A 6-bit Instantaneous Frequency Discriminator Based on Band-Stop Resonators

Rahimpour, Hamid; Masoumi, Nasser

doi:10.1109/icee.2018.8472583

Cited by 8 publications

(3 citation statements)

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“…In [28], 2018, a 6-bit frequency discriminator based on microstrip filters is A 7-bit, high-sensitivity, compact size structure for instantaneous frequency measurement receiver is reported in [25], 2018. The proposed structure utilizes seven small-size, high-performance, microstrip band-stop filters to shape the frequency bandwidth based on binary division.…”

Section: Admfm Based On Filtersmentioning

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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Section: Admfm Based On Filtersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review of microwave frequency measurement circuits

Silva

Espinosa-Espinosa

Llamas-Garro

et al. 2022

Journal of Electromagnetic Waves and Applications

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“…There are also known quite simply as so-called single-function microwave frequency discriminators (SFMFD). Such devices are built of one microwave power splitter (power divider or directional coupler) and one microwave vector combiner or mixer [1,15,16,[23][24][25][27][28][29] or use several band-stop microwave filters [30]. These types of instruments, i.e., SFMFD, can be used in cases when the accuracy of a frequency measurement is not a main requirement, 2 of 16 but their small size plays a particularly significant role.…”

Section: Introductionmentioning

confidence: 99%

2.45 GHz Band Quadrature Microwave Frequency Discriminators with Integrated Correlators Based on Power Dividers and Rat-Race Hybrids

Rutkowski

Stadnik

2021

Electronics

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Instantaneous frequency measurement devices are useful for conducting extremely fast measurements of the current frequency value of microwave signals, even if their duration is extremely short. This paper presents the principle of determination of temporary values of the microwave signal phase and frequency using interferometer techniques, based on passive microwave components. Additionally, the structures and results of measurements of two novel versions of integrated microwave correlators for microwave frequency discriminators, made on a single printed circuit board, are shown. Three Wilkinson-type, single-stage power dividers, and two rat-race hybrids create the developed correlators. The developed devices were designed to work over a wide frequency range, i.e., of 1.6–3.1 GHz, and can be used to monitor Wi-Fi devices as well as pulse and CW radar systems operating in the S band. They can also be applied in passive radars and active Doppler radars. The view of the printed circuits boards and results of measurements are presented. Recommendations for improving the accuracy of measurement are proposed.

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