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.

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.

scholarly journals Design of CPW-Fed Antenna with Defected Substrate for Wideband Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Amar Sharma ◽  
Puneet Khanna ◽  
Kshitij Shinghal ◽  
Arun Kumar
Keyword(s):  
High Frequency ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Group Delay ◽  
Ground Plane ◽  
Impedance Bandwidth ◽  
Radiation Characteristics ◽  
High Frequency Structure Simulator ◽  
X Band ◽  
Good Agreement

A CPW-fed defected substrate microstrip antenna is proposed. The proposed antenna shows wideband applications by choosing suitable defected crown shaped substrate. Defected substrate also reduces the size of an antenna. The radiating patch of proposed antenna is taken in the form of extended U-shape. The space around the radiator is utilized by extending the ground plane on both sides of radiator. Simulation of proposed antenna is done on Ansoft’s High Frequency Structure Simulator (HFSS v. 14). Measured results are in good agreement with simulated results. The prototype is taken with dimensions 36 mm × 42 mm × 1.6 mm that achieves good return loss, constant group delay, and good radiation characteristics within the entire operating band from 4.5 to 13.5 GHz (9.0 GHz) with 100% impedance bandwidth at 9.0 GHz centre frequency. Thus, the proposed antenna is applicable for C and X band applications.

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.

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 A Novel Rectangular Slot Loaded Microstrip Patch Antenna

2021 ◽  
Vol 9 (VII) ◽  
pp. 1613-1615
Author(s):  
Malipatil Shivashankar A
Keyword(s):  
Patch Antenna ◽  
Communication Systems ◽  
Substrate Material ◽  
Microstrip Patch Antenna ◽  
Low Loss ◽  
Radiation Characteristics ◽  
Rectangular Slot ◽  
Microstrip Patch ◽  
X Band ◽  
Linear Radiation

In this communication the inclined slot loaded rectangular microstrip patch antenna fed by microstripline is presented for modern communication system. The antenna is housed in a volume of 5X3X0.16cm3. The low loss tangent and commercially available modified glass epoxy substrate material is used for the fabrication of the antenna. The design concept is presented. The proposed antenna gives a maximum bandwidth of 20.78% and overall bandwidth of 44.49% with operating range of 8.28 GHz to 12 GHz. The antenna shows broadside and linear radiation characteristics with a peak gain of 7.08 dB. The experimental and simulated results are compared. This antenna may find its applications in X-band range communication systems.

scholarly journals A Square Patch with L and Inverted L shaped slotted AMC structure for Wi-Fi Applications

2020 ◽  
Vol 9 (1) ◽  
pp. 1722-1725
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
High Frequency ◽  
Return Loss ◽  
Band Width ◽  
Magnetic Conductor ◽  
Radiation Characteristics ◽  
Artificial Magnetic Conductor ◽  
High Frequency Structure Simulator ◽  
Phase Reflection

To improve the antenna characteristics in terms of bandwidth, gain and its radiation characteristics without providing any phase reflections, Artificial Magnetic Conductor (AMC) are used in antenna designing. This paper initially designed AMC structure for 2.4GHz frequency. The proposed AMC structure consists of three L shaped and inverted L shaped slots and provides zero degrees phase reflection at 2.4GHz resonant frequency. This proposed AMC structure is incorporated on conventional micro strip square patch antenna and results are simulated in High Frequency Structure Simulator (HFSS) software. The Proposed AMC incorporated patch antenna, return loss is improved from -16.16dB to -31.75dB, VSWR is from 1.42 to 1.05, the band width is increased from 16.5 MHz to 348.1 MHz This design resonates at a frequency of 2.4GHz and applicable to Wi-Fi applications.

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 A Passive Wireless Crack Sensor Based on Patch Antenna with Overlapping Sub-Patch

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4327 ◽  
Author(s):  
Songtao Xue ◽  
Zhuoran Yi ◽  
Liyu Xie ◽  
Guochun Wan ◽  
Tao Ding
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Crack Width ◽  
Patch Antennas ◽  
Cavity Model ◽  
Measuring Range ◽  
Resonant Frequencies ◽  
Frequency Shifts ◽  
Strain Transfer ◽  
High Frequency Structure Simulator

Monolithic patch antennas for deformation measurements are designed to be stressed. To avoid the issues of incomplete strain transfer ratio and insufficient bonding strength of stressed antennas, this paper presents a passive wireless crack sensor based on an unstressed patch antenna. The rectangular radiation patch of the proposed sensor is partially covered by a radiation sub-patch, and the overlapped length between them will induce the resonate frequency shift representing the crack width. First, the cavity model theory is adopted to show how the resonant frequencies of the crack sensor are related to the overlapped length between the patch antenna and the sub-patch. This phenomenon is further verified by numerical simulation using the Ansoft high-frequency structure simulator (HFSS), and results show a sensitivity of 120.24 MHz/mm on average within an effective measuring range of 1.5 mm. One prototype of proposed sensor was fabricated. The experiments validated that the resonant frequency shifts are linearly proportional to the applied crack width, and the resolution is suitable for crack width measuring.

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.

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.

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