scholarly journals Designs of rectangular-shaped planar Inverted-F antennas at mobile operating frequencies with different ground plane techniques

2019 ◽  
Vol 15 (2) ◽  
pp. 927
Author(s):  
Nurul Inshirah Mohd Razali ◽  
Norhudah Seman ◽  
Tien Han Chua
Keyword(s):  
Reflection Coefficient ◽  
Resonant Frequency ◽  
Ground Plane ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Radiating Element ◽  
Parametric Studies ◽  
Lower Frequency Range ◽  
Patch Length ◽  
Cst Microwave Studio

This article presents the designs of planar inverted-F antennas (PIFAs) at frequencies of 0.835 GHz, 0.9 GHz, 1.8 GHz, 1.9 GHz, 2 GHz, and 2.6 GHz. Initially, the designs of rectangular-shaped PIFAs are determined through the parametric studies concerning the dimensions of the antenna’s patch length, shorting plate, ground plane, and substrate. Afterward, rectangular-shaped slots are introduced into radiating element of two antennas that operate at a lower frequency range of less than 1 GHz, to tune the resonant frequency to the respective 0.835 GHz and 0.9 GHz. Different configurations of partial or full ground plane are implemented to improve the reflection coefficient, <em>S</em><sub>11</sub> performance to be below -10 dB in both simulation and measurement. The proposed six PIFAs have gain that are greater than 2 dB with the nearly omnidirectional radiation patterns. All the designs and analyses are performed using the CST Microwave Studio utilizing Rogers 4003C substrate.

scholarly journals Design and Specific Absorption Rate of 2.6 GHz Rectangular-Shaped Planar Inverted-F Antenna

2018 ◽  
Vol 10 (2) ◽  
pp. 741
Author(s):  
Nurul Inshirah Mohd Razali ◽  
Norhudah Seman ◽  
Nur Ilham Aliyaa Ishak
Keyword(s):  
Reflection Coefficient ◽  
Parametric Study ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Ground Plane ◽  
Excitation Power ◽  
Antenna Gain ◽  
Specific Absorption ◽  
Patch Length ◽  
Cst Microwave Studio

<span lang="EN-US">This article presents the investigation of specific absorption rate (SAR) of a rectangular-shaped planar inverted-F antenna (PIFA) at frequency of 2.6 GHz. Initially, the design antenna is presented with parametric study concerning the dimensions of antenna patch length, shorting plate, ground plane and substrate. The proposed PIFA antenna has -20.46 dB reflection coefficient and 2.383 dB gain. The PIFA’s SAR is correlated with the antenna gain and excitation power. The analysis shows that higher gain contributes to a lower SAR value. While, the higher excitation power causes a higher SAR value. All the design and analysis are performed using the CST Microwave Studio</span>

scholarly journals A Compact UWB Diversity Antenna

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Hui Zhao ◽  
Fushun Zhang ◽  
Chunyang Wang ◽  
Jiangang Liang
Keyword(s):  
Correlation Coefficient ◽  
Ground Plane ◽  
Impedance Bandwidth ◽  
Antenna Gain ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Microstrip Lines ◽  
Uwb Applications ◽  
Diversity Antenna ◽  
Envelope Correlation

A compact printed ultrawideband (UWB) diversity antenna with a size of 30 mm × 36 mm operating at a frequency range of 3.1–10.6 GHz is proposed. The antenna is composed of two semielliptical monopoles fed by two microstrip lines. Two semicircular slots, two rectangular slots, and one stub are introduced in the ground plane to adjust the impedance bandwidth of the antenna and improve the isolation between two feeding ports. The simulated and measured results show that impedance bandwidth of the proposed antenna can cover the whole UWB band with a good isolation of < −15 dB. The radiation patterns, peak antenna gain, and envelope correlation coefficient are also measured and discussed. The measured results show that the proposed antenna can be a good candidate for some portable MIMO/diversity UWB applications.

scholarly journals Triband Compact Antenna for Multistandard Terminals and User's Hand Effect

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
M. Koubeissi ◽  
M. Mouhamadou ◽  
C. Decroze ◽  
D. Carsenat ◽  
T. Monédière
Keyword(s):  
Numerical Simulations ◽  
Wireless Lan ◽  
Ground Plane ◽  
Total Efficiency ◽  
Radiation Patterns ◽  
Mobile Terminals ◽  
Frequency Bands ◽  
Compact Antenna ◽  
Radiating Element ◽  
Better Than

A novel compact wideband triband antenna for mobile terminals based on PIFA element is proposed. The antenna operates at the following frequency bands: Wireless-LAN 802.11 b, g, a and WiMAX 3.5 GHz. The antenna was studied by means of numerical simulations as well as the ground plane dimensions and user's hand effects. The overall size of the radiating element which is  mm makes it suitable for use in terminals and appropriate to integrated as an internal laptop antenna. The measured bandwidths show that the proposed antenna can cover three bands (2.39–2.48 GHz), (3.36–3.76 GHz), and (4.7–6.3 GHz) and the total efficiency is better than 90%. The radiation patterns of the antenna were carried in an anechoic chamber and are given to demonstrate the antenna's performance.

