The Design of Ceramic Minkowski Fractal Antenna

2014 ◽  
Vol 1006-1007 ◽  
pp. 1010-1013
Author(s):  
Xiu Bin Ye ◽  
Guo Peng Kou ◽  
Yi Juan Ji
Keyword(s):  
Microstrip Antenna ◽  
High Performance ◽  
Fractal Structure ◽  
Fractal Antenna ◽  
Test Results ◽  
Antenna Performance ◽  
Rfid System ◽  
Ground Plate ◽  
Rfid Applications ◽  
Minkowski Fractal

Antennas play an important role in RFID system. As one of the key technology of RFID, the antenna design decides the RFID system performance. This paper designed a ceramic Minkowski fractal antenna used in RFID system. It used Minkowski fractal structure as the radiation patch and the high performance ceramic material to reduce the antenna size, then improve it with rectangular joint structure in the antenna's ground plate. In this paper, the antenna performance are analyzed in the simulation, In this paper, the antenna performance are analyzed in the simulation, it discussed the thickness of the medium plate and the effect of dielectric constant on the performance of microstrip antenna, finally make antenna samples for testing. The simulation and test results show the antenna designed meet the requirement of RFID applications.

Circularly polarized square slot microstrip antenna for RFID applications

2015 ◽  
Vol 8 (8) ◽  
pp. 1237-1242 ◽  
Author(s):  
Neha Sharma ◽  
Anil Kumar Gautam ◽  
Binod Kumar Kanaujia
Keyword(s):  
Radio Frequency Identification ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Slot Antenna ◽  
Circularly Polarized ◽  
Broad Bandwidth ◽  
Antenna Performance ◽  
Frequency Identification ◽  
Rfid Applications ◽  
Good Agreement

In this paper, a novel circularly polarized square slot microstrip antenna is proposed for radio frequency identification (RFID) applications. The circular polarization is achieved by incorporating an arc-shaped strip in the square slot antenna. This antenna is fed by deformed bent feeding line to achieve a broad bandwidth (BW). The key parameters of the antenna are used for parametric study to understand the influence on the antenna performance. To validate simulation results of the design, a prototype is fabricated on the commercially available FR4 material. Measured results show a good agreement with the simulated results. It is found that the antenna shows an impedance BW of 170 MHz (844–1014 MHz) and axial-ratio BW of 170 MHz (834–1004 MHz), which shows that the proposed antenna is a good candidate to be used as a RFID antenna.

scholarly journals Design of Window Grille Shape-Based Multiband Antenna for Mobile Terminals

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Zhen Yu ◽  
Yao Li ◽  
Ziheng Lin ◽  
Xiaoying Ran
Keyword(s):  
Microstrip Antenna ◽  
Mobile Terminal ◽  
Simulation Software ◽  
Navigation Systems ◽  
Test Results ◽  
Effective Current ◽  
Current Path ◽  
Plate Shape ◽  
Feed Mode ◽  
Ground Plate

Combined with the classic Chinese window grille structure, this paper proposes and designs a multiband microstrip antenna that can be used in wireless mobile terminal equipment. The antenna radiator adopts a rectangular bending structure with four loops, which increases the effective current path of the antenna radiator in a limited space, so that the overall antenna is miniaturized. The branch structure of the four-ring phase set increases the current path of the antenna, making the antenna multiband. The electromagnetic simulation software HFSS was used for antenna modeling and parameter optimization, and the influence of the feed structure, feed mode, and ground plate shape on the antenna was compared and analyzed. The test results show that the antenna can cover four bands, 0.85–1.1 GHz, 1.2–1.8 GHz, 2.40–2.7 GHz, and 5.05–6.3 GHz, and produce 6 main frequency points, 0.9 GHz, 1.3 GHz, 1.6 GHz, 2.55 GHz, 5.3 GHz, and 6.05 GHz. The antenna can cover various navigation systems, Bluetooth, WLAN, ISM frequency band, and 5G (5.725–5.825 GHz).

