Compact Dual-Band Monopole Antenna for Wi-Fi Portable Devices

2013 ◽  
Vol 421 ◽  
pp. 168-172
Author(s):  
Tsang Yen Hsieh ◽  
Jyh Liang Wang
Keyword(s):  
Wireless Communications ◽  
Reflection Loss ◽  
Return Loss ◽  
Rapid Development ◽  
Simulation Software ◽  
Dual Band ◽  
Portable Devices ◽  
Dual Frequency ◽  
Efficiency And Effectiveness ◽  
Communications Services

With the rapid development of the wireless communications, the quality of wireless communications services are increasingly improved, which makes people to pay more attention to efficiency and effectiveness of wireless communication system. Recently, some popular portable devices are those defined by 802.11b, 802.11g and 802.11n protocols, such as Wi-Fi card, Wi-Fi card reader and Wi-Fi hard disk. A dual frequency WLAN antenna used for applications of Wi-Fi portable devices is necessary. The reflection loss (Return Loss) of the antenna is a key parameter, therefore, the antenna return loss and bandwidth must meet the conditions of requirements. We use electromagnetic simulation software to simulate and tune the reflection loss of the antenna to more than 10 dB specification. According to the parameters of simulation results, a dual frequency WLAN antenna used for applications of Wi-Fi portable devices is fabricated.

A Novel Dual-Band Tag Antenna for RFID Application

2013 ◽  
Vol 427-429 ◽  
pp. 1289-1292
Author(s):  
Yan Zhong Yu ◽  
Hua Nan Yang ◽  
Zhong Yi Huang
Keyword(s):  
Radio Frequency Identification ◽  
Rapid Development ◽  
High Gain ◽  
Dual Band ◽  
Dual Frequency ◽  
Rfid Tag ◽  
Microstrip Patch ◽  
Frequency Identification ◽  
Design Requirements ◽  
Simulation Results

With the rapid development of RFID (radio frequency identification) application, the design requirements of RFID tag antenna are also increasing. A design of dual-frequency or multi-frequency tag antenna has become fashionable. In the present paper, we design a dual-band RFID tag antenna, which consists of a bent microstrip patch and rectangular microstrip patch. The designed antenna is analyzed and optimized by HFSS13. Simulation results indicate that the tag antenna has the characteristics of double band, high gain, and good radiation pattern.

scholarly journals Design of a Dual Band Coplanar Antenna for WiMax Applications

2018 ◽  
Vol 7 (3.32) ◽  
pp. 11
Author(s):  
Wen Cheng Lai ◽  
Lin Chuan Tsai ◽  
Chia Wen Li
Keyword(s):  
High Frequency ◽  
Return Loss ◽  
Simulation Software ◽  
Circuit Board ◽  
Antenna Design ◽  
Dual Band ◽  
Electromagnetic Simulation ◽  
Continuous Simulation ◽  
Ansoft Hfss ◽  
Measurement Results

Ansoft HFSS electromagnetic simulation software was used in this study to simulate the design of two frequency band dual band coplanar antennas for WiMax (3.44GHz to 3.69GHz) and (5.25GHz to 5.85GHz) with center frequencies of 3.5GHz and 5.25GHz respectively. The steps of antenna design simulation are shown in figures of Return Loss, Current Distribution and 3D Radiation Pattern. Through continuous simulation, modification, and correction, the antenna can achieve the desired effect. Metal was used as the reflective material for the antenna designed, the antenna was covered by the material as a partition between the antenna and the metal, and FR4 was used as high-frequency circuit board (dielectric coefficient = 4.4). The simulation and measurement results were found to have consistent and good characteristics.  

