Title :
A Third-Order Bandpass Frequency Selective Surface With a Tunable Transmission Null
Author :
Li, Meng ; Behdad, Nader
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Wisconsin-Madison, Madison, WI, USA
fDate :
4/1/2012 12:00:00 AM
Abstract :
We present the design and analysis of a frequency selective surface (FSS) capable of providing a third-order bandpass response. The transfer function of the proposed FSS has a transmission null, the frequency of which can be tuned to suppress strong interference signals with frequencies close to or within the main transmission band. The principles of operation of the device are presented along with an approximate analytical procedure for synthesizing the desired FSS response. Two prototypes are fabricated and characterized using a free-space measurement setup and the FSS´s different modes of operation are experimentally demonstrated. Finally, the tuning performance of the FSS´s transmission null is experimentally demonstrated in a WR-90 waveguide environment.
Keywords :
band-pass filters; circuit tuning; frequency selective surfaces; interference (signal); periodic structures; spatial filters; transfer functions; waveguide antennas; FSS transmission null; WR-90 waveguide environment; free-space measurement setup; interference signal; periodic structure; spatial filter; third-order bandpass frequency selective surface; third-order bandpass response; transfer function; transmission band; tunable transmission null; tuning performance; Frequency selective surfaces; Integrated circuit modeling; Loss measurement; Prototypes; Resonant frequency; Spirals; Substrates; Frequency selective surfaces; periodic structures; radomes; spatial filters;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2186251
