| 摘要 |
The present invention relates to an antenna apparatus for high frequency applications, essentially composed of feed antenna (15) and reflector (16) or lens (19) consisting of a frequency scanned grating which reflects or transmits the incident electromagnetic field into a diffracted field consisting of the first order diffracted grating-lobe, where the shape of curvature of the reflector or the lens is not directly determined by desired radiation characteristics but can be chosen to obtain other benefits. The invention is characterized in that the frequency scanned grating has a quasi-periodic lattice geometry, where the quasi-periodic lattice geometry essentially determines the radiation pattern of the reflected or transmitted diffracted field from the grating and thereby is essentially determinant for the radiation pattern and the radiation properties of the antenna apparatus. |
