Abstract
Planar antenna reflectors are attractive for the designs of both narrow-beam antenna arrays and frequency-scanning arrays. Planar implementation of reflectors can be performed through substrate integrated waveguide (SIW) technology. The magnitude and argument of the field reflected from such surfaces depend on the angle of the incident field. Thus, the reflector’s profile should be synthesized considering the effect of spatial dispersion of the reflection coefficient to maximize the efficiency of the reflection. In this paper, we show how to synthesize a reflector’s profile that is characterized by the effect of spatial dispersion of the reflection coefficient. For this purpose, we use a spectral representation of the field reflected from a surface with spatial dispersion of the reflection coefficient. Specifically, we investigate a phase error for an SIW-based parabolic reflector. We show that offset SIW-based reflectors are mostly affected by the effect of spatial dispersion of the reflection coefficient.
Highlights
T HE DEVELOPMENT of modern telecommunication systems, for millimeter-wave frequency bands, has resulted in the miniaturization of antennas and microwave feeding networks
Let us synthesize the reflector’s profile for a practical case when a symmetric or an offset reflector is excited by a substrate integrated waveguide (SIW)
We derived a spectral representation of the field reflected from such surface, which is used for the synthesis procedure
Summary
T HE DEVELOPMENT of modern telecommunication systems, for millimeter-wave frequency bands, has resulted in the miniaturization of antennas and microwave feeding networks. The reflection properties of SIWbased surfaces generally depend on the angle of incidence of an incoming wave In this case, the effect of spatial dispersion of the reflection coefficient should be taken into account to increase the radiation efficiency of a planar antenna reflector. The design of an offset parabolic reflector [2], a Gregorian system [3], and a pillbox parabolic reflector [4]–[8] have been investigated None of those studies have taken the effect of spatial dispersion of the reflection coefficient into account; the reflectors’ profiles were chosen to be similar to that of a continuous metallic surface. An asymptotic representation of the Fourier integral-based reflection field is used in the synthesis procedure of a reflector profile
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