Low Cost Compact Flexible Textile Antenna With Partial Ground

2021 ◽  
pp. 98-107
Author(s):  
Janabeg Loni ◽  
Anand Kumar Tripathi ◽  
Vinod Kumar Singh
Keyword(s):  
Reflection Coefficient ◽  
Resonant Frequency ◽  
Low Cost ◽  
Ground Plane ◽  
Impedance Bandwidth ◽  
Wireless Applications ◽  
Textile Antenna

In this chapter, a low cost compact flexible textile antenna is presented that has low cost due to partial ground plane, and the anticipated antenna is suitable for different wireless applications. The proposed antenna is utilized as a line feed and simulated from 2GHz to 8GHz frequency. The impedance bandwidth of proposed antenna is 106.30% at -10 dB reflection coefficient. The anticipated design simulated with CST software to achieve directivity at resonant frequency 3.2 GHz is 3.609dBi and at 4.8 GHz is 4.519 dBi.

scholarly journals The Effecting of Human Body on Slotted Monopole Antenna in Wearable Communications

2021 ◽  
Vol 27 (2) ◽  
pp. 27-43
Author(s):  
Aven Rawf Hamza ◽  
Asaad M. Jassim Al-Hindawi
Keyword(s):  
Human Body ◽  
Free Space ◽  
Ground Plane ◽  
Pure Copper ◽  
Relative Dielectric Constant ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Frequency Range ◽  
Radiating Element ◽  
Monopole Antennas

In this paper, the characteristics of microstrip monopole antennas are studied firstly in free space. Secondly, the effects of the human body on the studied antenna's performance are investigated for wearable communications. Different patch shapes of microstrip monopole antenna are chosen to operate at two bands: industrial scientific and medical band (ISM) and ultra-wideband (UWB) for wearable applications. The studied antenna consists of a radiating element on one side of the substrate and a partial ground plane on the other side. The antenna is supposed to fabricate on cloth fabric whose relative dielectric constant is Ɛr =1.7. At the same time, the pure copper could be used as the conducting part representing both the radiating monopole and the partial ground plane. The software program of Computer Simulation Technology (CST) for Microwave Studio (MWS) is utilized to simulate the studied antennas. The obtained results have illustrated that in the free space, the proposed antennas of slotted hexagonal, rectangular, and circular shapes can operate from 2-12 GHz and of the bandwidth of 10.31 GHz, 10.19 GHz, and 9.67 GHz, respectively. The hexagonal antenna is selected and proposed to investigate the effects of the human body on its performance. The human body is simulated, and its effects on the performance of the proposed antenna are studied. The reflection coefficient, Voltage Standing Wave Ratio (VSWR), gain, and efficiency are found over that frequency range. The simulated results indicate that the human body effects are significant, and the proposed antenna showed to be a good candidate for wearable communications.

scholarly journals A Compact Planar UWB Antenna with Triple Controllable Band-Notched Characteristics

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Chaabane Abdelhalim ◽  
Djahli Farid
Keyword(s):  
Group Delay ◽  
Ground Plane ◽  
Frequency Range ◽  
Uwb Antenna ◽  
Radiating Element ◽  
Uwb Applications ◽  
Vertical Up ◽  
Peak Gain ◽  
Triple Band ◽  
Compact Planar

A modified compact planar ultrawideband (UWB) monopole antenna with triple controllable band-notched characteristics is presented in this paper. The proposed antenna consists of a modified stair cased V-shaped radiating element and partial ground plane. The triple band-notched characteristics are achieved by embedding two different vertical up C-shaped slots with a vertical down C-shaped slot in the radiating patch and in the ground plane, respectively. Besides, the bandwidth of each rejected band can be independently controlled by adjusting the dimensions of the corresponding band notched structure. The proposed antenna with rejected bands characteristics is successfully simulated, prototyped, and measured. The measured results show that the antenna operates until upper 11 GHz for voltage standing wave ratio (VSWR) is less than 2, and exhibits bands rejection of 1.6–2.66 GHz (49.76%), 3-4 GHz (28.57%), and 5.13–6.03 GHz (16.12%). Moreover, the proposed antenna shows a near omnidirectional radiation patterns, stable peak gain, and with small group delay and transfer function variation on the whole UWB frequency range except in the notched frequency bands, which makes it suitable for being used in the future UWB applications.

