scholarly journals A Compact UWB Antenna with a Quarter-Wavelength Strip in a Rectangular Slot for 5.5 GHz Band Notch

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Pichet Moeikham ◽  
Chatree Mahatthanajatuphat ◽  
Prayoot Akkaraekthalin
Keyword(s):  
Frequency Band ◽  
Communication Systems ◽  
Notch Filter ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Uwb Antenna ◽  
Antenna Structure ◽  
Rectangular Slot ◽  
Quarter Wavelength ◽  
Uwb Applications

The limitation of the electromagnetic interferences (EMIs) caused by UWB radiating sources into WLAN/WiMAX communication systems operating in the frequency band located around 5.5 GHz requires the adoption of appropriate design features. To this purpose, a notch filter integrated into an UWB antenna, which is able to ensure a better electrical insulation between the two mentioned communication systems with respect to that already presented by the authors Moeikham et al. (2011), is proposed in this paper. The proposed filter, consisting in a rectangular slot including a quarter-wavelength strip integrated on the lower inner edge of the UWB radiating patch, is capable of reducing the energy emission in the frequency range between 5.1 and 5.75 GHz resulting in lower EMIs with sensible electronic equipments working in this frequency band. The antenna structure has no need to be tuned after inserting the rectangle slot with a quarter-wavelength strip. The proposed antenna has potential to minimize the EMIs at a frequency range from 5.1 to 5.75 GHz. The radiation patterns are given nearly omnidirectional in plane and likely bidirectional in plane at all frequencies by the proposed antenna. Therefore, this antenna is suitable to apply for various UWB applications.

Hex-Sided Rounded Dipole Antenna (HSRDA) For UWB Applications

Frequenz ◽  
2016 ◽  
Vol 70 (3-4) ◽  
Author(s):  
Sarthak Singhal ◽  
Nand Kishor Verma ◽  
Amit Kumar Singh
Keyword(s):  
Impedance Matching ◽  
Dipole Antenna ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Antenna Structure ◽  
Simulation Results ◽  
Uwb Applications ◽  
Bow Tie ◽  
Good Agreement

AbstractA hex-sided rounded dipole antenna (HSRDA) for UWB applications is presented. It is designed by the addition of semi-elliptical patch sections at the edges of a square bow-tie antenna. The antenna structure is fed by a modified microstrip feedline for better impedance matching. An impedance bandwidth of 2.9–11.4 GHz is achieved. The antenna structure has quasi omnidirectional radiation patterns and reasonable gain over the same frequency range. A good agreement between the experimental and simulation results is observed. The proposed antenna structure has miniaturized size for the same bandwidth as compared to already reported antenna structures.

Closed Loop Resonator Based Compact UWB Antenna with Single Notched Band Varying between WLAN and X-band for UWB Applications

Frequenz ◽  
2020 ◽  
Vol 74 (5-6) ◽  
pp. 201-209
Author(s):  
Mohammad Ahmad Salamin ◽  
Sudipta Das ◽  
Asmaa Zugari
Keyword(s):  
Closed Loop ◽  
Ground Plane ◽  
Frequency Range ◽  
Uwb Antenna ◽  
Notched Band ◽  
X Band ◽  
Compact Size ◽  
Simulation Results ◽  
Uwb Applications ◽  
Good Agreement

AbstractIn this paper, a novel compact UWB antenna with variable notched band characteristics for UWB applications is presented. The designed antenna primarily consists of an adjusted elliptical shaped metallic patch and a partial ground plane. The proposed antenna has a compact size of only 17 × 17 mm2. The suggested antenna covers the frequency range from 3.1 GHz to 12 GHz. A single notched band has been achieved at 7.4 GHz with the aid of integrating a novel closed loop resonator at the back plane of the antenna. This notched band can be utilized to alleviate the interference impact with the downlink X-band applications. Besides, a square slot was cut in the loop in order to obtain a variable notched band. With the absence and the existence of this slot, the notched band can be varied to mitigate interference of the upper WLAN band (5.72–5.82 GHz) and X-band (7.25–7.75 GHz) with UWB applications. A good agreement between measurement and simulation results was achieved, which affirms the appropriateness of this antenna for UWB applications.

