A wide dynamic range microwave frequency discriminator for cognitive radio

Chatterjee, Debalina; Blau, Kurt; Hein, Matthias

doi:10.1109/eumc.2015.7345907

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…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 [60]. High resolution and accuracy have also been obtained with quadrature microwave frequency discriminators [61][62][63][64][65][66]. Adaptive spectrum sensing techniques based on group delay induced by Brillouin scattering in optical fiber has been shown to be able to temporally discriminate two-tone signals with a resolution of 60 MHz [67].…”

Section: The Modelmentioning

confidence: 99%

Polarization-path-frequency entanglement using interferometry and frequency shifters

Majumdar¹,

Chandrashekar²

2022

J. Phys. B: At. Mol. Opt. Phys.

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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-path-frequency 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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Section: The Modelmentioning

confidence: 99%

Polarization-path-frequency entanglement using interferometry and frequency shifters

Majumdar¹,

Chandrashekar²

2022

J. Phys. B: At. Mol. Opt. Phys.

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“…Microwave frequency discriminators (MFD) and microwave phase discriminators (MPhD) are the fundamental elements of instantaneous frequency measurement (IFM) systems [1][2][3][4][5][6][7][8][9][10]. Moreover, MFDs and MPhDs are attractive for phase noise measurements of microwave oscillators [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…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. High measurement resolution and accuracy are the parameters that characterize the so-called quadrature microwave frequency discriminators (QMFD) [1][2][3][4][5][7][8][9][10]14]. The QMFDs may contain, depending on the implementation, several microwave splitters and at least two vector summation devices or mixers.…”

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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Integrated Correlator with Rat-Race Hybrids for the Wi-Fi Band Quadrature Microwave Frequency Discriminator

Rutkowski

Stadnik²

2020

2020 Baltic URSI Symposium (URSI)

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A wide dynamic range microwave frequency discriminator for cognitive radio

Cited by 3 publications

References 8 publications

Polarization-path-frequency entanglement using interferometry and frequency shifters

Polarization-path-frequency entanglement using interferometry and frequency shifters

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

Integrated Correlator with Rat-Race Hybrids for the Wi-Fi Band Quadrature Microwave Frequency Discriminator

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