Low-cost flat metal-plate dipole antenna for 2.4/5-GHz WLAN operation

2008 ◽  
Vol 50 (6) ◽  
pp. 1686-1687 ◽  
Author(s):  
Saou-Wen Su ◽  
Jui-Hung Chou
Keyword(s):  
Low Cost ◽  
Dipole Antenna ◽  
Metal Plate ◽  
5 Ghz

scholarly journals Optically transparent and very thin structure against electromagnetic pulse (EMP) using metal mesh and saltwater for shielding windows

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Duy Tung Phan ◽  
Chang Won Jung
Keyword(s):  
Electromagnetic Pulse ◽  
Low Cost ◽  
High Energy ◽  
Metal Plate ◽  
Optical Transparency ◽  
Shielding Effectiveness ◽  
Concrete Wall ◽  
Metal Mesh ◽  
Wide Range ◽  
Optically Transparent

AbstractAn electromagnetic pulse (EMP) with high energy can damage electronic equipment instantly within a wide range of thousands of kilometers. Generally, a metal plate placed inside a thick concrete wall is used against an EMP, but it is not suitable for an EMP shielding window, which requires not only strong shielding effectiveness (SE) but also optical transparency (OT). In this paper, we propose a very thin and optically transparent structure with excellent SE for EMP shielding window application. The proposed structure consists of a saltwater layer held between two glass substrates and two metal mesh layers on the outside of the glass, with a total thickness of less than 1.5 cm. The SE and OT of the structure are above 80 dB and 45%, respectively, which not only meet the requirement of EMP shielding for military purposes but also retain the procedure of good observation. Moreover, the OT of the structure can be significantly improved using only one metal mesh film (MMF) layer, while the SE is still maintained high to satisfy the required SE for home applicants. With the major advantages of low cost, optical transparency, strong SE, and flexible performance, the proposed structure can be considered a good solution for transparent EMP shielding windows.

scholarly journals Compact Uniplanar Multi Feed Multi Band ACS Monopole Antenna Loaded With Multiple Radiating Branches for Portable Wireless Devices

2018 ◽  
Vol 7 (2) ◽  
pp. 68-75 ◽  
Author(s):  
P. N. Vummadisetty ◽  
A. Kumar
Keyword(s):  
Low Cost ◽  
Impedance Matching ◽  
Ground Plane ◽  
Wireless Devices ◽  
Research Article ◽  
Resonant Modes ◽  
Wireless Device ◽  
Printed Monopole ◽  
5 Ghz ◽  
Multi Band

This research article presents, a compact 0.19 λ x 0.32 λ size ACS fed printed monopole wideband antenna loaded with multiple radiating branches suitable for LTE2300/WiBro, 5 GHz WLAN and WiMAX applications. The proposed triple band uniplanar antenna encompasses of C shaped strip, L shaped strip, rectangular shaped strip and a lateral ground plane. All the radiating strips and ground plane are etched on the 26 × 15 m size low cost FR4 epoxy substrate. This designed geometry evoked three independent reonances at 2.3 GHz, 3.5 GHz and 5.5 GHz with precise impedance matching over each operating band. The reflection coefficient ( ) response of the presented antenna demonstrates three distinct resonant modes associated with -10 dB bandwidths are about 2.24-2.40 GHz, 3.38-3.83 GHz and 5.0-6.25 GHz respectively. From the study, it is also observed that the proposed design works perfect with microstrip as well as CPW feedings. Hence the designed Multi Feed Multi Band (MFMB) antenna can be easily deployed in to any portable wireless device that works for 2.3/3.5/ 5 GHz frequency bands.

A dual-band printed dipole antenna for IMT-2000 and 5-GHz WLAN applications

2008 ◽  
Vol 50 (10) ◽  
pp. 2585-2587 ◽  
Author(s):  
Hatem Rmili ◽  
Jean-Marie Floc'h ◽  
Philippes Besnier ◽  
Mohamed Drissi
Keyword(s):  
Dipole Antenna ◽  
Dual Band ◽  
5 Ghz

Reconfigurable Antenna

2016 ◽  
pp. 237-263
Author(s):  
Mohamad Kamal A Rahim ◽  
Huda A. A. Majid ◽  
Mohamad Rijal Hamid
Keyword(s):  
Communication Systems ◽  
Low Cost ◽  
Wireless Systems ◽  
Reconfigurable Antennas ◽  
Effective Length ◽  
Slot Antenna ◽  
Wireless Communication Systems ◽  
Reconfigurable Antenna ◽  
5 Ghz ◽  
Narrow Bands

Reconfigurable antennas have attracted a lot of attention especially in future wireless communication systems. Superior features such as reconfigurable capability, low cost, multi-purpose functions and size miniaturization have given reconfigurable antennas advantage to be integrated into a wireless systems. In this chapter, two types of reconfigurable antennas are discussed. First, frequency reconfigurable narrowband microstrip slot antenna (FRSA) is presented. The proposed antenna is designed to operate at six reconfigurable frequency bands from 2 GHz to 5 GHz with bidirectional radiation pattern. The second antenna design is frequency reconfigurable narrowband patch-slot antenna (FRPSA) is presented. The antenna is a combination of a microstrip patch and slot antenna. Nine different narrow bands are produced by tuning the effective length of the slot. The performances of the antenna in term of simulated and measured results are presented. In conclusion, good agreement between the simulated and measured results has been attained.

