A radio frequency (RF) antenna including a patch antenna element, a microstrip transmission line, a ground plane, a waveguide, and a dielectric lens. The patch antenna element is disposed on a top surface of a first substrate of the RF antenna, and includes a slot aperture through which the patch antenna element is configured to be electromagnetically coupled to the microstrip transmission line. The microstrip transmission line is disposed between the first substrate and a second substrate. The ground plane is disposed on a third substrate. The microstrip transmission line is configured to be electromagnetically coupled to the ground plane. The waveguide includes a proximal aperture attached to the top surface and enclosing the patch antenna element. The waveguide includes a distal aperture opposite the proximal aperture, and the waveguide is configured to be electromagnetically coupled to the patch antenna element. The dielectric lens is disposed in the distal aperture.

A radio frequency (RF) antenna including a patch antenna element, a microstrip transmission line, a ground plane, a waveguide, and a dielectric lens. The patch antenna element is disposed on a top surface of a first substrate of the RF antenna, and includes a slot aperture through which the patch antenna element is configured to be electromagnetically coupled to the microstrip transmission line. The microstrip transmission line is disposed between the first substrate and a second substrate. The ground plane is disposed on a third substrate. The microstrip transmission line is configured to be electromagnetically coupled to the ground plane. The waveguide includes a proximal aperture attached to the top surface and enclosing the patch antenna element. The waveguide includes a distal aperture opposite the proximal aperture, and the waveguide is configured to be electromagnetically coupled to the patch antenna element. The dielectric lens is disposed in the distal aperture.

An aperture feed network includes a substrate having a first surface and a parallel second surface, first and second conductive traces on the first surface of the substrate, a third conductive trace on the second surface of the substrate, a conductive via extending through a thickness of the substrate, and one or more ground plane structures on the second surface of the substrate. The substrate comprises a dielectric material. The first and second conductive traces together form a differential signal line. The third conductive trace comprises a first branch and a second branch. The conductive via contacts the first branch of the third conductive trace on the second surface of the substrate and the second conductive trace on the first surface of the substrate. The one or more ground plane structures have irregular shapes.

An antenna device includes an antenna unit and reflecting units. The antenna unit is arranged on a substrate. The reflecting units are arranged separately from each other on the substrate and surrounding the antenna unit. The reflecting units are configured to adjust a radiation pattern of the antenna unit, and each of the reflecting units includes a first portion and a second portion. The first portion has an upper side and a lower side, and the lower side of the first portion is coupled to the substrate. The second portion has a lower side connected to the upper side of the first portion. A width of the lower side of the first portion is smaller than a width of the lower side of the second portion.

A radio frequency (RF) antenna including a patch antenna element, a microstrip transmission line, a ground plane, a waveguide, and a dielectric lens. The patch antenna element is disposed on a top surface of a first substrate of the RF antenna, and includes a slot aperture through which the patch antenna element is configured to be electromagnetically coupled to the microstrip transmission line. The microstrip transmission line is disposed between the first substrate and a second substrate. The ground plane is disposed on a third substrate. The microstrip transmission line is configured to be electromagnetically coupled to the ground plane. The waveguide includes a proximal aperture attached to the top surface and enclosing the patch antenna element. The waveguide includes a distal aperture opposite the proximal aperture, and the waveguide is configured to be electromagnetically coupled to the patch antenna element. The dielectric lens is disposed in the distal aperture.

A radio frequency (RF) antenna including a patch antenna element, a microstrip transmission line, a ground plane, a waveguide, and a dielectric lens. The patch antenna element is disposed on a top surface of a first substrate of the RF antenna, and includes a slot aperture through which the patch antenna element is configured to be electromagnetically coupled to the microstrip transmission line. The microstrip transmission line is disposed between the first substrate and a second substrate. The ground plane is disposed on a third substrate. The microstrip transmission line is configured to be electromagnetically coupled to the ground plane. The waveguide includes a proximal aperture attached to the top surface and enclosing the patch antenna element. The waveguide includes a distal aperture opposite the proximal aperture, and the waveguide is configured to be electromagnetically coupled to the patch antenna element. The dielectric lens is disposed in the distal aperture.

A holographic antenna for recording a comprehensive interference pattern beyond the mere minimum and maximum values and reconstructing waveform of a target antenna includes a feed antenna and a holographic structure. The holographic structure includes a substrate and a plurality of spaced metal strips disposed on the substrate. Heights of the metal strips are negatively correlated with intensities of the interference pattern. A method for fabricating such a holographic antenna is also provided.

An antenna system (201) comprising a set of transmitting elements (320A-K) and a set of receiving elements (310A-N) formed on a same or different planar surface (210), an electromagnetic lens (220) to focus electromagnetic rays transmitted from the set of transmitting elements (320A-K), a convex secondary antenna (240) operative to reflect the electromagnetic rays and a concave parabolic primary antenna (230) operative to transmit the electromagnetic rays in a first direction such that, the lens, the convex secondary antenna and the concave parabolic primary antenna together provide a transmitting gain in the first direction. The set of transmitting elements are disposed at central area of the planar surface and the set of receiving elements are disposed on the periphery of the central area such that the set of receiving elements occupy larger area on the planar surface compared to the set of transmitting elements.

A patch antenna includes: a ground conductor pattern lying in a plane and set to ground potential; a feeding conductor pattern lying in a plane and disposed in a manner so as to face the ground conductor pattern, the feeding conductor pattern having feed points that are opposite to each other with respect to a center point of the feeding conductor pattern; feed lines that are connected in parallel between the feed points and are of different lengths; and a frequency selection circuits disposed on a path of at least one of the feed lines, the frequency selection circuits being configured to allow passage of radio-frequency signals in one frequency band and to attenuate radio-frequency signals in another frequency band.

An antenna device includes an antenna unit and reflecting units. The antenna unit is arranged on a substrate. The reflecting units are arranged separately from each other on the substrate and surrounding the antenna unit. The reflecting units are configured to adjust a radiation pattern of the antenna unit, and each of the reflecting units includes a first portion and a second portion. The first portion has an upper side and a lower side, and the lower side of the first portion is coupled to the substrate. The second portion has a lower side connected to the upper side of the first portion. A width of the lower side of the first portion is smaller than a width of the lower side of the second portion.