In this paper, a new miniaturized design of on-chip 4×4 Butler matrix implemented in SiGe BiCMOS technology is presented. The proposed Butler matrix was designed using two different approaches operating at the same frequency of 5.5 GHz. In a first example, a miniaturized lumped element design was implemented by increasing the density of the individual elements on the chip. A reduction of the chip area was achieved by simulating the entire structure with FEM based commercial software and by carefully evaluating mutual coupling effects. In a second design, a more innovative approach was taken into account by implementing the 90 degree hybrid through an on-chip transformer. Thanks to this solution, it was possible to achieve a considerable reduction of the chip area and an improvement of the Butler matrix performance both in terms of phase linearity and in terms of operating bandwidth. © 2015 EurAAP.

A BiCMOS 4×4 Butler matrix

BOCCIA, LUIGI;AMENDOLA, Gian Domenico
2015-01-01

Abstract

In this paper, a new miniaturized design of on-chip 4×4 Butler matrix implemented in SiGe BiCMOS technology is presented. The proposed Butler matrix was designed using two different approaches operating at the same frequency of 5.5 GHz. In a first example, a miniaturized lumped element design was implemented by increasing the density of the individual elements on the chip. A reduction of the chip area was achieved by simulating the entire structure with FEM based commercial software and by carefully evaluating mutual coupling effects. In a second design, a more innovative approach was taken into account by implementing the 90 degree hybrid through an on-chip transformer. Thanks to this solution, it was possible to achieve a considerable reduction of the chip area and an improvement of the Butler matrix performance both in terms of phase linearity and in terms of operating bandwidth. © 2015 EurAAP.
2015
978-88-907018-6-3
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/171834
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