scholarly journals A Low Profile Dual-Band High Gain Directional Antenna for Anti-Interference WLAN Station Applications

2021 ◽  
Vol 11 (5) ◽  
pp. 2007
Author(s):  
Yuqing Dou ◽  
Guiting Dong ◽  
Jiafu Lin ◽  
Qibo Cai ◽  
Gui Liu
Keyword(s):  
Frequency Band ◽  
Local Area Network ◽  
Ground Plane ◽  
Directional Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Directional Radiation ◽  
Dual Band Antenna ◽  
Low Profile

This paper presents a low-profile dual-band antenna with directional radiation characteristics for wireless local area network (WLAN) applications. The proposed directional antenna is composed of a coupling microstrip line, two F-shaped strips, two rectangular strips, and a defected ground plane. The measured impedance bandwidth of the proposed antenna is 180 MHz (2.33–2.51 GHz) and 830 MHz (5.09–5.92 GHz), which can cover Institute of Electrical and Electronic Engineers (IEEE) 802.11 a/b/g frequency bands. The dual-band antenna exhibits a desirable directional radiation patterns in the vertical and horizontal planes with the peak gain of 6.55 dBi in the lower frequency band and 8.1 dBi in the higher frequency band. The measured antenna efficiency is 70% at 2.4 GHz and 84.5% at 5.5 GHz. The proposed dual-band WLAN station antenna is designed on a FR4 substrate with overall dimensions of 69 mm × 50 mm × 1.6 mm.

Design of dual band-notched lamp-shaped antenna with UWB characteristics

2015 ◽  
Vol 9 (2) ◽  
pp. 395-402 ◽  
Author(s):  
Swati Yadav ◽  
Anil Kumar Gautam ◽  
Binod Kumar Kanaujia
Keyword(s):  
Electromagnetic Interference ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Ground Plane ◽  
Dual Band ◽  
Electrical Performance ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Impedance Mismatch ◽  
Rectangular Slot

To restrict electromagnetic interference at WiMAX (3.3–3.7 GHz) and wireless local area network (WLAN) (5.15–5.825 GHz) bands operating within ultra wide bandwidth (UWB) band, a novel design of lamp-shaped UWB microstrip antenna with dual band-notched characteristics is presented. The proposed antenna is composed of a lamp-shaped radiating patch with two rectangular ground planes on both the sides of the radiator with the gap of 0.57 mm. To improve impedance mismatch at middle frequencies, two triangular strips one at each of the ground plane are added; whereas a rectangular slot is etched in the radiating patch to remove impedance mismatch at higher frequencies of the UWB band. Furthermore, an L-shaped slot in the radiator and two L-shaped slots in the ground plane are used to restrict electromagnetic interference (EMI) at WiMAX and WLAN bands, respectively, without affecting the electrical performance of the UWB antenna. Effects of the key parameters on the frequency range of the notched bands are also investigated. The proposed design shows a measured impedance bandwidth of 12.5 GHz (2.7–14.4 GHz), with the two band-notched bands of 3.0–3.9 and 4.9–5.8 GHz. The antenna is suitable to be integrated within the portable UWB devices without EMI interference at WiMAX and WLAN bands.

scholarly journals Design of dual band slotted reconfigurable antenna using electronic switching circuit

2021 ◽  
Vol 24 (1) ◽  
pp. 386
Author(s):  
Mustafa M. Al-Saeedi ◽  
Ahmed A. Hashim ◽  
Omer Al-Bayati ◽  
Ali Salim Rasheed ◽  
Rasool Hasan Finjan
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Ground Plane ◽  
Local Area ◽  
Dual Band ◽  
Area Network ◽  
Radiation Patterns ◽  
Directional Radiation ◽  
Constant E ◽  
Lower Complexity

This paper proposes a dual band reconfigurable microstrip slotted antenna for supporting the wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications, providing coverage where both directive and omni-directive radiations are needed. The design consists of a feedline, a ground plane with two slots and two gaps between them to provide the switching capability and a 1.6 mm thick flame retardant 4 (FR4) substrate (dielectric constant Ɛ=4.3, loss tangent δ=0.019), modeling an antenna size of 30x35x1.6 mm3. The EM simulation, which was carried out using the connected speech test (CST) studio suite 2017, generated dual wide bands of 40% (2-3 GHz) with -55 dB of S11 and 24% (5.2-6.6 GHz) higher than its predecessors with lower complexity and -60 dB of S11 in addition to the radiation pattern versatility while maintaining lower power consumption. Moreover, the antenna produced omnidirectional radiation patterns with over than 40% bandwith at 2.4 GHz and directional radiation patterns with 24% bandwith at the 5.8 GHz band. Furthermore, a comprehensive review of previously proposed designs has also been made and compared with current work.

