scholarly journals Coplanar wave guide fed fork shaped frequency reconfigurable antenna for LTE, WI-FI and WLAN applications

2017 ◽  
Vol 7 (1.1) ◽  
pp. 366
Author(s):  
B Siva Prasad ◽  
P Mallikarjuna Rao ◽  
B T P Madhav
Keyword(s):  
Impedance Matching ◽  
Ground Plane ◽  
Basic Structure ◽  
Wave Guide ◽  
Reconfigurable Antenna ◽  
Pin Diodes ◽  
Feed Line ◽  
Measurement Results ◽  
Simulation Results ◽  
Antenna Model

A coplanar wave guide fed fork shaped antenna is designed with reconfigurability for switching between the application bands of LTE, Wi-Fi and WLAN. A novel closed hut shaped ground plane structure is used in the construction of the antenna model for good impedance matching with the feed line. The basic structure of the antenna model is working in the UWB range from 3.1 to 10.6 GHz. The adjacent strips of the monopole consisting of the slots for the placement of PIN diodes. The switching operation of the diodes providing frequency reconfigurability nature in the antenna between LTE (2.1-2.2 GHz), Wi-Fi (2.4 to 2.7 GHz) and WLAN (5.6-5.8 GHz) bands. Antenna is providing peak realized gain of 4.5 dB and efficiency more than 70% in the operating bands. The prototyped antenna is providing excellent measurement results in correlation with simulation results obtained from CST Microwave Studio.

scholarly journals Frequency reconfigurable monopole antenna with DGS for ISM band applications

2018 ◽  
Vol 69 (4) ◽  
pp. 293-299 ◽  
Author(s):  
Boddapati T. P. Madhav ◽  
Shaik Rajiya ◽  
Badugu P. Nadh ◽  
Munuswami S. Kumar
Keyword(s):  
Dielectric Constant ◽  
Wireless Communication ◽  
Transmission Line ◽  
Ground Plane ◽  
Reconfigurable Antenna ◽  
Pin Diodes ◽  
Microstrip Transmission Line ◽  
Ism Band ◽  
Frequency Reconfigurable Antenna ◽  
Antenna Model

Abstract In this article a compact frequency reconfigurable antenna is presented for wireless communication applications of industrial, scientific and medical band (ISM). The proposed antenna model is designed with the dimensions of 58mm×48 mm on FR4 epoxy of dielectric constant 4.4 with the thickness of 0.8 mm. The proposed antenna consists of defected T-shape ground plane, which acts as a reflector. In the design of frequency reconfigurable antenna, BAR 64-02V PIN diodes are used as switching elements and antenna is fed by microstrip transmission line. The proposed antenna can switch at different frequencies (2.5 GHz, 2.3 GHz and 2.2 GHz) depending on the biasing voltage applied to the PIN diodes. The current antenna showing VSWR < 2 in the operating band and providing peak realized gain of 3.2 dBi. A good matching obtained between expected and the measured results.

scholarly journals A frequency reconfigurable antenna with Bluetooth, Wi-Fi and WLAN notch band characteristics

2018 ◽  
Vol 7 (2.7) ◽  
pp. 127 ◽  
Author(s):  
A Vamseekrishna ◽  
B T P Madhav
Keyword(s):  
Dielectric Constant ◽  
Loss Tangent ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Substrate Material ◽  
Reconfigurable Antenna ◽  
Pin Diodes ◽  
Notch Band ◽  
Frequency Reconfigurable Antenna

A compact coplanar waveguide fed reconfigurable antenna with three notch bands are presented in this paper. Proposed antenna reconfigurability is acquired by placing bar6404 PIN diodes in the S-shaped ground plane in right to left mode and left to right mode. By switching the diode, reconfigurability achieved for three different operations. The substrate material for the proposed antenna is FR4 with dielectric constant 4.4 and loss tangent 0.02. The overall dimension of the reconfigurable antenna is around 30×26mm2. It is being observed in this work for the cause of each individual slot on notch band characteristics. The measured gain for the designed reconfigurable antenna is quite stable at operating frequencies except notch bands. The proposed antenna is suitable for practical wideband applications with notching.

