Microstrip antennas for wireless communication in smart structures and active damping

1997 ◽  
Author(s):  
Farshad Khorrami ◽  
Nirod K. Das ◽  
Said Nourbakhsh
Keyword(s):  
Wireless Communication ◽  
Smart Structures ◽  
Microstrip Antennas ◽  
Active Damping

ANALYSIS PERFORMANCE OF SINGLY-FED CIRCULARLY POLARIZED MICROSTRIP ANTENNA FOR WIRELESS COMMUNICATION

2016 ◽  
Vol 78 (5-9) ◽  
Author(s):  
Muhammad Fauzan Edy Purnomo ◽  
Hadi Suyono ◽  
Panca Mudjirahardjo ◽  
Rini Nur Hasanah
Keyword(s):  
Wireless Communication ◽  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Microstrip Antennas ◽  
Impedance Bandwidth ◽  
Antenna Structure ◽  
Circularly Polarized ◽  
Large Bandwidth ◽  
Doubly Fed

The circularly polarized (CP) microstrip antennas, both of singly- and doubly-fed types, possess inherent limitation in gain, impedance and axial-ratio bandwidths. These limitations are caused mainly by the natural resonance of the patch antenna which has a high unloaded Q-factor and the frequency-dependent excitation of two degenerative modes (TM01 and TM10) when using a single feed. Many applications which require circular polarization, large bandwidth, and good performance, especially in the field of wireless communication, are still difficult to be designed by using antenna software. Some consideration to take will include the application target and design specification, the materials to be used, and the method to choose (formula, numerical analysis, etc). This paper explains and analyzes the singly-fed microstrip antenna with circular polarization and large bandwidth. This singly-fed type of microstrip antenna provides certain advantage of requiring no external circular polarizer, e.g. the 900 hybrid, as it only needs to apply some perturbation or modification to a patch radiator with a standard geometry. The design of CP and large-bandwidth microstrip antenna is done gradually, by firstly truncating one tip, then truncating the whole three tips, and finally modifying it into a pentagonal patch structure and adding an air-gap to obtain larger bandwidths of impedance, gain and axial ratio. The last one antenna structure results in a novelty because it is a rare design of antenna which includes all types of bandwidth (impedance, gain, and axial ratio) being simultaneously larger than the origin antenna. The resulted characteristic performance of the 1-tip (one-tip) antenna shows respectively 1.9% of impedance bandwidth, 3.1% of gain bandwidth, and 0.45% of axial-ratio bandwidth. For the 3-tip (three-tip) step, the resulted bandwidths of respectively impedance, gain, and axial ratio are 1.7%, 3.3% and 0.5%. The pentagonal structure resulted in the bandwith values of 15.67%, 52.16% and 4.11% respectively for impedance, gain, and axial ratio. 

scholarly journals Review: Dual Band Microstrip Antennas for Wireless Applications

2018 ◽  
Vol 7 (2) ◽  
pp. 143
Author(s):  
Rakesh Kumar Bajpai ◽  
Rajeev Paulus ◽  
Ashish Singh ◽  
Mohammad Aneesh
Keyword(s):  
Wireless Communication ◽  
Microstrip Antennas ◽  
Dual Band ◽  
Geometric Structures ◽  
Wireless Applications ◽  
Methods Of Analysis ◽  
Different Types ◽  
Antenna Characteristics

<span lang="EN-US">In this manuscript, a review of dual band microstrip antennas for wireless communication is presented</span><span lang="EN-GB">. This review manuscript discusses regarding the geometric structures, different methods of analysis for antenna characteristics, and different types of wireless applications.</span>

scholarly journals Metamaterial superstrate microstrip patch antenna for 5G wireless communication based on the theory of characteristic modes

2019 ◽  
Vol 70 (3) ◽  
pp. 187-197
Author(s):  
Ehab K. I. Hamad ◽  
Ahmed Abdelaziz
Keyword(s):  
Wireless Communication ◽  
Patch Antenna ◽  
Split Ring Resonator ◽  
Microstrip Antennas ◽  
Unit Cell ◽  
Dual Band ◽  
Mode Analysis ◽  
Electromagnetic Properties ◽  
Characteristic Mode ◽  
Antenna Structure

Abstract Metamaterials (MTMs) have received considerable attention due to their novel electromagnetic properties. Their applications include enhancing gain and bandwidth in microstrip antennas. In this article, a dual band microstrip antenna design based on characteristic mode analysis (CMA) using MTM superstrate is proposed for 5G wireless communication. The CMA is used for the modelling, analysis and optimization of the proposed antenna to examine the underlying modal behaviour of the MTM unit cell and to guide mode excitation. The antenna structure consists of a microstrip feed line connected to a rectangular patch. Then triangular split ring resonator unit cell is inserted on the ground of a traditional patch antenna that resonates at 15 GHz to produce additional resonance at 10 GHz. A planar array of 2 × 3 triangle MTM unit cells is used as superstrate to improve the gain and bandwidth at both resonances simultaneously. The optimal distance between MTM superstrate and the antenna patch is determined using the Fabry-Perot cavity theory to maximize power directivity and efficiency of the proposed antenna. The CST microwave studio software is used to model and optimize the proposed antenna. A prototype of the designed antenna that was fabricated showed good agreement between measurement and simulation results.

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