility of the development of chip-integrable medical device is proposed here. Methods: The concept of graphene-based nanopatch antennas with design optimization by the finite element method (FEM) is explored. The high-frequency structure simulator (HFSS) utilized fine FEM solver for analyzing empirical mode decomposition preprocessing and for modeling and simulating graphene antennas. Results: Graphene nanopatch antennas exhibited tunable features with varying patch dimensions and dependence on substrate material permittivity. Conclusion: This work implements reconfigurable graphene nanopatch antenna compatible with terahertz microbolometer arrays. This design concept further develops on-chip medical devices for possible screening of cancer cell with terahertz image processing.

scholarly journals Fractal Antenna Design for Multiple Applications

2018 ◽  
Vol 7 (2.7) ◽  
pp. 602
Author(s):  
Vasujadevi M ◽  
K Akhil Teja ◽  
G Divya ◽  
VV Sai Shanmukh ◽  
K R Dheeraj
Keyword(s):  
Dielectric Constant ◽  
Antenna Design ◽  
Operating Frequency ◽  
Fractal Antenna ◽  
Wireless Applications ◽  
Multiband Antennas ◽  
Ansoft Hfss ◽  
X Band ◽  
Ku Band

The sudden development in in wireless applications has leveled up the use of antennas. Multiband antennas are used to operate at different frequencies for the reliability in various applications. This paper presents design of a novel fractal antenna for multiband applications. Attributes of proposed antenna are simulated using Ansoft HFSS. Due to the homogeneous property in the design of proposed fractal receiving wire it has the various multiband applications. Proposed Antenna design consists of FR4_epoxy material with dielectric constant of 4.4, height 1.6 mm. The operating frequency is taken as 2.4GHz. The antenna is simulated. The proposed antenna resonates at different frequencies. The results are measured and return losses are compared. Here the geometry of fractal antenna is analyzed for the C band resonating at 6.2 GHz, X band resonating at 11.9 GHz and Ku band resonating at 13.8 GHz for S11<-10db.  

scholarly journals Design and Analysis of Multiband Bloom Shaped Patch Antenna for IoT Applications

2021 ◽  
Vol 12 (3) ◽  
pp. 4578-4585
Author(s):  
R Ramasamy Et.al
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Low Cost ◽  
Substrate Material ◽  
Experimental Results ◽  
Antenna Design ◽  
Ratio Measurement ◽  
Antenna Structure ◽  
Iot Applications ◽  
Gain Measurement

A Microstrip Bloom shaped patch antenna is proposed for Internet of Things (IoT) application. This antenna operates at multiband frequencies between 1.6 GHz to 2.45 GHz. The Bloom shaped antenna provides multiband response that examined in HFSS Software. In this proposed antenna design, FR4 substrate material is used because it is easily available and low cost.  The proposed antenna structure simulated and analyzed in different experimental results including return loss measurement, Voltage Standing Wave Ratio measurement, radiation pattern measurement and gain measurement. This proposed Multiband Microstrip Bloom shaped patch antenna provides better experimental results in all the parameters

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