Microstrip antenna miniaturization with fractal EBG and SRR loads for linear and circular polarizations

2016 ◽  
Vol 9 (4) ◽  
pp. 891-901 ◽  
Author(s):  
Mohammad Sadegh Sedghi ◽  
Mohammad Naser-Moghadasi ◽  
Ferdows B. Zarrabi
Keyword(s):  
Microstrip Antenna ◽  
Fractal Structure ◽  
Split Ring Resonator ◽  
Effective Length ◽  
Slot Antenna ◽  
Fractal Method ◽  
Unit Cells ◽  
Wireless Application ◽  
Band Characteristic ◽  
Minkowski Fractal

In this paper, combination of electromagnetic band gap (EBG) and split-ring resonator (SRR) loads with fractal formation for miniaturization of microstrip antenna is noticed. Here two different shapes of antenna have been studied with two well-known metamaterial structures as parasitic elements. A conventional microstrip antenna, which is surrounded by four EBG unit cells, is chosen as the first antenna. It has an effective resonance at 2.5. The Minkowski fractal method is applied to EBG unit cells in this stage. The Minkowski fractal structure is implemented for accession of effective capacitance in EBG unit cells. The second antenna frequencies are 2.5 and 5.9 GHz. It contains a slot structure with four SRRs, used for making parasitic elements and for achieving multi-band characteristic. The fractal method is used to improve the inductance of SRR structure by increasing the effective length of microstrip line. At this stage, the applied fractal structure has been modified, so that the frequency of wireless application could be achieved. In the last step, by some changes in feed line of the slot antenna, circular polarization (CP) is obtained for the second antenna, which shows that SRR load can be helpful for making the CP.

Design of Miniaturized Antenna for RFID Applications

2019 ◽  
pp. 325-362 ◽  
Author(s):  
Mohamed Ihamji ◽  
Elhassane Abdelmounim ◽  
Hamid Bennis ◽  
Mohamed Latrach
Keyword(s):  
Microstrip Antenna ◽  
Good Choice ◽  
Rfid System ◽  
Low Profile ◽  
Low Weight ◽  
Compact Size ◽  
Miniaturized Antenna ◽  
Miniature Antenna ◽  
Rfid Antennas ◽  
Rfid Applications

This chapter presents the design of some miniature antenna for RFID application, in the ISM (industrial, scientific, and medical) band at 915 MHz and 2.45 GHz, by using two techniques. The first technique is the use of slots inserted into the microstrip antenna, and the second technique is the use of the fractal structure. In the end, both techniques are used together in one structure to get the benefit of each technique at the same time. These antennas are designed for RFID system. They can be used in a variety of fields such as access control, transport, banks, health, and logistics. One major consideration for handheld and portable RFID system applications is the compact size. Therefore, the design of miniature RFID antennas is important, and the microstrip antenna is a good choice because they are known to be low-profile, low weight, easy to make, and mechanically robust.

scholarly journals A Broadband Left-Handed Metamaterial Microstrip Antenna with Double-Fractal Layers

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Roman Kubacki ◽  
Salim Lamari ◽  
Mirosław Czyżewski ◽  
Dariusz Laskowski
Keyword(s):  
Microstrip Antenna ◽  
Fractal Structure ◽  
Microstrip Patch Antenna ◽  
Frequency Range ◽  
Radiation Characteristics ◽  
Average Value ◽  
Microstrip Patch ◽  
Antenna Performance ◽  
Left Handed ◽  
Improved Characteristics

This paper proposes a microstrip patch antenna based on the left-handed metamaterial concept, using planar periodic geometry, which results in improved characteristics. This periodic geometry is derived from fractal shapes, which have been widely used in antenna engineering. The metamaterial property was obtained as a result of the double-fractal structure on both the upper and the bottom sides of the antenna. The final structure has been optimized to enhance bandwidth, gain, and radiation characteristics of the microstrip antenna. This combination significantly improved antenna performance; our design could support an ultrawide bandwidth ranging from 4.1 to 19.4 GHz, demonstrating higher gain with an average value of 6 dBi over the frequency range and a peak of 10.9 dBi and a radiation capability directed in the horizontal plane of the antenna.

scholarly journals Modified Dual-Band Stacked Circularly Polarized Microstrip Antenna

