scholarly journals Rancang Bangun Antena Mikrostrip Patch Serangga untuk Aplikasi Monitoring Komposter pada Frekuensi 2,4 GHz

Spektral ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 6-9
Author(s):  
Muhammad Faris ◽  
Shita Fitria Nurjihan
Keyword(s):  
Standing Wave ◽  
Return Loss ◽  
Voltage Standing Wave Ratio

Komposter merupakan alat untuk menampung kompos. Kompos sangat dibutuhkan oleh masyarakat khususnya yang gemar bercocok tanam. Dengan adanya alat monitoring komposter ini memudahkan masyarakat untuk mengecek suhu dan kelembapan dari kompos. Data suhu dan kelembapan dari kompos dikirimkan dari bagian pengirim ke bagian penerima menggunakan sebuah antena mikrostrip dengan bentuk patch serangga. Antena mikrostrip patch serangga bekerja pada frekuensi 2,4 GHz. Antena mikrostrip patch serangga merupakan pengembangan dari patch rectangular, sehingga dalam perhitungannya menggunakan rumus dasar antena patch rectangular. Perancangan dan simulasi antena dilakukan menggunakan software CST Studio Suite 2018. Simulasi dilakukan dengan melakuakn percobaan mengubah dimensi antena sehingga didapatkan hasil parameter yang terbaik. Parameter antena yang diukur adalah Voltage Standing Wave Ratio (VSWR), return loss, gain, dan pola radiasi. Hasil pengukuran parameter antena yang diperoleh yaitu VSWR sebesar 1,0772, return loss sebesar -28,5954 dB, gain sebesar 4,249 dB, dan pola radiasi bidirectional.

scholarly journals Bi-Ellipse Microstripline Antenna Array Varians

2021 ◽  
Author(s):  
Putu Artawan
Keyword(s):  
Reflection Coefficient ◽  
Antenna Array ◽  
Standing Wave ◽  
Microstrip Antenna ◽  
Communication Systems ◽  
Return Loss ◽  
Voltage Standing Wave Ratio ◽  
Frequency Range ◽  
X Band ◽  
Working Frequency

The objectives of this research include obtaining and verifying the impedance formula of the designed bi-ellipse microstrip antenna and correlating the results obtained through simulation and experimentation. The research also aims to obtain the structure and dimensions that provide optimal characteristics of the designed bi-ellipse microstrip antenna and produce a prototype at S, C and X-Band frequencies. This research produced the structure and dimensions of a bi-ellipse microstrip antenna that provide optimal characteristics of antenna. The characteristics results of the antenna parameters in this research include a 8x2 array, with a bandwidth value of around 100.0 MHz obtained at a working frequency of 7.09GHz (7.04 GHz - 7.14 GHz), with a reflection coefficient value of 0.02, Voltage Standing Wave Ratio (VSWR) of 1.06, return loss of −30.00 dB and a gain of 7.30 dB. For the 8x4 array, a bandwidth value of approximately 210.0 MHz is obtained at a working frequency range of 2.85GHz, which ranges from 2.74GHz - 2.95GHz, with a reflection coefficient value of 0.04, Voltage Standing Wave Ratio (VSWR) of 1.09, return loss of −27.06 dB and a gain of 8.19 dB. The results presented above fulfill the indicators of good antenna characteristics parameters applicable to radar communication systems.

scholarly journals Study of a New Design of the Planar Inverted-F Antenna for Mobile Phone Handset Applications

2020 ◽  
Vol 10 (1) ◽  
pp. 5270-5275
Author(s):  
S. Ghnimi ◽  
A. Nasri ◽  
A. Gharsallah
Keyword(s):  
Mobile Phone ◽  
Radiation Pattern ◽  
Standing Wave ◽  
Return Loss ◽  
Voltage Standing Wave Ratio ◽  
Dual Band ◽  
New Techniques ◽  
Current Distributions ◽  
Good Agreement ◽  
Pifa Antenna

