scholarly journals Desain dan Manufaktur Antena Heliks Oktafilar Pada Frekuensi 436,5 MHz Untuk Sistem Komunikasi Satelit

2018 ◽  
Vol 6 (2) ◽  
pp. 27
Author(s):  
Heri Agus Susanto
Keyword(s):  
Return Loss ◽  
Uhf Band ◽  
Cst Microwave Studio

Antena heliks oktafilar merupakan antena modifikasi dari antena heliks. Proyek akhir ini berfokus pada perancangan dan pembuatan antena heliks bifilar pada frekuensi 436,5 MHz. Frekuensi 436,5 MHz merupakan frekuensi UHF-Band yang sering diaplikasikan dalam sistem komunikasi satelit saat ini. Hasil simulasi antena menunjukkan bahwa antena ini dapat bekerja pada frekuensi 436,5 MHz.Antena heliks oktafilar didesain menggunakan perancangan optimum berdasarkan spesifikasi yang telah ditetapkan dan dilakukan simulasi antena dengan menggunakan software CST Microwave Studio 2011 dengan hasil return loss sebesar -32,656 dB pada diameter kawat 1,5 mm dan bandwidth sebesar 7,33 MHz. sedangkan pada diameter kawat 1,5 mm, hasil return loss sebesar -23,545 dB pada diameter kawat 1,7 mm dan bandwidth sebesar 8,35 MHz. Nilai VSWR pada diameter 1,5 mm adalah 1,0477. Untuk diameter 1,7 mm VSWR sebesar 1,1425 dan gain yang diperoleh dari hasil simulasi pada diameter 1,5 mm adalah sebesar 1,99 dBi, sedangkan untuk gain pada diameter 1,7 mm sebesar 2,07 dBi.Hasil realisasi antena pada antena heliks oktafilar menghasilkan return loss sebesar -11,21 dB pada diameter kawat 1,5 mm dan bandwidth sebesar 60,954 MHz. sedangkan hasil return loss sebesar -11,07 dB pada diameter kawat 1,7 mm dan bandwidth sebesar 90,007 MHz. Nilai VSWR pada diameter 1,5 mm adalah 1,76. Untuk diameter 1,7 mm VSWR sebesar 1,79 dan gain yang diperoleh dari hasil simulasi pada diameter 1,5 mm adalah sebesar 3,63 dBi .sedangkan untuk gain pada diameter 1,7 mm sebesar 4,15 dBi.

scholarly journals DESAIN ANTENA MIKROSTRIP UNTUK ALTERNATIF ANTENA SIDEBAND DVOR (DOPPLER VHF OMNIDIRECTIONAL RANGE)

2020 ◽  
Vol 5 (1) ◽  
pp. 50-58
Author(s):  
Totok Warsito ◽  
Yuyun Suprapto ◽  
Margono Margono ◽  
Romma Diana
Keyword(s):  
Return Loss ◽  
Cst Microwave Studio

Antena merupakan salah satu perangkat penting yang ada pada sistem navigasi Doppler VOR (DVOR). Saat ini pengembangan antena dengan biaya produksi rendah menjadi salah satu alternatif tujuan para peneliti. Salah satu teknologi yang banyak digunakan sebagai solusinya adalah antena berbasis mikrostrip. Sebab antena berbasis mikrostrip menawarkan biaya produksi yang sangat rendah dibandingkan dengan jenis antena lain. Antena yang dipakai pada sistem DVOR saat ini adalah antena Alford Loop. Pada penelitian ini dilakukan perancangan antena mikrostrip rectangular dengan pencatuan coaxial sebagai alternatif antena DVOR yang bekerja pada frekuensi VHF (frekuensi 108-118 MHz), sehingga hal ini memungkinkan biaya produksi yang lebih murah dibandingkan antenna Alford Loop pada umumnya. Perancangan dan simulasi antena dilakukan menggunakan software CST Microwave Studio menggunakan material FR-4 dengan konstanta dielektrik (). Hasil perancangan dan simulasi antena menunjukkan return loss (S11) sebesar -16.1 dB dan gain sebesar 4 dB pada frekuensi 113 MHz. Dari hasil simulasi juga dapat diketahui bahwa memiliki polarisasi linier horizontal dan polaradiasi yang bersifat omni-directional.

