Discriminators for Instantaneous Frequency Measurement Subsystem Based on Open-Loop Resonators

Souza, Maria do Carmo; Silva, F. e; Melo, M. T. de; Novo, Lauro R. G. S. L.

doi:10.1109/tmtt.2009.2027179

Cited by 38 publications

(35 citation statements)

References 7 publications

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“…The input signal is divided into two or more parts and they travel through different paths [23,24] 154 U. R. C. VITOR AND M. T. D. MELO like one regards in the multipath model. Interference occurs when two or more signals with the same frequency find each other.…”

Section: Theorymentioning

confidence: 99%

“…To obtain the mentioned parameters, the proposed method carries out an analogy with interferometer theory in frequency domain, on the same way that is approached in normal microwave papers [23] Besides, a typical PLC channel has multipaths and polynomial attenuation [2,24]. Neglecting any attenuation, a coaxial cable network can present the same behavior as a PLC channel.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison between power line communication multipath model and coaxial cable interferometer theory

Vitor

Melo

2012

Int J Communication

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The authors have studied a new method to find parameters of broadband power line communication channel model. Lossless power line communication channel model is compared with classical interferometers approach to develop this model. The authors also used coaxial cables to simulate a multipath channel, because it can behave like a lossless power line communication channel. Thus, measurements were carried out with a network analyzer to find S parameters. The modeling parameters, for the multipath model were found after using MATLAB software and classical interferometers approach. Then, theoretical and experimental results are presented and compared. received the BS degree in Eletrical Electronic Engineering from the Federal University of Pernambuco, Recife, Brazil, in 2006. In 2008 he received the MS degree also in Electrical Engineering at the same University, where his dissertation focused on Power Line Communication. His present research interests include the modeling of BPLC channel and evaluation of the performance of BPLC in transmitting voice, video and data. Marcos T. de Melo received the BS in Physics from the Federal University of Pernambuco-UFPE, Brazil, in 1983. Continuing his studies at the same university he received the MS degree also in Physics in 1992, where his dissertation focused on Microwave Absorption on Superconducting Samples. In 1997, he received the PhD degree from Birmingham University, England, where his thesis focused on High Temperature Superconducting Devices. In 1999, he joined the Department of Electronics and Systems, UFPE. His present research interests include the design and fabrication of coplanar structures in microwave frequencies, like resonator, power divider, filter, delay line, instantaneous frequency measurement systems, superconducting transmission line, power line communication and also dielectric properties in terahertz.

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Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison between power line communication multipath model and coaxial cable interferometer theory

Vitor

Melo

2012

Int J Communication

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“…Some simpler and lower cost methods but with poor accuracy were presented, by using coplanar strips (CPS) delay-line and multiple band-stop filters [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A New Low Cost Instantaneous Frequency Measurement System

Badran¹,

Deeb²

2017

PIER M

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Abstract-A new low cost method for implementing an Instantaneous Frequency Measurement (IFM) system is presented in this paper. The proposed method is based on dividing the incoming RF signal into four signals and filtering each one by an appropriate band-pass filter. The frequency is then estimated from the power level of the filtered signals. A closed form for the Standard Deviation (STD) and the bias of the frequency estimator is derived. A design example for an IFM system with a working frequency band of 2 to 4 GHz is presented with simulated and measured results. The design is implemented on a commercial FR4 (DE104) substrate using printed circuit board technology. Experiments in a laboratory show a maximum error of about 15 MHz in estimating the frequency value.

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“…As a good example, a coplanar interferometer based on interdigital delay line with different finger lengths, will be presented. Another example of interferometers, but now, implemented with micro strip multi-band-stop filters to obtain signals similar to those supplied by the interferometers was published recently and will be presented here as well [9,10].…”

Section: Introductionmentioning

confidence: 99%