This paper suggests a new design of the PIFA antenna for mobile phone handset applications. In this context, we are interested in the development of new techniques based on the creation of slot matching for the improvement and miniaturization of a dual-band PIFA antenna operating at 900MHz and 1800MHz. Analysis of antenna parameters such as return loss (S11), radiation pattern, Voltage Standing Wave Ratio (VSWR), current distributions, gain, and the relation between them are performed in CST software. There is a good agreement between the results of simulation by CST and HFSS and those of measurement for the proposed antenna.

scholarly journals Design and Simulation of Horizontally placed H-shaped Fractal Antenna

2019 ◽  
Vol 9 (1) ◽  
pp. 1272-1276
Keyword(s):  
Standing Wave ◽  
Return Loss ◽  
Fractal Structure ◽  
Simulation Software ◽  
Voltage Standing Wave Ratio ◽  
Fractal Antenna ◽  
Feeding Method ◽  
The Third ◽  
Multiple Frequencies ◽  
Number Of Iterations

The design and simulation of horizontally placed H-Shaped Fractal Antenna is presented in this paper using CST Microwave Studio simulation software and the excitation is provided by using Nickel material for feeding in Y direction, wave guide port feeding method is used.. The simulated result shows that by edge cutting the directivity increases, return loss is very less and the voltage standing wave ratio is nearly equal to unity as the number of iterations increases. In generating multiple frequencies., the horizontally placed H shape fractal structure is advantageous. This antenna can be used in the Wi-Fi due to its better performance in Return loss, VSWR and directivity. In this paper four stages of this antenna is designed and simulated, the third iteration of this antenna is fabricated for Return loss and VSWR. The observations are conducted on antenna parameters such as the return loss for the frequency of 9.5 GHz is -27.6 dB and observed nearly equal value for measured results. The VSWR of both simulated and measured results are also same.

scholarly journals Impedance Matching Simulation for Microstrip Antenna on Frequency 3.4-3.7 GHz Using Double Stub

2020 ◽  
Vol 6 (2) ◽  
pp. 113-123
Author(s):  
Helfy Susilawati ◽  
Ahmad Fauzi ◽  
Akhmad Hasyim
Keyword(s):  
Transmission Line ◽  
Standing Wave ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Impedance Matching ◽  
Characteristic Impedance ◽  
Voltage Standing Wave Ratio ◽  
Antenna Impedance ◽  
Rectangular Microstrip Antenna ◽  
Reflected Power

Impedance matching is an attempt to adjust the antenna impedance with the characteristic impedance of the transmission line. Impedance matching has functions to avoid reflected power from the antenna so that power cannot be received by the receiver. In this study, impedance matching was used double stub. The voltage standing wave ratio (VSWR) indicates how well the impedance matching is made. Simulation of this impedance matching will use to microstrip antenna on frequency 3.4 – 3.7 GHz. CST Studio Suite is used to simulating the antenna microstrip with double stub. Based on the result, this research shows that VSWR and return loss in single and double rectangular microstrip antenna have a better value if use impedance matching than without using impedance matching.

Design of Antipodal Vivaldi Antenna Array

2013 ◽  
Vol 380-384 ◽  
pp. 3465-3468
Author(s):  
Hai Bo Tang ◽  
Xiao Zhong Shui
Keyword(s):  
Antenna Array ◽  
Standing Wave ◽  
Voltage Standing Wave Ratio ◽  
Radiation Characteristics ◽  
Vivaldi Antenna ◽  
Cross Structure ◽  
Structure Array

Firstly in this paper,an antipodal Vivaldi antenna is designed.The bandwidth is from 6GHz to 18GHz. The simulated results show good electric performance and the voltage standing wave ratio is less than 2 in the whole bandwidth.Secondly depending on this unit,this paper designs two kinds of arrays and estimates their radiation characteristics,respectively.The one array is a 1×8 array and the another array is a X-cross structure array with four elements.

