Variable delay line for phased-array antenna based on a chirped fiber grating

Ortega, B.; Cruz, J.L.; Capmany, J.; Andrés, Miguel V.; Pastor, D.

doi:10.1109/22.859480

Cited by 98 publications

(53 citation statements)

References 13 publications

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“…The techniques other than these are based on optical phase shifters [9], switchable delay matrices [10][11][12][13][14], liquid crystal polarization switching devices [15], a combination of a wavelength-tunable laser and a dispersive optical element, such as a high dispersion fiber [16,17], a fiber optic prism [18,19], a fiber Bragg gratings (FBGs) prism [20][21][22], or chirped FBGs [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Photonic True-Time Delay for Phased-Array Antenna System using Dispersion Compensating Module and a Multiwavelength Fiber Laser

Jeon¹,

Lee²

2014

Journal of the Optical Society of Korea

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An optical true-time delay beam-forming system using a tunable dispersion compensating module (DCM) for dense-wavelength division modulation (DWDM) and a multiwavelength fiber ring laser for a phased array antenna is proposed. The multiwavelength fiber ring laser has one output that includes four wavelengths; and four outputs that include only single-wavelength. The advantage of such a multiwavelength fiber ring laser is that it minimizes the number of devices in the phased array antenna system. The time delays according to wavelengths, which are assigned for each antenna element, are obtained from the tunable DCM. The tunable DCM based on a temperature adjustable Fabry-Perot etalon is used. As an experimental result, a DCM could be used to obtain the change of the beam angle by adjusting the dispersion value of the DCM at the fixed lasing wavelengths of the fiber ring laser in the proposed optical true-time delay.

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Section: Introductionmentioning

confidence: 99%

Photonic True-Time Delay for Phased-Array Antenna System using Dispersion Compensating Module and a Multiwavelength Fiber Laser

Jeon¹,

Lee²

2014

Journal of the Optical Society of Korea

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“…In the last decade, there has been growing interest in the employment of photonic true time delay techniques for the beamsteering of phased array systems in light of the squint free wideband capability they offer along with the classical advantages of photonic technology. Many kinds of photonic TTD lines have been proposed involving either path switching [2,3] or dispersive techniques [4][5][6]. The techniques relying on path switching principle, even if typically present high time delay precision and stability, provide only discrete time delay increments.…”

Section: Introductionmentioning

confidence: 99%

“…Inversely, the employment of dispersive elements, together with tuning capability, allows to achieve continuous beamsteering and multiband operation. In many proposals, Linearly Chirped Fiber Bragg Gratings (LCFBG) have been used as dispersive element and continuous time delays have been obtained by tuning the wavelengths of different laser sources [4,5] or by tuning mechanically the grating features [6]. Nevertheless, the employment of a single wavelength laser source and the lack of moving mechanical elements would be the best solution in terms of robustness, reduction of costs and system complexity.…”

Section: Introductionmentioning

confidence: 99%

Improved Photonic True Time Delay Unit for a Ku-Band Phased Array Antenna Demonstration

Pisco¹,

Spirito²,

Cutolo³

et al. 2008

TOOPTSJ

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Abstract:In this letter, a Photonic True Time Delay (PTTD) unit for phased array antennas is experimentally demonstrated. The PTTD unit, employing a single wavelength laser source, exploits the distributed photonic bandgap offered by a Linearly Chirped Fiber Bragg Grating (LCFBG) to attain different time delays by properly actuating the physical and geometrical features of the LCFBG through temperature changes. The time delay response of the TTD unit has been measured experimentally revealing multiband operation capability (S, C, X and Ku bands) with ps time delay resolution and a maximum dynamic range of 250ps. The time steering demonstration has been performed by characterizing in the Ku band an array prototype within a Near Field range.

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“…While in case of an optically controlled analog beam former network same is done using chirped fiber grating with the help of variable optical delay lines [16]. However, this leads to increase in multiple interconnects.…”

Section: Introductionmentioning

confidence: 99%

Microwave photonic network for active electronically scanned array radar

Mathur

Sridhar

2016

Int. J. Microw. Wireless Technol.

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Active electronically scanned array (AESA) radar has large number of transmit/Receive (T/R) modules which require multiple microwave and digital signals. Distribution of these signals through conventional method such as coaxial cable, twisted pair, etc. not only introduces engineering complexities and signal loss but also have limitation of bandwidth, data rate, transmission distance, etc. This paper addresses design and implementation of microwave photonic network for distribution of microwave and digital signals over single optical fiber using wavelength division multiplexing for AESA radars. The design challenge is to limit the variation in output radio frequency power within +1 dB over full operational band of radar from 2 to 4 GHz and functionality under hostile military environment. Optical amplifiers have been used in all channels to stabilize optical output independent of wavelength with automatic light control. The optical signal is split into 64 identical parts to feed multiplexed signal into different digital receivers physically spread across the antenna array. It is an additional challenge to normalize performance as all 64 receivers show variation in output in spite of identical electronic circuitry. Experimental results validate the feasibility of microwave photonic network for wide branching distribution of multiple microwave and digital signals for AESA radar.

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Variable delay line for phased-array antenna based on a chirped fiber grating

Cited by 98 publications

References 13 publications

Photonic True-Time Delay for Phased-Array Antenna System using Dispersion Compensating Module and a Multiwavelength Fiber Laser

Photonic True-Time Delay for Phased-Array Antenna System using Dispersion Compensating Module and a Multiwavelength Fiber Laser

Improved Photonic True Time Delay Unit for a Ku-Band Phased Array Antenna Demonstration

Microwave photonic network for active electronically scanned array radar

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