A compact dual-band antenna with a C-shaped ground plane for WLAN applications

2011 ◽  
Author(s):  
Y. Zhao ◽  
Y.-Z. Yin ◽  
B. Li ◽  
Y. Luo ◽  
W. Hu
Keyword(s):  
Ground Plane ◽  
Dual Band ◽  
Dual Band Antenna

Dual-band THz antenna with SNG loads for biosensing and early skin cancer detection with Fano response: A numerical study

2021 ◽  
pp. 146442072110306
Author(s):  
Shima Poorgholam-Khanjari ◽  
Ferdows B Zarrabi
Keyword(s):  
Cancer Detection ◽  
Numerical Study ◽  
Quartz Substrate ◽  
Ground Plane ◽  
The Body ◽  
Dual Band ◽  
Total Size ◽  
Sensing Applications ◽  
Dual Band Antenna ◽  
Thz Antenna

THz spectrum is one of the safest areas of light for the body which can be considered in biomedical sensing applications in the human body and can be utilized for high sensitivity detection. In this paper, a THz antenna with a single negative (SNG) load is developed for early cancer detection application. The SNG load is useful to increase the gain and efficiency of the antenna. The primary antenna has a circular slot on the ground plane. Metamaterial element is placed on the cylindrical dielectric. The total size of the antenna is 400 × 400 μm 2 and the loss-less quartz substrate is used to design the proposed antenna. In addition, the SNG load provides dual-band characteristics, and the proposed antenna covers 0.85 and 1 THz with high directivity and efficiency which is more than 90%. The achieved results proved that the antenna has higher sensitivity at a lower frequency. Moreover, we showed the proposed dual-band antenna can be used to increase the sensing accuracy of the device to detect the progress of cancer in a specific sample.

scholarly journals Compact Dual-Band Antenna with Paired L-Shape Slots for On- and Off-Body Wireless Communication

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7953
Author(s):  
Sarosh Ahmad ◽  
Adnan Ghaffar ◽  
Niamat Hussain ◽  
Nam Kim
Keyword(s):  
Frequency Band ◽  
Patch Antenna ◽  
Specific Absorption Rate ◽  
Ground Plane ◽  
Dual Band ◽  
Physical Layers ◽  
Dual Band Antenna ◽  
Lower Frequency Band ◽  
And Performance ◽  
The Impact

A simple dual-band patch antenna with paired L-shap slots for on- and off-body communications has been presented in this article. The proposed antenna resonates in the industrial, scientific, and medical (ISM) band at two different frequencies, at 2.45 GHz and 5.8 GHz. At the lower frequency band, the antenna’s radiation pattern is broadsided directional, whereas it is omni-directional at the higher frequency band. The efficiency and performance of the proposed antenna under the influence of the physical body are improved, and the specific absorption rate (SAR) value is significantly reduced by creating a full ground plane behind the substrate. The substrate’s material is FR-4, the thickness of which is 1.6 mm and it has a loss tangent of tanδ = 0.02. The overall size of the proposed design is 40 mm × 30 mm × 1.6 mm. Physical phantoms, such as skin, fat and muscle, are used to evaluate the impact of physical layers at 2.45 GHz and 5.8 GHz. The SAR values are assessed and found to be 0.19 W/kg and 1.18 W/kg at 2.45 GHz and 5.8 GHz, respectively, over 1 gram of mass tissue. The acquired results indicate that this antenna can be used for future on- and off-body communications and wireless services.

scholarly journals Miniature Slotted Semi-Circular Dual-Band Antenna for WiMAX and WLAN Applications

2020 ◽  
Vol 20 (2) ◽  
pp. 115-124
Author(s):  
Dhirgham Kamal Naji
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Order Mode ◽  
Circular Patch ◽  
Area Reduction ◽  
Antenna Miniaturization ◽  
Dual Band Antenna ◽  
Simple Geometry

