scholarly journals Development of a Microwave Sensor for Solid and Liquid Substances Based on Closed Loop Resonator

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8506
Author(s):  
Aiswarya S ◽  
Sreedevi K. Menon ◽  
Massimo Donelli ◽  
Meenu L
Keyword(s):  
Dielectric Property ◽  
Experimental Validation ◽  
Closed Loop ◽  
Food Samples ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Dielectric Sensor ◽  
Microwave Sensor ◽  
Band Stop Filter ◽  
Band Pass

In this work, a compact dielectric sensor for the detection of adulteration in solid and liquid samples using planar resonators is presented. Six types of filter prototypes operating at 2.4 GHz are presented, optimized, numerically assessed, fabricated and experimentally validated. The obtained experimental results provided an error less than 6% with respect to the simulated results. Moreover, a size reduction of about 69% was achieved for the band stop filter and a 75% reduction for band pass filter compared to standard sensors realized using open/short circuited stub microstrip lines. From the designed filters, the miniaturised filter with Q of 95 at 2.4 GHz and size of 35 mm × 35 mm is formulated as a sensor and is validated theoretically and experimentally. The designed sensor shows better sensitivity, and it depends upon the dielectric property of the sample to be tested. Simulation and experimental validation of the designed sensor is carried out by loading different samples onto the sensor. The adulteration detection of various food samples using the designed sensor is experimentally validated and shows excellent sensing on adding adulterants to the original sample. The sensitivity of the sensor is analyzed by studying the variations in resonant frequency, scattering parameters, phase and Q factor with variation in the dielectric property of the sample loaded onto the sensor.

Notice of Retraction: Experimental Validation of a 3D FSS Designed by Periodic Conductive Fibers Part-1: Band-Pass Filter Characteristic

2017 ◽  
Vol 59 (6) ◽  
pp. 1841-1847 ◽  
Author(s):  
Muhammet Hilmi Nisanci ◽  
Ahmet Yahya Tesneli ◽  
Nigar Berna Tesneli ◽  
Fatih Ustuner ◽  
Ekrem Demirel ◽  
...  
Keyword(s):  
Experimental Validation ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Filter Characteristic ◽  
Band Pass ◽  
Conductive Fibers

A Novel Three-Port Combiner Based on Coaxial Cavity

2012 ◽  
Vol 605-607 ◽  
pp. 1924-1928
Author(s):  
Su Nan Zhang ◽  
Qiang Ye ◽  
Chang Wei Luo
Keyword(s):  
Return Loss ◽  
Ultra Wideband ◽  
Band Pass Filter ◽  
The Novel ◽  
Pass Filter ◽  
Coaxial Cavity ◽  
Transmission Zero ◽  
Band Stop Filter ◽  
Band Pass ◽  
Good Agreement

In this paper, a novel three-port combiner based on coaxial cavity is presented, which consists of a band-pass filter with a transmission zero and a ultra-wideband band-stop filter, and the combiner is different to the conventional combiner based on microstrip or stripline. The design and simulated results show that the novel combiner has a good performance, which are insert loss more than -0.5dB and return loss less than -20dB between the GSM/DCS/TD band (800-2170MHz) and WLAN band (2400-2500MHz), the isolation in both bands less than -85dB, respectively. In addition, the performances of the novel combiner are demonstrated experimentally, the measured results have good agreement with simulated results.

Design Of Multilayer Type 2-pole Band Pass Filter With Additional Poles Using Closed Loop Resonator

2005 ◽  
Author(s):  
Heon-Jin Hong ◽  
Dong-Phil Jang ◽  
In-Seon Kim ◽  
Chul-Soo Kim ◽  
Min-Ho Chung ◽  
...  
Keyword(s):  
Closed Loop ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass

scholarly journals Switchable Terahertz Band-Pass/Band-Stop Filter Enabled by Hybrid Vanadium Dioxide Metamaterial

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Ying Chen ◽  
Jianwei Cheng ◽  
Chaowu Liang
Keyword(s):  
Vanadium Dioxide ◽  
Surface Current ◽  
Center Frequency ◽  
Pass Band ◽  
Metallic State ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Stop Filter ◽  
Band Pass ◽  
Functional Components

To date, little research has been carried out on the integration of switchable and diversified functionalities into a single metamaterial in the terahertz (THz) range. Here, a hybrid vanadium dioxide (VO2) metamaterial was designed with switchable properties of band-pass filter and band-stop filter in the frequency range of 0.3–1.6 THz. Simulations demonstrated that under TE polarization, the proposed system acted as band-stop filter with the center frequency of 0.95 THz when VO2 is in the insulating state. Upon the transformation of VO2 into the metallic state, the proposed system behaved as a band-pass filter with a transmittance of >80%. The physical mechanism of the band-pass/band-stop conversion was examined by analyzing the surface current distribution of the designed device. The switchable characteristics of this structure can enable its wide application in tunable THz functional components such as amplitude modulators, polarization control, and intelligent switches.

