Apparatus and method for antenna RF feed
First Claim
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1. An RF feed comprising:
- a parallel plate waveguide comprising a top plate, a bottom plate, and a side wall defining a cavity, wherein the sidewall comprises an opening serving as an excitation port and wherein the top plate and bottom plate are made of metal or a material coated with metal;
a curved reflector situated outside the cavity and coupled to the excitation port, the reflector configured to excite at the excitation port a planar electromagnetic wave in near field regime, such that the planar wave propagates within the waveguide; and
a radiation source provided in the space between the excitation port and the curved reflector and radiating towards the curved reflector.
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Abstract
An RF feed is provided which is structured as a curved reflector coupled to a sidewall of a waveguide cavity. A radiation source is situated facing the curved reflector. The RF feed may be coupled to a waveguide cavity having radiation elements coupled to top surface thereof, to thereby feed an antenna array. When an antenna array is used, several curved reflector RF feeds may be used, operating in the same or different frequencies.
33 Citations
20 Claims
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1. An RF feed comprising:
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a parallel plate waveguide comprising a top plate, a bottom plate, and a side wall defining a cavity, wherein the sidewall comprises an opening serving as an excitation port and wherein the top plate and bottom plate are made of metal or a material coated with metal; a curved reflector situated outside the cavity and coupled to the excitation port, the reflector configured to excite at the excitation port a planar electromagnetic wave in near field regime, such that the planar wave propagates within the waveguide; and a radiation source provided in the space between the excitation port and the curved reflector and radiating towards the curved reflector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification