Open AccessW‐band out‐of‐phase active power divider with continuously tunable power division ratio and invariant phase difference
Author(s) -
Dong Haoyi,
Chen Jixin,
Hou Debin
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.3165
Subject(s) - current divider , balun , frequency divider , variable gain amplifier , cascode , wilkinson power divider , amplifier , electrical engineering , power dividers and directional couplers , video graphics array , electronic engineering , engineering , cmos , operational amplifier , antenna (radio)
In this study, a W‐band out‐of‐phase active power divider, with continuously tunable power division ratio, has been presented. Out‐of‐phase signal is generated by the compact transform balun with accurate phase and amplitude response. To stabilise the phase difference in different power division ratio, phase‐invariant cascode variable gain amplifier (VGA) is designed in the two paths of the active power divider and 4‐bits proportional to absolute temperature current source is designed to control voltage of VGA. The active power divider is implemented in SiGe BiCMOS process with measured tunable power division ratio from 1:16 up to 16:1, the phase shift from 74 to 90 GHz is about 10° as the gain changes up to 12 dB, which guarantees a good phase‐invariant performance.