Design of a Reader Antenna for UHF RFID

2014 ◽  
Vol 936 ◽  
pp. 2220-2224
Author(s):  
Hong Yang ◽  
Li Guo
Keyword(s):  
Numerical Simulation ◽  
Return Loss ◽  
Impedance Bandwidth ◽  
Uhf Rfid ◽  
Reader Antenna ◽  
Simulation Results ◽  
Uhf Band

A compact and circular polarized antenna for UHF band RFID handset reader was designed, and realized by cutting slits in the antenna patch and etching slots on the ground. Numerical simulation was performed for the characteristics of the antenna with the software HFSS 13.0.The simulation results show that when the size of antenna patch is 68mm×68mm, -10dB return loss impedance bandwidth is 49MHz,VSWR is less than 2 and the largest gain is -0.61dB for antenna in 907～931MHz. Compared with the traditional reader antenna with the same material of the substrate，the improved antenna has a much higher gain．and the size was reduced by 20% and the max gain is raised -0.11dB.

scholarly journals Design and Simulation of Spoon Shaped Antenna using DGS

2019 ◽  
Vol 9 (2) ◽  
pp. 2257-2259
Keyword(s):  
Return Loss ◽  
Antenna Design ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Antenna Structure ◽  
Comparison Results ◽  
Wireless Application ◽  
Cst Microwave Studio

A planer spoon shaped antenna with defected ground structure (DGS) is designed and fabricated for wireless application. The proposed antenna design exhibits 1.6GHz bandwidth, 2.20dBi Avg. Gain and maximum return loss of -24.5dB, which offers better results in wideband application. The Proposed antenna structure is simulated by software CST MWS (CST Microwave Studio) version 2018 and later comparison results are also presented

scholarly journals PENGEMBANGAN ANTENA ARRAY DENGAN STRUKTUR MEBG UNTUK MENGURANGI EFEK MUTUAL COUPLING

2019 ◽  
Vol 2 (1) ◽  
pp. 1-7
Author(s):  
Raka Kurnia ◽  
Efri Sandi ◽  
Wisnu Djatmiko
Keyword(s):  
Mutual Coupling ◽  
Return Loss ◽  
Band 3 ◽  
Network Analyzer ◽  
Cst Microwave Studio

Abstrak. Penelitian ini bertujuan untuk mengurangi efek mutual coupling dari antena array dengan tiga elemen. Peneliti menggunakan tambahan struktur MEBG dengan sampel frekuensi S-band 3 GHz. Penelitian dilakukan di Laboraturium Telekomunikasi Fakultas Teknik Universitas Negeri Jakarta pada bulan September 2017 – September 2018. Pengujian terhadap antena mikrostrip dengan tambahan struktur MEBG dilakukan dalam dua tahap, yaitu saat simulasi dan setelah fabrikasi. Terdapat dua antena pada setiap tahapannya yaitu array tanpa penambahan MEBG dan antena array dengan MEBG. Kedua antena dibandingkan sebagai usaha untuk mengukur efektifitas antena. Simulasi menggunakan bantuan software CST Microwave Studio Suite 2014 &2016 dan antena yang telah difabrikasi diukur dengan bantuan Network Analyzer merk Anritsu S223E. Penambahan struktur MEBG ini berhasil mengurangi nilai mutual coupling sebesar 0,51 dB, dan juga mempengaruhi efek mutual coupling yang berimbas pada naiknya impedansi input sebesar 1,09 Ω. Selain itu dengan struktur MEBG dapat menaikan performansi antena diantaranya berhasil menurunkan nilai return loss, dan membuat antena semakin matching.

scholarly journals Microstrip-Fed Circular Disc Monopole Antenna with Defected Waveguide Structure

2018 ◽  
Vol 8 (1) ◽  
pp. 189 ◽  
Author(s):  
S. J. Chin ◽  
M. Z. A. Abd. Aziz ◽  
M. R. Ahmad
Keyword(s):  
Return Loss ◽  
Waveguide Structure ◽  
Monopole Antenna ◽  
Circular Disc ◽  
Inner Surface ◽  
Parametric Studies ◽  
Low Efficiency ◽  
Cst Microwave Studio

