Spatial Filters for Wireless Communication
(Room 204)
18 Oct 18
3:20 PM
-
3:50 PM
Resonant frequency stability has been an issue for both bandstop and bandpass spatial filters to perform over varying incident angles and polarizations. In this paper, the resonant frequency stability in a bandstop filter over varying incident angles and polarizations is demonstrated by the miniature fractal patch element FSS. In addition, to meet the wide passband demand in 5G wireless communication systems, a fractal slot element FSS is designed to exhibit more than 30 percent bandwidth with an insertion loss less than 0.5 dB. The proposed FSS filters retain constant bandwidth characteristics as the incident angle increases up to 60 degrees for both the TE and TM polarizations. The design and analyses of the patch and slot FSS filters are based on the accurate integral equation formulation (IEF) combined with the method of moments (MOM). This analytical approach is also known as the full wave analysis technique. Finally, a low-volume and light-weight proof-of-concept waveguide test sample is fabricated and tested. Its measured S-parameter results are used to validate the predicted filter performances.