scholarly journals Dual-Element PIFA Design with Dual Shorting Pins for Multiband Communication Devices

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Muhammad Sajjad Ahmad ◽  
Che Young Kim
Keyword(s):  
Ground Plane ◽  
Antenna Design ◽  
Perfect Electric Conductor ◽  
The Finite Element Method ◽  
Electric Conductor ◽  
Low Profile ◽  
Shorting Pin ◽  
Communication Devices ◽  
Fixed Phase ◽  
Element Array

A low profile multiband resonant, dual-element array antenna is proposed for use in handheld communication devices. The proposed antenna comprises two dual shorting pin planar inverted-F antennas and a folded ground plane which operates as a perfect electric conductor case. The feeding scheme adopted for the proposed design produces a fixed phase difference between two antenna elements of the design to achieve an ultrawide bandwidth and a flexible radiation pattern. The proposed antenna design is simulated with commercially available software, which is based on the finite element method. The resonant frequency bands covered are GSM850/900, DCS1800, PCS1900, UMTS2100, and LTE2300/2600 MHz. Details of the design considerations for the proposed antenna are described and the simulated and measured results are presented and discussed, which are in agreement.

scholarly journals A Triple-Band Antenna Loaded with Reflector Surface for WLAN and 5G Applications

2020 ◽  
pp. 729-734
Author(s):  
Tengfei Hu ◽  
◽  
Zhenni Pan ◽  
Megumi Saitou ◽  
Jiang Liu ◽  
...  
Keyword(s):  
Base Stations ◽  
Antenna Design ◽  
Perfect Electric Conductor ◽  
Magnetic Conductor ◽  
Electric Conductor ◽  
Lower Band ◽  
Low Profile ◽  
Reflector Surface ◽  
Profile Characteristics ◽  
Triple Band

In this paper, a novel triple-band antenna with reflector surface which has the property of both artificial magnetic conductor (AMC) surface and perfect electric conductor (PEC) for WLAN and Sub-6G 5G applications is proposed. The presented antenna is composed of two parts: the AMC surface and the microstrip-fed printed dipole. Baluns are used to excite the dipoles. This antenna design combines the advantages of AMC and PEC. In lower band and middle band, the inserted board works as AMC surface. This AMC surface can help the antenna to achieve unidirectional radiation pattern and low-profile characteristics. While at upper band the antenna works as PEC surface. PEC surface increases the gain of the antenna in upper band. As a result, the proposed antenna can offer an impedance band from 2.39 GHz to 2.63 GHz and from 3.61 GHz to 3.72 GHz and from 5.61 GHz to 5.84 GHz when the S11 is less than - 10dB. Stable radiation patterns with peak gain of 5.6 dBi, 6.5 dBi and 9.6 dBi are obtained in lower band, middle band and upper band, respectively. The proposed antenna can be used for multiband base stations for WLAN and 5G applications.

scholarly journals CPW-fed circularly-polarized antenna array with high front-to-back ratio and low-profile

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 651-655 ◽  
Author(s):  
Yilin Liu ◽  
Kama Huang
Keyword(s):  
Antenna Array ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Axial Ratio ◽  
Antenna Design ◽  
Impedance Bandwidth ◽  
Feeding Method ◽  
Circularly Polarized ◽  
Low Profile ◽  
Novel Design

Abstract A novel design of a coplanar waveguide (CPW) feed antenna array with circular polarization (CP) and a high front-to-back ratio is described. The proposed CP array is achieved by using a compact CPW–slotline transition network etched in the ground plane. The measured results show that this kind of feeding method can improve the impedance bandwidth, as well as the axial ratio bandwidth of the CP antenna array and provide adequate gain. The proposed array can achieve a 6.08% impedance bandwidth and a 4.10% CP bandwidth. Details of the antenna design and experimental results are presented and discussed.

scholarly journals A Low Profile Wideband Log Periodic Microstrip Antenna Design for C-Band Applications

2019 ◽  
Vol 8 (2) ◽  
pp. 48-52 ◽  
Author(s):  
M. Yerlikaya ◽  
S. S. Gültekin ◽  
D. Uzer
Keyword(s):  
Dielectric Constant ◽  
Microstrip Antenna ◽  
Microstrip Line ◽  
Ground Plane ◽  
Antenna Design ◽  
Tangent Loss ◽  
Low Profile ◽  
Measurement Results ◽  
Simulation Results ◽  
5 Ghz

In this study, a wideband low profile microstrip antenna design for C-band applications is presented. The proposed antenna consists of a monopol log periodic patch in the equilateral triangular dimensions with the microstrip line fed and a rectangular ground plane. The antenna has 9×19.8 mm2 overall size, thickness of 1.6 mm and 4.3 dielectric constant. According to the simulation results, the proposed antenna has a very wide bandwidth while operating in the frequency band of 4.25-7.95 GHz and 5 GHz resonance frequency. The proposed antenna was also prototyped on FR4 substrate with the 0.02 tangent loss and the measurement results were quite similar by the simulated results.