scholarly journals A Compact Vivaldi Shaped Partially Dielectric Loaded TEM Horn Antenna for UWB Communication

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Mustafa İlarslan ◽  
A. Serdar Türk ◽  
Salih Demirel ◽  
M. Emre Aydemir ◽  
A. Kenan Keskin
Keyword(s):  
Communication Systems ◽  
Horn Antenna ◽  
High Gain ◽  
Simulation Software ◽  
Antenna Structure ◽  
Horn Antennas ◽  
Compact Antenna ◽  
Uwb Antennas ◽  
Tem Horn ◽  
Uwb Applications

Ultrawideband (UWB) antennas are of huge demand and Vivaldi antennas as well as the TEM horn antennas are good candidates for UWB applications as they both have relatively simple geometry and high gain over a wide bandwidth. The aim of this study is to design a compact antenna that achieves maximum gain over a bandwidth between 1.5 and 10.6 GHz while minimizing its size. The idea is to make use of combined respective advantages of Vivaldi and TEM horn antennas to achieve the desired goals by shaping the TEM horn antenna to look like a Vivaldi antenna. The antenna structure is modified by a dielectric load in the center to increase the gain bandwidth. It is placed in a surrounding box made of PEC material to reduce the undesired side lobes and to obtain more directive radiation pattern. The simulations are performed by using the CST STUDIO SUITE electromagnetic (EM) simulation software and they are later verified by the actual measurements. The Vivaldi shaped partially dielectric loaded (VS-PDL) TEM horn antenna is proposed as a compact UWB antenna for systems using the newly established UWB band and also for the communication systems of popular bands like ISM, Wi-Fi, and GSM.

scholarly journals A CPW-Fed Dual-Band-Notched Antenna with Sharp Skirt Selectivity for UWB Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Dacheng Dong ◽  
Shaojian Chen ◽  
Zhouying Liao ◽  
Gui Liu
Keyword(s):  
Group Delay ◽  
Coplanar Waveguide ◽  
Dual Band ◽  
Back Surface ◽  
Radiation Patterns ◽  
Uwb Antenna ◽  
Ieee 802.11A ◽  
Notched Band ◽  
Measurement Results ◽  
Uwb Applications

A coplanar waveguide- (CPW-) fed dual-band-notched antenna with sharp skirt selectivity for ultrawideband (UWB) applications is presented. The proposed antenna is composed of a radiant patch with a C-shaped slot and a C-shaped stub on the back surface of the substrate. By using the C-shaped slot and the C-shaped stub, dual-band-notched characteristics can be generated. In this way, a more practical and effective approach to design an UWB antenna with sharp notched-band-edge selectivity is developed. The measurement results show dual notched bands of 4.96–5.42 GHz and 5.71–5.91 GHz, which can reject the interference between IEEE 802.11a bands (5.15–5.35 GHz and 5.725–5.825 GHz) and UWB systems. The fabricated antenna shows good omnidirectional radiation patterns with acceptable gain and group delay.

Design of an Ultra-Wideband Wilkinson Power Divider in Modern Electronic Engineering

2015 ◽  
Vol 713-715 ◽  
pp. 1048-1051
Author(s):  
Xin Cao ◽  
Zong Xi Tang
Keyword(s):  
Communication Systems ◽  
Ultra Wideband ◽  
Power Divider ◽  
Frequency Range ◽  
Resonance Property ◽  
Electronic Engineering ◽  
Quarter Wavelength ◽  
Working Frequency ◽  
Wilkinson Power Divider ◽  
Good Agreement

