A ground conductor (1) having slots (2a to 2g) for radiating electromagnetic waves, a ground conductor (3) in which cavities (4) recessed in a direction away from the ground conductor (1) is formed in positions opposite to the slots (2a to 2g) of the grounding conductor (1), and central conductors (5a, 5b, 6a to 6c, 7a, and 7b) arranged in positions overlapping with the slots (2a to 2g), respectively, between the ground conductor (1) and the ground conductor (3) are provided. The central conductors (5a, 5b, 6a to 6c, 7a, and 7b) are arranged such that the ground conductor (1) is closer to them than the ground conductor (3).

A scanning true time delay antenna includes a first layer including at least one first corporate feed having a first port and a plurality of second ports communicatively coupled to the first port, and a second layer disposed over the first layer and rotatable relative to the first layer. The second layer includes a plurality of second corporate feeds each having a third port and a plurality of fourth ports communicatively coupled to the respective third port, and a plurality of radiators, wherein each of the plurality of radiators is communicatively coupled to a respective one of the plurality of fourth ports. A plurality of first variable time delay lines are arranged at least partially in at least one of the first layer or the second layer, wherein each of the plurality of second ports is communicatively coupled to a respective one of the plurality of first variable time delay lines, and each third port is communicatively coupled to a respective one of the plurality of first variable time delay lines. Rotation of the second layer relative to the first layer creates a linear progressive length change from the first port to each of the radiators.

The present invention relates to the field of communications technologies and discloses an antenna system, and the antenna system includes: a radiating element, at least one strip line ground plane and signal cavity, and at least one inner conductor, where the radiating element includes radiation arms, radiation baluns, and feeding inner cores; the strip line ground plane is used as a reflective surface of the radiating element; the baluns of the radiating element are electrically connected to the strip line ground plane, and all of at least two feeding inner cores of the radiating element are electrically connected to one inner conductor. Therefore, a feeding manner of an existing array antenna can be optimized very conveniently, assembly time is greatly reduced, quantities of welding points and cables are reduced, and consistency and reliability are improved.

An antenna array includes an array of antenna bodies arranged on a planar structure, which, in turn, contains a circuit board with a ground-plane layer. The array of antenna bodies is arranged on a top side of the circuit board. Each of the antenna bodies is dome shaped and attached to the top side of the circuit board along its base. Each of the antenna bodies is connected to a respective top transmission line configured to convey microwave signals to and/or from said antenna bodies. The top transmission lines are further connected to bottom transmission lines via coaxial probes through the ground-plane layer. A resonance cavity is arranged below the top side of the circuit board between each of the antenna bodies. This accomplishes a highly compact design that can be produced in a cost-efficient manner.

Presently disclosed is an antenna system having an array of ridged waveguide Vivaldi radiator (RWVR) antenna elements fed through a corporate network of suspended air striplines (SAS). The SAS transfers the electromagnetic energy to the radiating element via the ridged waveguide coupler. The Vivaldi radiator matches the output impedance of the ridged waveguide coupler/SAS to the impedance of the surrounding medium. Because the coupling method and the radiating elements are wideband mediums, this antenna array is capable of wideband operation. The physical dimensions of the resulting array are also not as sensitive to its electrical performance as other antenna designs since the bandwidth is quite large, reducing the occurrence of an out-of-specification antenna due to manufacturing tolerance build-up. This also reduces the complexity of the manufacturing process, which in turn lowers cost.

Base station antennas, and components for base station antennas, such as reflectors, feeder components, frames, and column components. A base station antenna may include a reflector; a first radiator located at the front side of the reflector; mutually parallel first and second ground plates extending backward from the reflector and basically perpendicular to the reflector; and a first conductor strip extending between the first and second ground plates and configured to feed power to the first radiator. The first conductor strip and the first and second ground plates may be configured as a first stripline transmission line. The reflector and the first and second ground plates may be configured as one piece so that the reflector is grounded via the first and second ground plates without soldering.

Base station antennas, and components for base station antennas, such as reflectors, feeder components, frames, and column components. A base station antenna may include a reflector; a first radiator located at the front side of the reflector; mutually parallel first and second ground plates extending backward from the reflector and basically perpendicular to the reflector; and a first conductor strip extending between the first and second ground plates and configured to feed power to the first radiator. The first conductor strip and the first and second ground plates may be configured as a first stripline transmission line. The reflector and the first and second ground plates may be configured as one piece so that the reflector is grounded via the first and second ground plates without soldering.

An antenna device includes an input/output portion for a high frequency signal to be input or output, a distributing portion for distributing the high frequency signal input to the input/output portion into a plurality of high frequency signals, a phase shifting portion for imparting the plurality of high frequency signals with a predetermined amount of phase shift, and a feeding portion for feeding a plurality of antenna elements with the plurality of high frequency signals imparted with the predetermined amount of phase shift to cause the plurality of antenna elements to radiate the plurality of high frequency signals. The feeding portion is configured as a triplate line with a center conductor placed between one pair of parallel plate shaped outer conductors.

A mobile communication antenna with at least one dual-polarized radiator comprises a first metal plate arrangement with a first and second side. A first printed circuit board arrangement is provided which is arranged on the second side of the first metal plate arrangement. A first free space formed between the first printed circuit board arrangement and the first metal plate arrangement. The first metal plate arrangement comprises at least one first opening through which a first feed connection of the at least one dual-polarized radiator is passed. The first feed connection is electrically connected to a first signal line on the first printed circuit board arrangement. The first feed connection of the at least one dual-polarized radiator is surrounded by an electrically conductive first shielding in a non-contacting manner.

A scanning true time delay antenna includes a first layer including at least one first corporate feed having a first port and a plurality of second ports communicatively coupled to the first port, and a second layer disposed over the first layer and rotatable relative to the first layer. The second layer includes a plurality of second corporate feeds each having a third port and a plurality of fourth ports communicatively coupled to the respective third port, and a plurality of radiators, wherein each of the plurality of radiators is communicatively coupled to a respective one of the plurality of fourth ports. A plurality of first variable time delay lines are arranged at least partially in at least one of the first layer or the second layer, wherein each of the plurality of second ports is communicatively coupled to a respective one of the plurality of first variable time delay lines, and each third port is communicatively coupled to a respective one of the plurality of first variable time delay lines. Rotation of the second layer relative to the first layer creates a linear progressive length change from the first port to each of the radiators.