A stepped-impedance true time delay line using GaAs MMIC technology

Kim, Myunghoi

doi:10.1587/elex.13.20160463

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…Doing so leads to constructive interference by summing in-phase waves in the selected direction. Consequently, to operate phase array antennas over a wide band, a flat group delay in the frequency band, which is equivalent to a propagation, is required and is often referred as true-time delay [2,3]. The issues, for radar applications, for instance are compactness, insertion loss, bandwidth and delay value which must correspond, in the air, to the order of magnitude of the distance between the radiating elements.…”

Section: Introductionmentioning

confidence: 99%

Losses do not prevent wide band metamaterial true time delay line applications, GaAs MMIC experimental verification

Herbette

Géron

Dichi

et al. 2020

IET Microwaves, Antennas & Propagation

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Losses are often the impairing feature of metamaterial true time delay line devices. In this study, the authors analytically demonstrate that ohmics losses in this kind of structures as well as impedance mismatch depend on the bandwidth. These results allow to consider wide band application for radar systems. It is verified experimentally that metamaterial delay line devices are fitted for wide band delay line applications for they allow low insertion losses, low return loss and tunable delay.

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Section: Introductionmentioning

confidence: 99%

Losses do not prevent wide band metamaterial true time delay line applications, GaAs MMIC experimental verification

Herbette

Géron

Dichi

et al. 2020

IET Microwaves, Antennas & Propagation

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“…True-time delay lines (TTDL) and phase shifters are widely used in RF and microwave applications, especially in phased-array antennas and radars [1,2,3,4,5,6,7,8]. A simple transmission line could work as a fixed time delay line.…”

Section: Introductionmentioning

confidence: 99%

A novel tunable true-time delay line/phase shifter based on distributed Schottky structure

Pen

Huang

Wang

et al. 2019

IEICE Electron. Express

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True time delay lines and phase shifters are widely used in RF timed/phased array systems. Conventional delay lines and phase shifters often associate with reflection type circuits or distributed (periodically loaded) transmission lines. In this paper, we propose a new type of distributed circuit which composed of uniform transmission lines built on integrated Schottky active layer. A bi-functional chip is designed based on the new distributed structure. An Archimedean spiral topology is adopted to reduce the chip area. Theoretical analysis of the design method and circuit parameters is performed and a miniaturized prototype is implemented with p-HEMT technology to validate the design theory. Measurement results shows that this chip could work as either an areaefficient true-time delay line or a low-voltage phase shifter over the bandwidth 11-15 GHz. As an area-efficient true-time delay line, this chip provides 82.1 ps delay time per square millimeter when the biasing voltage fixed at −1.4 V. As a low-voltage phase shifter, this chip provides 26.43°p hase shift per volt when the biasing voltage sweeps form 0 V to −1.4 V.

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“…Various techniques including passive and active methods have been used to realize the TTDLs. Even if the MEMS-based (Micro-Electro-Mechanical System) TTDL and the photonic TTDL provide favorable delay performance, they are not suitable for integrated and low-cost systems due to the bulky size and complex process [4]. The active solutions based on RC or g m -C filters can be accomplished in a small chip area; however, it requires a calibration technique to improve the delay accuracy at low-GHz frequencies [5].…”

Section: Introductionmentioning

confidence: 99%

Electronic UWB tunable true-time delay line for timed array antennas

Yang

Bao

2018

IEICE Electron. Express

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This study presents a silicon-based ultra-wideband (UWB) truetime delay line for timed array antennas. The proposed circuit uses the novel active switches to mitigate performance deterioration from on-off switching. The proportional-to-absolute-temperature (PTAT) biasing circuit and scaling technique are adopted to improve the gain stability against the PVT variation at the different delay settings. The experimental prototype is fabricated in a 0.13 µm SiGe BiCMOS process, and exhibits a maximal relative delay of 35 ps with an average of 5 ps over a frequency range of 14-34 GHz. The chip occupies an area of 0.62 mm 2 , and the measured average input 1-dB compression point is 13 dBm.

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A stepped-impedance true time delay line using GaAs MMIC technology

Cited by 4 publications

References 10 publications

Losses do not prevent wide band metamaterial true time delay line applications, GaAs MMIC experimental verification

Losses do not prevent wide band metamaterial true time delay line applications, GaAs MMIC experimental verification

A novel tunable true-time delay line/phase shifter based on distributed Schottky structure

Electronic UWB tunable true-time delay line for timed array antennas

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