A 60 GHz Image Rejection Filter Manufactured Using a High Resolution LTCC Screen Printing Process

Isabel Ferrer
Swedish Defence Research Agency, Dept. of Microwave Technology, Sweden

Jan Svedin
Swedish Defence Research Agency, Dept. of Microwave Technology, Sweden

Ladda ner artikelhttp://www.ep.liu.se/ecp_article/index.en.aspx?issue=008;article=064

Ingår i: GigaHertz 2003. Proceedings from the Seventh Symposium

Linköping Electronic Conference Proceedings 8:64, s.

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Publicerad: 2003-11-06


ISSN: 1650-3686 (tryckt), 1650-3740 (online)


An LTCC test panel including various mm-wave test circuits has been designed and manufactured using a recently developed screen printing process (Thales Microelectronics) having a highly optimised resolution; here evaluated using a minimum microstrip line width/ gap of 2 mil (50.8 µm). In this paper we report on a 60 GHz microstrip coupled lines bandpass filter manufactured on a 3.7 mil (94.0 µm) thick Ferro A6S substrate using a minimum line gap of 2 mil. The electromagnetic effects caused by the top conductor recess were taken into account using direct full-wave simulations (Ansoft HFSS) but also by a circuit simulation methodology based on the use of effective relative permittivity and substrate height parameters [1]. Preliminary measurement results show a 3 dB bandwidth of approximately 5 GHz; a passband insertion loss of 4 dB and a center frequency slightly above the simulated value. This bandpass filter could e.g. serve as an image rejection filter together with the 60 GHz WLAN chipset [2] where it would demonstrate a 55 GHz image suppression of approximately 20 dB


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[1] R. Kulke; W. Simon; A. Lauer et al; “Investigation of Ring-Resonators on Multilayer LTCC; International ´Microwave Symposium Workshops and Short Courses; WMD-09; Phoenix; Az.; 20-25 May 2001.

[2] C. Fager; M. Hasselblad; R. Kozhuharov; L. Landén; T. Masuda; and; H. Zirath; ”A Front-end Chipset for a 60 GHz Radio Transceiver”; Proc. Of 2001 GigaHertz Symposium; 26-27 Nov; Lund; Sweden.

[3] http://www.ferro.com

[4] http://www.thales-microelectronics.com

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