In this paper, an ultra-wideband Wilkinson power divider based on the quarter wavelength transformation is proposed. The proposed power divider utilizes the resonance property of the four stage quarter wavelength microstrip stubs to increase the isolation between the to output ports. As the measured results show that, the power divider has the insertion loss less than 1.3dB with the minimum isolation 15.4dB in the working frequency range from 1GHz to 5GHz. The simulated results and measured results are in good agreement and the proposed power divider can be applied in the communication systems in modern electronic engineering.

scholarly journals A Compact Size 4–19.1 GHz Heart Shape UWB Antenna with Triangular Patches

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Gokmen Isik ◽  
Serkan Topaloglu
Keyword(s):  
Radiation Pattern ◽  
Input Impedance ◽  
Patch Antennas ◽  
Frequency Range ◽  
Uwb Antenna ◽  
Radiation Characteristics ◽  
Narrow Bandwidth ◽  
Compact Size ◽  
Uwb Applications

An ultrawideband antenna is designed, simulated, and realized. To overcome the narrow bandwidth characteristics of basic patch antennas, the structure of the radiation pattern is optimized by the aid of elliptical and rectangular patches. Also triangular patches are applied to the antenna edge in order to enhance the VSWR and gain properties. A typical VSWR of 1.5 (less than 2 in the whole frequency range) and a typical gain of 2 dBi (mainly above 1 dBi in the whole frequency range) are observed. The simulations present that the designed antenna has a bandwidth ratio of ~5 : 1 within the frequency range of 4–19.1 GHz with compact dimensions of 25 × 26 mm2. It is fabricated on a 0.5 mm thick, RO3035 substrate. The input impedance, gain, and radiation characteristics of the antenna are also presented. With these properties, it is verified that, with its novel shape, the proposed antenna can be used for various UWB applications.

Novel wideband slot antenna having notch-band function for 2.4 GHz WLAN and UWB applications

2011 ◽  
Vol 3 (4) ◽  
pp. 451-458 ◽  
Author(s):  
Arumugam Chellamuthu Shagar ◽  
Shaik Davood Wahidabanu
Keyword(s):  
Frequency Band ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Area Network ◽  
Rectangular Slot ◽  
Notch Band ◽  
Uwb Applications

In this paper, the design, simulation, and fabrication of a novel printed rectangular slot antenna with a band-notched function suitable for 2.4 GHz wireless local area network (WLAN) and ultra-wideband (UWB) applications is presented and investigated. Two pairs of slits are introduced into the ground plane to realize band-notched function, by tuning the position, length, and width of which a suitable rejected frequency band can be obtained. To improve the impedance matching, a rectangular cut is also made in the ground plane so that the antenna can cover 2–12 GHz frequency range. According to the measured results, the proposed antenna has a large bandwidth totally satisfying the requirement of 2.4 GHz WLAN and UWB systems, while providing the required band-notch function from 5.1 to 5.9 GHz. The study of transfer function and time-domain characteristics also indicates the band-notched function of the antenna. The radiation patterns display nearly omni-directional performance and the antenna gain is stable except in the rejected frequency band (5.1–5.9 GHz). Moreover, group delays are within 1.5 ns except for the notch band. These features make it a promising candidate for UWB wireless applications. Details of this antenna are described, and the experimental results of the constructed prototype are given.

scholarly journals A novel UWB reconfigurable filtering antenna design with triple band-notched characteristics by using u-shaped coppers

2019 ◽  
Vol 14 (1) ◽  
pp. 267
Author(s):  
I.D. Saiful Bahri ◽  
Z. Zakaria ◽  
N. A. Shairi ◽  
N. Edward
Keyword(s):  
Current Distribution ◽  
Antenna Design ◽  
Frequency Range ◽  
Uwb Antenna ◽  
Pin Diodes ◽  
Band Frequency ◽  
Design Changes ◽  
X Band ◽  
Uwb Applications ◽  
Triple Band