New-Type Energy-Recovering Hydraulic Workover Rig and the Simulation for Lifting the Tubing String

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Zhang Lujun ◽  
Xie Hengshu
Keyword(s):  
Potential Energy ◽  
Simulation Analysis ◽  
Basic Structure ◽  
Dynamics Model ◽  
Actual Measurement ◽  
Model And Simulation ◽  
Measurement Results ◽  
Tubing String ◽  
New Type ◽  
Simulation Results

A new-type energy-recovering hydraulic workover rig is researched. The basic structure and working theory of this rig are introduced. This rig decreases its equipped power remarkably compared with the conventional rig, and can recover the potential energy released by the tubing string when lowered. With infinite force-grade number, this rig can obtain the maximum lifting efficiency and energy-recovering rate. The dynamics model of lifting the tubing string is deduced and a simulation analysis is conducted. Through simulation some conclusions are obtained: (1) the greater the throttle valve path area the higher the tubing string lifting velocity, (2) the lighter the tubing string the higher the tubing string lifting velocity, and (3) the greater the displacement of the variable pump motor the higher the tubing string lifting velocity. The actual measurement results prove that the dynamics model and simulation results are basically right.

Dual-band linearly and circularly polarized microstrip patch antennas with meandering slot and metallic vias

2015 ◽  
Vol 9 (2) ◽  
pp. 341-348 ◽  
Author(s):  
Jin Zhang ◽  
Xianqi Lin ◽  
Jiawei Yu ◽  
Liying Nie
Keyword(s):  
Linear Polarization ◽  
Impedance Matching ◽  
Single Band ◽  
Dual Band ◽  
Patch Antennas ◽  
Circularly Polarized ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Measurement Results ◽  
Simulation Results

Patch antennas with a meandering slot and different distributions of grounded metallic vias are presented in this paper. The meandering slot is adopted to stimulate dual-band operation, while the number and position of the grounded metallic vias are suggested to achieve different radiation performances. The characteristics are analyzed in detail where we find that the existence of the vias also improves the impedance matching. Four samples are designed, where dual-band with both linear polarization, dual-band with circular- and linear-polarization, and single band with linear polarization are obtained, respectively. The samples are finally fabricated and the measurement results agree well with the simulation results.

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 A Wideband Circular Polarized Antenna using Coplanar Waveguide

2019 ◽  
Vol 8 (6S4) ◽  
pp. 587-589
Keyword(s):  
Circular Polarization ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Rectangular Slot ◽  
Feed Line ◽  
Polarization Characteristics ◽  
Orthogonal Phase

A wideband coplanar waveguide (CPW) antenna with circular polarization characteristics using modified ground slot is studied in this work. Proposed design incorporates a hexagonal slot instead of rectangular slot, accounting for enhanced impedance matching. This ground slot is energized by a 50Ω feed line, resulting in excitation of two orthogonal phase quadrature modes (even-odd modes). Thus, fulfilling the essential criteria required for realizing circular polarization. A narrow horizontal slit (lg) is embedded in the ground plane at immediate left of feed line, accounting for wideband characteristics. 10dB impedance bandwidth of proposed antenna extends from 2.65- 5.60 GHz, while 3dB axial ratio bandwidth extends from 3.90- 5.80 GHz. Hence, overlapping bandwidth of proposed antenna extends from 3.90 - 5.60 GHz. RHCP characteristics with monopole radiation pattern makes proposed antenna useful for WLAN, radio navigation and radiolocation applications.

scholarly journals DESIGN AND ANALYSIS OF T-STUB U-SLOT NOTCH BAND FREQUENCY RECONFIGURABLE ANTENNA USING PARAMETRIC ANALYSIS FOR WIRELESS COMMUNICATION APPLICATIONS

2020 ◽  
Vol 7 (7) ◽  
pp. 15-20
Author(s):  
B.Siva Prasad ◽  
P. Mallikarjuna Rao
Keyword(s):  
Parametric Analysis ◽  
Coplanar Waveguide ◽  
Antenna Design ◽  
Reconfigurable Antenna ◽  
Pin Diodes ◽  
Band Frequency ◽  
Notch Band ◽  
Feed Network ◽  
Simulation Results ◽  
Efficient Power

The design and analysis of a T-Stub U-Slot Frequency Reconfigurable Notch band antenna is considered in the present work using Coplanar Waveguide feed network for an efficient power transfer to improve the bandwidth characteristics of the antenna. The designed antenna has a dimension of 24X21X1.6 mm with FR4 substrate having a permittivity of 4.4. The proposed antenna consists of a T-Stub and U-Slots which are used to enhance the performance characteristics of the antenna. The reconfigurability is achieved by placing PIN diodes at T-Stub and U-Slots of the antenna design. The designed antenna is more suitable for WLAN, Wi-Fi, LTE and Bluetooth applications. Simulation results are obtained using CST tool and the same are presented at the end.