A compact dual port UWB-MIMO/diversity antenna for indoor application

2017 ◽  
Vol 10 (3) ◽  
pp. 360-367 ◽  
Author(s):  
Sonika Priyadarsini Biswal ◽  
Sushrut Das
Keyword(s):  
Mimo System ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Open Circuit ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Good Prospect ◽  
Mimo Antenna ◽  
Radiating Element ◽  
Input Multiple Output

A compact printed quadrant shaped monopole antenna is introduced in this paper as a good prospect for ultra wideband- multiple-input multiple-output (UWB-MIMO) system. The proposed MIMO antenna comprises two perpendicularly oriented monopoles to employ polarization diversity. An open circuit folded stub is extended from the ground plane of each radiating element to enhance the impedance bandwidth satisfying the UWB criteria. Two ‘L’ shaped slots are further etched on the radiator to provide good isolation performance between two radiators. The desirable radiator performances and diversity performances are ensured by simulation and/or measurement of the reflection coefficient, radiation pattern, realized peak gain, envelope correlation coefficient (ECC), diversity gain, mean effective gain (MEG) ratio and channel capacity loss (CCL). Results indicate that the proposed antenna exhibits 2.9–11 GHz 10 dB return loss bandwidth, mutual coupling <−20 dB, ECC < 0.003, MEG ratio ≈ 1, and CCL < 0.038 Bpsec/Hz, making it a good candidate for UWB and MIMO diversity application.

scholarly journals A Circular Disc Microstrip Antenna with Dual Notch Band for GSM/Bluetooth and Extended UWB Applications

2018 ◽  
Vol 7 (2.16) ◽  
pp. 11
Author(s):  
Sanjeev Kumar ◽  
Ravi Kumar ◽  
Rajesh Kumar Vishwakarma
Keyword(s):  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Ground Plane ◽  
Circular Disc ◽  
Ultra Wideband ◽  
Resonant Circuit ◽  
Frequency Range ◽  
Notch Band ◽  
Uwb Applications ◽  
Ku Band

A microstrip antenna with a circular disc design and modified ground is proposed in this paper. Circular shapes of different size have been slotted out from the radiating patch for achieving extended ultra wideband (UWB) with GSM/Bluetooth bands with maximum bandwidth of 17.7 GHz (0.88-18.6 GHz). Further, characteristic of dual notch band is achieved, when a combination of T and L-shaped slots are etched into the circular disc and ground plane respectively. Change in length of slots is controlling the notch band characteristics. The proposed antenna has rejection bandwidth of 1.3-2.2 GHz (LTE band), 3.2-3.9 GHz (WiMAX band) and 5.2-6.1 GHz (WLAN band) respectively. It covers the frequency range of 0.88-18.5 GHz with the VSWR of less than 2. Also, an equivalent parallel resonant circuit has been demonstrated for band notched frequencies of the designed antenna. The gain achieved by the proposed antenna is 6.27 dBi. This antenna has been designed, investigated and fabricated for GSM, Bluetooth, UWB, X and Ku band applications. The stable gain including H & E-plane radiation pattern with good directivity and omnidirectional behavior is achieved by the proposed antenna. Measured bandwidths are 0.5 GHz, 0.8 GHz, 1.1 GHz and 11.7 GHz respectively. 

Low-profile U-shaped DRA for ultra-wideband applications

2016 ◽  
Vol 9 (3) ◽  
pp. 621-627 ◽  
Author(s):  
Idris Messaoudene ◽  
Tayeb A. Denidni ◽  
Abdelmadjid Benghalia
Keyword(s):  
Dielectric Resonator ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Radiation Patterns ◽  
Wide Bandwidth ◽  
Operating Band ◽  
Low Profile ◽  
Measurement Results

In this paper, a microstrip-fed U-shaped dielectric resonator antenna (DRA) is simulated, designed, and fabricated. This antenna, in its simple configuration, operates from 5.45 to 10.8 GHz. To enhance its impedance bandwidth, the ground plane is first modified, which leads to an extended bandwidth from 4 to 10.8 GHz. Then by inserting a rectangular metallic patch inside the U-shaped DRA, the bandwidth is increased more to achieve an operating band from 2.65 to 10.9 GHz. To validate these results, an experimental antenna prototype is fabricated and measured. The obtained measurement results show that the proposed antenna can provide an ultra-wide bandwidth and a symmetric bidirectional radiation patterns. With these features, the proposed antenna is suitable for ultra-wideband applications.

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