Abstract: An antenna system includes a dual-polarized antenna, a main reflector, and an auxiliary reflector. The dual-polarized antenna includes a first antenna element and a second antenna element. The first antenna element and the second antenna element operate in a low-frequency band and a high-frequency band. The first antenna element and the second antenna element have different polarization directions. The main reflector is configured to reflect the electromagnetic waves in the low-frequency band. The auxiliary reflector is positioned between the dual-polarized antenna and the main reflector, and is configured to reflect the electromagnetic waves in the high-frequency band.

Abstract: A communication device includes an antenna system, a metal base, and a metal elevating pillar. The antenna system at least includes a dual-polarized antenna and a reflector. The reflector is configured to reflect radiation energy from the dual-polarized antenna. The metal elevating pillar is coupled between the antenna system and the metal base, and is configured to support the antenna system.

Abstract: An antenna system includes a system ground plane, a first antenna array, and a second antenna array. The first antenna array includes a first antenna element, a second antenna element, a third antenna element, and a fourth antenna element. The second antenna array includes a fifth antenna element, a sixth antenna element, a seventh antenna element, and an eighth antenna element. The second antenna array is disposed between the first antenna array and the system ground plane. The first antenna array has a first polarization direction. The second antenna array has a second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other.

Abstract: A smart antenna module includes an omni-directional antenna and at least one reflecting unit for adjusting a radiation pattern of the smart antenna module, wherein the one reflecting unit includes a reflector and a switch coupled between the reflector and a ground of the omni-directional antenna for electrically connecting the reflector with the ground or separating the reflector from the ground according to a control signal to adjust the radiation pattern of the smart antenna module.

Abstract: An antenna system includes a ground metal element, a first signal source, a first antenna, a second signal source, a second antenna, an isolation metal element, and a matching circuit. The first signal source is connected to the ground metal element. The first antenna is connected to the first signal source. The first signal source is configured to excite the first antenna. The second signal source is connected to the ground metal element. The second antenna is connected to the second signal source. The second signal source is configured to excite the second antenna. The isolation metal element is disposed between the first antenna and the second antenna, and is configured to improve the isolation between the first antenna and the second antenna. The matching circuit is connected between the isolation metal element and the ground metal element.

Abstract: A switchable antenna includes a substrate, a first antenna element, a second antenna element, a first switch element, a second switch element, a first radiating portion on an upper surface of the substrate including a first center, a first bend section and a second bend section, and a second radiating portion on an lower surface of the substrate including a second center, a third bend section and a fourth bend section. The third and the fourth bend sections extending from the second center are respectively disposed corresponding to the first and the second bend sections extending from the first center. The first and the second antenna elements on the upper surface are disposed corresponding to the first and the second bend sections. The first and the second switch elements are respectively configured to switch the first and the second antenna elements between a reflector and a parasitic radiating element.

Abstract: A smart antenna comprises a dipole antenna, a first reflector unit, a first diode, a first RF choke unit and a second RF choke unit. The dipole antenna has a first radiating portion and a second radiating portion. The first radiating portion is used for feeding an RF signal and a DC voltage signal controlling the conduction status of the first diode simultaneously. The first reflector unit is disposed on a first side of the dipole antenna and parallel to the dipole antenna. A first section and a second section of the first reflector unit are electrically connected by the first diode. The first RF choke unit is electrically connected between the first radiating portion and the first section of the first reflector unit. The second RF choke unit is electrically connected between the second radiating portion and the second section of the first reflector unit.

Abstract: An antenna system includes a dual-polarized antenna, a main reflector, and an auxiliary reflector. The dual-polarized antenna includes a first antenna element and a second antenna element. The first antenna element and the second antenna element operate in a low-frequency band and a high-frequency band. The first antenna element and the second antenna element have different polarization directions. The main reflector is configured to reflect the electromagnetic waves in the low-frequency band. The auxiliary reflector is positioned between the dual-polarized antenna and the main reflector, and is configured to reflect the electromagnetic waves in the high-frequency band.

Abstract: A microstrip antenna transceiver with switchable polarization, used in a satellite signal reception device, includes a base board, having a first surface and a second surface; a ground metal plate, disposed on the first surface of the base board; an antenna module, disposed on the ground metal plate, having a radiating metal patch, a vertically polarized feeding hole and a horizontally polarized feeding hole; a first switch, set on the second surface of the base board; a second switch, set on the second surface of the base board; a first microstrip wire, electrically connected between the vertically polarized feeding hole of the antenna module and the first switch; and a second microstrip wire, electrically connected between the horizontally polarized feeding hole of the antenna module and the second switch.

Abstract: An antenna system includes a signal source, a plurality of switch elements, a plurality of transmission lines, a plurality of antenna elements, and a plurality of reflectors. The signal source is coupled to a feeding point. The switch elements are selectively closed or opened individually. Each of the antenna elements is coupled through one of the switch elements and one of the transmission lines to the feeding point. Each of the reflectors is configured to reflect an electromagnetic wave from one of the antenna elements.

