Delay Lines Based on Coupled Slow-Wave Structures

Pchelnikov, Yuriy N.; Nyce, David S.

doi:10.1109/euma.2003.340905

Cited by 2 publications

(2 citation statements)

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“…However, RF delay lines can be made using materials with a high electric permittivity and magnetic permeability, to reduce signal speed. In addition, specific impedance conductor configurations exist, that can further reduce the delay component size (Pchelnikov and Nyce 2003). Further, there are commercially available solutions to achieve much more compact delay lines than employed in the prototype setup (figure 4).…”

Section: Discussionmentioning

confidence: 99%

Electrical delay line multiplexing for pulsed mode radiation detectors

2015

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Medical imaging systems are composed of a large number of position sensitive radiation detectors to provide high resolution imaging. For example, whole-body Positron Emission Tomography (PET) systems are typically composed of thousands of scintillation crystal elements, which are coupled to photosensors. Thus, PET systems greatly benefit from methods to reduce the number of data acquisition channels, in order to reduce the system development cost and complexity. In this paper we present an electrical delay line multiplexing scheme that can significantly reduce the number of readout channels, while preserving the signal integrity required for good time resolution performance. We experimented with two 4 × 4 LYSO crystal arrays, with crystal elements having 3 mm × 3 mm × 5 mm and 3 mm × 3 mm × 20 mm dimensions, coupled to 16 Hamamatsu MPPC S10931-050P SiPM elements. Results show that each crystal could be accurately identified, even in the presence of scintillation light sharing and inter-crystal Compton scatter among neighboring crystal elements. The multiplexing configuration degraded the coincidence timing resolution from ~ 243 ps FWHM to ~272 ps FWHM when 16 SiPM signals were combined into a single channel for the 4 × 4 LYSO crystal array with 3 mm × 3 mm × 20 mm crystal element dimensions, in coincidence with a 3 mm × 3 mm × 5 mm LYSO crystal pixel. The method is exible to allow multiplexing configurations across different block detectors, and is scalable to an entire ring of detectors.

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Section: Discussionmentioning

confidence: 99%

Electrical delay line multiplexing for pulsed mode radiation detectors

2015

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“… meander lines [15][16][17][18][19], especially multi-layered with interlayer connections by via holes (3-D meander) [20,21]  interdigital structures [22]  spiral lines  coupled lines in the form of microwave bandpass filter optimized for flat group delay in required frequency band…”

Section: Planar Structuresmentioning

confidence: 99%

Microwave delay lines for analogue signal correlation

Szczepaniak

Susek

2020

Radioelectronic Systems Conference 2019

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Noise radars use random or pseudo-random signals to illuminate a target and coherent detection techniques in order to process received noise signals. In the range of microwave frequencies the simple analogue systems of the correlative detector may be used. It helps to overcome the fact that the real digital implementation of the autocorrelation function for these frequencies is very difficult. A correlator receiver is a typical element of the noise radar. The important issue is that coherent reception needs delay lines of constant or variable parameters to be applied in the receiving systems. To address this issue the paper comprises comparison of available technologies of microwave analogue delay lines. The advantages and disadvantages of presented solutions are presented. The paper comprises: the types of basic delay unit technologies, tunable and controlled-delay lines.

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Delay Lines Based on Coupled Slow-Wave Structures

Cited by 2 publications

References 0 publications

Electrical delay line multiplexing for pulsed mode radiation detectors

Electrical delay line multiplexing for pulsed mode radiation detectors

Microwave delay lines for analogue signal correlation

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