Ring resonator-based broadband photonic beam former for phased array antennas

Zhuang, Leimeng

doi:10.3990/1.9789036530781

Cited by 11 publications

(12 citation statements)

References 52 publications

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“…4 it can be noticed that the suppression in the OSBF stopbands varies across frequency. This can be attributed to the group index change in the bends of the ORR included in one of the interferometer arms of the filter [15,16]. Nonetheless, the tunability of the OSBF allowed to reconfigure the response in such a way to obtain maximum suppression over the undesired stopband, that is, between 10.7 GHz and 12.75 GHz below the carrier frequency (Fig.…”

Section: A Filter Response and Wavelength Settings For Ossb-fc Operamentioning

confidence: 93%

CMOS-compatible integrated optical delay line for broadband K<inf>u</inf>-band satellite communications

Burla

Marpaung

Zhuang

et al. 2012

2012 IEEE International Topical Meeting on Microwave Photonics

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We present the first demonstration of a broadband and continuously tunable integrated optical true-time-delay line, operating over the complete DVB-S satellite communication band, realized with a CMOS-compatible TriPleX TM waveguide technology. The integrated optical chip includes a delay line and an optical sideband filter (OSBF) based on reconfigurable optical ring resonators (ORR). The filter and the delay responses are software programmable and have been configured for K u -band operation. For the first time, the continuous tunability between 0 and 277 ps is demonstrated over the complete for DVB-S satellite communication band (10.7-12.75 GHz).

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Section: A Filter Response and Wavelength Settings For Ossb-fc Operamentioning

confidence: 93%

CMOS-compatible integrated optical delay line for broadband K<inf>u</inf>-band satellite communications

Burla

Marpaung

Zhuang

et al. 2012

2012 IEEE International Topical Meeting on Microwave Photonics

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“…In this paper we look at an automatic tuning procedure for one branch of the OBFN subsystem. The traditional approach to automatically tune one branch of the photonic beamformer is to use a nonlinear optimization algorithm that minimizes a performance metric [4,Sec. 6].…”

Section: A Automatic Tuning Methodsmentioning

confidence: 99%

Automatic Delay Tuning of a Novel Ring Resonator-Based Photonic Beamformer for a Transmit Phased Array Antenna

Bliek

Wahls

Visscher

et al. 2019

J. Lightwave Technol.

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We present a novel photonic beamformer for a fully integrated transmit phased array antenna, together with an automatic procedure for tuning the delays in this system. Such an automatic tuning procedure is required because the large number of actuators makes manual tuning practically impossible. The antenna system is designed for the purpose of broadband aircraft-satellite communication in the Ku-band to provide satellite Internet connections on board the aircraft. The goal of the beamformer is to automatically steer the transmit antenna electronically in the direction of the satellite. This is done using a mix of phase shifters and tunable optical delay lines, which are all integrated on a chip and laid out in a tree structure. The Ku-band has a bandwidth of 0.5 GHz. We show how an optical delay line is automatically configured over this bandwidth, providing a delay of approximately 0.4 ns. The tuning algorithm calculates the best actuator voltages based on past measurements. This is the first time that such an automatic tuning scheme is used on a photonic beamformer for this type of transmit phased array antenna. We show that the proposed method is able to provide accurate beamforming (< 11.25 • phase error over the whole bandwidth) for two different delay settings.Index Terms-microwave photonics, photonic beamforming, phased array antenna, automatic beamformer tuning Corresponding author: l.bliek@tudelft.nl.L. Bliek, S. Wahls and M. Verhaegen are with the

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“…An OBFN simulation based on the same physical models as in [28] will be used in this section, with the following differences: 1) the implementation is done in C++; 2) ORR properties are equal for each ORR; 3) heater voltages with offset and crosstalk [27,Appendix B] have been implemented; 4) a small region outside the bandwidth of interest has a desired group delay of 0; 5) an 8 × 1 OBFN with 12 ORRs is considered; 6) the standard deviation of the measurement noise was set to 7.5 · 10 −3 . The input of the simulation is the normalized heater voltage for each ORR, and the output is the corresponding mean square error of the difference between OBFN path group delays and desired delays.…”

Section: Tuning Of An Optical Beam-forming Networkmentioning

confidence: 99%

Online Optimization With Costly and Noisy Measurements Using Random Fourier Expansions

Bliek

Verstraete

Verhaegen

et al. 2018

IEEE Trans. Neural Netw. Learning Syst.

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Abstract-This paper analyzes DONE, an online optimization algorithm that iteratively minimizes an unknown function based on costly and noisy measurements. The algorithm maintains a surrogate of the unknown function in the form of a random Fourier expansion (RFE). The surrogate is updated whenever a new measurement is available, and then used to determine the next measurement point. The algorithm is comparable to Bayesian optimization algorithms, but its computational complexity per iteration does not depend on the number of measurements. We derive several theoretical results that provide insight on how the hyper-parameters of the algorithm should be chosen. The algorithm is compared to a Bayesian optimization algorithm for an analytic benchmark problem and three applications, namely, optical coherence tomography, optical beam-forming network tuning, and robot arm control. It is found that the DONE algorithm is significantly faster than Bayesian optimization in the discussed problems, while achieving a similar or better performance.

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Ring resonator-based broadband photonic beam former for phased array antennas

Cited by 11 publications

References 52 publications

CMOS-compatible integrated optical delay line for broadband K<inf>u</inf>-band satellite communications

CMOS-compatible integrated optical delay line for broadband K<inf>u</inf>-band satellite communications

Automatic Delay Tuning of a Novel Ring Resonator-Based Photonic Beamformer for a Transmit Phased Array Antenna

Online Optimization With Costly and Noisy Measurements Using Random Fourier Expansions

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