Folded meandered-patch monopole antenna for low-profile GSM/DCS dual-band mobile phone

AbstractA low profile super-wideband polarization diversity printed monopole antenna with dual band-notched characteristics is presented the first time. The designed antenna comprises two arched shaped radiating elements with two triangular tapered microstrip feed lines (TTMFL) and two arched shaped partial ground planes, which covers an enormously wide impedance bandwidth (BW) from 1.2 to 25 GHz (ratio BW of 20.8:3) for reflection coefficient |S11| < −10 dB. To ensure the high port isolation (better than − 30 dB) between two feeding ports over the whole bands, two analogous antennas have been kept perpendicular to each other at a distance of 1 mm. In addition, the dual band-notched performance in wireless local area network (5–6 GHz) and X-band (7.2–8.5 GHz) is generated by employing a pair of open-circuited stubs (L-shaped stub and horizontal stub) to the TTMFL. Envelop correlation coefficient has been computed to study the polarization diversity performance. Finally, the proposed antenna was fabricated and tested successfully. Measured results indicate that the proposed antenna is an appropriate candidate for the polarization diversity applications. The proposed antenna has a compact size of 40 × 70 × 0.787 mm3, high isolation, and occupies a small space compared with the existing antennas.

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A New Design of a CPW-Fed Dual-Band Monopole Antenna for RFID Readers

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v8i2.pp1040-1047 ◽

2018 ◽

Vol 8 (2) ◽

pp. 1040

Author(s):

Ahmed El Hamraoui ◽

EL Hassane Abdelmounim ◽

Jamal Zbitou ◽

Hamid Bennis ◽

Mohamed Latrach

Keyword(s):

Low Cost ◽

Coplanar Waveguide ◽

Monopole Antenna ◽

Antenna Design ◽

Dual Band ◽

Critical Parameters ◽

Antenna Structure ◽

Low Profile ◽

Measurement Results ◽

Rfid Readers

<p>This paper comes with a new dual-band planar monopole antenna fed by Coplanar Waveguide (CPW) line designed for RFID readers and it operates at 2.45 GHz, 5.80 GHz. This antenna is designed with reasonable gain, low profile and low cost production. The designed antenna based on theoretical equations is simulated and validated by using ADS from Agilent technologies and CST Microwave Studio electromagnetic solvers. A parametric study of the proposed antenna has been carried out by optimizing some critical parameters. The antenna has a total area of 35×38 mm2 and mounted on an FR4 substrate with dielectric permittivity constant 4.4 and thickness of 1.6 mm and loss tangent 0.025. The comparison between simulation and measurement results permits to validate the final achieved antenna structure in the desired RFID frequencies bands. Details of the proposed antenna design and both simulated and experimental results are described and discussed</p>

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A Compact Dual-Band Metasurface-Based Antenna for Wearable Medical Body-Area Network Devices

Journal of Electrical and Computer Engineering ◽

10.1155/2020/4967198 ◽

2020 ◽

Vol 2020 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Guangchen Mu ◽

Pengshan Ren

Keyword(s):

Wearable Devices ◽

Monopole Antenna ◽

Dual Band ◽

Body Area Network ◽

Area Network ◽

Body Area ◽

Low Profile ◽

Working Frequency ◽

Wearable Medical ◽

Integrated Antenna

A compact, low-profile wearable antenna capable of operation within the 5.1–5.46 GHz and 5.7–5.85 GHz medical body-area network band is suggested to make the antenna better for wearable devices. The integrated metasurface (MSs) antenna consists of as few as array of three wan-shaped components, directly below the planar waveguide-fed monopole antenna. The measurement of the integrated antenna is 0.56λ0×0.56λ0×0.08λ0, all while achieving an average gain of 8.2 dBi in working frequency and a front-to-back ratio (FB) in excess of 19 dB. As demonstrated by in-depth examination, the antenna performs exceptionally well in withstanding the distortion of structure, far superior to planar monopole antenna. Additionally, the metasurface enables the specific absorption rate (SAR) low to 0.84 W/kg, which makes this type of antenna suited to application in different wearable devices.

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