scholarly journals Simulasi Perancangan Filter Analog dengan Respon Chebyshev

2013 ◽  
Vol 1 (2) ◽  
pp. 106
Author(s):  
RUSTAMAJI RUSTAMAJI ◽  
ARSYAD RAMADHAN DARLIS ◽  
SOLIHIN SUPARMAN
Keyword(s):  
User Interface ◽  
Graphical User Interface ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Band Stop Filter ◽  
Low Pass ◽  
Band Pass ◽  
High Pass ◽  
Filter Response

ABSTRAKDalam suatu sistem komunikasi penggunaan rangkaian filter sangat penting. Salah satu cara untuk memudahkan dalam perancangan sebuah filter dilakukanlah teknik simulasi. Penelitian ini bertujuan untuk merancang simulasi yang menghasilkan respon filter jenis chebyshev serta menghasilkan nilai komponen induktor (L) dan kapasitor (C) yang dibutuhkan untuk merangkai filter. Simulasi yang dirancang pada penelitian ini menggunakan Graphical User Interface (GUI). Dari simulasi yang dilakukan, didapatkan respon Chebyshev pada low pass filter, high pass filter, band pass filter, dan band stop filter sudah sesuai dengan input yang dimasukkan ke dalam parameter program dan sesuai dengan teori respon filter Chebyshev. Hasil Simulasi dari rangkaian band pass filter dan band stop filter dengan menggunakan Electronic Workbench (EWB), menunjukkan respon dengan pergeseran frekuensi sebesar 0,1 kHz lebih tinggi dari frekuensi yang diharapkan.Kata Kunci: filter, Chebyshev, band, respon frekuensi. ABSTRACTOn communication system using filter is very important. One way to simplify the design of filter undertaken a simulation technique. This research aims to design a simulation that generates the filter response of chebyshev and generate the value component of the inductor (L) and capacitor (C) that needed for constructing the filter. This Simulation using Graphical User Interface (GUI). From result simulation, response in low pass filter, high pass filter, band pass filter, band stop filter and is in compliance with the input entered into the program and in accordance with the theory of Chebyshev filter response. The simulation of the band pass filter and bands stop filter by using electronic workbench ( EWB ), show a response with shifts frequency of 0.1 khz higher than frequency expected.Keywords: filter, Chebyshev, band, frequency respons

Design of Multilayer Type 2-Pole Band Pass Filter with Additional Poles using Closed Loop Resonator

1997 ◽  
Author(s):  
Heon-Jin Hong ◽  
Dong-Phil Jang ◽  
In-Seon Kim ◽  
Chul-Soo Kim ◽  
Min-Ho Chung ◽  
...  
Keyword(s):  
Closed Loop ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass

scholarly journals Design of Dual Ultra–Wideband Band–Pass Filter Using Stepped Impedance Resonator λg/4 Short Stubs and T–Shaped Band-Stop Filter

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1951
Author(s):  
Kicheol Yoon ◽  
Kwanggi Kim
Keyword(s):  
Wireless Communication ◽  
Insertion Loss ◽  
Communication Systems ◽  
Dual Band ◽  
Wireless Communication Systems ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Stop Filter ◽  
Band Pass ◽  
Stepped Impedance Resonator

Portable wireless communication systems are increasingly in demand in small sizes for human convenience. In wireless communication systems, the performance, size, and unit cost are very important. A band−pass filter is important to sharp cut–off frequency characteristics, size, and frequency selectivity in wireless communication systems. The band−pass filter has three types of techniques in the transmission−zero method, stub−loaded resonator, and stepped impedance resonator for the sharp cut−off frequency characteristic, adjustable bandwidth, and excellent frequency response characteristics. To obtain these characteristics, the impedance ratio and length of a stub are mainly adjusted. It also utilizes a multi–mode technique to increase bandwidth. However, it is analyzed that the problem of reducing the size of the device still remains. To solve these problems, the paper is applied to a stub−loaded resonator and a stepped impedance resonator to control the impedance ratio and the length of the stub to obtain the results of the transmission−zero method, bandwidth control, and size reduction through the folded structure. Dual−band bandwidth was secured by integrating a T−shaped band−stop filter. The designed band–pass filter has center frequencies of 243 GHz and 7.49 GHz, and the insertion loss of a proposed band−pass filter is 0.102 dB and 0.103 dB. Additionally, the return loss of a proposed band−pass filter is 19.13 dB and 19.96 dB, respectively. The bandwidth of a filter is 120% and 105%, respectively. The size of the filter is 0.0708 λg × 0.0533 λg. The designed filter has a good skirt phenomenon, small size, low insertion loss, and dual−band characteristics.

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