Design of Dual Frequency Stacked Patch Antenna for L Band Applications

2019 ◽  
Vol 9 (1S5) ◽  
pp. 55-57
Keyword(s):  
Finite Element Method ◽  
Dielectric Constant ◽  
Finite Element ◽  
Patch Antenna ◽  
Return Loss ◽  
Dual Band ◽  
Dual Frequency ◽  
Band Frequency ◽  
L Band ◽  
Stacked Patch Antenna

This article presents a thorough explanation on stacked patch antenna (SPA) for dual frequency applications. The strip antenna operates in L-Band at 1.34GHz and 1.579 GHz. The SPA designed and simulated on a Rogers RT Duroid 5880 substrate using dielectric constant of 2.2 and depth of 3.77mm for each layer. In Finite Element Method the proposed design is based Ansys electromagnetic suit (HFSS version 19.1.0), the proposed antenna simulated results provides good performance for dual band frequency applications in term of return loss and radiation pattern for dual frequency applications.

scholarly journals A Millimeter Wave Antenna using Slots for Defense Applications

2018 ◽  
Vol 7 (2.11) ◽  
pp. 36
Author(s):  
Deepa Negi ◽  
Rajesh Khanna
Keyword(s):  
Millimeter Wave ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Simulation Software ◽  
Dual Band ◽  
Strip Line ◽  
Wave Antenna ◽  
Feeding Technique ◽  
Millimeter Wave Antenna ◽  
Simulation Results

In this paper, a rectangular dual band millimeter wave (MMW) microstrip antenna using U and circular slot is designed for defense applications. The antenna operates in the (57-64) GHz unlicensed frequency band. The proposed antenna is designed using RT/duroid substrate having dielectric constant 2.3, thickness 0.04mm and strip line feeding technique. The proposed antenna results are simulated and optimized using Computer Simulation Technology (CST) simulation software. The maximum return loss achieved is -15dB and -25.45 dB respectively for both U and circular slot. Simulation results show that the antenna having circular slot gave better results. The antenna simulation results such as return loss, gain and directivity are presented in this paper. 

scholarly journals A Novel Dual-Band (38/60 GHz) Patch Antenna for 5G Mobile Handsets

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2541 ◽  
Author(s):  
Marwa H. Sharaf ◽  
Amira I. Zaki ◽  
Radwa K. Hamad ◽  
Mohamed M. M. Omar
Keyword(s):  
Mobile Communications ◽  
Patch Antenna ◽  
Return Loss ◽  
Mimo System ◽  
Multiple Input Multiple Output ◽  
Dual Band ◽  
60 Ghz ◽  
Dual Frequency ◽  
Radiation Patterns ◽  
Radiation Mechanisms

A compact dual-frequency ( 38 / 60   GHz ) microstrip patch antenna with novel design is proposed for 5G mobile handsets to combine complicated radiation mechanisms for dual-band operation. The proposed antenna is composed of two electromagnetically coupled patches. The first patch is directly fed by a microstrip line and is mainly responsible for radiation in the lower band ( 38   GHz ). The second patch is fed through both capacitive and inductive coupling to the first patch and is mainly responsible for radiation in the upper frequency band ( 60   GHz ). Numerical and experimental results show good performance regarding return loss, bandwidth, radiation patterns, radiation efficiency, and gain. The impedance matching bandwidths achieved in the 38   GHz and 60   GHz bands are about 2   GHz and 3.2   GHz , respectively. The minimum value of the return loss is − 42 dB for the 38   GHz band and − 47 for the 60   GHz band. Radiation patterns are omnidirectional with a balloon-like shape for both bands, which makes the proposed single antenna an excellent candidate for a multiple-input multiple-output (MIMO) system constructed from a number of properly allocated elements for 5G mobile communications with excellent diversity schemes. Numerical comparisons show that the proposed antenna is superior to other published designs.

scholarly journals Dual Band Gap Coupled Patch Antenna for Wireless Communications

2017 ◽  
Vol 16 (1) ◽  
pp. 39-45
Author(s):  
Akhilesh Kumar Pandey ◽  
Rajeev Singh
Keyword(s):  
Patch Antenna ◽  
Circuit Theory ◽  
Microstrip Patch Antenna ◽  
Simulation Software ◽  
Dual Band ◽  
Dual Frequency ◽  
Microstrip Patch ◽  
Experimental Values ◽  
Theoretical Results ◽  
Gap Coupled Patch Antenna

