scholarly journals True Time Delay Optical Beamforming Network Based on Hybrid InP-Silicon Nitride Integration

2021 ◽  
Author(s):  
Christos Tsokos ◽  
Efstathios Andrianopoulos ◽  
Adam Raptakis ◽  
Nikolaos Lyras ◽  
Lefteris Gounaridis ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Time Delay ◽  
Integrated Circuit ◽  
Dynamic Range ◽  
Noise Figure ◽  
External Cavity ◽  
External Cavity Laser ◽  
Photonic Integrated Circuit ◽  
True Time Delay ◽  
True Time

<div>We demonstrate a broadband and continuously tunable 1×4 optical beamforming network (OBFN), based on the hybrid integration of indium phosphide (InP) components in the silicon nitride (Si3N4) platform. The photonic integrated circuit (PIC) comprises a hybrid InP-Si3N4 external cavity laser, a pair of InP phase modulators, a Si3N4 optical single-sideband full carrier (SSBFC) filter followed by four tunable optical true time delay lines (OTTDLs), and four InP photodetectors. The performance of the OBFN-PIC is experimentally characterized by measuring the link gain, noise figure, and spurious free dynamic range of the microwave photonics links. Moreover, we assess its beamforming capabilities assuming that the OBFN-PIC is part of a wireless system operating in the downlink direction and feeds a multielement antenna array. Using microwave signals at 5 and 10 GHz with quadrature amplitude modulation (QAM) formats at 500 Mbaud, we evaluate the performance of the OBFN-PIC under various configurations. An error-free performance is achieved for all the experimental cases validating the potential of the proposed OBFN-PIC for high-quality beamforming performance. To our best of knowledge, this is the first thorough performance evaluation of a fully integrated OBFN-PIC.</div>

scholarly journals True Time Delay Optical Beamforming Network Based on Hybrid InP-Silicon Nitride Integration

2021 ◽  
Author(s):  
Christos Tsokos ◽  
Efstathios Andrianopoulos ◽  
Adam Raptakis ◽  
Nikolaos Lyras ◽  
Lefteris Gounaridis ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Time Delay ◽  
Integrated Circuit ◽  
Dynamic Range ◽  
Noise Figure ◽  
External Cavity ◽  
External Cavity Laser ◽  
Photonic Integrated Circuit ◽  
True Time Delay ◽  
True Time

<div>We demonstrate a broadband and continuously tunable 1×4 optical beamforming network (OBFN), based on the hybrid integration of indium phosphide (InP) components in the silicon nitride (Si3N4) platform. The photonic integrated circuit (PIC) comprises a hybrid InP-Si3N4 external cavity laser, a pair of InP phase modulators, a Si3N4 optical single-sideband full carrier (SSBFC) filter followed by four tunable optical true time delay lines (OTTDLs), and four InP photodetectors. The performance of the OBFN-PIC is experimentally characterized by measuring the link gain, noise figure, and spurious free dynamic range of the microwave photonics links. Moreover, we assess its beamforming capabilities assuming that the OBFN-PIC is part of a wireless system operating in the downlink direction and feeds a multielement antenna array. Using microwave signals at 5 and 10 GHz with quadrature amplitude modulation (QAM) formats at 500 Mbaud, we evaluate the performance of the OBFN-PIC under various configurations. An error-free performance is achieved for all the experimental cases validating the potential of the proposed OBFN-PIC for high-quality beamforming performance. To our best of knowledge, this is the first thorough performance evaluation of a fully integrated OBFN-PIC.</div>

scholarly journals True Time Delay Optical Beamforming Network Based on Hybrid InP-Silicon Nitride Integration

2021 ◽  
pp. 1-1
Author(s):  
Christos Tsokos ◽  
Efstathios Andrianopoulos ◽  
Adam Raptakis ◽  
Nikolaos Lyras ◽  
Lefteris Gounaridis ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Time Delay ◽  
True Time Delay ◽  
True Time

RF MEMS Extended Tuning Range Varactor and Varactor Based True Time Delay Line Design

PIERS Online ◽  
2008 ◽  
Vol 4 (4) ◽  
pp. 433-436 ◽  
Author(s):  
Yaping Liang ◽  
Calvin W. Domier ◽  
Neville C. Luhmann, Jr.
Keyword(s):  
Time Delay ◽  
Delay Line ◽  
Tuning Range ◽  
Rf Mems ◽  
True Time Delay ◽  
True Time ◽  
Line Design

A multi-octave microwave 6-bit true time delay with low amplitude and delay variation in 65 nm CMOS

2021 ◽  
pp. 1-10
Author(s):  
Yakov Gutkin ◽  
Asher Madjar ◽  
Emanuel Cohen
Keyword(s):  
Time Delay ◽  
Insertion Loss ◽  
Impedance Matching ◽  
Least Significant Bit ◽  
Delay Cell ◽  
True Time Delay ◽  
Unit Cells ◽  
True Time ◽  
And Performance ◽  
Low Amplitude

Abstract In this paper, we describe the design, layout, and performance of a 6-bit TTD (true time delay) chip operating over the entire band of 2–18 GHz. The 1.15 mm2 chip is implemented using TSMC foundry 65 nm technology. The least significant bit is 1 ps. The design is based on the concept of all-pass network with some modifications intended to reduce the number of unit cells. Thus, the first three bits are implemented in a single delay cell. A peaking buffer amplifier between bit 4 and bit 5 is used for impedance matching and partial compensation of the insertion loss slope. The rms delay error of the TTD is <1 ps over most of the frequency band and insertion loss is between 2.5 and 6.3 dB for all 64 states.

scholarly journals Programmable True Time Delay Lines Using Integrated Waveguide Meshes

2018 ◽  
Vol 36 (19) ◽  
pp. 4591-4601 ◽  
Author(s):  
Daniel Perez-Lopez ◽  
Erica Sanchez ◽  
Jose Capmany
Keyword(s):  
Time Delay ◽  
Delay Lines ◽  
True Time Delay ◽  
True Time

Continuous photonic microwave true-time delay using a side-polished fiber Bragg grating with heating electrode

2004 ◽  
Vol 44 (1) ◽  
pp. 35-37 ◽  
Author(s):  
Sang-Shin Lee ◽  
Ho-Dong Chae ◽  
Do-Hwan Kim ◽  
Hyung-Joon Kim ◽  
Kwang-Taek Kim
Keyword(s):  
Time Delay ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
True Time Delay ◽  
True Time ◽  
Side Polished Fiber
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