Abstract: A dual-band antenna including a ground element, a radiation element and at least one open slot is provided. The radiation element has a bending to form a first radiation portion and a second radiation portion. The first radiation portion has a feeding point adjacent to the ground element. The width of the first radiation portion is gradually increased along a direction far away from the ground element. The second radiation portion forms an orthogonal projection on the ground element. One open slot at least passes through the second radiation portion.

Abstract: A radio-frequency transceiver system includes a first plane, a second plane perpendicular to the first plane, a third plane perpendicular to the first plane and the second plane, a first antenna element and a plurality of second antenna elements. The first antenna element includes a first radiation plate disposed on the first plane, a second radiation plate disposed on the first plane, a third radiation plate disposed on the second plane and a fourth radiation plate disposed on the second plane. The plurality of second antenna elements form an antenna array structure. The antenna array structure is symmetric with respect to the first plane and the second plane. Each of the second antenna elements is dual-polarized dipole antenna.

Abstract: A complex antenna configured to transmit or receive radio-frequency signals includes a first antenna unit and a second antenna unit. The first antenna unit is fixed to the second antenna unit with a first included angle, and the complex antenna does not have a closed annular structure.

Abstract: A radio-frequency transceiver system, configured to support multiple-input multiple-output communication technology, includes a first complex antenna having a plurality of first antenna units; and a second complex antenna, having a plurality of second antenna units. The plurality of first antenna units and the plurality of second antenna units are regularly and alternately arranged to form an annular structure, and the first complex antenna and the second complex antenna are switched between a single-beam mode and a combined-beam mode respectively to transmit or receive radio-frequency signals.

Abstract: An antenna system includes a ground metal element, a first signal source, a first antenna, a second signal source, a second antenna, an isolation metal element, and a matching circuit. The first signal source is connected to the ground metal element. The first antenna is connected to the first signal source. The first signal source is configured to excite the first antenna. The second signal source is connected to the ground metal element. The second antenna is connected to the second signal source. The second signal source is configured to excite the second antenna. The isolation metal element is disposed between the first antenna and the second antenna, and is configured to improve the isolation between the first antenna and the second antenna. The matching circuit is connected between the isolation metal element and the ground metal element.

Abstract: A planar dual polarization antenna for receiving and transmitting radio signals includes a feeding transmission line layer, a first dielectric layer formed on the feeding transmission line layer, a metal grounding plate, a second dielectric layer formed on the metal grounding plate, and a first patch plate formed on the second dielectric layer with a shape substantially conforming to a cross pattern. A first slot and a second slot of the metal grounding plate are electrically coupled to a first feeding transmission line and a second feeding transmission line of the feeding transmission line layer respectively, to increase bandwidth of the planar dual polarization antenna.

Abstract: An antenna system includes a system ground plane, a first antenna array, and a second antenna array. The first antenna array includes a first antenna element, a second antenna element, a third antenna element, and a fourth antenna element. The second antenna array includes a fifth antenna element, a sixth antenna element, a seventh antenna element, and an eighth antenna element. The second antenna array is disposed between the first antenna array and the system ground plane. The first antenna array has a first polarization direction. The second antenna array has a second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other.

Abstract: An antenna device includes a first dipole antenna and a second dipole antenna. The polarization direction of the first dipole antenna is a first direction, and the polarization direction of the second dipole antenna is the first direction. Each of the first dipole antenna and the second dipole antenna includes at least one first radiator and at least one second radiator, and there is a notch between the first and second radiators. The notch of the first dipole antenna is towards a second direction, and the notch of the second dipole antenna is toward a third direction that is different from the second direction.

Abstract: A collinear dipole antenna includes first and second radiators. The first radiator includes a first arm and at least one second arm including first and second branches, and the second radiator includes a third arm and at least one fourth arm including third and fourth branches. The first and third branches have negative current phases and meandering shapes, and the first and third arms and the second and fourth branches have positive current phases. Widths of the first and third arms gradually increase to a maximum width and gradually decrease after the maximum width is reached. Widths of the second and fourth branches gradually increase to the maximum width and gradually decrease after the maximum width is reached.

Abstract: A multiband antenna configuration method for configuring a multiband antenna to transmit and receive radio signals of a plurality of frequency bands includes determining a distance between a magnetic conductor reflector and a first radiation portion, calculating a first and second reflection phase value at the first and second center frequency of a first and second frequency band according to a configuration requirement corresponding to the distance, determining a length and width of the multiband antenna, adjusting materials and geometric features of the magnetic conductor reflector to change a curve representing relationship between reflection phases of the magnetic conductor reflector and frequencies and to make the first reflection phase corresponding to the first center frequency and the second reflection phase corresponding to the second center frequency equal to a first reflection phase value and second reflection phase value, and determining the materials and geometric features according to the curve.