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Guo Liu ◽  
Liang Xu ◽  
Yi Wang
Keyword(s):  
Radiation Pattern ◽  
Global Positioning System ◽  
Microstrip Antenna ◽  
High Performance ◽  
Axial Ratio ◽  
Dual Band ◽  
Optimized Design ◽  
Positioning System ◽  
Circularly Polarized ◽  
Global Positioning

A novel high-performance circularly polarized (CP) antenna is proposed in this paper. Two separate antennas featuring the global positioning system (GPS) dual-band operation (1.575 GHz and 1.227 GHz for L1 band and L2 band, resp.) are integrated with good isolation. To enhance the gain at low angle, a new structure of patch and two parasitic metal elements are introduced. With the optimized design, good axial ratio and near-hemispherical radiation pattern are obtained.

Dual-layered polarization and frequency reconfigurable microstrip antenna by rotating breach-truncated circular radiator

2017 ◽  
Vol 9 (8) ◽  
pp. 1705-1712
Author(s):  
Haixiong Li ◽  
Yunlong Gong ◽  
Jiakai Zhang ◽  
Jun Ding ◽  
Chenjiang Guo
Keyword(s):  
Reflection Coefficient ◽  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Axial Rotation ◽  
Polarization Characteristic ◽  
The Novel ◽  
Test Results ◽  
Left Handed ◽  
Mechanical Rotation

In this study, a dual-layered polarization and frequency reconfigurable microstrip antenna is proposed based on sequential mechanical axial rotation of the circular metal radiator. The antenna can be reconfigured among three different polarized modes, including the linear polarization (LP), left-handed circular polarization and right-handed circular polarization in the band from 4.68 to 4.80 GHz (2.53%). The resonance frequency of the proposed antenna with the same LP mode could also be tuned in the range from 4.70 to 5.03 GHz by mechanical rotation of the breach-truncated circular metal radiator as well as the circular substrate. Furthermore, the polarization characteristic and frequency can be reconfigured, respectively, as the circular radiator is taken an axial rotation with an angle of 360°. The presented antenna in the four different states has been numerically simulated and fabricated for the experimental measurement, the investigated characteristics includes the port reflection coefficient, axial ratio, radiation pattern, gain, and the radiation efficiency. The simulated and test results agreed well with each other. This antenna enriches the novel mechanical reconfigurable method except for the popular electrical approach.

Magneto‐dielectric substrate‐based microstrip antenna for RFID applications

2017 ◽  
Vol 11 (10) ◽  
pp. 1389-1392 ◽  
Author(s):  
Jamal Zaid ◽  
Mohammadmahdi Farahani ◽  
Tayeb A. Denidni
Keyword(s):  
Microstrip Antenna ◽  
Dielectric Substrate ◽  
Rfid Applications

scholarly journals Microstrip patch antenna with metamaterial using superstrate technique for wireless communication

2021 ◽  
Vol 10 (4) ◽  
pp. 2055-2061
Author(s):  
Rasha Mahdi Salih ◽  
Ali Khalid Jassim
Keyword(s):  
Wireless Communications ◽  
Reflection Coefficient ◽  
Wireless Communication ◽  
Patch Antenna ◽  
Relative Permittivity ◽  
Microstrip Antenna ◽  
Microstrip Patch Antenna ◽  
Antenna Gain ◽  
Microstrip Patch ◽  
Antenna Performance

This work builds a metamaterial (MTM) superstrate loaded on a patch of microstrip antenna for wireless communications. The MTM superstrate is made up of four G-shaped resonators on FR-4 substrate with a relative permittivity of 4.4 and has a total area of (8×16) mm2, and is higher than the patch. The MTM superstrate increases antenna gain while also raising the input reflection coefficient. When it is 9 mm above the patch, the gain increased from 3.28 dB to 6.02 dB, and when it is 7 mm above the patch, the input reflection coefficient was enhanced from -31.217 dB to -45.8 dB. When the MTM superstrate loaded antenna was compared to the traditional unloaded antenna, it was discovered that metamaterials have a lot of potential for improving antenna performance.

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