| 摘要 |
A high performance multi-band antenna reflector having low sidelobe and cross polarization levels, and a superior carrier-to-interference ratio has two concentric zones (12, 14 in a first embodiment and 102, 104 in a second embodiment). In the first embodiment, the outer concentric zone (14) is a frequency selective absorber (20) made of a metallic pattern (22) dimensioned to reflect signals in one frequency band and absorb signals in a second frequency band. In the second embodiment, the outer concentric zone (104) is a frequency selective surface (106) that reflects signals in one frequency band and passes signals in a second frequency bands. Resistance cards (122) overlay the top and bottom sides of the junction between the frequency selective surface (106) and a reflective layer (110) on an inner surface (112) of the central concentric zone (102).
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