THEORY AND DESIGN OF A COAXIAL SUPPORTING BEAD MADE OF COMPOSITE DIELECTRICS

1961 ◽  
Vol 39 (6) ◽  
pp. 926-934
Author(s):  
Gilbert H. Owyang
Keyword(s):  
Standing Wave ◽  
Frequency Ratio ◽  
Low Voltage ◽  
Coaxial Line ◽  
Wide Band ◽  
Voltage Standing Wave Ratio ◽  
Physical Parameters ◽  
Minimum Frequency ◽  
Typical Design

The effect due to the presence of a single supporting bead made of composite dielectrics in a coaxial line is being studied. A formula correlating the standing wave ratio caused by the bead and the physical parameters of the bead is derived. A bead of this type may be designed to have very low voltage standing wave ratio (VSWR) over a very wide band of frequency. A typical design using quartz and air as dielectrics is given, and the calculated VSWR is below 1.003 over a bandwidth whose maximum to minimum frequency ratio is as high as 13:1.

GROUNDING EFFECT ON THE PERFORMANCE OF UWB ICE-CREAM CONE ANTENNA

2016 ◽  
Vol 78 (5-10) ◽  
Author(s):  
Siti Rohmah Mohamed Kamaruddin ◽  
Ahmad Rakimi Mohamed ◽  
Abu Bakar Ibrahim
Keyword(s):  
Dielectric Constant ◽  
Standing Wave ◽  
Ice Cream ◽  
Voltage Standing Wave Ratio ◽  
Planar Antenna ◽  
Radiation Characteristics ◽  
Dielectric Thickness ◽  
Antenna Performance ◽  
Spectrum Band ◽  
Cst Microwave Studio

In this paper, presents the grounding effect on the performance of UWB Ice Cream Cone Antenna communication. This planar antenna designed on a FR4 substrate with the dielectric thickness, 1.6 mm and the dielectric constant Ɛr, 4.7. An analysis results for antenna with different parameter for width of feed as a ground has been investigated. The antennas were designed and simulated by using CST Microwave Studio Simulation. The proposed antenna performs from 4 GHz to 11 GHz spectrum band. The return losses, S11 for the suggestion antenna must be below than -10dB and voltage standing wave ratio, VSWR less than 2. The best grounded single ice cream cone antenna performance was obtained at 5.688 GHz with antenna sizes is 12 mm x 14.5 mm. The antenna gives omnidirectional radiation characteristics from UWB spectrum band requirement with reasonable gain values.

Super-wideband and compact omnidirectional antenna with simple structure and improved radiation properties

2016 ◽  
Vol 9 (3) ◽  
pp. 711-717 ◽  
Author(s):  
X. Chen ◽  
L. Yang ◽  
L. Wang ◽  
G. Fu
Keyword(s):  
Standing Wave ◽  
Simple Structure ◽  
Impedance Matching ◽  
Voltage Standing Wave Ratio ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Two Stage ◽  
Antenna Structure ◽  
Omnidirectional Antenna ◽  
Radiation Properties

A super-wideband (SWB) omnidirectional antenna is reported in Lau et al. in 2005 and 2008, but the antenna structure was complex and the radiation properties were unsatisfactory. In this paper, a SWB omnidirectional antenna with simple structure and improved radiation properties is presented. The antenna just consists of a two-stage inverted cone and two shorting pins. The proposed two-stage cone can improve the impedance matching in super-wide bandwidth, and the optimized shorting pins can reduce the cut-off frequency more than 50%. The calculated and measured results are investigated to confirm the antenna performances. The impedance bandwidth of the antenna for voltage standing wave ratio ≤ 2 achieves more than 1:22.1, covering 0.905 GHz to the above band. The smaller sizes than those referred by Lau et al. in 2008 are obtained. The profile of the antenna is 0.078λc, and the diameter of the radiation body is 0.217λc (λc is the wavelength of the cut-off frequency of the antenna). In addition, the radiation properties of the kind of SWB omnidirectional antenna are improved obviously. In the whole band, the ripple levels in horizontal radiation patterns are not more than 6.6 dB, and the cross-polarized levels are reduced by 9 dB.

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