scholarly journals Modeling and Simulation of Dual-band Yagi Antennas for Voice Communication on Microsatellite

2019 ◽  
Vol 11 (3) ◽  
pp. 68-72
Author(s):  
Muhammad Darsono ◽  
Ahmad Ruri Wijaya ◽  
Rommy Hartono
Keyword(s):  
Beam Width ◽  
Dipole Antenna ◽  
Antenna Design ◽  
Dual Band ◽  
Antenna Element ◽  
Method Of Moment ◽  
Voice Communication ◽  
Software Application ◽  
Copper Pipe ◽  
Yagi Antenna

The design of the dual-band Yagi antenna was developed to support voice communication through voice repeaters on microsatellites in the UHF-VHV frequency from ground stations. The Yagi antenna is a type of half lambda dipole antenna that makes it easy to obtain direction and increase gain. The antenna is designed using the method of moment through a simulation with the CST microwave studio software application. The design used as an antenna element material is a type of copper pipe cylinder. The results of the Yagi antenna design in the VHF frequency consist of one driven element, one reflector element, and three director elements, while the UHF frequency consists of one reflector element and seven directors. The results of simulation parameters are obtained, such as Bandwidth of return loss below 10 dB is 4.3 MHz(VHF), and 44 MHz (UHF), VSWR (2:1) is 1.24 (VHF) and 1.36 (UHF), Gain is 9.19 dBi (VHF) and 10.5 dBi (UHF) and Beam Width is 64 degree (VHF) and 58 degree (UHF). The suitability of the antenna design target is dual-band, and Gain value in UHF is higher than VHF.

scholarly journals A Hybrid of T-Dipole and Quasi-Yagi Antenna for Dual-band WLAN Access Point

2012 ◽  
Vol 2 (1-2) ◽  
Author(s):  
Son Xuat Ta ◽  
Ikmo Park ◽  
Chien Dao-Ngoc
Keyword(s):  
Microstrip Line ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Access Point ◽  
Local Area ◽  
Antenna Design ◽  
Dual Band ◽  
Area Network ◽  
Yagi Antenna ◽  
Peak Gain

In this paper, a hybrid of T-dipole and quasi-Yagi antenna is presented for using in dual-band Wireless Local Area Network (WLAN) access point. The antenna is made up of combination of T-dipole and quasi-Yagi antenna structures, which are distinctly designed to operate at 2.4 and 5.5 GHz frequency bands. A simply integrated balun that consists of a curved microstrip line and a circular slot to allow broadband characteristic is used to feed the antenna. The final antenna design presents measured bandwidths (RL ≤ − 10 dB) of 2.35 – 2.55 GHz and 4.30 – 6.56 GHz which cover completely the two bands of WLAN. Simulated and measured results of peak gain and radiation patterns in both E- and H-plane validate potential of the design.

scholarly journals Coplanar Stripline-Fed Wideband Yagi Dipole Antenna with Filtering-Radiating Performance

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1258
Author(s):  
Yong Chen ◽  
Gege Lu ◽  
Shiyan Wang ◽  
Jianpeng Wang
Keyword(s):  
High Frequency ◽  
Dipole Antenna ◽  
Frequency Selectivity ◽  
Antenna Design ◽  
Initial Structure ◽  
Coplanar Stripline ◽  
Half Wavelength ◽  
Yagi Antenna ◽  
Operating Bandwidth ◽  
Good Agreement

In this article, a wideband filtering-radiating Yagi dipole antenna with the coplanar stripline (CPS) excitation form is investigated, designed, and fabricated. By introducing an open-circuited half-wavelength resonator between the CPS structure and dipole, the gain selectivity has been improved and the operating bandwidth is simultaneously enhanced. Then, the intrinsic filtering-radiating performance of Yagi antenna is studied. By implementing a reflector on initial structure, it is observed that two radiation nulls appear at both lower and upper gain passband edges, respectively. Moreover, in order to improve the selectivity in the upper stopband, a pair of U-shaped resonators are employed and coupled to CPS directly. As such, the antenna design is finally completed with expected characteristics. To verify the feasibility of the proposed scheme, a filtering Yagi antenna prototype with a wide bandwidth covering from 3.64 GHz to 4.38 GHz is designed, fabricated, and measured. Both simulated and measured results are found to be in good agreement, thus demonstrating that the presented antenna has the performances of high frequency selectivity and stable in-band gain.

