scholarly journals Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels

10.3791/60874 ◽  
2020 ◽  
Author(s):  
Chriss Hammerschmidt ◽  
Robert T. Johnk ◽  
Savio Tran
Keyword(s):  
Radio Frequency ◽  
Vector Network Analyzer ◽  
Network Analyzer ◽  
Radio Frequency Propagation

scholarly journals Pendeteksian Gangguan Radio pada Band UHF yang Terpantau di Kota Makassar

2018 ◽  
Vol 5 (1) ◽  
pp. 44
Author(s):  
Irawati Razak
Keyword(s):  
Radio Frequency ◽  
Vector Network Analyzer ◽  
Radio Frequency Interference ◽  
Network Analyzer

Gangguan frekuensi oleh sinyal dari sumber transmisi frekuensi radio lainnya saat ini sudah semakin kerap terjadi khususnya di kota Makassar. Polusi frekuensi sudah semakin meningkat sejalan dengan semakin podatnya penggunaan spektrum frekuensi radio untuk berbagai keperluan. Penelitian ini bertujuan untuk mengamati dan mendeteksi gangguan sinyal radio yang mempengaruhi perfomansi/kualitas sinyal radio. Spektrum frekuensi yang akan dijadikan objek pengamatan dibatasi dalam rentang frekuensi 700 MHz sampai 950 MHz. Lokasi pengamatan di kota Makassar dengan bekerjasama Kantor Balai Monitor Frekuensi Radio Kelas II Makassar di Kabupaten Gowa, Sulawesi Selatan.Pendeteksian sinyal radio menggunakan peralatan VNA (Vector Network Analyzer) dan SPA (Signal specrum Analyzer). Kedua peralatan tersebut membedakan perfomansi sinyal radio terhadap sumber gangguan, apakah gangguan terjadi berasal dari alam atau manusia. Hasil penelitian adalah pola sinyal yang menunjukkan perfomansi/kualitas sinyal radio akibat adanya gangguan radio dalam rentang frekuensi 800 MHz hingga 950 MHz. Pendeteksian ini dapat dimanfaatkan oleh Balai Monitor Spektrum Frekuensi Radio Kelas II wilayah Makassar untuk memprediksi berat atau ringannya gangguan yang terjadi pada gelombang radio dalam beberapa tahun mendatang sehingga dapat meminimalkan terjadinya gangguan dan menangani gangguan dengan segera. Diharapkan hasil penelitian ini dapat menjadi naskah akademik bagi Kementerian Komunikasi dan Informatikan Republik Indonesia dalam membuat berbagai kebijakan dan aturan terkait dengan masalah penanggulangan Radio Frequency Interference (RFI) di Indonesia.

scholarly journals Modeling and development of radio frequency planar interdigital electrode sensors

2019 ◽  
Vol 8 (3) ◽  
pp. 985-993
Author(s):  
Muhammad Farhan Affendi bin Yunos ◽  
Anis Nurashikin Nordin ◽  
Anwar Zainuddin ◽  
Sheroz Khan
Keyword(s):  
Blood Glucose ◽  
Radio Frequency ◽  
Chemical Sensor ◽  
Vector Network Analyzer ◽  
Microwave Device ◽  
Network Analyzer ◽  
Glucose Levels ◽  
Blood Glucose Levels ◽  
Resonance Frequencies ◽  
Reflection Characteristics

The interdigital sensor has been implemented in various field of applications such as microwave device, chemical sensor and biological sensor. This work describes the design and fabrication of an interdigital sensor (IDS) design that has the potential of estimating blood glucose levels using capacitive measurements. The IDS was first designed using theoretical equations and later was optimized by using CST Microwave Studio®. The electrode widths of the sensor were varied from 0.5mm to 0.7mm and the S11 reflection characteristics were simulated.Upon completion of simulations, the sensor was fabricated using copper clad FR4 boards. The fabricated sensors were measured using a vector network analyzer (VNA) and produced resonance frequencies of 2.02, 2.11 and 2.14 GHz. The highest Q obtained was 11.72 from the 2.11 GHz sensor.

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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