Expanded graphite monopole antenna printed on flexible paper substrate for 2.4 GHz wireless systems

Abstract In this work, a printed coplanar waveguide (CPW) fed single band antenna based on expanded graphite material is introduced. The proposed antenna is based on a CPW-monopole antenna with a U-shape conductor strip connected with the ground. Expanded graphite, a grade of graphene, is used as a conductor to design the uniplanar antenna over a flexible paper substrate. The antenna is designed for 2.4 GHz applications. The antenna design procedures are discussed. The material preparation and analysis are illustrated. Finally, the antenna fabrication and measurements of the reflection coefficient are discussed. The measured antenna reflection coefficient agrees with the simulated one, ensuring the antenna validity for serving the required applications. The radiation antenna parameters are discussed and simulated results from two-simulation software are included for comparison. The antenna has a simulated gain of 4 dBi and simulated efficiency of around 90% at 2.4 GHz.

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Dual Band Paper Substrate CPW Antenna for Wireless Applications

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.i3121.0789s319 ◽

2019 ◽

Vol 8 (9S3) ◽

pp. 605-608

Keyword(s):

Reflection Coefficient ◽

Mobile Communication ◽

Coplanar Waveguide ◽

Dual Band ◽

Antenna Feed ◽

Paper Substrate ◽

Frequency Bands ◽

Wireless Applications

In this paper, a 15* 80 sized antenna is designed over a paper substrate to test its flexible properties. The proposed antenna feed by a grounded coplanar waveguide(GCPW) is stimulated and the measured results show the operating Dual Band of the antenna cover(3.34-3.62 GHz) and (5.92-6.24 GHz) with the reflection coefficient |S11|< -15dB.These frequency bands operate over SHF bands and hence supports Fixed Mobile Communication and WLAN applications.

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Compact Hexagonal Monopole Antenna for Lower 5G Bands

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.2714 ◽

2019 ◽

Vol 9 (3) ◽

pp. 4200-4202

Author(s):

H. Alsaif

Keyword(s):

Reflection Coefficient ◽

Radiation Pattern ◽

Ground Plane ◽

Wireless Systems ◽

Wide Band ◽

Simulation Software ◽

Planar Antenna ◽

Total Size ◽

Patch Geometry ◽

Compact Planar

This paper presents a compact planar antenna with extreme wide band. The antenna is designed to cover the entire lower 5th generation operating bands ranging from 2.32GHz to more than 12GHz. This band also covers the IEEE 802.11 a/b/g/n/ac. The patch geometry has been simulated using an industrial standard simulation software called CST MWS. The monopole is miniaturized with a total size of 23x24x1.2mm3. The radiator and the ground plane are printed on a substrate of Rogers Duriod RT 5880 with relative permittivity of 2.2 and loss tangent of 0.00009. The simulated reflection coefficient and radiation pattern results are presented. S11 parameter for the designed antenna is less that -10dB over the operating band, with lowest value of -32.5dB at 2.85GHz. The radiation pattern is presented at the two orthogonal planes, elevation (E plane) and azimuth (H plane). Simulated results show that the antenna is appropriate of lower 5G bands application and several other wireless systems.

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Novel MEMS Dipole/Monopole Antenna for Wireless Systems Operating at 77 GHz

PIERS Online ◽

10.2529/piers091219072654 ◽

2010 ◽

Vol 6 (6) ◽

pp. 547-550 ◽

Cited By ~ 7

Author(s):

Ezzeldin A. Soliman ◽

Sherif Sedky ◽

M. O. Sallam ◽

S. Hassan ◽

O. El Katteb ◽

...

Keyword(s):

Wireless Systems ◽

Monopole Antenna ◽

77 Ghz

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A compact CPW-fed monopole antenna for multi-band application

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078721001318 ◽

2021 ◽

pp. 1-7

Author(s):

YunYan Zhou ◽

NianShun Zhao ◽

RenXia Ning ◽

Jie Bao

Keyword(s):