Low profile dual band-stop super wideband printed monopole antenna with polarization diversity

2019 ◽  
Vol 11 (7) ◽  
pp. 694-702
Author(s):  
Murli Manohar ◽  
Rakhesh Singh Kshetrimayum ◽  
Anup Kumar Gogoi
Keyword(s):  
Local Area Network ◽  
Monopole Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Polarization Diversity ◽  
Low Profile ◽  
Compact Size ◽  
Printed Monopole Antenna ◽  
Printed Monopole

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.

scholarly journals Design of Low Profile Multiband USB Dongle Antenna

2016 ◽  
Vol 1 (2) ◽  
pp. 8-11
Author(s):  
Hemin Ismael Azeez ◽  
Shorsh Kareem Ahmed ◽  
Mohamed Abdullah Husain
Keyword(s):  
Reflection Coefficient ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Dual Band ◽  
Area Network ◽  
Total Radiation ◽  
Directional Radiation ◽  
Low Profile ◽  
Resonant Modes

A dual band F-shaped printed mono-pole antenna (USB dongle) with two meandered strips is proposed and tested. The two strips that resonating at 2.45 GHz and 5.2 GHz have uniform and fixed width of 0.5 mm. A thin layer of 0.8 mm thickness FR4 substrate (permittivity =4.4, loss tangent=0.0245) which is economically cheap is used for the unit fabrication.  The two resonant modes will best support Bluetooth (BT) and WLAN (Wireless Local Area Network) having enough supportive bandwidth which is defined by -10dB reflection coefficient. The proposed unit is low profile, compact and simple to fabricate. The whole unit that has an overall size of (0.8mm x 10 mm x 40 mm) is efficient for having 97% and 94 % total radiation efficiency at both operating frequencies respectively. Through applying different simulation scenarios to the unit such as varying the feeding location and changes in the strips length, it has been revealed that the antennas is sensitive and reactive. The proposed antenna has provided good performance and Omni-directional radiation pattern. Good matching between the simulated and measured reflection coefficient results for the antenna prototype has been achieved.

An ACS-fed F-shaped monopole antenna for GPS/WLAN/WiMAX applications

2016 ◽  
Vol 9 (5) ◽  
pp. 1123-1129 ◽  
Author(s):  
Wang Ren ◽  
Shu-Wei Hu ◽  
Chen Jiang
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Low Cost ◽  
Ground Plane ◽  
Local Area ◽  
Monopole Antenna ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Directional Radiation ◽  
Resonant Modes

In this paper, an asymmetric coplanar strip (ACS)-fed quad-band monopole antenna for the global positioning system (GPS), wireless local area network (WLAN), and worldwide interoperability for microwave access (WiMAX) applications is proposed. It is composed of an F-shaped monopole and a partial ground plane, which are both printed on one side of a low-cost FR4 substrate with a compact volume of 40 × 20 × 1.6 mm3. By cutting an open-ended Γ-shaped slot into the F-shaped monopole, four distinct resonant modes are successfully generated. The design process, especially the geometrical configuration of the critical Γ-shaped slot is studied in detail. The proposed antenna has been fabricated and experimental results show that the −10 dB impedance bandwidth can fully cover the 1.575-GHz GPS (1.57–1.59 GHz), 2.4/5.2/5.8-GHz WLAN (2.4–2.485, 5.15–5.35, and 5.725–5.825 GHz), and 2.5/3.5/5.5-GHz WiMAX (2.50–2.69, 3.30–3.70, and 5.25–5.85 GHz) applications with nearly omni-directional radiation patterns and satisfactory gains.

COMPACT DUAL-BAND DIELECTRIC RESONATOR ANTENNA FOR 2.4/5.8 GHZ WLAN APPLICATIONS

2015 ◽  
Vol 77 (10) ◽  
Author(s):  
A. Mataria ◽  
M. R. Kamarudin ◽  
M. Khalily
Keyword(s):  
Radio Frequency Identification ◽  
Dielectric Resonator ◽  
Local Area Network ◽  
Monopole Antenna ◽  
Dual Band ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Dielectric Resonator Antenna ◽  
Dual Band Antenna

Design of a Dual-Band Dielectric Resonator Antenna (DRA) for the radio-frequency identification (RFID) and wireless local area network (WLAN) is presented. The necessity of a compact sized dual-band antenna is to allow the manufacturers to produce small size high-performance WLAN access points. The proposed antenna consists of printed T-Shaped monopole antenna and rectangular dielectric resonator to operate simultaneously at 2.4 and 5.8 GHz. The monopole antenna was printed on a standard 1.6 mm FR4 substrate material. Impedance bandwidth for -10 dB return loss in the 2.35 GHz and 5.86 GHz center frequency reaches 0.25 GHz (2.22 GHz to 2.47 GHz) and 0.28 GHz (5.72 GHz to 6 GHz), respectively. A good agreement is achieved between measured and simulated results.  This compact antenna fed by a 50 Ω microstrip line is a low-profile and easy to manufacture antenna.

