scholarly journals NEW DESIGN OF MICRO-STRIP PATCH ANTENNA FOR WI-FI APPLICATIONS

2021 ◽  
Vol 25 (Special) ◽  
pp. 1-1-1-6
Author(s):  
Ilham H. Qaddoori ◽  
◽  
Raad H. Thaher ◽  
Keyword(s):  
Reflection Coefficient ◽  
Loss Tangent ◽  
Patch Antenna ◽  
Ground Layer ◽  
Operating Frequency ◽  
Antenna Size ◽  
Substrate Layer

In this research, a new design of a semi-star patch antenna is simulated for Wi-Fi applications. The antenna is operated at 2.4GHz, which is modified by inserting rectangular slots in the ground layer. Copper is used for the patch and ground layers, while FR-4 epoxy is used for the substrate layer. FR-4 epoxy has a Ԑr=4.3 and a loss tangent (tanδ) of 0.025. The antenna size is (45x48x1.6) mm³. The proposed antenna provides a reflection coefficient of -41.5 dB and a gain of 2.8 dB at the operating frequency. The proposed antenna is simulated by CST STUDIO SUITE 2019.

Miniaturized bent slotted patch antenna over a reactive impedance surface substrate

2015 ◽  
Vol 8 (2) ◽  
pp. 347-352 ◽  
Author(s):  
Saurabh Kumar ◽  
Dinesh Kumar Vishwakarma
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Low Cost ◽  
Operating Frequency ◽  
Impédance Surface ◽  
Impedance Surface ◽  
Antenna Size ◽  
Antenna Miniaturization ◽  
Current Path ◽  
Good Agreement

A reactive impedance surface (RIS) based miniaturized bent slotted patch antenna is proposed and investigated for S-band applications around 2.39 GHz. Bent slots in the patch reduce the patch antenna size by increasing current path on the patch. Further a RIS substrate with cross-shaped patch elements printed over a grounded dielectric is optimized and investigated for antenna miniaturization. The proposed bent slotted patch antenna over RIS substrate is 38.75% miniaturized with respect to traditional patch antenna at a fixed operating frequency. The proposed antenna reveals an overall volume of 0.280λ0 × 0.280λ0 × 0.036λ0on a low-cost FR4 substrate at 2.39 GHz for S-band applications. The proposed antenna is fabricated and measured for its return loss. The measured results are in good agreement with simulated one.

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.

scholarly journals Correlation between Reflection Coefficient, Dielectric Properties and Brix Level of Malaysian Oranges at Microwave Frequencies

2018 ◽  
Vol 10 (3) ◽  
pp. 853 ◽  
Author(s):  
Rafidah Rosman ◽  
Mohamad Ngasri Dimon ◽  
You Kok Yeow
Keyword(s):  
Dielectric Properties ◽  
Reflection Coefficient ◽  
Experimental Measurement ◽  
Operating Frequency ◽  
Test Bed ◽  
Microwave Frequencies ◽  
Microwave Technique ◽  
Set Up ◽  
The Relationship

This paper presents sweetness degree (°Brix) prediction of the Malaysian oranges using microwave technique. Experimental measurement using monopole sensor and reflectometer was done in order to correlate the relationship between measured reflection coefficient, <em>S</em><sub>11</sub>  of the orange and its sweetness level. Up to fifty orange samples were freshly plucked from local grower’s farm and tested. The unique design of the monopole sensor’s holder is made of nylon. The experiment test bed was set up based on the standard dimension of monopole sensor available in the market. The operating frequency is focusing on 2.2 GHz as it shows significant sensitivity for determining Malaysian local oranges sweetness level.

A Hammer Type Textile Antenna With Partial Circle Ground for Wide-Band Application

2020 ◽  
pp. 15-24
Author(s):  
Anurag Saxena ◽  
Bharat Bhushan Khare
Keyword(s):  
Dielectric Constant ◽  
Reflection Coefficient ◽  
Patch Antenna ◽  
Wide Band ◽  
Simulation Tool ◽  
Textile Antenna ◽  
Partial Circle ◽  
Maximum Directivity

In this chapter, a partial circle ground textile patch antenna for wideband applications with better bandwidth is presented. The simulated antenna is proposed on textile jeans substrate having dielectric constant of 1.7. The radius of textile jeans substrate antenna is 15 mm. The overall simulation of partial circle grounded shaped antenna has been done using CST simulation tool. The simulated antenna resonates at frequency 9.285 GHz with the reflection coefficient of -28 dB. It covers a bandwidth from 7.008 GHz to 9.64 GHz. It has maximum directivity of 4.540 dBi.