Mobile Communications ◽

Radio Frequency Identification ◽

Communication Systems ◽

Satellite Communication ◽

Coplanar Waveguide ◽

Dielectric Substrate ◽

Monopole Antenna ◽

Radiation Characteristics ◽

Frequency Bands ◽

Compact Size

Abstract A compact coplanar waveguide-fed monopole antenna is presented in this paper. The proposed antenna is composed of three monopole branches. In order to achieve the miniaturization, the longest branch was bent. The antenna is printed on an FR4 dielectric substrate, having a compact size of 0.144λ0 × 0.105λ0 × 0.003λ0 at its lowest resonant frequency of 900 MHz. The multiband antenna covers five frequency bands: 820–990 MHz, 1.87–2.08 GHz, 2.37–2.93 GHz, 3.98–4.27 GHz, and 5.47–8.9 GHz, which covers the entire radio frequency identification bands (860–960 MHz, 2.4–2.48 GHz, and 5.725–5.875 GHz), Global System for Mobile Communications (GSM) bands (890–960 MHz and 1.850–1.990 GHz), WLAN bands (2.4–2.484 GHz and 5.725–5.825 GHz), WiMAX band (2.5–2.69 GHz), X-band satellite communication systems (7.25–7.75 GHz and 7.9–8.4 GHz), and sub 6 GHz in 5G mobile communication system (3.3–4.2 GHz and 4.4–5.0 GHz). Also, the antenna has good radiation characteristics in the operating band, which is nearly omnidirectional. Both the simulated and experimental results are presented and compared and a good agreement is established. The proposed antenna operates in five frequency bands with high gain and good radiation characteristics, which make it a suitable candidate in terminal devices with multiple communication standards.

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WIDEBAND JEAN ANTENNA WITH BENDING STRUCTURE FOR MICROWAVE IMAGING APPLICATIONS

Jurnal Teknologi ◽

10.11113/jt.v78.8893 ◽

2016 ◽

Vol 78 (6-2) ◽

Author(s):

Roshayati Yahya ◽

Muhammad Ramlee Kamarudin ◽

Norhudah Seman ◽

Ali Moradikordalivand

Keyword(s):

Reflection Coefficient ◽

Normal Condition ◽

Coplanar Waveguide ◽

Microwave Imaging ◽

Radiation Characteristics ◽

Body Effect ◽

Expected Frequency ◽

Design Evolution ◽

Bending Effect ◽

Feeding Structure

In this paper, a wideband jean antenna with bending structure for flexible microwave imaging applications is presented. Coplanar waveguide (CPW) feeding structure with Koch shape ground slotted technique has been implemented for widening the bandwidth. The design evolution process of the proposed antenna is started from a simple CPW-fed monopole antenna to bending circumstance. The proposed antennas under normal condition, bending circumstance and as well as on-arm bending effect are simulated and optimized using CST microwave studio software and fabricated; also tested so as to validate the results . Under normal condition, the antenna provides measured bandwidth of 4500 MHz (1.5–6 GHz) in the case of |S11|≤−10 dB while 4360 MHz (1.44–5.8 GHz) for the measured bandwidth under bending circumstance is obtained. Also, there is a slight degradation on the reflection coefficient of the antenna under on-arm bending so that measured bandwidth became narrower with operating frequency of 3800 MHz (2.2–6 GHz). The measured gain of the antenna fluctuates between 2.5–5.6 dBi and 1.5–2.8 dBi with quasi-omnidirectional pattern within the expected frequency band for normal and bending condition, respectively. The proposed antenna provides a good performance in terms of its reflection coefficient and radiation characteristics. Therefore, due to insensitiveness to bending and body effect, the proposed antenna has become good candidate for microwave imaging applications.

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Beam-Reconfigurable Multi-Antenna System with Beam-Combining Technology for UAV-to-Everything Communications

Electronics ◽

10.3390/electronics9060980 ◽

2020 ◽

Vol 9 (6) ◽

pp. 980

Author(s):

Yu-Seong Choi ◽

Jeong-Su Park ◽

Wang-Sang Lee

Keyword(s):

