Performance Evaluation of Three Rectangular Patch Element Array Antenna Conformed on Small Radius Cylindrical Surface (original) (raw)
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IRJET, 2023
The microstrip patch antenna required for radio communications to be lightweight, ease in fabrication and smaller in size. The current plan aims to develop a microstrip antenna with a basic geometric shape that can provide improved directivity, gain, and high return loss. The article details the design and analysis of two microstrip antennas, one rectangular and the other square, both of which use microstrip line for feeding. In our Proposed project, the conformal arc array antenna is designed at 2.0-2.4 GHz which provides its usefulness in many wideband utilities within the range of Sband applications. Various parameters such as return loss, radiation pattern, gain, VSWR, directivity, efficiency can be determined. The optimized antenna design and results are presented by using CST (Computer Simulation Technology) software.
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC), 2019
In this paper, circularly polarized aperture coupled rectangular microstrip patch antenna for X-band application is proposed. Whenever planar antenna is conformed to cylindrical surface, antenna characteristics such as circular polarization gets disturbed. Proposed antenna design is printed on polyimide (varepsilonr=3.5)(\varepsilon_{r}=3.5)(varepsilonr=3.5) substrate separated by cross slotted ground plane. The conformal antenna design is simulated in CST microwave studio and is under fabrication.
Comparison between Rectangular and Circular Patch Antennas Array
Modern wireless communication systems require low profile, lightweight, high gain and simple structure antennas to assure reliability, mobility, and high efficiency [1]. A microstrip patch antenna is very simple in construction using a conventional microstrip fabrication technique. Microstrip antennas consist of a patch of metallization on a grounded dielectric substrate. They are low profile, lightweight antennas, most suitable for aerospace and mobile applications. Microstripantennas have matured considerably during the past 40 years, and many of their limitations have been overcome [2]-[6]. The conducting patch can take any shape, but rectangular and circular configurations are the most commonly used configurations. In this paper, several designs of rectangular patchantennas arrays and circular patch antennas arrays are presented. Specifically, 4 by 1, 2 by 1, and single element of both shapes are designed. Moreover, these designs are simulated using IE3d (full wave simulator). Based on the simulation results, comparison between both rectangular and circular patch antennas array is achieved.This paper is divided into fivesections:thefirst section is devoted to give an overview of the microstrip antennas.Second section gives a preface of the important parameters in single element designs, for both rectangular and circular. Third section discusses the patch antenna design and the necessity of the antenna array. Forth section demonstrates the results of the paper as a whole and a comparison between both shapes (rectangular and circular) is presented. Finally, a brief conclusion is presented in the fifth section.
WSEAS Transactions on Communications
In this paper, we propose to study and optimize a new structure of a patch antenna linear array to four identical elements. This array is connected in parallel with a microstrip line in the form « T » having a power port adapted to 50 Ω and intended for Radio Frequency Identification applications. The insertion of slots in the structure of the patch antenna array has a direct and positive impact on improving the radiation characteristics in terms of reflection coefficient, voltage standing wave ratio, input impedance and gain over a frequency range of 2 to 3. The design and optimization have been performed using the simulator HFSS (High Frequency Structure Simulator) based on the finite element method. Next, in order to validate our simulation, we use another electromagnetic simulator CST MWS (Computer Simulation Technology-MicroWaves Studio) which is based on the finite integration method. The simulation results for the four-element linear array show that the reflection coefficient reaches a level of-25.49 , the standing wave ratio is strictly less than 2 and the gain is approximately 14.50 for the same frequency resonance of 2.4 .
Comparative analysis of rectangular and triangular cylindrical microstrip patch antenna
2013
The objective of this paper is to develop a comparative analysis of rectangular and triangular cylindrical microstrip patch antenna. In this study we would like to take into account the problems of resonance and radiation of cylindrical rectangular and triangular microstrip patch antenna. Design procedure involves parameters related to cylindrical microstrip elements to realize the desired resonant frequency, input impedance, radiation patterns etc. Transmission line model is used to calculate the input impedance of the patch, while cavity model is used to calculate its radiation pattern. For a cylindrical-rectangular microstrip antenna, it is observed that the beam-width, resonant frequency, and resonant resistance decrease with cylinder radius. The bandwidth is not sensitive to curvature but it decreases as substrate permittivity increases. Triangular microstrip antennas are a good substitute for rectangular microstrip antennas, especially in microstrip array designs, due to their similar radiation properties and because the triangular patch is physically smaller than the rectangular patch
2016
Conformity of the antenna to the mounting surface is the most essential requirement of modern communication system, whether it be antenna mounted on vehicles or airborne applications primarily due to the aero dynamical advantages of such antennas. In this paper we present the analysis of a inset microstrip line fed patch on cylindrical substrate with electrically small radius of 0.1 times free space wavelength. We try to analyse the effect that the bending has on the resonant frequency, inset length of the feed line of the patch antenna. We present the design dimensions, S11 & Radiation pattern results for the designed conformal patch antenna. KeywordsCylindrical Microstrip Patch Antenna (CMPA), Inset Microstrip Line Feed, Impedance Bandwidth, VSWR, Angular Width.
New Antennas Based on Triangular Patch as a Solution for RFID Application
Applied Computational Electromagnetics Society Journal
This paper covers the design of a new antenna, for RFID applications at microwave frequencies. Five antennas are studied. The first three structures are inspired from a triangular patch, whereas the fourth and the five are inspired from a Sierpenski fractal antenna. The size reduction is more than 80%, which explains the utility of the proposed antennas.
Loop-Shaped Patch Antenna for Conformal Arrays to Minimize the Effects of Adjacent Conducting Skin
Journal of Electrical Engineering & Technology, 2020
This article proposes a novel method of designing a loop-shaped slot patch antenna using an extended cavity structure to reduce the influence of adjacent conducting vehicle skin. The proposed antenna consists of the radiating patch, loop shaped slot, and an extended cavity structure. The radiating patch is directly connected to a hybrid chip coupler to achieve a circular polarization property, and the extended cavity structure is employed to confine the near-field within the radiating patch that allows to have less influence of the conducting skin and to increase the effective permittivity of the proposed antenna. To verify the effectiveness of the proposed conformal array antenna, we fabricate 2 × 2 array antenna with and without an adjacent conducting skin, and its performances, such as bore-sight gains and 2-D radiation patterns are measured in a full anechoic chamber. The results confirm that the proposed antenna structure is suitable for elements of the conformal array, which is less affected by the conducting skin of the airframe.