Characteristics Of Microstrip Patch Antenna Research Articles

An Electronically-Tunable, Flexible, and Transparent Antenna With Unidirectional Radiation Pattern

In this paper, a frequency reconfigurable, conformal, durable, optically transparent, and unidirectional antenna design is demonstrated for the first time. In the demonstrated design, continuous frequency tuning is achieved by integrating a varactor diode in a folded dipole radiator, which is backed by a water-filled reflector to produce unidirectional radiation pattern mimicking the radiation characteristics of microstrip patch antennas. The radiating component of the explored antenna is manufactured from transparent conductive fabric, which has about 72% optical transparency and occupies a small fraction of the entire antenna. The water-filled reflector is located underneath the dipole radiator. Water is contained inside a rectangular box made from flexible-transparent-hydrophobic polymer, polydimethylsiloxane (PDMS). Both water and PDMS are highly transparent, moreover, PDMS has excellent flexibility and water is a liquid, thus, the demonstrated antenna exhibits excellent transparency and durability against physical deformation. The tiny varactor diode integrated in the folded dipole radiator has insignificant effect on the overall transparency and flexibility of the antenna. The explored design has been numerically investigated and experimentally validated through measurements. Measurements show continuous frequency tuning from 2.38 GHz to 2.67 GHz with an average 10-dB return loss bandwidth of about 170 MHz. Moreover, the antenna maintains good front-to-back ratio in the entire operating band.

Materials for Electromagnetic Purpose: The Case of a Microstrip Patch Antenna Characteristics Improvement by Additions of Metals as Spherical Inclusions Into the Substrate

Abstract This paper deals with the design of metamaterial (MTM) substrates to be used in electromagnetic devices. In particular, the approach has been considered for different investigations having the scope the realization of antennas on flexible substrates. The importance of the topic resides in the potential of conforming the antenna to/on desirable shapes. Flexibility is well exploitable either in advanced communication systems or in biomedical applications, just to mention some. The proposed MTM is made of metallic spherical inclusions of AISI52100, which are embedded in a polymer host. The paper aims to assess the feasibility of increasing the performance of a microstrip patch antenna, and to decrease its size by using the MTM substrate, which is able to locally control the permittivity of the substrate and to create electromagnetic band-gap regions outside of the patch.

Study of microstrip patch antenna characteristics with multi-slots etched on 1.6 mm thick epoxy dielectric substrate

A microstrip patch antenna etched with multiple novel slots on widely available epoxy dielectric substrate for wideband applications is designed and studied in the paper. These antennas are designed fabricated experimentally and simulated using Mentor Graphics Integral Equation 3-Dimension (IE3D) software version V 15.4 in order to achieve suitable desired bandwidth with optimized size dimension of the antenna. In addition, characteristics of antenna such as return loss (RL), 2D antenna pattern, −3 dB below Half Power Beam Width (HPBW), reflection co-efficient and VSWR are also studied in detail & presented in this paper. The measured bandwidth of epoxy dielectric substrate microstrip antenna is 124% with −36 dB return loss when the slots are etched on epoxy dielectric substrate material. Proposed antennas achieved good radiation characteristics with VSWR for the proposed antennas were quite below 1.5.

Wearable Inset-Fed FR4 Microstrip Patch Antenna Design

This project proposes the design of a wireless body area network (WBAN) microstrip patch antenna covered by the jeans fabric as the outer layer operating at the center frequency, fc of 2.40 GHz. Precisely, the microstrip patch antenna with the inset-fed edge technique is designed and simulated systematically by using the Keysight Advanced Design System (ADS) software where the FR4 board with the dielectric constant, ϵr of 4.70, dissipation factor or loss tangent, tan δ of 0.02 and height, h of 1.60 mm is the chosen dielectric substrate. The wearable microstrip patch antenna design is then fabricated using the FR4 printed circuit board (PCB) material, hidden inside the jeans fabric, and attached to clothing, such as a jacket accordingly. Simulation and fabrication measurement results show that the designed microstrip patch antenna characteristics can be applied significantly within the industrial, scientific, and medical (ISM) radio band, which is at fc = 2.40 GHz.

Neurospectral computation for the resonant characteristics of microstrip patch antenna printed on uniaxially anisotropic substrates

Modeling and design of rectangular microstrip patch printed on isotropic or anisotropic substrate are accomplished in this paper. The use of spectral domain method in conjunction with artificial neural networks (ANNs) to compute the resonant characteristics of rectangular microstrip patch printed on isotropic or anisotropic substrates. The moment method implemented in the spectral domain offers good accurateness, but its computational cost is high owing to the evaluation of the slowly decaying integrals and the iterative nature of the solution process. The paper introduces the electromagnetic knowledge combined with ANN in the analysis of rectangular microstrip antenna on uniaxially anisotropic substrate to reduce the complexity of the spectral domain method and to minimize the CPU time necessary to obtain the numerical results. The numerical comparison between neurospectral and conventional moment methods shows significant improvements in time convergence and computational cost. Hence, the use of neurospectral approach presented here as a promising fast technique in the design of microstrip antennas.

Investigation of Dual Meander Slot to Microstrip Patch Antenna

A dual microstrip meander slot antenna is presented for Wireless Local Area Network (WLAN) application. The proposed antenna comprises a rectangular microstrip patch element embedded with two meander slots. The parametric study is performed to investigate the characteristics of microstrip patch antenna with double meandered slots compared to one without any meander slot. Microstrip patch antenna with dual meander slot can achieve return loss until -24.54dB. However, the gain of dual meander slot antenna is lower than the rectangular antenna. Other antenna parameters are also has been investigated such as bandwidth, radiation pattern and and directivity throughout simulation and measurement process. The proposed antenna has been designed and simulated by using CST Studio Suite 2010.

Characterization of microstrip patch antennas on metamaterial substrates loaded with complementary split‐ring resonators

AbstractWe present characteristics of microstrip patch antennas on metamaterial substrates loaded with complementary split‐ring resonators (CSRRs). The proposed antenna utilizes CSRRs in the ground plane altering the effective medium parameters of the substrate. To characterize the performance of the CSRR loaded microstrip antenna, the metamaterial substrate has been modeled as an effective medium with extracted constitutive parameters. Simulation results were verified by experimental results. The experimental results confirm that the CSRR loaded patch antenna achieves size reduction as well as bandwidth improvement. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2131–2135, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23596

On the Use of Shorting Pins in the Design of Microstrip Patch Antennas

This paper reviews the use of shorting pins to achieve various performance characteristics of microstrip patch antennas. First, appropriately placed shorting pins can be used to tune the resonant frequencies of a rectangular patch antenna and to control the separation of a dual frequency rectangular patch antenna operating in the TM01 and TM03 modes. Second, shorting pins can be used to significantly reduce the sizes of the various patch antenna designs, including the simple regular patch, the wideband U-slot patch, and the wideband two layer stacked patches. Third, shorting pins are effective in widening the bandwidths of both the quarter wave patch and the regular patch. Both simulation and experimental results are presented and/or referenced.

Radiated fields of microstrip patches at arbitrary angular positions

This article investigates the radiation characteristics of microstrip patch antennas located at arbitrary angular positions. The aperture method was employed to determine the radiated far field of the patch. A circular arrangement of the patch antennas was studied. The effect of the array configuration on the radiation characteristics are presented and analyzed.