36results about How to "Improve cross polarization" patented technology

A chip integrated waveguide feeding print antenna is composed by a chip with its two metal sides being transfixed with metal through holes in array. The two metal sides are in axial symmetry. There is an intergrading section to one side of the waveguide centerline on two surface of the chip linking with transmission line. To the outer end of the intergrading section links a vibrator antenna. To the opposite side of the intergrading section on the waveguide links a micro-strip intergrading commutator linking with micro-strip transmission line.

The present invention relates to an in-service reconfigurable antenna reflector comprising a rigid support and a membrane, deformable and having radio-electric reflectivity properties. According to the invention, the reflector comprises a plurality of coupling means connecting the rigid support and the membrane, comprising a first link of finger ball joint type connected to the rigid support, and a second link of finger ball joint type connected to the membrane. Each coupling means furthermore comprises a linear actuator, comprising a rotary motor and a screw-nut assembly, connected to the two links of finger ball joint type, and able to generate, in an operational configuration, a translational motion allowing the deformation of the membrane.

The invention discloses a dual-frequency feed horn including a metal ring, which includes a first frequency band feed horn, a second frequency band circular waveguide, and a metal ring for impedance matching. The first frequency band is lower than the second frequency band, and the second frequency band The circular waveguide is coaxially arranged in the cavity of the first frequency band feed horn, and the signal of the first frequency band passes through the first cavity formed between the outer surface of the second frequency band circular waveguide and the cavity side wall of the first frequency band feed horn Body transmission, the signal of the second frequency band is transmitted through the inner cavity of the circular waveguide of the second frequency band; the metal ring is coaxially arranged in the first cavity for transmitting the signal of the first frequency band. The advantage of this invention is that: since the feed speakers have different index requirements, in the coaxial feed technical solution, the first cavity realizes the effective radiation of electromagnetic waves in the first frequency band, and the circular waveguide in the second frequency band realizes the effective radiation of electromagnetic waves in the second frequency band. The innovative loading metal ring in the first cavity achieves good impedance matching, thus meeting the different index requirements of the feed speaker.

The present invention provides a multi-frequency dual-polarized antenna, which includes a reflector, at least one low-frequency radiation unit disposed on the reflector, and at least one high-frequency radiation unit adjacent to the low-frequency radiation unit, the high-frequency radiation An isolation frame is arranged on the periphery of the unit, and at least one layer of suspension strips is arranged above the isolation frame. The multi-frequency dual-polarization antenna of the present invention adopts a new boundary structure, the consistency of high-frequency wave width is improved, the deformation is reduced, the cross-polarization is improved, and the cross-polarization of the high-frequency pattern is significantly improved.

The invention discloses a differential Quasi-Yagi antenna with a filtering function. The differential Quasi-Yagi antenna with the filtering function comprises a substrate, wherein the substrate comprises an upper layer, a lower layer and a middle layer, the upper layer and the lower layer are both formed by microwave medium chips, and the middle layer is formed by prepregs. The differential Quasi-Yagi antenna with the filtering function further comprises a director (11), a radiating element (12), a reflector (13), a filter (14) and a transition structure (15). The differential Quasi-Yagi antenna with the filtering function has the advantages that the filtering function and the radiating function are integrated on the premise that the original size of the antenna is not increased, the structure is compact, cross polarization performance is high, and loss is low.

The invention discloses a super-wide band antenna with a notching characteristic. The super-wide band antenna comprises a radiating unit (1), a metal ground plane (2), a medium substrate (3) and a micro-strip feed line (4). A combination body of the radiating unit (1) and the micro-strip feed line (4) is located on the top face of the medium substrate (3). The metal ground plane (2) is located on the bottom face of the medium substrate (3). The radiating unit (1) is in a gradually varied ladder shape. According to the super-wide band antenna with the notching characteristic, the radiating unit (1) adopts a rectangle shape, frequency range of the antenna is expanded through design of the gradually varied steps, and the antenna is convenient to design and debug and can be used in a super-wide band wireless communication system. On the condition that the size of the antenna is minimized, a semi-oval notch or a ladder-shaped notch (5) of the super-wide band antenna improves bandwidth of low frequency stage of the antenna, and achieves impedance bandwidth of a super-wide band.

The invention discloses a wall-mounted antenna, and the antenna comprises a reflection board; a high-frequency oscillator which is disposed above the reflection board, is isolated from the reflection board, and can rotate through a certain angle in the horizontal direction; a low-frequency oscillator which is disposed above the reflection board, is isolated from the reflection board, is located at a side of the high-frequency oscillator, and is far from the high-frequency oscillator; and a feed system. The system comprises a feed board which is disposed below the low-frequency oscillator; a feed network which is disposed on the upper surface of the reflection board, and comprises a feed line equipped with at least two connection points, wherein one connection point of the feed line is connected with the feed board; and at least three coaxial cables, wherein each coaxial cable is connected with the high-frequency oscillator, the low-frequency oscillator, the feed network, and one or two combiners. According to the embodiment of the invention, the antenna is good in performance, is small in size, is stable in structure, and can meet the requirements of various types of polarization modes.