초록 ▼

A bandpass radome that reduces the number of spurious resonances, and that tends to suppress Transverse Magnetic TM and Transverse Electric TE surface waves, is described. In one embodiment, the radome includes an inductive FSS ground plane layer. First and second capacitive FSS layers are disposed

A bandpass radome that reduces the number of spurious resonances, and that tends to suppress Transverse Magnetic TM and Transverse Electric TE surface waves, is described. In one embodiment, the radome includes an inductive FSS ground plane layer. First and second capacitive FSS layers are disposed above the inductive ground plane layer. Third and fourth capacitive FSS layers are disposed below the inductive ground plane layer. In one embodiment, the capacitive FSS layers use patch elements and some or all of the FSS patch elements above and below the inductive ground plane layer are electrically connected to the inductive ground plane layer by a conducting posts. The conducting posts form a rodded medium to suppress TM and TE surface waves. In one embodiment the total thickness of the bandpass radome is less than .lambda./20 at the center frequency of the passband.

대표청구항 ▼

1. An electrically thin bandpass radome that exhibits a reduced number of spurious resonances, comprising:a slotted FSS ground plane layer; a first FSS patch layer disposed above said slotted FSS ground plane layer, said first FSS patch layer comprising a first plurality of patch elements; a second

1. An electrically thin bandpass radome that exhibits a reduced number of spurious resonances, comprising:a slotted FSS ground plane layer; a first FSS patch layer disposed above said slotted FSS ground plane layer, said first FSS patch layer comprising a first plurality of patch elements; a second FSS patch layer disposed above said slotted FSS ground plane layer and below said first FSS patch layer, said second FSS patch layer comprising a second plurality of patch elements; a third FSS patch layer disposed below said slotted FSS ground plane layer, said third FSS patch layer comprising a third plurality of patch elements; a fourth FSS patch layer disposed below said third FSS patch layer, said fourth FSS patch layer comprising a fourth plurality of patch elements; a first plurality of conducting posts connecting said first plurality of patch elements to said ground plane; a second plurality of conducting posts connecting said second plurality of patch elements to said ground plane; a third plurality of conducting posts connecting said third plurality of patch elements to said ground plane; and a fourth plurality of conducting posts connecting said fourth plurality of patch elements to said ground plane.