High-Resolution Frequency Discriminator for Instantaneous Frequency Measurement Subsystem

Rahimpour, Hamid; Masoumi, Nasser

doi:10.1109/tim.2018.2816804

Cited by 18 publications

(9 citation statements)

References 22 publications

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“…Equations to calculate the resonant frequency of square and circular resonators can be found in [23].…”

Section: Microwave Frequency Discriminatorsmentioning

confidence: 99%

“…The resonant frequency periodicity of the resonators is used to design a multi band filter for high resolution systems, as demonstrated in [23] and [24]. The filters can replace early lengthy, heavy, and bulky coaxial delay line implementations [2,7,8].…”

Section: Microwave Frequency Discriminatorsmentioning

confidence: 99%

“…Fixed designs have a predefined number of frequency discriminators with an associated resolution and frequency of operation. They can be implemented using delay lines [6][7][8][9][10][11][12][13][14][15][16][17][18][19] using planar or coaxial transmission lines, or filters [20][21][22][23][24][25][26][27][28][29]. Discriminators based on filters and delay lines are designed to produce a frequency response associated with Gray's code, obtained after the ACD stage [30].…”

Section: Introductionmentioning

confidence: 99%

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Review of microwave frequency measurement circuits

Silva

Espinosa-Espinosa

Llamas-Garro

et al. 2022

Journal of Electromagnetic Waves and Applications

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In this work, microwave frequency measurement (MFM) is reviewed since the early stages using fully analog implementations, including its evolution to analog/digital implementations with high resolutions up to 1 MHz. The review includes fully digital implementations and microwave photonics techniques, with a discussion on achieved devices and the overall field of measuring and identifying unknown signals. MFM plays a crucial role in electronic warfare, communications, and electronic intelligence systems by identifying the frequency of unknown signals. Several microwave planar devices such as interferometers, filters, and frequency selective surfaces have been proposed to design low-cost and low-power digital MFM systems. The planar devices presented here show resolutions from 1 MHz to 940 MHz and operate in the frequency range from 0.15 GHz to 11.5 GHz, having typical bandwidths from 1 GHz to 2 GHz. MFM using microwave photonics techniques involve mapping the microwave signal into the optical spectrum to create a frequency-power function, that uniquely identifies the frequency of the unknown signal, with large bandwidths and immunity to electromagnetic interference.

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“…Equations to calculate the resonant frequency of square and circular resonators can be found in [23].…”

Section: Microwave Frequency Discriminatorsmentioning

confidence: 99%

Section: Microwave Frequency Discriminatorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Review of microwave frequency measurement circuits

Silva

Espinosa-Espinosa

Llamas-Garro

et al. 2022

Journal of Electromagnetic Waves and Applications

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show abstract

“…However, advancements in the field of frequency discriminators and instantaneous frequency measurement subsystems [51][52][53][54][55] have been reported. Microstrip-based discriminators have been seen to achieve high sensitivity and high dynamic range, with a recent work being able to attain a frequency resolution of 16 MHz by using open-loop spiral resonators instead of the more conventionally used coupled resonators [56]. High resolution and accuracy have also been obtained with quadrature microwave frequency discriminators (QMFD) [57][58][59][60][61][62].…”

Section: The Modelmentioning

confidence: 99%

Polarization-path-frequency entanglement using interferometry and frequency shifters

Majumdar,

Chandrashekar

2021

Preprint

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Higher dimensional Hilbert space along with ability to control multiple degrees of freedom of photon and entangle them has enabled new quantum protocols for various quantum information processing applications. Here, we propose a scheme to generate and control polarization-pathfrequency entanglement using the operative elements required to implement a polarization-controlled quantum walk in the path(position) space and frequency domain. Hyperentangled states manifests in the controlled dynamics using an interferometric setup where half-wave plates, beam-splitters and frequency shifters such as those based on the electro-optic effect are used to manipulate the polarization, path and frequency degrees of freedom respectively. The emphasis is on utilizing the polarization to influence the movement to a specific value in the frequency and position space. Negativity between the subspaces is calculated to demonstrate the controllability of the entanglement between them. Progress reported with experimental demonstration of realization of quantum walk using quantum states of light makes quantum walks a practical approach to generate hyperentangled states.

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“…If the determined sub-bands are uniform, an unknown signal can be identified as an ideal binary number. FDs are implemented in a variety of structures, such as interferometer [5,6], RF filter [7,8] and frequency selective surface [9]. An interferometer-based FD consists of two delay lines and a power divider/combiner.…”

Section: Introductionmentioning

confidence: 99%

Frequency discriminator design phase formula with experimental verification for frequency measurement systems with uniform sub‐band resolution

Sim

Lee

Kim

et al. 2021

Int J RF Microw Comput Aided Eng

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In this letter, we propose a frequency discriminator design method with uniform frequency sub-bands.Frequency discriminators are designed using an interferometer projected with the proposed formulated phase. For experimental verification that a uniform sub-band is formed using the proposed phase formula, 3-bit frequency discriminators are designed and fabricated to operate in the 2-3 GHz and 2-4 GHz bands, respectively. The frequency discriminator consists of a power divider/combiner, reference line and delay line. RF characteristics of the frequency discriminators are analyzed using RF simulation and measurement results. RF characteristic resultsshow that a 3-bit frequency discriminator designed using the proposed phase formula can identify an unknown signal inside the defined frequency band.

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High-Resolution Frequency Discriminator for Instantaneous Frequency Measurement Subsystem

Cited by 18 publications

References 22 publications

Review of microwave frequency measurement circuits

Review of microwave frequency measurement circuits

Polarization-path-frequency entanglement using interferometry and frequency shifters

Frequency discriminator design phase formula with experimental verification for frequency measurement systems with uniform sub‐band resolution

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