Transmissionsegenskaper av material i frekvensområdet 2-110 GHz och möjligheter att "se igenom"
Publish date: 2005-01-01
Report number: FOI-R--1861--SE
Written in: Swedish
The report presents a work included in the project "Technical evaluation of new sensor abilities to urban warfare" which concerns experimental mapping of transmission properties of different materials in the frequency range 2-110 GHz. Materials which were examined in this project were packaging, clothing and building materials. In this report, an investigation of how transmission properties are changed depending on degree of moisture in the material is also presented. This investigation is based on transmission measurements through leather. An analysis of the measurement results shows that lower frequencies are suitable to get efficient penetration through building materials. Really low frequencies are suitable for efficient penetration through outer walls and somewhat higher frequencies for efficient penetration through inner walls. Penetration through packaging and clothing materials is high even at higher frequencies. Higher degree of moisture in the material brings lower transmission.