scholarly journals Dual Band and Dual Diversity Four-Element MIMO Dipole for 5G Handsets

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 767
Author(s):  
Muhammad Ali Jamshed ◽  
Masood Ur-Rehman ◽  
Jaroslav Frnda ◽  
Ayman A. Althuwayb ◽  
Ali Nauman ◽  
...  
Keyword(s):  
Multiple Input Multiple Output ◽  
Human Head ◽  
Dipole Antenna ◽  
Base Station ◽  
Dual Band ◽  
Head Model ◽  
Antenna Element ◽  
Total Efficiency ◽  
Large Space ◽  
Mobile Handset

The increasing popularity of using wireless devices to handle routine tasks has increased the demand for incorporating multiple-input-multiple-output (MIMO) technology to utilize limited bandwidth efficiently. The presence of comparatively large space at the base station (BS) makes it straightforward to exploit the MIMO technology’s useful properties. From a mobile handset point of view, and limited space at the mobile handset, complex procedures are required to increase the number of active antenna elements. In this paper, to address such type of issues, a four-element MIMO dual band, dual diversity, dipole antenna has been proposed for 5G-enabled handsets. The proposed antenna design relies on space diversity as well as pattern diversity to provide an acceptable MIMO performance. The proposed dipole antenna simultaneously operates at 3.6 and 4.7 sub-6 GHz bands. The usefulness of the proposed 4×4 MIMO dipole antenna has been verified by comparing the simulated and measured results using a fabricated version of the proposed antenna. A specific absorption rate (SAR) analysis has been carried out using CST Voxel (a heterogeneous biological human head) model, which shows maximum SAR value for 10 g of head tissue is well below the permitted value of 2.0 W/kg. The total efficiency of each antenna element in this structure is −2.88, −3.12, −1.92 and −2.45 dB at 3.6 GHz, while at 4.7 GHz are −1.61, −2.19, −1.72 and −1.18 dB respectively. The isolation, envelope correlation coefficient (ECC) between the adjacent ports and the loss in capacity is below the standard margin, making the structure appropriate for MIMO applications. The effect of handgrip and the housing box on the total antenna efficiency is analyzed, and only 5% variation is observed, which results from careful placement of antenna elements.

scholarly journals Yagi Antenna Design and Analysis 11 Folded Dipole Feeding Elements for VoIP Networks

2015 ◽  
Vol 1 (1) ◽  
pp. 19-25
Author(s):  
Fandy Himawan
Keyword(s):  
Dipole Antenna ◽  
Antenna Design ◽  
Long Distance ◽  
Directional Radiation ◽  
Wireless Router ◽  
Yagi Antenna ◽  
Matching Technique ◽  
Folded Dipole ◽  
Better Than

The problem that often occurs in VOIP networks using wireless media is the weak signal received and transmitted by the transceiver device at a long distance from the wireless router, so that the quality of VOIP service is often disconnected. The purpose of this research is to design and realize an 11 element yagi antenna with folded feed elements. dipole as an antenna for a transceiver device whose gain is better than a built-in antenna, so that it can support VOIP services. Yagi antenna is an antenna consisting of 3 elements, namely a reflector element, a driven element and a director element. The reflector element and the director element cause the yagi antenna to be directional so that a large gain is obtained from a certain point, while the driven one is used is a folded dipole antenna which has an impedance of 300 ohms so that the matching technique to the 50 ohm transmission line becomes easier. Ghz is less than 1.5 and RL is less than -14 dB. The bandwidth obtained is 620 MHz, the gain is 16.08 dBi with directional radiation and linear polarization. In implementation, the VOIP service is stable at a distance of 50 m using a yagi antenna, compared to the less stable built-in antenna.

