Open AccessBroadband inductorless vector modulator IC for localisation and communication systems
Author(s) -
Wagner J.,
Joram N.,
Wolf R.,
Ellinger F.
Publication year - 2015
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.2015.0343
Subject(s) - amplitude , broadband , bicmos , electronic engineering , electrical engineering , integrated circuit , converters , phase (matter) , computer science , physics , engineering , telecommunications , optics , transistor , voltage , quantum mechanics
An inductorless vector modulator‐based radio frequency (RF) weighting circuit working from 1 to 10 GHz is presented. Amplitude and phase interdependencies were strongly reduced employing optimised attenuators. The vector modulator features a 360° phase and more than 40 dB amplitude control range with a root mean square phase and amplitude error of only 6° and 0.16 dB, respectively. These features make it a suitable candidate for communication and localisation diversity frontends in the 2.4 and the 5.9 GHz industrial, scientific and medical (ISM) bands. The circuit was fabricated in a 180 nm BiCMOS technology and contains an inter‐integrated circuit (I 2 C) control interface and digital‐to‐analogue converters. It consumes 87 mW and requires an area of only ≃0.2 mm 2 .