A Wideband GAAS 6-Bit True-Time Delay MMIC Employing On-Chip Digital Drivers

This paper describes a 2-20 GHz 6-bit True-Time Delay. A total equivalent electrical length in air of 43.5 mm (145 ps) is achieved over a 2-20 GHz bandwidth. Digital drivers and a serial-to-parallel converter are integrated on the same MMIC. The ED02AH 0.2 μm PHEMT process from OMMIC is used. The ti...

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Bibliographic Details
Published in2000 30th European Microwave Conference pp. 1 - 4
Main Authors Willms, John G., Ouacha, Aziz, de Boer, Lex, van Vliet, Frank E.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2000
Subjects
Antenna arrays
Aperture antennas
Broadband antennas
Delay effects
Gallium arsenide
Linear antenna arrays
MMICs
Phased arrays
Radar antennas
Wideband
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Summary:This paper describes a 2-20 GHz 6-bit True-Time Delay. A total equivalent electrical length in air of 43.5 mm (145 ps) is achieved over a 2-20 GHz bandwidth. Digital drivers and a serial-to-parallel converter are integrated on the same MMIC. The ED02AH 0.2 μm PHEMT process from OMMIC is used. The time delay elements are realised using constant-R networks. The three smallest bits make use of a self-switched version of the constant-R networks while the 3 largest bits use a topology with single-pole double-throw (SPDT) switches and constant-R networks in the delay path. Measurement results for a typical chip are presented.
DOI:10.1109/EUMA.2000.338753