scholarly journals Frequency Reconfigurable Antenna using PIN Diodes

2019 ◽  
Vol 9 (1S5) ◽  
pp. 66-70
Keyword(s):  
Antenna System ◽  
Reconfigurable Antenna ◽  
Multiple Frequency ◽  
Pin Diodes ◽  
Wireless Applications ◽  
System A ◽  
Ansoft Hfss ◽  
System Requirements ◽  
Simulation Results ◽  
Frequency Reconfigurable Antenna

With the increase in wireless applications, there is a need for compact antennas that adapt their behavior with changing system requirements or environmental conditions. Here adapt implies the antenna should be able to alter operating frequencies, impedance bandwidths, polarizations, radiation patterns. These all features are provided by the “Reconfigurable antenna”. The important feature of reconfigurable antenna is that, they provide the same throughput as a multi-antenna system. A compact frequency reconfigurable antenna is designed with the aid of Ansoft HFSS that provides multiple frequency bands. This is achieved by using electrical switches such as PIN diodes. Depending on state of switches different operating frequencies are obtained. The switches placed on the antenna elements are powered wirelessly by the antenna itself. The design, geometries and simulation results of a frequency reconfigurable antenna are presented in this report. Further advancements are to be done for this structure to achieve polarization and radiation pattern re-configurability.

scholarly journals Impedance Matching of Axial Mode Helical Antennas

2021 ◽  
Vol 20 ◽  
pp. 66-69
Author(s):  
Hossein Mardani ◽  
Neil Buchanan ◽  
Robert Cahill ◽  
Vincent Fusco
Keyword(s):  
Input Impedance ◽  
Impedance Matching ◽  
Ground Plane ◽  
Center Frequency ◽  
Design Parameters ◽  
Axial Mode ◽  
Impedance Characteristics ◽  
Measurement Results ◽  
Line Theory ◽  
Helical Antennas

In this paper, we study the input impedance characteristics of axial mode helical antennas to find an effective way for matching it to 50 Ω. The study is done on the important matching parameters such as like wire diameter and helix to the ground plane gap. It is intended that these parameters control the matching without detrimentally affecting the radiation pattern. Using transmission line theory, a simple broadband technique is proposed, which is applicable for perfect matching of antennas with similar design parameters. We provide design curves to help to choose the proper dimensions of the matching section based on the antenna’s unmatched input impedance. Finally, using the proposed technique, a 4-turn axial mode helix is designed at 2.5 GHz center frequency and the measurement results of the manufactured antenna will be included. This parametric study gives a good insight into the input impedance characteristics of axial mode helical antennas and the proposed impedance matching approach provides a simple, useful method for matching these types of antennas.

scholarly journals Wideband Crescent-Shaped Slotted Printed Antenna with Radiant Circular Polarisation

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Akrem Asmeida ◽  
Zuhairiah Zainal Abidin ◽  
Shaharil Mohd Shah ◽  
Muhammad Ramlee Kamarudin ◽  
Norun Abdul Malek ◽  
...  
Keyword(s):  
Communication Systems ◽  
High Efficiency ◽  
Impedance Matching ◽  
Ground Plane ◽  
Axial Ratio ◽  
Basic Structure ◽  
Impedance Bandwidth ◽  
Defected Ground Structure ◽  
Circular Polarisation ◽  
Rectangular Slot

Producing a suitable impedance matching between the radiating element and the feedline is the prior hurdle to overcome for a wideband antenna with circular polarisation designs. This study presents a novel antenna consisting of a defected ground structure (DGS) and a crescent-slot radiating patch for broad impedance bandwidth. In addition, a narrow rectangular slot was etched on the ground plane for antenna compactness and outcomes improvement. In order to examine the reliability, two different numerical softwares were compared based on the antenna’s basic structure. Apart from this, an equivalent circuit of the proposed prototype is modelled logically using ADS 2016. The numerical results demonstrate that the impedance bandwidth was about 74.6% for < −10 dB, while the 3 dB axial ratio bandwidth greater than 53% was achieved. In the operational bandwidth of the design, good impedance matching and high efficiency were seen, which shows that this design is appropriate for modern wireless communication systems in ISM and GSM bands.

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