Open AccessA Six Bit Silicon Nitride Optical True Time Delay Line for Ka-Band Phased Array Antenna
Author(s) -
Huimin Yang,
Binfeng Yun
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1634/1/012173
Subject(s) - true time delay , phased array , group delay and phase delay , waveguide , optics , ka band , materials science , optoelectronics , microwave , silicon nitride , optical switch , bandwidth (computing) , antenna (radio) , silicon , physics , electronic engineering , computer science , telecommunications , engineering
A six-bit optical true time delay unit with a delay tuning increment of 1.42 ps was designed and fabricated on silicon nitride platform, which can be utilized in Ka-band phased array antenna systems. The delay unit consists of seven thermo-optical switches and six waveguide delay lines with different lengths. By changing the states of the thermo-optical switches, 64 stages of discrete time delays varying from 0 to 89.6 ps has been obtained. In addition, as the waveguide delay independence on the modulation frequency, so the designed silicon nitride delay unit can be applied in microwave applications with broader bandwidth.