Ultra-Wideband Slot Antenna on Flexible Substrate for WLAN/WiMAX/UWB Applications

2014 ◽  
pp. 116-126 ◽  
Author(s):  
Tuanjai Archevapanich ◽  
Mayuree Lertwatechakul ◽  
Paitoon Rakluea ◽  
Noppin Anantrasirichai ◽  
Vanvisa Chutchavong
Keyword(s):  
Flexible Substrate ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
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.

Compact stepped slot antenna for ultra-wideband applications

2021 ◽  
pp. 1-7
Author(s):  
B. Hammache ◽  
A. Messai ◽  
I. Messaoudene ◽  
T. A. Denidni
Keyword(s):  
Radiation Pattern ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Back Side ◽  
Compact Size ◽  
Measurement Results ◽  
Operating Bandwidth ◽  
Uwb Applications

Abstract In this paper, a compact stepped slot antenna for ultra-wideband (UWB) applications is proposed. A very small size and UWB bandwidth operation are achieved by integrating a stepped slot in the back side of the antenna. This stepped slot is excited by using a 50 Ω-feed line in the top side of the antenna. The antenna is characterized by an impedance bandwidth between 3.05 GHz and more than 12 GHz. The dimensions of the antenna are 17 mm × 8 mm × 1.27 mm, which leads to the most compact size compared with other works in the literature. The integrated stepped slot is divided into additional elementary slots, where each elementary slot has a matching point. Adding these elementary slots allows to increase further the operating bandwidth. The radiation pattern of the compact stepped slot antenna is omnidirectional in the H-plane and bidirectional in the E-plane. The measurement results agree well with the simulated ones in terms of impedance matching and radiation pattern.

Design of Ultra-Wideband Tapered Slot Antenna by Using Binomial Transformer with Corrugation

Frequenz ◽  
2017 ◽  
Vol 71 (5-6) ◽  
Author(s):  
Yosita Chareonsiri ◽  
Wanwisa Thaiwirot ◽  
Prayoot Akkaraekthalin
Keyword(s):  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Antenna Gain ◽  
Radiation Characteristics ◽  
Step Procedure ◽  
Flat Gain ◽  
Uwb Applications ◽  
Good Agreement

AbstractIn this paper, the tapered slot antenna (TSA) with corrugation is proposed for UWB applications. The multi-section binomial transformer is used to design taper profile of the proposed TSA that does not involve using time consuming optimization. A step-by-step procedure for synthesis of the step impedance values related with step slot widths of taper profile is presented. The smooth taper can be achieved by fitting the smoothing curve to the entire step slot. The design of TSA based on this method yields results with a quite flat gain and wide impedance bandwidth covering UWB spectrum from 3.1 GHz to 10.6 GHz. To further improve the radiation characteristics, the corrugation is added on the both edges of the proposed TSA. The effects of different corrugation shapes on the improvement of antenna gain and front-to-back ratio (F-to-B ratio) are investigated. To demonstrate the validity of the design, the prototypes of TSA without and with corrugation are fabricated and measured. The results show good agreement between simulation and measurement.

Design of reconfigurable filtering ultra-wideband antenna with switchable band-notched functions

2018 ◽  
Vol 11 (4) ◽  
pp. 368-375 ◽  
Author(s):  
Hailong Yang ◽  
Xiaoli Xi ◽  
Lili Wang ◽  
Yuchen Zhao ◽  
Xiaomin Shi ◽  
...  
Keyword(s):  
Basic Structure ◽  
Negative Influence ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Uwb Antenna ◽  
Pin Diodes ◽  
Microstrip Lines ◽  
Final Design ◽  
Filtering Function ◽  
Uwb Applications

AbstractA compact reconfigurable filtering ultra-wideband (UWB) antenna with switchable band-notched functions is proposed. The basic structure of the proposed design is a filtering slot antenna with good band-edge selectivity using stepped impedance resonator feeding line. The reconfigurability is achieved by using two microstrip lines paralleling to the feeding line and two PIN diodes. The reconfigurable structure and bias circuit of the antenna are relatively simple and are not connected to the radiation structure, so they have little negative influence on the radiation characteristics of the antenna. Total four states could be achieved by using two PIN diodes to short the microstrip lines and ground. To verify the performance of the final design, multiple measured and simulated results in frequency and time domain are studied and analyzed. The measured results agreed very well with simulation. Compared with the traditional UWB antenna, the proposed antenna has advantages in size, filtering function in-band and out-of-band, and tunable states for multiple UWB applications.

scholarly journals Parametric Study of Ultra-Wideband Dual Elliptically Tapered Antipodal Slot Antenna