In Body Communication

2018 ◽  
Vol 9 (1) ◽  
pp. 64-75 ◽  
Author(s):  
Raghvendra Singh ◽  
Dambarudhar Seth ◽  
Sanyog Rawat ◽  
Kanad Ray
Keyword(s):  
Reflection Coefficient ◽  
Electromagnetic Radiation ◽  
Performance Improvement ◽  
Human Tissue ◽  
Patch Antenna ◽  
Patch Antennas ◽  
Estimation Of Parameters ◽  
Mics Band ◽  
Tissue Models ◽  
Directive Gain

This article makes an effort to assess the performance of a stacked meandered patch antenna in proximity of multiple homogeneous human tissue models. Nowadays, many smart wireless gadgets are being used around human vicinity, hence the performance investigation of these wireless gadgets is major concern. This article discloses the performance of meandered patch antenna for in-body communication in the MICS band. The human tissue is considerably effected by the exposure of electromagnetic radiation. Performance improvement of patch antennas used in wireless gadgets is the key solution of the problem. This article presents the estimation of parameters of stacked meandered patch antennas; reflection coefficient, radiation pattern, directive gain and VSWR in proximity of multiple homogeneous human tissue models.

scholarly journals Varying operating frequency of concentric circular ring patch antenna using high impedance surface

2018 ◽  
Vol 7 (3.29) ◽  
pp. 57
Author(s):  
Rangarao. Orugu ◽  
Srilatha. Gundapaneni ◽  
N Maryleena ◽  
A K.Chaithanya Varma
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Circular Ring ◽  
Impédance Surface ◽  
Impedance Surface ◽  
Antenna Size ◽  
High Impedance ◽  
Circular Patch Antenna ◽  
High Impedance Surface ◽  
Microstrip Feed

In this paper, we design a concentric circular patch antenna excited by microstrip feed and operates at 5.4269 GHz and 6.9419 GHz. After designing the antenna, we would like to tune the frequency without changing antenna size. For that purpose, we use high impedance surface structure to tune the antenna at two different frequencies. A simple mushroom like structure is used as high impedance surface. We will analyze antenna parameters like return loss, gain, directivity, radiation patterns, efficiency, proposed antenna with and without high impedance surfaces and compare the results.  

scholarly journals Design of a Small-Size Broadband Circularly Polarized Microstrip Antenna Array

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Pingyuan Zhou ◽  
Zhuo Zhang ◽  
Mang He ◽  
Yihang Hao ◽  
Chuanfang Zhang
Keyword(s):  
Reflection Coefficient ◽  
Antenna Array ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Satellite Communications ◽  
Lateral Size ◽  
Circularly Polarized ◽  
Feeding Technique ◽  
Microstrip Antenna Array

A small-size 2×2 broadband circularly polarized microstrip antenna array is proposed in this article. The array has four broadband dual-feed U-slot patch antenna elements with circular polarization, and the sequential feeding technique is used to further enhance the 3 dB axial ratio bandwidth. The lateral size of the fabricated array is as small as 1.33λ0×1.33λ0, and the profile is only 0.04λ0. Measured results show that the overlapped −10 dB reflection coefficient and the 3 dB AR bandwidth is 53%, and the variation of the measured realized gain is less than 1 dB for S-band satellite communications (1.98–2.2 GHz).

scholarly journals High Isolation Dual-Polarized Patch Antenna with Hybrid Ring Feeding

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Xian-Jing Lin ◽  
Ze-Ming Xie ◽  
Pei-Sheng Zhang
Keyword(s):  
Reflection Coefficient ◽  
Patch Antenna ◽  
Wide Bandwidth ◽  
High Isolation ◽  
Operating Band ◽  
Feeding Structure ◽  
Dual Polarized ◽  
Horizontal Substrate ◽  
Wide Operating ◽  
Hybrid Ring

This paper presents a hybrid ring feeding dual-polarized patch antenna with high isolation in a wide working band. The proposed antenna consists of a circular radiating patch printed on the upper horizontal substrate, two pairs of Γ shaped strips printed on two vertical substrates, and a hybrid ring feeding network printed on the lower two horizontal substrates. The proposed antenna adopts Γ shape strips coupled feeding structure to achieve a wide operating band. Furthermore, a hybrid ring feeding structure with high isolation in a wide bandwidth, which is firstly proposed, is applied as feeding network. When one port is excited, the feeding network can realize twice the power cancellation. Thus, high ports isolation characteristics can be obtained. A prototype of the proposed antenna is fabricated and measured. Measured results show that the 10 dB reflection coefficient bandwidths of the two ports are both about 38.7%, with port isolation higher than 40 dB through most of the band, and the cross-polarizations are below −24 dB.

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