Inkjet-Printed Wideband Circularly Polarized Microstrip Patch Array Antenna on a PET Film Flexible Substrate Material

This paper presents a short microstrip patch antenna and analyzes its characteristics in simulation and measured ways. The proposed antenna is meant to be used from 2.4 to 2.5 GHz at the resonant frequency of 2.45 GHz Industrial, Science, and Medical (ISM) spectrum. Besides, insert a diagonal slot in the main patch, and two cutting edges with V-slit gives the antenna to propagate a circular polarization pattern. The paper aims to start learning a simple C.P. patch antenna supported the basic concept of microstrip antenna theory. A single-feed C.P., truncated corners, and slit and slot methods are employed to model the antenna apart from its parametric study. The substrate material of the developed antenna is FR-4, and it's a relative permittivity of 4.4. The antenna incorporates a compact overall size of 0.389λ0 × 0.389λ0 × 0.013λ0, where λ0 is that the corresponding free-space wavelength at 2.45 GHz. FEKO has been used for not only designing the antenna model but also analyzing its performances. Simulated and measured results have reported that the antenna can work in ISM bands (2.42-2.5 GHz) with VSWR< 2, low realized gain, and the limited 3-dB axial ratio at 2.45 GHz.

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2 × 1 Circularly Polarized Rectangular Microstrip Patch Array Antenna

Lecture Notes in Electrical Engineering - Proceedings of the 12th National Technical Seminar on Unmanned System Technology 2020 ◽

10.1007/978-981-16-2406-3_54 ◽

2021 ◽

pp. 701-709

Author(s):

Nurasma Husna Mohd Sabri ◽

Mohd Aminudin Jamlos ◽

Lee Yeng Seng

Keyword(s):

Array Antenna ◽

Circularly Polarized ◽

Microstrip Patch

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Miniature Circularly Polarized Microstrip Patch Antenna with Rectangular Slots for GPS Application

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.148-149.149 ◽

2011 ◽

Vol 148-149 ◽

pp. 149-152

Author(s):

Zhong Liang Deng ◽

Man Zu Hong ◽

Yi Dong Yao

Keyword(s):

Patch Antenna ◽

Substrate Material ◽

Microstrip Patch Antenna ◽

Antenna Structure ◽

Circularly Polarized ◽

Microstrip Patch ◽

Ansoft Hfss ◽

Lower Left Corner ◽

Left Corner ◽

Very High

A miniature circularly polarized (CP) microstrip patch antenna with rectangular slots for GPS application is presented. The antenna structure is composed of a square radiating patch and two rectangular slots. The two rectangular slots are incorporated to obtain CP characteristic, with one slot on the lower left corner of the square patch and the other on the upper right corner. By adjusting the dimensions and positions of the slots, the proposed antenna can exhibit CP radiation. Moreover, miniature properties are achieved by the use of very high permittivity substrate material. Simulated results by Ansoft HFSS are given.

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A 2.45 GHz Semi-Flexible wearable antenna for industrial, scientific and medical band applications

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v15.i2.pp814-822 ◽

2019 ◽

Vol 15 (2) ◽

pp. 814

Author(s):

S. M. Shah ◽

N. F. A. Kadir ◽

Z. Z. Abidin ◽

F. C. Seman ◽

S. A. Hamzah ◽

...

Keyword(s):

Flexible Substrate ◽

Relative Dielectric Constant ◽

Input Power ◽

Substrate Material ◽

Wearable Antenna ◽

Microstrip Patch ◽

Low Profile ◽

Compact Size ◽

Human Arm ◽

Tan Δ

<span>In this work, a compact size, wearable microstrip patch antenna is designed, simulated and fabricated for the Industrial, Scientific and Medical (ISM) band applications with the operating frequency at 2.45 GHz. A semi-flexible substrate material which is Rogers Duroid RO3003™ with a relative dielectric constant, ε_r of 3, loss tangent, tan δ of 0.010 and thickness, h of 1.52 mm has been proposed to ensure it can be worn on clothes. The antenna has a low-profile feature with 24 × 28 mm2 in dimension. Investigation of the antenna under bending condition on the approximate human arm size is also performed and analysed to ensure that the wearable antenna is applicable for on-body. The bending investigation shows that the initial resonant frequency of 2.45 GHz is shifted to 2.3 GHz. However, the reflection coefficient at 2.45 GHz is still greater than the -10-dB which implies that the antenna is still functional at that particular frequency. The Specific Absorption Rate (SAR) of the antenna has also been simulated to examine whether the antenna obeys the SAR limits under the FCC and CNIRP guidelines. The SAR values obtained show that the antenna obeys the standard for 1 mW input power. The SAR value for 1g of human tissue is computed at 0.03999 W/kg (FCC standard: 1.6 W/kg) while for 10g is at 0.01936W/kg (CNIRP standard: 2 W/kg).</span>

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Design and Simulation of Metamaterial based Circularly Polarized Antenna Array

Journal of University of Shanghai for Science and Technology ◽

10.51201/jusst/21/08417 ◽

2021 ◽

Vol 23 (08) ◽

pp. 437-442

Author(s):

Rohini G.Bhatkoorse ◽

◽

Dr. Mahesh A ◽

Keyword(s):

Resonant Frequency ◽

Mutual Coupling ◽

Coupling Effect ◽

Array Antenna ◽

Negative Permittivity ◽

Metamaterial Structure ◽

Circularly Polarized ◽

Microstrip Patch ◽

Planar Shape ◽

Permittivity And Permeability

The microstrip patch array antenna is usually designed as a broadside radiator. The radiating area of the patch can be of any planar shape from elliptical to square, but rectangular is preferred over other shapes. When elements of antenna are repeated, it is called as an array of antennas. When the distance between antennas is reduced, mutual coupling effect occurs. This effect occurs when the distance between the antennas is less than 0.5and this affects the gain and efficiency of the antennas. This effect can be reduced by using metamaterials. To reduce the mutual coupling between the antenna elements the metamaterial structure is artificially designed to obtain negative permittivity and permeability using HFSS and the results are verified using MATLAB. These metamaterials are placed between the patch elements of 1×2 circularly polarized array antenna when the distance between the patches is 0.2 for both RT duroid and FR4 epoxy substrate for 5GHz resonant frequency.

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