A 4 bit instantaneous frequency meter at 10 GHz with coplanar YBCO delay lines

Biehl, M.; Vogt, A.; Herwig, R.; Neuhaus, M.; Crocoll, E.; Lochschmied, R.; Scherer, T.; Jutzi, W.; Kratz, Henrik; Berberich, P.; Kinder, H.

doi:10.1109/77.403040

Cited by 25 publications

(8 citation statements)

References 8 publications

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“…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%

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: 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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“…Moreover, the growing amount of radiant systems results in an increased interest for identification of unknown signals. The IFM system monitors, at the same time, all the frequencies of the band for which it was designed without the need of spectrum scanning, instantly detecting the unknown signals [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Compact coplanar interferometer for a 5–6 GHz IFM system

Oliveira

Melo

Machado

et al. 2014

JAE

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The authors present a new compact coplanar interferometer for application in an IFM system with 4 bits that operates in a frequency band from 5 to 6 GHz. This interferometer consists of a couple of coplanar two-way Wilkinson power dividers connected to two CPS lines with different signal delays. This interferometer presents smaller dimensions when compared to other designs. Details of this compact coplanar interferometer are provided along with a comparison between theoretical, simulated and measured results.

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“…Each discriminator provides one bit of the output binary word that is assigned to a certain sub-band of frequency [6]. Two-way Wilkinson power dividers are used at the input and output of each interferometer [3]. The output of each discriminator is connected to a detector.…”

Section: Introductionmentioning

confidence: 99%

A Novel LSB Discriminator for a 5 bit IFM Subsystem Based on Microstrip Band-Stop Filter

Souza

Silva

Melo

2008

2008 38th European Microwave Conference

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The authors have studied a new way to design IFM (Instantaneous Frequency Measurement) subsystem. The method is based on band-stop filters. The IFM uses rectangular open loop resonators instead of delay lines. The resonance frequency is adjusted by resonator perimeter, that must be half guided wavelength, and also by coupling distance between the resonators and the main transmission line. A LSB (least significant bit) discriminator of an IFM subsystem with resolution of 62.5MHz is designed. The device has been fabricated on RT6010.2 substrate of thickness h=1.27mm. A full wave EM simulator is used to obtain the frequency response.

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A 4 bit instantaneous frequency meter at 10 GHz with coplanar YBCO delay lines

Cited by 25 publications

References 8 publications

Review of microwave frequency measurement circuits

Review of microwave frequency measurement circuits

Compact coplanar interferometer for a 5–6 GHz IFM system

A Novel LSB Discriminator for a 5 bit IFM Subsystem Based on Microstrip Band-Stop Filter

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