Systems and methods relating to patch antennas. A patch antenna has a substrate, a resonant metal plate at one side of the substrate, and a ground plane at the other opposite side of the substrate. Two feed pins are used to couple the antenna to other circuitry. The feed pins pass through the substrate and holes in at the ground plane. The feed pins are physically disconnected from both the resonant metal plate and the ground plane. The feed pins are capacitively coupled to the resonant metal plate to provide an electronic connection between other circuitry and the patch antenna.

The present invention relates to a directional antenna module comprising: at least one antenna array having at least two antenna elements connected to a 180-degree hybrid providing an inphase summation signal and an out-of-phase summation signal of the antenna signals received from the antenna elements and a switching element adapted to switch between the inphase summation signal and the out-of-phase summation signal output by said 180-degree hybrid in response to a direction finding mode control signal (DFM-CRTL) to provide an antenna output signal at an antenna module output of said directional antenna module. The present invention further relates to a method for direction finding of a signal source.

Provided is a dual-polarized dipole antenna. The dual-polarized dipole antenna includes a substrate etched as first and second microstrip lines and provided in a cube, first to fourth feeding lines etched as third microstrip lines and disposed in a square type in a vertical direction to the substrate, and first to fourth radiation patches disposed in a square type in the vertical direction to the first to fourth feeding unit, wherein the first to fourth feeding units are respectively disposed on adjacent pairs of the first to fourth radiation patches. According to the present invention, a miniature dual-polarized dipole antenna having a wide bandwidth, high isolation characteristics, and a high gain can be provided.

Embodiments provide a base station, including an antenna unit and a radio frequency unit. A port corresponding to a receive channel that is of the radio frequency unit and in a working state and a port corresponding to a transmit channel that is of the radio frequency unit and in the working state are separately connected to ports corresponding to different dual-polarized dipoles or different single-polarized dipoles in the antenna unit. The different dual-polarized dipoles or the different single-polarized dipoles in the antenna unit are mutually isolated.

An out-of-band coupled antenna combined by fine-and-straight antenna and bow-tie antenna is provided, including: a dielectric slab (1), an AA radiation element (2) provided on an upper plate (1A) of the dielectric slab (1) by a , a cooper pouring process, a BA radiation element (3), an A feeder line (4) and a B feeder line (5); an AB radiation element (8) provided on a lower plate (1B) of the dielectric slab (1), a BB radiation element (9), a C feeder line feeder (6) and a D feeder line (7); a first sensor (10A) and a second sensor (10B) which are connected on the AA radiation element (2); a third sensor (10C) and a fourth sensor (10D) which are connected on the AB radiation element (8). The antenna is capable of suppressing out-of-band coupling between indication elements to improve the separation degree.

Flexible antennas for harvesting electromagnetic energy are described. The flexible antenna may be a far field antenna and may comprise a flexible substrate, a first metal layer disposed on one side of the flexible substrate, and a second metal layer disposed on an opposite side of the flexible substrate. The first and second metal layers may be connected through one or more vias. The first metal layer may be sized to capture electromagnetic energy at a frequency in an ISM band.

An antenna assembly includes a main body, a coaxial cable connecting the main body and an isolating member located beside the main body. The main body includes a grounding portion extending in a longitudinal direction, a radiating portion extending in the longitudinal direction and a connecting portion connecting the grounding portion and the radiating portion. The coaxial cable includes an inner conductor connecting the connecting portion and an outer conductor surrounding the inner conductor and connecting the grounding portion. The isolating member located beside the main body in a side by side manner and defined a gap therebetween.

An antenna system includes a first dipole antenna element and a second dipole antenna element. The first dipole antenna element includes a first feeding radiation element and a first grounding radiation element. The first feeding radiation element has an extension portion. The first grounding radiation element has an open slot. The extension portion extends into the interior of the open slot. The second dipole antenna element includes a second feeding radiation element and a second grounding radiation element. The first dipole antenna element and the second dipole antenna element are both excited by a signal source. The first dipole antenna element operates in a low-frequency band. The second dipole antenna element operates in a high-frequency band.

The present invention provides methods and devices to radiate wideband signals. The devices may include a tunable high Q narrowband antenna having a plurality of ports including a feed port and a tuning port as well as a tuning element coupled to the tuning port of the antenna. One or more voltage sources supply energy for radiating a radio frequency signal. A modulating signal generator may also be provided for generating a high data rate signal coupled at the tuning element for modulating the tuning element.

The present invention provides methods and devices to radiate wideband signals. The devices may include a tunable high Q narrowband antenna having a plurality of ports including a feed port and a tuning port as well as a tuning element coupled to the tuning port of the antenna. One or more voltage sources supply energy for radiating a radio frequency signal. A modulating signal generator may also be provided for generating a high data rate signal coupled at the tuning element for modulating the tuning element.