Low Cost System Design to Measure and Analyze of Temperature Rise Caused by 2450 MHz RF Energy in Human Phantom Model

2016 ◽  
Vol 27 ◽  
pp. 92-102 ◽  
Author(s):  
Mesud Kahriman ◽  
Ozlem Coskun ◽  
Esin Yavuz
Keyword(s):  
Energy Source ◽  
Temperature Rise ◽  
Daily Life ◽  
Low Cost ◽  
Communication Technologies ◽  
Dipole Antenna ◽  
Good Correspondence ◽  
Phantom Model ◽  
Cost System ◽  
Rf Energy

In recent years humans are more exposed to human-made fields than natural fields with developing technologies. Especially, widespread of wireless communication technologies in all areas of daily life and getting closer to sensitive organs like brain caused an increase in possible risks and worries about human health. In the study, a temperature measurement card has been designed and produced with the aim of observing the temperature rise at the phantom model generated by EM energy source. To that end, we present a study on the temperature rise of small dipole antenna (2450 MHz) that operate close to a user’s head (1, 4 and 7 cm). We found good correspondence between the temperature rise values evaluated in the phantom heads. According to the results of measure, expected temperature rise in the tissue exposed to RF energy may varies to the distance between radiated source and tissue.

scholarly journals A Broadband THz On-Chip Transition Using a Dipole Antenna with Integrated Balun

Electronics ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 236 ◽  
Author(s):  
Wonseok Choe ◽  
Jinho Jeong
Keyword(s):  
Integrated Circuits ◽  
Insertion Loss ◽  
Low Cost ◽  
Three Dimensional ◽  
Equivalent Circuit Model ◽  
Dipole Antenna ◽  
Impedance Match ◽  
Inp Substrate ◽  
On Chip ◽  
High Dielectric

A waveguide-to-microstrip transition is an essential component for packaging integrated circuits (ICs) in rectangular waveguides, especially at millimeter-wave and terahertz (THz) frequencies. At THz frequencies, the on-chip transitions, which are monolithically integrated in ICs are preferred to off-chip transitions, as the former can eliminate the wire-bonding process, which can cause severe impedance mismatch and additional insertion loss of the transitions. Therefore, on-chip transitions can allow the production of low cost and repeatable THz modules. However, on-chip transitions show limited performance in insertion loss and bandwidth, more seriously, this is an in-band resonance issue. These problems are mainly caused by the substrate used in the THz ICs, such as an indium phosphide (InP), which exhibits a high dielectric constant, high dielectric loss, and high thickness, compared with the size of THz waveguides. In this work, we propose a broadband THz on-chip transition using a dipole antenna with an integrated balun in the InP substrate. The transition is designed using three-dimensional electromagnetic (EM) simulations based on the equivalent circuit model. We show that in-band resonances can be induced within the InP substrate and also prove that backside vias can effectively eliminate these resonances. Measurement of the fabricated on-chip transition in 250 nm InP heterojunction bipolar transistor (HBT) technology, shows wideband impedance match and low insertion loss at H-band frequencies (220–320 GHz), without in-band resonances, due to the properly placed backside vias.

Stretchable 5 GHz Dipole Antenna Using Silver Composite Material

2019 ◽  
Vol 11 (12) ◽  
pp. 1719-1722
Author(s):  
InMu Kim ◽  
Ji Hun Yuk ◽  
Sung-Hoon Choa
Keyword(s):  
Composite Material ◽  
Conductive Polymer ◽  
Dipole Antenna ◽  
Polymer Composite Material ◽  
Cyclic Stretching ◽  
Screen Printing Technique ◽  
Mechanical Durability ◽  
Endurance Tests ◽  
Highly Stretchable ◽  
5 Ghz

A highly stretchable small-size 5 GHz dipole antenna is presented for wearable and mobile applications. A stretchable dipole antenna was fabricated using conductive polymer composite material composed of Ag flake filler and polyester binder. The dipole antenna was printed on a stretchable polyurethane substrate using a simple and inexpensive screen-printing technique. The stretchability and durability of the dipole antenna were evaluated by the stretching and cyclic stretching tests. The stretchable dipole antenna showed excellent stretchability and RF performances up to a tensile strain of 25%. The stretchable dipole antenna also exhibited outstanding mechanical durability in the 10,000-cycle cyclic stretching endurance tests.

A compact uniplanar ACS fed multi band low cost printed antenna for modern 2.4/3.5/5 GHz applications

2017 ◽  
Vol 24 (3) ◽  
pp. 1413-1422 ◽  
Author(s):  
Arvind Kumar ◽  
Praveen Vummadisetty Naidu ◽  
Vinay Kumar
Keyword(s):  
Low Cost ◽  
Printed Antenna ◽  
5 Ghz ◽  
Multi Band
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