Dual-Band Flexible Antenna for WLAN/WiMAX Applications

2019 ◽  
Vol 09 ◽  
Author(s):  
Poonam Thanki ◽  
Falguni Raval
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Flexible Substrate ◽  
Ground Plane ◽  
Local Area ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Compact Size ◽  
Flexible Antenna

Aims: This paper presents the development of Co-Planar Waveguide (CPW) fed dualband, compact, and flexible antenna. The antenna is designed on flexible substrate jeans; so, it is suitable for wearable applications. <p></p> Objectives: The proposed antenna generates dual-band at 3.36GHz –3.61GHz and at 5.01 GHz – 5.18 GHz. The antenna has a compact size of 40×30 mm2. The antenna consists of a rectangular patch having a slot which is responsible for the first band and slot in the ground plane which is responsible for the second band. <p></p> Methods: By optimizing the dimensions, the antenna gives dual-band at 3.5 GHz and 5.1 GHz with impedance bandwidth of 250 MHz and 170 MHz, respectively. The performance of the antenna such as gain and radiation pattern over the operating band has been also discussed. <p></p> Conclusion: This proposed antenna with the first band at 3.5GHz is suitable for Wi-MAX (Worldwide Interoperability for Microwave Access) and second band at 5.1GHz is suitable for Higher Wireless Local Area Network applications (WLAN). <p></p>

scholarly journals Design of Dual-Band and Low-Profile SIW Cavity-Backed Slot Antenna for 5G Applications

2021 ◽  
Author(s):  
Amit Kumar ◽  
Amit Kumar Singh
Keyword(s):  
Ground Plane ◽  
Effective Length ◽  
Dual Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Radiation Characteristics ◽  
Antenna Performance ◽  
Dual Band Antenna ◽  
Low Profile ◽  
Via Hole

In this communication, the design of a dual-band and low-profile SIW cavity-backed slot antenna operating at K-band and Ka-band has been proposed to expand the Impedance bandwidth (IBW) of the antenna. The dual-band antenna consists of the SIW cavity with two parallel slots etched on the conductor’s ground plane. To obtain a dual-band, higher-order hybrid modes are tuned and combined to form the second band of the proposed antenna with a broader bandwidth. For dual-band antenna, fractional bandwidth of 5.26% and 6.15% are attained with the maximum gain of 5.45 dBi and 6.15 dBi at 24.7 GHz and 27.8 GHz, respectively. A cavity-backed antenna using via-hole and the slot has been proposed to improve an IBW and other antenna performance parameters. Via-hole establishes a connection between the top and bottom surfaces of the cavity, creating a new path for the current to flow by shortening the slot’s effective length. An IBW of 4.2 GHz (15.32%), where a gain of 7.8 dBi and 9.2 dBi have been realized at 25.9 GHz and 28.8 GHz, respectively. Isolation of less than 25 dB has been achieved through simulation. In terms of λ0, the overall volumetric dimension of the proposed antenna is 1.68 λ0×1.31λ0×0.04λ0. The proposed design demonstrates better performance in terms of antenna parameters, including compactness, good radiation characteristics, enhanced impedance bandwidth, and higher gain than the latest state of the art.

A Dual-Band LTCC Antenna with Cross Circuitous Structure

2012 ◽  
Vol 601 ◽  
pp. 163-167
Author(s):  
Hong Gang Hao ◽  
Wen Shuai Hu ◽  
Hai Yan Tian ◽  
Yi Ren
Keyword(s):  
Low Temperature ◽  
Frequency Band ◽  
Dual Band ◽  
Operating Frequency ◽  
Impedance Bandwidth ◽  
The Novel ◽  
Radiation Patterns ◽  
Directional Radiation ◽  
Dual Band Antenna ◽  
Layer Structures

A compact dual-band antenna for ISM (2.45GHz) or WiMAX (3.15GHz) applications by low-temperature co-fired ceramic (LTCC) technology is presented in this paper. The proposed antenna is composed of multi-layer structures to reduce the sizes effectively. The simulated results show that the dimensions of the antenna are 11×4.2×1.2mm3, with the 2:1 VSWR impedance bandwidth definition, the lower and upper band have the bandwidth of 80 and 90 MHz. The novel antenna has realized miniaturization and omni-directional radiation patterns across the whole operating frequency band.

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