scholarly journals Rancang Bangun Antena Mikrostrip Model Biquad untuk Komunikasi Wireless dengan Pandu Gelombang Coplanar pada Frekuensi 5.8 GHz

POSITRON ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 27
Author(s):  
Megastin Massang Lumembang ◽  
Bualkar Abdullah
Keyword(s):  
Ieee 802.11 ◽  
Return Loss ◽  
Vector Network Analyzer ◽  
Network Analyzer

Telah didesain dan difabrikasi sebuah antena mikrostrip model biquad yang mampu bekerja pada frekuensi wireless yaitu 5.8 GHz yang dapat digunakan sebagai media transformasi data. Antena mikrostrip didesain pada sebuah papan PCB FR4 dengan koefisien dielektrik 4.3 dan tebal 1.6 mm, kemudian didesain dengan model biquad bentuk kubus ganda dengan ukuran panjang yang sama.Pengukuran parameter antena menggunakan Vector Network Analyzer, diperoleh nilai karakterisasi antena yaitu VSWR 1.21, Return Loss-16.25dB, Bandwidth 400 MHz. Secara umum, hasil pengukuran antena model biquad yang telah difabrikasi memiliki nilai karakterisasi VSWR ≤2 dan Return Loss dibawah -9.54 dB sehingga memenuhi syarat sebagai antena komunikasi wireless yang sesuai dengan  standar industri WLAN IEEE 802.11.

scholarly journals A Novel Wineglass Shaped Wide Band Antenna for TV White Space Communication

2018 ◽  
Vol 7 (4.5) ◽  
pp. 324
Author(s):  
Ghulam Ahmad Raza ◽  
Garima Saini ◽  
Naveen Kumar
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Return Loss ◽  
Wide Band ◽  
Vector Network Analyzer ◽  
Network Analyzer ◽  
White Space ◽  
Good Match ◽  
Space Communication ◽  
Tv White Space

This paper presents a novel patch antenna for TV white spaces applications. The shape of the proposed antenna is based on the shape of a wineglass. The dimension of the proposed antenna is 170 mm x 120 mm x 1.6 mm. After simulation, the proposed antenna resonates at 703 MHz with a return loss of -21.97 dB and covering a bandwidth from 495 MHz to 1540 MHz. Overall bandwidth coverage is 1045 MHz. So the proposed antenna is a wide band antenna covering almost the entire TV Ultra High Frequency (UHF) range. Simulated VSWR obtained at 703 MHz is 1.38 dB and simulated gain is 2.32 dB. The proposed antenna is fabricated using FR4 substrate and tested on Vector Network Analyzer (VNA). The measured return loss of fabricated antenna is -20.20 dB at 596 MHz. Proposed antenna shows the simulated radiation efficiency of 95%. Simulated and measured results showed good match between them. Proposed design is compared with few designs available in literature to validate its novelty and advantages. 

scholarly journals PERANCANGAN DAN REALISASI BANDPASS FILTER DENGAN METODE OPEN LOOP SQUARE RESONATOR UNTUK MICROWAVE LINK

2016 ◽  
Vol 7 (3) ◽  
Author(s):  
Naufal Rizki Rinditayoga ◽  
Dian Widi Astuti
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Open Loop ◽  
Vector Network Analyzer ◽  
Network Analyzer ◽  
Point To Point ◽  
Microwave Link