A dual frequency resonance antenna is proposed by means of a rectangular microstrip patch antenna with parasitic elements. Analysis is made using concepts of circuit theory and the measured and theoretical results are compared with simulation results obtained with IE3D simulation software. Error between experimental and theoretical and simulated values is within 1.5% and frequency ratio of the simulated, theoretical and experimental values is found to be 2.0

Design of Dual-Frequency Microstrip Patch Antenna

2012 ◽  
Vol 516-517 ◽  
pp. 1594-1598
Author(s):  
Jun Xiu Yang ◽  
Lin Li ◽  
Wen Lai Zhao
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Reference Value ◽  
Coaxial Line ◽  
Microstrip Patch Antenna ◽  
Simulation Software ◽  
Dual Frequency ◽  
Location Selection ◽  
Microstrip Patch ◽  
Selection Of

A dual-frequency microstrip patch antenna is proposed based on rectangular microstrip patch, with appropriating feed location selection of 50Ω coaxial line, two frequency are respectively applied to 0.8GHz and 0.9GHz. Size of antenna is designed based on the simulation software of HFSS from ANSOFT company, reducing antenna return loss by adjusting size and completing matching between patch and coaxial line, results are analyzed. Simulation results show the design and implementation of microstrip patch antenna have certain reference value with small return loss on 0.8GHz and 0.9GHz.

scholarly journals Dual-band Rectangular Microstrip Patch Antenna for WiMAX Wireless Communications by Chemical Method

2021 ◽  
Vol 2114 (1) ◽  
pp. 012022
Author(s):  
Ali H. Khidhir
Keyword(s):  
Wireless Communications ◽  
Communication System ◽  
Patch Antenna ◽  
Chemical Method ◽  
Return Loss ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Antenna Size ◽  
Microstrip Patch ◽  
Rectangular Microstrip Patch Antenna

Abstract The rectangular microstrip patch antenna (RMPA) had designed and manufactured to operate in two working areas of the worldwide interoperability for microwave access (WiMAX) communication system. Flame retardant (FR-4) material had used for implementation, and the total antenna size was 57.22 × 1.6 mm3. The chemical method was used to implement the RMPA. The proposed antenna is capable of working at frequencies 2.51 GHz and 3.87 GHz experimentally. The results were -21.62 dB of return loss, and 50 MHz of bandwidth for the first frequency. Also, for second frequency was -20.01 dB of return loss, and 80 MHz of bandwidth.

The Significance of Government's Role in Technology Standardization

2010 ◽  
Vol 8 (1) ◽  
pp. 63-74 ◽  
Author(s):  
DongBack Seo
Keyword(s):  
Wireless Communications ◽  
First Generation ◽  
Rapid Development ◽  
Global Market ◽  
Domestic Market ◽  
Economic Consequences ◽  
Technology Market ◽  
Early Decision ◽  
Korean Market ◽  
The U.S

For first generation (1G) wireless communications technology standards, the Japanese government’s early decision provided an opportunity for its national manufacturers to be first movers in the global market, while the late development of wireless communications in Korea made the Korean market dependent on foreign manufacturers by adopting the U.S. standard (AMPS). Moving toward the 2G wireless technology market, both countries decided to develop standards instead of adopting a technology from outside their regions. Japan developed its own standard, PDC, while Korea developed CDMA systems with Qualcomm, the U.S. technology provider. Although these governments’ decisions on technologies looked only slightly different, the socio-economic consequences were greatly distinctive. The Korean success brought not only the rapid development of its domestic market but also opportunities for its manufacturers to become global leaders, while the PDC standard only provided the fast growth of the Japanese domestic market without any opportunities for the Japanese manufacturers to grow further internationally in the 1990s. By the end of 1990s, two nations again had to decide a 3G technology standard with vast challenges and pressures.

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