scholarly journals Performance Investigations of Quasi-Yagi Loop and Dipole Antennas on Silicon Substrate for 94 GHz Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Osama M. Haraz ◽  
Mohamed Abdel-Rahman ◽  
Najeeb Al-Khalli ◽  
Saleh Alshebeili ◽  
Abdel Razik Sebak
Keyword(s):  
Silicon Substrate ◽  
Coplanar Waveguide ◽  
High Gain ◽  
Dipole Antenna ◽  
Antenna Element ◽  
Dipole Antennas ◽  
Printed Antennas ◽  
W Band ◽  
Yagi Antenna ◽  
Feeding Structure

This paper introduces the design and implementation of two high gain Quasi-Yagi printed antennas developed on silicon substrate for 94 GHz imaging applications. The proposed antennas are based on either driven loop or dipole antennas fed by a coplanar waveguide (CPW) feeding structure. For better matching with the driven antennas, a matching section has been added between the CPW feedline and the driven antenna element. To improve the gain of either loop or dipole antennas, a ground reflector and parasitic director elements have been added. Two Quasi-Yagi antenna prototypes based on loop and dipole antenna elements have been fabricated and experimentally tested using W-band probing station (75–110 GHz). The measured results show good agreement with simulated results and confirm that the proposed antennas are working. In addition, a feed and matching configuration is proposed to enable coupling a microbolometer element to the proposed Quasi-Yagi antenna designs for performing radiation pattern measurements.

scholarly journals CPW-FED STUB-LOADED SLOT DIPOLE ANTENNA DESIGN FOR DUAL-BAND OPERATION

2016 ◽  
Vol 60 ◽  
pp. 67-72 ◽  
Author(s):  
Jianxing Li ◽  
Jianying Guo ◽  
Hongyu Shi ◽  
Bin He ◽  
Anxue Zhang
Keyword(s):  
Dipole Antenna ◽  
Antenna Design ◽  
Dual Band

scholarly journals Performance Improvement of a Direction Finding System Antenna Using Method of Moment (MOM)

2020 ◽  
Vol 5 (1) ◽  
pp. 27-32
Author(s):  
Ogonna F. Anaebo ◽  
Gloria N. Ezeh ◽  
Onyebuchi Chikezie Nosiri ◽  
Cosmas K. Agubor
Keyword(s):  
Performance Improvement ◽  
Vector Potential ◽  
Software Tool ◽  
Direction Finding ◽  
Dipole Antenna ◽  
False Alarms ◽  
Magnetic Vector Potential ◽  
Method Of Moment ◽  
Magnetic Vector ◽  
Yagi Antenna

This paper focuses on the Performance Improvement of a Direction Finding System Antenna Using Method of Moment (MoM) Approach. The work is developed to provide an approximate current distribution for a direction finding system antenna by employing the use of Method of Moment on an array of Yagi-uda antenna. The parameters of the experimental antenna are derived and analyzed via Magnetic Vector Potential (MVP) operator. The accurate current flowing through the radiating elements of the direction finding system is analyzed using combination of Method of Moment technique and Magnetic Vector Potential (MVP) operator. This helps to avoid the detection of false alarms and inability of the system to detect remote targets. A typical direction finding system Yagi antenna is designed and operated at a frequency range of 0.6- 0.8 GHz. The antenna has a single reflector, an active (driven) element and three (3) parasitic directors. The antenna parameters are simulated using MatLab R2010a software tool. The average pointing vector of the designed Yagi antenna was obtained as 3.73watt per square metre, and Radiation Intensity value of about 9.400 coulomb per kilogram. The simulation results indicate an appreciable increase in directivity of 9.03dBi, an enhanced directive gain compared to that of the equivalent dipole antenna of 1.76dBi, signifying 7.27dBi enhancement.

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