2008 ◽  
Vol 2008 ◽  
pp. 1-9 ◽  
Author(s):  
Xianming Qing ◽  
Zhi Ning Chen ◽  
Michael Yan Wah Chia
Keyword(s):  
Parametric Study ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Frequency Range ◽  
Radiation Characteristics ◽  
Design And Optimization ◽  
Antenna Performance ◽  
Uwb Applications

Parametric study of the impedance and radiation characteristics of a dual elliptically tapered antipodal slot antenna (DETASA) is undertaken in this paper. Usually, the performance of the DETASA is sensitive to the parameters, the effects of major geometry parameters of the radiators and feeding transition of the DETASA on antenna performance are investigated across the frequency range of 1–18 GHz. The information derived from this study provides guidelines for the design and optimization of the DETASAs which are widely used for UWB applications.

Reconfigurable microstrip slot antenna with DGS for UWB applications

2017 ◽  
Vol 9 (7) ◽  
pp. 1517-1522 ◽  
Author(s):  
Mehri Borhani Kakhki ◽  
Pejman Rezaei
Keyword(s):  
Simple Structure ◽  
Ground Plane ◽  
Local Area ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Antenna Structure ◽  
Rectangular Slot ◽  
Uwb Applications

In this paper, a frequency reconfigurable microstrip slot antenna for ultra-wideband applications with switchable band-notch functions is designed and manufactured. To generate a wide usable fractional bandwidth of 3 to over 13.6 GHz, square patch transforms to a fork-shaped patch, also two triangular-shaped strips have been added at above sections of rectangular slot on the ground plane. Band rejections are obtained by adding two inverted L-shaped strips in the fork-shaped patch and one L-shaped defected ground structure. Moreover, by implementation of two PIN diodes within the antenna structure, four switchable frequency responses are achieved. The designed antenna has simple structure and a small size of 20 × 20 × 0.8 mm3 while providing band rejection characteristics at WiMAX (Worldwide Interoperability for Microwave Access) and WLAN (Wireless Local Area Networks) systems.

Fractal-Inspired Ultra-Wideband Diversity Slot Antenna for Wireless Communication Systems

2019 ◽  
pp. 103-130
Author(s):  
Anirban Karmakar ◽  
Anuradha Saha
Keyword(s):  
Communication Systems ◽  
Multiple Input Multiple Output ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Wireless Communication Systems ◽  
Impedance Bandwidth ◽  
Input Multiple Output ◽  
Orthogonal Orientation ◽  
Uwb Applications ◽  
Minkowski Fractal

A novel compact ultra-wideband (UWB) multiple-input multiple-output (MIMO) slot antenna with band notch characteristics is presented for portable wireless UWB applications. The antenna comprises of co-planar waveguide feed (CPW) and two radiating monopoles oriented in orthogonal orientation for providing orthogonal radiation patterns. A Minkowski fractal parasitic stub along with a Minkowski fractal grounded stub has been placed at 45° between the monopoles to reduce the coupling between them, which in turn establishes high isolation between the radiators. An excellent band notch characteristic is obtained at 5.5 GHz by etching a modified E-shaped compact slot on the radiators. Results show that the designed antenna meets -10 dB impedance bandwidth and -17 dB isolation throughout the entire operating band (3.1 -12 GHz). Novelty of this design lies in improving isolation using fractal which occupies less space in compared to other isolation mechanisms in MIMO structures. The simulated and measured results depict that the proposed antenna is convenient for MIMO diversity systems.

Design of asymmetrically slotted hexagonal patch antenna for high-gain UWB applications

2014 ◽  
Vol 7 (5) ◽  
pp. 571-577
Author(s):  
Raghupatruni Venkat Siva Ram Krishna ◽  
Raj Kumar ◽  
Nagendra Kushwaha
Keyword(s):  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Frequency Selective Surface ◽  
High Gain ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Capacitive Reactance ◽  
Uwb Applications

A compact slot antenna for high-gain ultra wideband applications is presented. The slot is asymmetrically cut in the ground plane and is a combination of two rectangles. A hexagonal patch with two stepped coplanar waveguide-feed is used to excite the slot. The capacitive reactance of the hexagonal patch is neutralized by the inductive reactance created by the asymmetric slot and results into wider impedance matching. The measured impedance bandwidth of the proposed antenna is 11.85 GHz (2.9–14.75 GHz). The radiation patterns of the proposed antenna are found to be omni-directional in the H-plane and bi-directional in the E-plane. To enhance the gain of the antenna, a compact three-layer frequency selective surface (FSS) is used as a reflector. The overall thickness of the FSS is 3.5 mm. There is 4–5 dBi improvement in antenna gain after application of the FSS. The measured and simulated results are in good agreement.

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