A new compact design and comparative study of circular patch antenna with different conditions of operations (original) (raw)
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Design of a Compact Circular Microstrip Patch Antenna for WLAN Applications
International Journal on AdHoc Networking Systems, 2021
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Design of Compact Microstrip Patch Antenna for Wireless Applications
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2011
A probe-fed, slotted rectangular patch antenna has been proposed. Bandwidth enhancement has been achieved by suitably cutting slots into the rectangular patch, and efficiently exciting the slot by short circuiting the conducting patch through the dielectric substrate beyond the edge of the slot. Proposed antenna is suitable for various ground based and airborne applications in C-Band. It is demonstrated that the proposed antenna exhibits three resonances in C-Band and a peak gain of 7 dBi. The antenna structure is described and simulation results are presented. In rapidly expanding market for wireless communication and applications, microstrip antenna has become widely popular as it is low profile, conformable to the hosting surfaces, light weight and can be easily integrated with the electronic system. Microstrip antennas are widely used in military, radar systems, mobile communications, global positioning system (GPS), remote sensing etc. Taking benefit of the added processing pow...
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In this paper, three different compact circular ring microstrip patch antenna structures have been proposed. These antennas have been analyzed, investigated and optimized using the CST-MW-simulator. The proposed designs are mainly based on the concept of patch shape reconfiguration while its overall dimensions are kept constant. The objective is to design dual and/or triple broadband antennas resonate within the fourth generation band (4G). The presented antennas are simulated and fabricated on cheaper and lossy FR-4 substrate, and their parameters are measured and compared. The obtained results show that the proposed antenna structures resonate within the 4G frequency band. The operating bandwidths have been varied between 270.0 MHz and 1000.0 MHz (about 4% up to 7% of center frequency). In addition, maximum VSWR value of less than 1.5 has been achieved. The obtained results verify the validity and the benefits of reconfiguring the patch shape. Finally, good agreement has been obtained between simulated and measured parameters.
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Microwave and Optical Technology Letters, 2008
A broadband microstrip patch antenna with U-shaped parasitic elements is proposed and analyzed using equivalent circuit theory concept. The effects of gap between the main patch and the U-shaped parasitic elements, substrate thickness, and the feed point location are analyzed to obtain the optimum conditions for broadband operation of the antenna. The antenna shows an operational frequency band from 4.88 to 6.44 GHz with 28.36% bandwidth at center frequency 5.5 GHz. The radiation patterns of the proposed antenna are similar to that of a rectangular patch. The antenna shows 3-dB beam width of 98.6° at lower resonance frequency whereas it is 77.6° at higher resonance frequency. The theoretical results are in good agreement with experimental results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2059–2063, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23573
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Generally the WLAN standard defines two frequency ranges one for the Lower (2.4-2.48GHz) and the other for the Upper (4.9- 6 GHz). In Wi-Fi, the coverage for lower and upper is specified as 2.4-2.48 GHz and 5.15-5.8GHz respectively. Commercially for Wireless LAN two separate Ethernet port adapters are currently utilized in many places– one for the 2.4 GHz band and for the 5.5 GHz band. These adapters use two different antennas for their operations. In this paper, a modified slotted microstrip antenna resonating at 2.4GHz, 5GHz and 5.5 GHz is proposed. This antenna is found to provide improved performance in terms of lower return loss and higher gain when compared to the conventional one. The antenna has been designed and simulated using ANSOFT HFSS EM simulator. It makes use of FR4 as substrate with dimensions 50mm x 40mm x 1.6mm and the antenna pattern is printed on it using copper. The outer radius of the circular microstrip antenna is 17mm. The circular antenna resonates at 2.4GHz and the rectangular antenna kept inside this circular antenna resonates at 5.5GHz. Additionally the circular-rectangular combination results in the resonance possibility with a third frequency at 5GHz also. This modified single patch antenna is analyzed in terms of resonance, bandwidth, VSWR, radiation pattern, gain and directivity
THE CIRCULAR MICROSTRIP PATCH ANTENNA – DESIGN AND IMPLEMENTATION
A FORTRAN program was developed to simulate the basic parameters of a microwave circular patch antenna. These parameters are the actual radius of patch, effective radius of patch, conductance due to radiation, conductance due to conduction, conductance due to dielectric loss, directivity, input resistance and quality factors due to conduction, dielectric loss, and radiation. Alongside, these parameters were manually computed. Four substrates were selected -Galium Arsenide, Duroid, Indium Phosphide and Silicon. Deductions made from the results showed that Galium Arsenide is suitable when smaller antenna size and low power handling capability is apriori. However, when size is not a constraint, Duroid is exceptional especially in directivity and high power radiation. Patch radius decreases as the resonant frequency increases (0.2374cm at 10.0GHz and 0.05079 cm at 45.0GHz for GaAs). The results obtained in this design compare favorably with results obtained from manual computation of the same parameters and these agree with other designs such as the rectangular patch.