This paper presented the microstrip-fed circular disc monopole antenna with defected waveguide structure. First, the microstrip-fed circular disc monopole antenna was designed. Next, the monopole antenna was designed with waveguide and lastly followed by the defected waveguide structure where the uniplanar compact (UC) structure was used. CST Microwave studio software was used for simulation and parametric studies process. Initially, the microstrip-fed circular disc monopole antenna was designed to achieve return loss less than -10dB for wideband frequencies. Then, the gain and directivity was improved with the integration of waveguide. The highest directivity of 11.38dBi found at 13.5GHz. However, low efficiency and narrower bandwidth were obtained. Next, uniplanar compact defected waveguide structure (UC DWS) was designed at inner surface of waveguide. The bandwidth achieved 3.09GHz where it covered from 10.91GHz to 14GHz. Meanwhile, the directivity maintained higher than the monopole antenna with highest directivity of 8.84dBi at 10GHz. The gain was also improved from 11GHz to 14GHz with highest gain of 6.38dB occurred at 13.5GHz.

Yagi-Uda Antenna for Navigational Aids Using HFSS

2017 ◽  
Vol 8 (3) ◽  
pp. 627
Author(s):  
Ramesh P. ◽  
V. Mathivanan
Keyword(s):  
Radiation Pattern ◽  
Frequency Band ◽  
High Frequency ◽  
Return Loss ◽  
Impedance Matching ◽  
Radiation Patterns ◽  
Ultra High Frequency ◽  
Navigational Aids ◽  
The Stability ◽  
Uhf Band

<p>In this paper, the ultra high frequency of yagi-uda antenna for navigational has been designed to improve the usable bandwidth by improving the stability of the radiation patterns. The frequency band of ultra high frequency is 300-3000 MHZ. The main aim of this paper is to reduce the loss, improve the gain and also to enhance the efficiency of ultra high frequency yagi-uda antenna for utilizing the navigational aids. The proposed UHF band of Yagi-Uda antenna has been designed by using ANSYS HFSS tool for the application of navigational aids. The characteristics specifications of yagi-uda antenna such as Radiation pattern, S11 (return loss), impedance matching and gain are analyzed in this work.</p>

scholarly journals Design of Horse Shoe Patch antenna for wireless Applications

2018 ◽  
Vol 3 (1) ◽  
pp. 14-16
Author(s):  
N. Jayanti ◽  
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Substrate Material ◽  
Antenna Design ◽  
Substrate Thickness ◽  
Far Field ◽  
Wireless Applications ◽  
Substrate Layer ◽  
Cst Microwave Studio

This paper illustrates the design and analysis of a horseshoe patch antenna and compares the results of antenna for Duroid (ɛr = 2.2), Rogers RO4350 (ɛr = 3.66) and FR-4 (ɛr = 4.3) as substrate material and another comparison is between proposed antenna with and without an upper layer of substrate (duroid). The substrate thickness taken for this antenna is 1.57mm and for the substrate layer above the patch, thickness is 0.2mm. Comparison of these different structures has been done on the basis of return loss, VSWR, efficiency, and far-field. In these structures, a horse shoe-shaped patch is placed above the substrate. The proposed antenna has been designed and simulated using CST microwave studio 2014. The proposed antenna design can be used for WLAN, WiMAX, and IMT applications.

scholarly journals A Broadband Circularly Polarized Stacked Probe-Fed Patch Antenna for UHF RFID Applications

2007 ◽  
Vol 2007 ◽  
pp. 1-8 ◽  
Author(s):  
Hang Leong Chung ◽  
Xianming Qing ◽  
Zhi Ning Chen
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Uhf Rfid ◽  
Circularly Polarized ◽  
Parametric Studies ◽  
Hybrid Coupler ◽  
Rfid Applications ◽  
Uhf Band

A broadband circularly polarized stacked probe-fed antenna suitable for UHF RFID applications is presented and studied. The proposed antenna is fed by two probes which are connected to a hybrid coupler. Two parasitic patches are stacked above a primary probe-fed patch to enhance the bandwidth of the antenna. The optimized antenna prototype achieves gain of more than 6.5 dBic, axial ratio of less than 3.0 dB, and return loss of less than−15 dB over the UHF band of 820–980 MHz (17.7%). Parametric studies are carried out to demonstrate the effects of antenna geometry parameters on the performance. The proposed antenna can be a good candidate for UHF RFID applications.

Sign in / Sign up

Export Citation Format

Share Document