一种UV频段数控延时器设计与实现

Design and Implementation of a UV Band Digital Time Delay Device

摘要

针对UV频段110~520MHz超短波阵列高精度时延调控需求，本文采用低通LC集总参数滤波拓扑结构，研制一款5位二进制加权LC数控延时器，采用开关选择式多级梯形LC延时单元架构。最小延时步进44 ps，5位档位延时依次为44 ps、88 ps、176 ps、352 ps、704 ps，最大总延时1364 ps，搭配SPDT射频开关实现延时/直通支路切换。该器件结构紧凑、延时步进均匀、宽带稳定性优异，可满足低空探测雷达、超短波宽带通信相控阵无色散波束扫描需求。

Abstract

Aiming at the high-precision time delay regulation requirement of ultra-short wave arrays in the UV band of 110~520 MHz, this paper develops a 5-bit binary-weighted LC digital delay device adopting the low-pass LC lumped parameter filter topology and the switch-selected multi-stage ladder LC delay unit architecture. The minimum delay step is 44 ps, and the delay values of the 5-bit gears are 44 ps, 88 ps, 176 ps, 352 ps and 704 ps respectively, with a maximum total delay of 1364 ps. SPDT RF switches are configured to realize the switching between delay and through branches. The device features compact structure, uniform delay steps and excellent broadband stability, which can meet the requirements of dispersion-free beam scanning for low-altitude detection radar and ultra-short wave broadband communication phased arrays.

关键词

UV / LC集总参数 / 梯形延时单元 / 宽带通信

Key words

UV band / LC lumped parameter / ladder delay unit / broadband communication

参考文献

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