Title :
Loss-bandwidth product for frequency selective surfaces
Author :
Callaghan, Peter ; Parker, Edward A.
Author_Institution :
Electr. Eng. Labs., Kent Univ., Canterbury, UK
Abstract :
Measurements of the transmission/frequency responses of slot arrays embedded centrally in dielectric layers of various thicknesses show an inverse relationship between the 6 dB width of the transmission band and passband loss. For epsilon r=4.6, tan delta =0.02 the losses exceed 1 dB for bandwidths below about 25%. A computer model identifies absorption in the dielectric as the main source of the loss.
Keywords :
antenna theory; dielectric losses; dielectric-loaded antennas; microwave antenna arrays; waveguide antennas; computer model; dielectric absorption; dielectric layers; dipole slot array; frequency selective surfaces; loss bandwidth product; loss tangent; microwave antenna; passband loss; slot arrays; transmission bandwidth; transmission/frequency responses;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920228