scholarly journals Bandwidth-Enhanced Low-Profile Antenna with Parasitic Patches

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Son Xuat Ta ◽  
Kam Eucharist Kedze ◽  
Dao Ngoc Chien ◽  
Ikmo Park
Keyword(s):  
Ground Plane ◽  
Axial Ratio ◽  
Radiation Efficiency ◽  
Electric Conductor ◽  
Physical Size ◽  
Bandwidth Enhancement ◽  
Antenna Performance ◽  
Low Profile ◽  
Linearly Polarized ◽  
The Cost

This paper presents low-profile broadband antennas, which are composed of four parasitic patches placed between planar radiators and a perfect electric conductor ground plane. Two types of planar radiators, a conventional dipole and a crossed dipole, are employed to produce linearly polarized (LP) and circularly polarized (CP) radiations, respectively. The radiator and parasitic patches are realized on thin substrates to lower the cost. Owing to the presence of parasitic patches, the antenna performance improves in terms of profile reduction, resonant frequency decrease, and bandwidth enhancement. These improvements are discussed and confirmed computationally and experimentally. The LP design with the overall dimensions of 120 mm × 120 mm × 16.3 mm (0.64λ0 × 0.64λ0 × 0.087λ0 at 1.6 GHz) has a |S11| < −10 dB bandwidth of 1.465–1.740 GHz (17.2%), a broadside gain of 8.5–8.8 dBi, and a radiation efficiency > 96%. The CP design, which has the same physical size as the LP case, has a |S11| < −10 dB bandwidth of 1.388–1.754 GHz (23.3%), a 3 dB AR (axial ratio) bandwidth of 1.450–1.685 GHz (15.0%), a right-hand CP broadside gain of 7.8–8.7 dBic, and a radiation efficiency > 90%.

scholarly journals Investigation of printed slot antennas based on Euclidean geometries

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yaqeen S. Mezaal
Keyword(s):  
Ground Plane ◽  
Antenna Design ◽  
Fractal Antenna ◽  
Slot Antennas ◽  
Wireless Applications ◽  
Low Profile ◽  
Parametric Studies ◽  
Fractal Antennas ◽  
Parametric Analyses

AbstractEuclidean and fractal terms are mathematically and physically important terms in antenna design, but rarely reported studies had discussed these terms together in antenna design in their texts. This paper first gives an overview of Euclidean and fractal antennas with useful and satisfactory facts. Four printed slot antennas are then studied using Euclidean slot shapes printed in the ground plane with and without Euclidean patches using FR4 substrate. These antennas are employed to investigate their suitability as simple alternatives to complicated fractal geometries and their specific formulas. Parametric analyses with feedline lengths and patch scaling aspects are adopted to generate single, dual, and multiband responses. These parametric studies provide different outcomes and choices for antenna electrical specifications suitable for various wireless applications. It is clear that inserting Euclidean patches to the printed slot in the ground plane influence inducing multiple operating bands as similar as multiband fractal antenna, but without using specific formulas or complicated outlines. All proposed antennas have low-profile topologies, good compactness, and more competitive electrical specifications than many reported fractal antennas. The simulations of the proposed printed slot antennas are in good compatibility with the measurements.

scholarly journals A Novel Multiband Miniature Planar Inverted F Antenna Design for Bluetooth and WLAN Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
J. M. Jeevani W. Jayasinghe ◽  
Disala Uduwawala
Keyword(s):  
Genetic Algorithm ◽  
Genetic Algorithms ◽  
Ground Plane ◽  
Antenna Design ◽  
Algorithm Optimization ◽  
Genetic Algorithm Optimization ◽  
Shorting Pin ◽  
5 Ghz ◽  
Patch Geometry ◽  
Compact Planar

A novel compact planar inverted F antenna (PIFA) optimized using genetic algorithms for 2.4 GHz (Bluetooth) and 5 GHz (UNII-1, UNII-2, UNII-2 extended, and UNII-3) bands is presented. The patch with a shorting pin is on a20×7×0.762 mm3substrate, which is suspended in air 5 mm above a30×7 mm2ground plane. Genetic algorithm optimization (GAO) is used to optimize the patch geometry, feed position, and shorting pin position simultaneously. Simulations are carried out by using HFSS and a prototype antenna is fabricated to compare the measurements with the simulations. The antenna shows fractional impedance bandwidths of 4% and 21% and gains of 2.5 dB and 3.2 dB at lower and upper bands, respectively.

scholarly journals A Novel 5G LTE Antenna Design for Portable Devices

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Wei-Chiang Jhang ◽  
Jwo-Shiun Sun
Keyword(s):  
Ground Plane ◽  
Wireless Systems ◽  
Resonant Mode ◽  
Copper Plate ◽  
Antenna Design ◽  
Portable Devices ◽  
Low Profile ◽  
Resonant Modes ◽  
Simulated System ◽  
Portable Communication