Dalam  dunia  telekomunikasi,  antena  parabola ini  dipakai  oleh  perangkat  yang dinamai  perangkat  transmisi  radio  microwave (gelombang  mikro) point  to  point.  Microwave link  sendiri  merupakan  sistem  komunikasi  yang  menggunakan  gelombang  radio  pada  rentang frekuensi gelombang mikro untuk mengirimkan video, audio, atau data antara dua lokasi yang terpisah, yang dapat digunakan hanya beberapa meter sampai dengan beberapa kilometer. Untuk mendukung    teknologi  tersebut,  tidak  lepas  dari  sebuah  yang  bernama  filter.  Filter  sendiri merupakan salah satu komponen penting dalam komunikasi wireless.Dasar  penelitian  ini  yaitu  bertujuan  untuk  membuat  sebuah  bandpass  filter  yang  dapat meloloskan frekuensi pada microwave link yaitu pada frekuensi 7,1 GHz – 7,7 GHz. Dari hasil pengukuran respon filter pada alat vector network analyzer didapatkan hasil yang berbeda antara spesifikasi,  simulasi  dan  fabrikasi.  Hasil  dari  penelitian  ini  Bandpass  filter  bekerja  pada frekuensi 7,1 – 7,7 GHz. Pada hasil simulasi menggunakan HFSS didapatkan nilai return loss (S11)  filter  sebesar  -27,48 dB  dan  insertion loss (S21)  sebesar  -0,43 dB. Sedangkan pada hasil pengukuran  menggunakan  VNA  didapatkan  nilai  return  loss  (S11)  filter  sebesar  -28,2  dB  dan insertion loss (S21) sebesar -0,53 dBKata  kunci  :  Bandpass  filter,    Open  Loop  Square  Resonator,  Microwave  link

Reconfigurable SDM Optical Vector Network Analyzer

2014 ◽  
Author(s):  
Joel Carpenter ◽  
Benjamin J. Eggleton ◽  
Jochen Schröder
Keyword(s):  
Vector Network Analyzer ◽  
Network Analyzer

scholarly journals Wideband Active Load–Pull by Device Output Match Compensation Using a Vector Network Analyzer

2021 ◽  
Vol 69 (1) ◽  
pp. 874-886
Author(s):  
Alberto Maria Angelotti ◽  
Gian Piero Gibiino ◽  
Troels S. Nielsen ◽  
Dominique Schreurs ◽  
Alberto Santarelli
Keyword(s):  
Vector Network Analyzer ◽  
Network Analyzer ◽  
Active Load ◽  
Load Pull

scholarly journals Simulation and Experimental Study of the Near Field Probe in the Form of a Folded Dipole for Measuring Glucose Concentration

2021 ◽  
Vol 11 (12) ◽  
pp. 5415
Author(s):  
Aleksandr Gorst ◽  
Kseniya Zavyalova ◽  
Aleksandr Mironchev ◽  
Andrey Zapasnoy ◽  
Andrey Klokov
Keyword(s):  
Experimental Measurement ◽  
Glucose Concentration ◽  
Field Experiments ◽  
Near Field ◽  
Vector Network Analyzer ◽  
Human Hand ◽  
Physical Parameters ◽  
Network Analyzer ◽  
Frequency Range ◽  
Average Deviation

The article investigates the near-field probe of a special design to account for changes in glucose concentration. The probe is designed in such a way that it emits radiation in both directions from its plane. In this paper, it was proposed to modernize this design and consider the unidirectional emission of the probe in order to maximize the signal and reduce energy loss. We have done extensive research for both bidirectional and unidirectional probe designs. Numerical simulations and field experiments were carried out to determine different concentrations of glucose (0, 4, 5.3, 7.5 mmol/L). Numerical modeling of a unidirectional probe showed that the interaction of radiation generated by such a probe with a multilayer structure simulating a human hand showed a better result and high sensitivity compared to a bidirectional probe. Further, based on the simulation results, a phantom (physical model) of a human hand was recreated from layers with dielectric properties as close as possible to the properties of materials during simulation. The probe was constructed from a copper tube and matched both the geometric and physical parameters of the model. The experimental measurement was carried out using a vector network analyzer in the frequency range 2–10 GHz. The experimental measurement was carried out using a vector network analyzer in the frequency range 2–10 GHz for the unidirectional and bidirectional probes. Further, the results of the experiment were compared with the results of numerical simulation. According to the results of multiple experiments, it was found that the average deviation between the concentrations was 2 dB for a unidirectional probe and 0.4 dB for a bidirectional probe. Thus, the sensitivity of the unidirectional probe was 1.5 dB/(mmol/L) for the bidirectional one 0.3 dB/(mmol/L). Thus, the improved design of the near-field probe can be used to record glucose concentrations.

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