Differential planar aperture antenna
AssigneeCity University of Hong Kong
InventorsQuan XUE, Shaowei LIAO, Peng WU
Life of this patent
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Abstract
A planar differential aperture antenna that has a high gain and wide bandwidth at a millimeter wave band is provided. The differential aperture antenna has a cavity within it that has a height of roughly a quarter of a wavelength of the desired transmission band. The cavity is H-shaped, and has a cross shaped patch within the cavity that is fed differentially by two grounded coplanar waveguides. Two ends of the patch extend towards the ports on either side of the differential aperture antenna, and the other two ends of the patch extend into the cavity lobes, perpendicular with respect to the ports.
Claims20
A differential aperture antenna, comprising:
- a pair of grounded coplanar waveguides;
- a first port formed between a first set of ends of the pair of grounded coplanar waveguides and a second port formed between a second set of ends of the pair of grounded coplanar waveguides;
- a cavity formed between the pair of grounded coplanar waveguides, a ground surface, and a surface metal strip, wherein the cavity comprises lobes, wherein the lobes are substantially symmetric across an axis between the first port and the second port;
- and
- a patch that extends into the lobes and into the first port and the second port, wherein the patch is symmetric across the first axis and across a second axis between respective ends of the lobes.
The differential aperture antenna of claim 10, wherein the substrate is around 0.787 mm.
A method, comprising:
- receiving, by an apparatus, a transmission at a first port formed between two waveguides;
- coupling the transmission to a patch that is across an opening of the first port from a ground plane;
- guiding the transmission as a surface wave along the patch to a cavity and splitting the transmission into two parts and guiding the two parts to respective ends of the patch that extend into openings of the cavity;
- and
- exciting a uniform aperture field distribution in the cavity based on the two parts of the transmission.
A method for fabricating a differential aperture antenna, comprising:
- forming a pair of grounded coplanar waveguides that have two ports between respective ends of the grounded coplanar waveguides;
- forming a cavity between a ground surface and a surface metal strip, wherein the cavity comprises two lobes, wherein the two lobes are symmetric across an axis between the first port and the second port;
- and
- forming a metal patch in the cavity opposite a ground plane, wherein the patch is cross shaped and extends into the two lobes and the two ports.
Dependencies are inferred from the claim text.