Disclosed herein is an antenna device that includes a first molded substrate having first and second surfaces opposite to each other, a second molded substrate having third and fourth surfaces opposite to each other, a first electrode formed on the first surface of the first molded substrate, a feed electrode formed on the second surface of the first molded substrate so as to overlap the first electrode in a plan view, and a first ground electrode formed on the third surface of the second molded substrate. The first and second molded substrates overlap each other such that the second surface of the first molded substrate and the fourth surface of the second molded substrate face each other.

Disclosed herein is an antenna device that includes a first molded substrate having first and second surfaces opposite to each other, a second molded substrate having third and fourth surfaces opposite to each other, a first electrode formed on the first surface of the first molded substrate, a feed electrode formed on the second surface of the first molded substrate so as to overlap the first electrode in a plan view, and a first ground electrode formed on the third surface of the second molded substrate. The first and second molded substrates overlap each other such that the second surface of the first molded substrate and the fourth surface of the second molded substrate face each other.

RF signal transmission devices for a base station antenna include a printed circuit board which has a dielectric layer, a metal pattern layer on a first main surface of the dielectric layer, and a ground layer on a second main surface of the dielectric layer. The metal pattern layer has a transmission line deformation section for enhancing the ability to withstand surge current, and the ground layer comprises a groove that is configured to at least partially compensate for the change in the characteristic impedance due to the transmission line deformation section. The RF signal transmission device can achieve good characteristic impedance matching whilst enhancing the capacity to withstand surge current. In addition, the RF signal transmission device can improve PIM performance. The present disclosure also includes a phase shifter for a base station antenna and a base station antenna.

RF signal transmission devices for a base station antenna include a printed circuit board which has a dielectric layer, a metal pattern layer on a first main surface of the dielectric layer, and a ground layer on a second main surface of the dielectric layer. The metal pattern layer has a transmission line deformation section for enhancing the ability to withstand surge current, and the ground layer comprises a groove that is configured to at least partially compensate for the change in the characteristic impedance due to the transmission line deformation section. The RF signal transmission device can achieve good characteristic impedance matching whilst enhancing the capacity to withstand surge current. In addition, the RF signal transmission device can improve PIM performance. The present disclosure also includes a phase shifter for a base station antenna and a base station antenna.

An antenna device includes: a dielectric substrate having a feed line and a radiation unit provided on a first surface and having a ground conductor provided on a second surface opposite to the first surface; and a pair of second slits that is provided on a side of the radiation unit facing a side to which the feed line is connected and expands in directions away from each other toward the side to which the feed line is connected when the first surface is viewed from above.

An antenna device includes: a dielectric substrate having a feed line and a radiation unit provided on a first surface and having a ground conductor provided on a second surface opposite to the first surface; and a pair of second slits that is provided on a side of the radiation unit facing a side to which the feed line is connected and expands in directions away from each other toward the side to which the feed line is connected when the first surface is viewed from above.

An antenna apparatus includes a first component layer having a plurality of antenna elements forming an antenna array. A second component layer includes: (i) a plurality of RFICs coupled to the antenna elements, where each RFIC has active beamforming circuitry to adjust signals communicated with one or more of the antenna elements, and a portion of a first stage of a beamforming network (BFN); and (ii) an additional stage and a further stage of the BFN, each disposed externally of the RFICs. At least some of the RFICs include an intermediate amplifier coupled between the additional and further stages of the BFN.

An antenna apparatus includes a first component layer having a plurality of antenna elements forming an antenna array. A second component layer includes: (i) a plurality of RFICs coupled to the antenna elements, where each RFIC has active beamforming circuitry to adjust signals communicated with one or more of the antenna elements, and a portion of a first stage of a beamforming network (BFN); and (ii) an additional stage and a further stage of the BFN, each disposed externally of the RFICs. At least some of the RFICs include an intermediate amplifier coupled between the additional and further stages of the BFN.

A microstrip electrical antenna (1) and its respective method of manufacturing, wherein the antenna (1) is of the electrically small kind being configured based on at least one wave parameter with which it will be operated. The present disclosure also refers to an equipment endowed with the electrical antenna (1).

An antenna device includes a ground electrode, a feed element, and a parasitic element. The ground electrode has a substantially non-square rectangular plane shape that includes a first side extending in a first direction and a second side extending in a second direction orthogonal to the first direction. The feed element has a substantially rectangular plane shape and is formed in such a way that each side of the feed element becomes parallel to the first direction or the second direction. The parasitic element is formed in such a manner as to face a side of the feed element parallel to the first side. The feed element is configured to radiate a first polarized wave that excites in the first direction and a second polarized wave that excites in the second direction. The length of the first side is longer than the length of the second side.