Glass characterization for designing frequency selective surfaces to improve transmission through energy saving glass windows

Ghaffer I. Kiani, Anders Karlsson, Lars Olsson, Karu P. Esselle

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

34 Citations (Scopus)
61 Downloads (Pure)


This paper reports initial work on creating frequency selective surfaces (FSS) on modern day glass windows to improve the transmission of wireless/mobile/cellular communication signals through the glass. The manufacturers of these glass windows apply very thin layers of metallic oxides on one side of glass to provide extra thermal insulation. These coatings block the infrared and ultraviolet waves to provide thermal insulation, but they also attenuate communication signlas such as GSM 900, GSM 1800/1900, UMTS and 3G mobile signals. This creates a major communication problem when buildings are constructed using mostly such type of glass. A bandpass FSS can provide a solution to increase the transmission of useful bands through the coated glass. In order to design an appropriate FSS, the relative permittivity and conductivity of glass should be measured accurately. Moreover, electrical properties of the coated layer must also be known in order to obtain a resonance in the desired band. In this work, we used two different methods of measuring the permittivity and conductivity of glass. Electrical properties of one of the common glass windows (Optitherm™ SN) are presented. Simulations of Optitherm glass shows about 35 dB transmission loss over 900 - 2200 MHz frequency band.

Original languageEnglish
Title of host publication2007 Asia-Pacific Microwave Conference, APMC
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
ISBN (Print)1424407494, 9781424407491
Publication statusPublished - 2007
EventAsia-Pacific Microwave Conference, APMC 2007 - Bangkok, Thailand
Duration: 11 Dec 200714 Dec 2007


OtherAsia-Pacific Microwave Conference, APMC 2007

Bibliographical note

Copyright 2007 IEEE. Reprinted from Proceedings of Asia-Pacific Microwave Conference 2007. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Macquarie University’s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.


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