Disclosed is a feed network, which includes a printed circuit board, two microstrip power dividers and two microstrip combiners, and the two microstrip power dividers and two microstrip combiners arranged on the printed circuit board. A microstrip structure of each microstrip power divider is configured to realize impedance matching. Input ends of the two microstrip power divider are configured as two input ends of the feed network, two input ends of each microstrip combiner are respectively connected to one output end of each microstrip power divider, and output ends of the two microstrip combiners are configured as two output ends of the feed network, so that a multiple-input multiple-output feed network is realized. Therefore, when the feed network is applied to a base station antenna, all the radiation units are arranged in a linear matrix to achieve the effect of miniaturization of the base station antenna.

Antennas such as flat panel, leaky wave antennas with directional coupler feeds and waveguides are disclosed. In one example, an antenna includes a surface having antenna elements, a guided wave transmission line, and a coupling surface. The guided wave transmission line provides a guided feed wave. The coupling surface is between and separates the guided wave transmission line and the surface having antenna elements. The coupling surface controls coupling of the guided feed wave to the antenna elements. The coupling surface can also spatially filter the guided feed wave to provide a more uniform power density for the antenna elements. The guided feed wave can be a high power density electromagnetic wave or a density radially decaying electromagnetic wave.

Antennas such as flat panel, leaky wave antennas with directional coupler feeds and waveguides are disclosed. In one example, an antenna includes a surface having antenna elements, a guided wave transmission line, and a coupling surface. The guided wave transmission line provides a guided feed wave. The coupling surface is between and separates the guided wave transmission line and the surface having antenna elements. The coupling surface controls coupling of the guided feed wave to the antenna elements. The coupling surface can also spatially filter the guided feed wave to provide a more uniform power density for the antenna elements. The guided feed wave can be a high power density electromagnetic wave or a density radially decaying electromagnetic wave.

An antenna is provided for operation across multiple frequency bands. The antenna includes, in order, a ground plane and a first conductive member separated from the ground plane. The antenna also includes a pair of second conductive members forming, with the first conductive member, a resonant structure sized to resonate at a higher frequency band of the multiple frequency bands. The antenna further includes a pair of third conductive members forming a resonant structure sized to resonate at a higher frequency band of the multiple frequency bands. The first conductive member is sized to resonate at a lower frequency band of the multiple frequency bands.

A dipole antenna includes a reflector, a radiating element, and a feed element. The radiating element includes first and second dipoles above a surface of the reflector. The first and second dipoles respectively include arm segments and are arranged in a crossed dipole arrangement. The feed element includes first and second conductive transmission lines that are electrically isolated from one another and are capacitively coupled to the arm segments of the first and second dipoles, respectively. The arm segments of the first and second dipoles are between the feed element and the surface of the reflector.

A dipole antenna includes a reflector, a radiating element, and a feed element. The radiating element includes first and second dipoles above a surface of the reflector. The first and second dipoles respectively include arm segments and are arranged in a crossed dipole arrangement. The feed element includes first and second conductive transmission lines that are electrically isolated from one another and are capacitively coupled to the arm segments of the first and second dipoles, respectively. The arm segments of the first and second dipoles are between the feed element and the surface of the reflector.

A mobile device includes a metal mechanism element, a dielectric substrate, a ground plane, a parasitic radiation element, and a feeding radiation element. A connection end of the parasitic radiation element is coupled to the ground plane. The parasitic radiation element includes a first widening portion, which is positioned at a bend of the parasitic radiation element. The parasitic radiation element has a vertical projection on the metal mechanism element. The vertical projection at least partially overlaps a first closed end of the slot. The feeding radiation element is disposed between the parasitic radiation element and the ground plane. The dielectric substrate is adjacent to the metal mechanism element. The parasitic radiation element and the feeding radiation element are disposed on the dielectric substrate. An antenna structure is formed by the parasitic radiation element, the feeding radiation element, and the slot of the metal mechanism element.

A mobile device includes a metal mechanism element, a dielectric substrate, a ground plane, a parasitic radiation element, and a feeding radiation element. A connection end of the parasitic radiation element is coupled to the ground plane. The parasitic radiation element includes a first widening portion, which is positioned at a bend of the parasitic radiation element. The parasitic radiation element has a vertical projection on the metal mechanism element. The vertical projection at least partially overlaps a first closed end of the slot. The feeding radiation element is disposed between the parasitic radiation element and the ground plane. The dielectric substrate is adjacent to the metal mechanism element. The parasitic radiation element and the feeding radiation element are disposed on the dielectric substrate. An antenna structure is formed by the parasitic radiation element, the feeding radiation element, and the slot of the metal mechanism element.

The disclosure concerns an antenna system having a clearance zone coupled to an antenna element, the clearance zone being further coupled to a ground plane. The antenna element and ground plane are electrically coupled by a short cable having a short cable routing. The short cable routing includes at least one bend wherein a portion of the short cable is disposed above the clearance zone. The short cable creates a bridging effect which reduces form factor while retaining lower frequency resonance.

The disclosure concerns an antenna system having a clearance zone coupled to an antenna element, the clearance zone being further coupled to a ground plane. The antenna element and ground plane are electrically coupled by a short cable having a short cable routing. The short cable routing includes at least one bend wherein a portion of the short cable is disposed above the clearance zone. The short cable creates a bridging effect which reduces form factor while retaining lower frequency resonance.