In this paper, a new approach is presented for designing a miniaturized microstrip patch antenna (MPA) for dual-band applications. The proposed MPA consists of a semi-circular patch radiator fed by a 50-Ω coplanar waveguide (CPW) structure with a tapered-ground plane for enhancing impedance bandwidth over the dual-band. By inserting a folded U-shaped slot into the semi-circular patch, the proposed antenna introduces an additional higher-order mode but does not modify the resonance frequency of the lower-order mode of the patch, yielding the desired dual-band response. For antenna miniaturization, the circular-shaped radiator of the reference antenna (RA) was converted into a semi-circular radiating patch. Agreement between CST and HFSS simulated results led us to manufacture a prototype of the designed antenna on one side of an inexpensive FR-4 substrate with an overall dimension of 17 × 18 × 0.8 mm<sup>3</sup>. The measured result in terms of reflection coefficient S11 confirms that the antenna operates in both 3.5 GHz (3.4–3.7 GHz) and 5.8 GHz (5.725–5.875 GHz) bands suitable for use in WiMAX and WLAN applications, respectively. Moreover, besides an area reduction of 32% compared with the RA counterpart, the proposed antenna has other features, a simple geometry, and is easy to manufacture in comparison with previously reported antenna structures.

scholarly journals Analysis of Resonance Response Performance of C-Band Antenna Using Parasitic Element

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
M. R. Zaman ◽  
M. T. Islam ◽  
N. Misran ◽  
J. S. Mandeep
Keyword(s):  
Resonance Frequency ◽  
Ground Plane ◽  
Dual Band ◽  
Fractional Bandwidth ◽  
Parasitic Element ◽  
Microstrip Lines ◽  
Dual Band Antenna ◽  
Lower Band ◽  
Resonance Response ◽  
Response Performance

Analysis of the resonance response improvement of a planar C-band (4–8 GHz) antenna is proposed using parasitic element method. This parasitic element based method is validated for change in the active and parasitic antenna elements. A novel dual-band antenna for C-band application covering 5.7 GHz and 7.6 GHz is designed and fabricated. The antenna is composed of circular parasitic element with unequal microstrip lines at both sides and a rectangular partial ground plane. A fractional bandwidth of 13.5% has been achieved from 5.5 GHz to 6.3 GHz (WLAN band) for the lower band. The upper band covers from 7.1 GHz to 8 GHz with a fractional bandwidth of 12%. A gain of 6.4 dBi is achieved at the lower frequency and 4 dBi is achieved at the upper frequency. The VSWR of the antenna is less than 2 at the resonance frequency.

scholarly journals A Compact Dual-Band Planar Monopole Antenna Using Fractal Rings and A Y-Shaped Feeding Transmission Line

Frequenz ◽  
2019 ◽  
Vol 73 (1-2) ◽  
pp. 25-36
Author(s):  
Kahina Djafri ◽  
Mouloud Challal ◽  
Jordi Romeu
Keyword(s):  
Transmission Line ◽  
Radiation Pattern ◽  
Impedance Matching ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Dual Band ◽  
Laptop Computer ◽  
Rectangular Slot ◽  
Dual Band Antenna ◽  
Band Characteristic

Abstract This paper presents a novel design approach of a compact dual-band monopole antenna with an overall size of 18.9x13x1.6mm3. The proposed antenna is composed of a fractal ring shaped patch fed by a Y-shaped transmission line on the top side of the substrate and a second fractal ring along with a U-shaped ground plane on the bottom side. The second fractal ring, identical to the radiating ring, is loaded and a rectangular slot is etched at the top side of the ground plane respectively, to achieve dual-band characteristic and improve the impedance matching. The effect of standard ground-plane (SGP) of a laptop computer is incorporated in the design; the antenna is mounted on a SGP in order to investigate its performance. The antenna covers widely the frequency bands of the WLAN 2.4 GHz (2.2–2.52 GHz) and WiMAX 3.5 GHz (3.32–4.35 GHz), and exhibits an omnidirectional radiation pattern in the H-plane and a monopole like radiation pattern in the E-plane. A good agreement between the simulated and measured results indicates that the proposed dual-band antenna design is suitable for WLAN/WiMAX applications.

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