This paper presents the low profile, planar, and small-size antenna design for WWAN, LTE, and 5G (5th generation wireless systems) for use in portable communication equipment. The antenna occupies only 65 × 13 × 0.4 mm3, and the antenna is combined with a 200 × 260 mm2 copper plate to simulated system ground plane. In the low band, a direct-fed right-side arm and a coupled-fed arm implemented can excite a 1/4 λ fundamental resonant mode at 0.85 and 0.76 GHz to cover 0.698–0.96 GHz and upper 3/4 λ and 5/4 λ resonant modes are controlled by L-shaped element at 2.34, 2.69, 3.4, and 4.0 GHz to cover 1.71–2.69 GHz and 3.2–4.2 GHz. The direct-fed left-side arm produced 1/4 λ to cover 5.15–5.85 GHz. In far-field measured, peak gain and efficiency in low, middle, and high bands are 0.43–5.67 dBi and 55–86%. Finally, experiments demonstrate that the present antenna exhibits a good performance for portable devices.

Low-profile, wideband dual-polarized 1 × 2 MIMO antenna with FSS decoupling technique

2021 ◽  
pp. 1-7
Author(s):  
B. Anudeep ◽  
K. Krishnamoorthy ◽  
P. H. Rao
Keyword(s):  
Near Field ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Wide Band ◽  
Frequency Selective Surface ◽  
Dual Band ◽  
Electric Conductor ◽  
Mimo Antenna ◽  
Low Profile ◽  
Dual Polarized

Abstract A low-profile, wideband dual-polarized 1 × 2 multiple-input-multiple-output (MIMO) antenna with frequency selective surface (FSS) decoupling technique is presented. Low profile is realized with two different artificial magnetic conductor (AMC) cells out of which one operates at 3.5 GHz and other with dual band at 3.1 and 4.5 GHz. The proposed antenna height is maintained at 0.125λ0 which is significantly reduced when compared with the conventional perfect electric conductor (PEC) ground plane. Wideband dual polarization is enabled by two pairs of bow-tie antenna elements surrounded by a square ring placed in the orthogonal orientation. To mitigate the near-field coupling in 1 × 2 MIMO an FSS wall is constructed with wide band stop characteristics from 2.85 to 4.75 GHz. Measured results show by inserting FSS wall vertically, coupling reduction is improved by 27 dB over the existing coupling and the antenna exhibits a bandwidth of 57.14% (2.95–4.95 GHz) for VSWR<2 with port isolation of more than 25 dB for entire band of operation.

scholarly journals Multishorting Pins PIFA Design for Multiband Communications

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Muhammad Sajjad Ahmad ◽  
C. Y. Kim ◽  
J. G. Park
Keyword(s):  
Ground Plane ◽  
Ability To Work ◽  
Wireless Applications ◽  
Adverse Conditions ◽  
Low Profile ◽  
Proposed Model ◽  
Communication Devices ◽  
Improved Characteristics

A novel PIFA model with multiple shorting pins is proposed for multiband, low profile wireless applications, which has the ability to work in adverse conditions. The proposed model has a planar radiating sheet, a ground plane, and sides covered with PEC boundaries. The substrate inside theantenna boxis tempered in order to improve the bandwidth and gain. The enhancements applied to the proposed PIFA model show improved characteristics for this PIFA model and make it a versatile candidate for handheld, low profile, and multiband resonant communication devices. Pertinent communication devices are those that work with GSM 850/900, UMTS 850/900/1700/1900/2100, LTE 2300/2500, and ISM 2400 bands used for Bluetooth and WLAN.

Flexible Dual Band Dipole Antenna with Electromagnetic Band Gap

2017 ◽  
Vol 5 (3) ◽  
pp. 593
Author(s):  
Maisarah Abu ◽  
Siti Adlina Md Ali ◽  
Najmiah Radiah Mohamad ◽  
Maizatun Muhamad
Keyword(s):  
Resonant Frequency ◽  
Band Gap ◽  
Ground Plane ◽  
Dipole Antenna ◽  
Dual Band ◽  
Electromagnetic Band Gap ◽  
Low Profile ◽  
Communication Devices ◽  
Profile Characteristics

Flexible dual band dipole antenna incorporates with Electromagnetic Band Gap (EBG) to improve the well-known low profile characteristics of dipole antenna. The antenna operates at 2.45 GHz and 5.8 GHz which is printed on Fast film with 0.13 mm thickness. While the EBG is designed at 5.8 GHz by using Arlon AD350 with 1.016 mm thickness. EBG works as a ground plane for the antenna and helps by improving the realized gainandradiation pattern. Besides, EBG also act as a filter as the resonant frequency of the antenna is close to the EBG band gap. The 2.45 GHz of is eliminated while the performances of antenna at 5.8 GHz is improved. Thus the realized gain is increased up to 6.86 dB and the back lobes is clearly reduced. The designs of dipole antenna with EBG application such as Wifi and others on-body communication devices.

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