Power Distribution ◽

Patch Antenna ◽

Coplanar Waveguide ◽

Antenna System ◽

Monopole Antenna ◽

Total Efficiency ◽

Beam Combining ◽

Low Profile ◽

Side Beam ◽

Half Power

This paper proposes a beam-reconfigurable antenna for unmanned aerial vehicles (UAVs) with wide beam coverage by applying beam-combining technology to multiple antennas with different beam patterns. The proposed multi-antenna system consists of a circular patch antenna and a low-profile printed meandered monopole antenna. For beam combining, a coplanar waveguide with ground (CPW-G) structure feeding network is proposed, and it consists of two input ports, a 90° hybrid coupler, a microstrip 90° phase delay line, and a single-pole double-throw (SPDT) switch. It performs the role of power distribution and phase adjustment, and synthesizes the broad-side beam of the monopole antenna and the end-fire beam of the patch antenna to form the directive broadside beams in four different directions. The proposed antenna system operates at 5–5.5 GHz which covers both UAV ground control frequencies (5.03–5.09 GHz) and UAV mission frequencies (5.091–5.150 GHz). The peak gain, total efficiency, and half-power beamwidth (HPBW) of the antenna system are approximately 5.8 dBi, 76%, 145° in the elevation plane, and 360° in the azimuth plane respectively. Its electrical size and weight are λ 0 × λ 0 × 0.21 λ 0 at 5.09 GHz and 19.2 g, respectively.

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Wide CPW-Fed Multiband Wearable Monopole Antenna with Extended Grounds for GSM/WLAN/WiMAX Applications

International Journal of Antennas and Propagation ◽

10.1155/2019/4264513 ◽

2019 ◽

Vol 2019 ◽

pp. 1-14 ◽

Cited By ~ 2

Author(s):

Danvir Mandal ◽

S. S. Pattnaik

Keyword(s):

Resonance Condition ◽

Coplanar Waveguide ◽

Impedance Matching ◽

Monopole Antenna ◽

Antenna Performance ◽

Quarter Wavelength ◽

Triangular Patch ◽

Matching Structure ◽

Standard Limit ◽

Good Agreement

A novel wide coplanar waveguide- (CPW-) fed multiband wearable monopole antenna is presented. The multiband operation is achieved by generating slanted monopoles of different lengths from an isosceles triangular patch. The different operating frequencies of the proposed antenna are associated with the lengths of the slanted monopoles, which are determined under quarter wavelength resonance condition. The CPW line is used as a multiband impedance-matching structure. The two grounds are slightly extended for better impedance matching. The proposed antenna is designed to cover the 1800 MHz GSM, 2.4 GHz/5.2 GHz WLAN, and 3.5 GHz WiMAX bands. The measured peak gains and impedance bandwidths are about 4.18/3.83/2.6/2.94 dBi and 410/260/170/520 MHz for the 1550-1960 MHz/2.3-2.56 GHz/3.4-3.57 GHz/5.0-5.52 GHz bands, respectively. The calculated averaged specific absorption rate (SAR) values at all the resonant frequencies are well below the standard limit of 2 W/kg, which ensures its feasibility for wearable applications. The antenna performance under different bending configurations is investigated and the results are presented. The reflection coefficient characteristics of the proposed antenna is also measured for different on-arm conditions and the results are compared. A good agreement between experimental and simulation results validates the proposed design approach.

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Analysis and design of a triple band metamaterial simplified CRLH cells loaded monopole antenna

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078716000738 ◽

2016 ◽

Vol 9 (4) ◽

pp. 903-913 ◽

Cited By ~ 10

Author(s):

Mahmoud Abdelrahman Abdalla ◽

Zhirun Hu ◽

Cahyo Muvianto

Keyword(s):

Simple Structure ◽

Monopole Antenna ◽

Proof Of Concept ◽

Analysis And Design ◽

Design Procedures ◽

Left Handed ◽

Full Wave ◽

Compact Size ◽

Resonance Frequencies ◽

Triple Band

The design and analysis of meta-material inspired loaded monopole antenna for multiband operation are reported. The proposed antenna consists of multi resonators inspired from half mode composite right/left handed cells, which has a simple structure, compact size, and provides multiband functionalities. As a proof of concept, a triple band antenna covering all possible WiMAX operating bands, has been designed, fabricated, and characterized. The hosting monopole patch itself generates resonance for 3.3–3.8 GHz band, whereas the loaded metamaterial cells add extra resonance frequencies. The loading of two resonator cells introduces two extra resonances for 2.5–2.7 GHz and 5.3–5.9 GHz bands, respectively. The antenna's operating principle and design procedures with the aid of electromagnetic full wave simulation and experimental measurements are presented. The antenna has good omnidirectional patterns at all three bands. The monopole patch size is 13.5 × 6.5 mm2and the whole antenna size (including the feed line) is 35 × 32 mm2. Compared with conventional single band microstrip patch radiator, the radiator size of this antenna is only 8.5% at 2.5 GHz, 17% at 3.5 GHz, and 37% at 5.5 GHz.

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