<span>This paper proposed an UWB antenna with triple reconfigurable notch filters. By presenting there U-shaped coppers in the design, the potential triple interference in UWB applications can be rejected. Six PIN diodes are putted on the coppers to represent the OFF and ON tunable status in order to add reconfigurable characteristics to the UWB antenna. By using this ON and OFF tunable method, the current distribution of the proposed design changes and enables the antenna to have eight operation modes. The results prove that the proposed design can operate over the entire UWB frequency range (3.1 GHz to 10.6 GHz) and can filter out the target signals from the WLAN upper band (5.725 to 5.825 GHz), WLAN lower band (5.15 to 5.35 GHz) and X band frequency system (7.9 to 8.4 GHz) in one of the tunable configurations.</span>

scholarly journals Ultra Wideband Coplanar Waveguide Antenna with an Improved Gain using a Frequency Selective Surfaces (FSS)

2019 ◽  
Vol 8 (9S) ◽  
pp. 145-149
Keyword(s):  
Time Domain ◽  
Coplanar Waveguide ◽  
Unit Cell ◽  
Ultra Wideband ◽  
Frequency Range ◽  
Rectangular Slot ◽  
Improved Performance ◽  
Set Up ◽  
The Time Domain ◽  
Uwb Applications

In this article, an ultra-wideband FSS reflector has been proposed to enhance the gain of a CPW antenna for UWB applications. A CPW fed antenna having dimensions of 38mm×38mm×1.605mm and FSS unit cell having dimensions 14mm × 14mm × 1.605 mm are presented in the paper. A rectangular slot and stubs are interleaved at the outer edges of the patch for achieving desired characteristics of an ultra-wideband for the frequency range of 3.39 GHz to 12.9 GHz. Simulation results carried out using the CST microwave 2016 version in the time domain are presented for the proposed antenna. An FSS unit cell designed and simulated using periodic boundary conditions and floquet ports is presented. The combined setup of an array of FSS reflector behind the antenna has been simulated in the time domain. This set up shows an improved performance in terms of antenna’s gain. A maximum and minimum gain of 8.14 dB and 4.98 dB has been observed with the presence of FSS reflector behind the coplanar waveguide antenna. A significant improvement of 2.9 dB has been observed over the entire band of antenna’s operation

scholarly journals Compact Integrated Bluetooth UWB Antenna with Quadruple Bandnotched Characteristics

2015 ◽  
Vol 5 (6) ◽  
pp. 1433
Author(s):  
Rekha P Labade ◽  
Shankar B Deosarkar ◽  
Narayan Pisharoty
Keyword(s):  
Time Domain ◽  
Group Delay ◽  
Directional Pattern ◽  
Good Time ◽  
Uwb Antenna ◽  
Half Wavelength ◽  
Quarter Wavelength ◽  
Uwb Applications

In this paper,a compact printed dualband antenna for Bluetooth and UWB applications with WiMax(3.3-3.7 GHz), C-band satellite downlink(3.7-4.2GHz), WLAN(5.15-5.825GHz) and DSRC(5.5-5.925GHz) bandnotched characteristics is proposed and investigated. By etching two half-wavelength L-shaped slots in the radiating patch and an inverted U-shaped slot in the microstrip feedline quadruple bandnotched characteristics is obtained. Further, by embedding quarter wavelength parasitic strip at two edges of U-shaped radiating patch dualband characteristics with desired bandwidth is obtained. the proposed antenna is designed and fabricated on a FR4 substrate of dimensions 24mm X 35mm that operates over a 2.4-11GHz with S11&lt;-10dB except over notch bands of 3.3-3.7GHz, 3.7-4.2GHz,5.15-5.625GHz and 5.625-6GHz. Directional pattern in E-plane and nearly omnidirectional pattern in H-plane are observed over a UWB band except at desired bandnotched freqencies. Less variation in group delay and pulse deformation shows good time domain characteristics. In addition, the structure exhibits stable gain over the desired band.

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