6results about How to "High port isolation" patented technology

An ultra-wideband end-fire antenna with a common aperture embedded in a metal carrier includes a metal cavity with a coaxial cable compartment on one side. A radiator module is connected to the bottom of the metal cavity via a radiator fixing slot. The radiator module includes a common aperture antenna substrate. A low-frequency radiator is printed on the side of the common aperture antenna substrate closer to the coaxial cable compartment, and a high-frequency radiator is printed on the side farther from the coaxial cable compartment. This invention utilizes a dual-band antenna in a common aperture design to enhance the channel capacity and anti-fading capability of the communication system. At the same time, by achieving the antenna's carrier conformal characteristics, high isolation, and miniaturization, it enriches the antenna's application scenarios and improves the overall performance of the communication system.

The application discloses a kind of full duplex antennas based on slot coupling differential feed, including two pairs of butterfly dipole antennas, first dielectric plate, four groups of vertically placed signal transmission lines, metal floor, second dielectric plate, two U-shaped feed networks and third dielectric plate;The application is placed on the upper surface and lower surface of first dielectric plate by setting two pairs of butterfly dipole antennas, to radiate horizontal polarization and vertical polarization wave, in order to generate differential signal, four T-shaped slots with the same size are etched on the metal floor, then the differential signal at T-shaped slot is transmitted to the feed position of dipole antenna by four groups of vertically placed transmission lines, and the two U-shaped feed networks are placed vertically without dielectric layer, so as to obtain larger port isolation, which can be applied to simultaneous same frequency full duplex communication system, and wireless signals can be transmitted and received simultaneously at the same frequency, thereby improving spectrum utilization efficiency.

The invention discloses a directional coupler device based on a power divider, and relates to the technical field of directional couplers, and the power divider is used for dividing input power into a plurality of equal or unequal power outputs. Comprising a first port, a second port, a third port, a first microstrip line, a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line, a sixth microstrip line, a seventh microstrip line, a first isolation resistor and a second isolation resistor. The frequency working range of the directional coupler can be expanded by increasing the order of the power divider, the directionality of the directional coupler is high, high port isolation can be achieved due to the fact that isolation resistors exist in output ports of the power divider, and therefore the high directionality of the directional coupler is achieved, and due to the fact that only microstrip lines, chip resistors and differential conversion devices are arranged, the circuit is simple, and cost is low. The directional coupler is simple in structure and easy to debug, can realize low insertion loss by using an unequal power divider, can be used for a vector network analyzer, and can output a reflected signal of a test port to a receiver of the vector network analyzer to obtain amplitude information and phase information of the reflected signal.

The present invention discloses an isolation-enhanced millimeter-wave dual-frequency dual-polarization antenna. In the antenna, a first annular metal patch and a plurality of metal pillars together constitute an isolation device; in the low frequency band, the isolation device has a band-stop characteristic, reflects the input signal back to the port, and effectively improves the isolation between the low-frequency ports; in the high frequency band, the currents on the multiple metal pillars of the isolation device are reversed and canceled to effectively reduce the isolation between the two ports, while also reducing the coupling effect of the second annular metal patch on the port; therefore, the isolation device has the effect of enhancing isolation in both frequency bands. The antenna unit of the present invention has the characteristics of simple structure, small size, dual frequency, dual polarization and high isolation, and can meet the requirements of 5G millimeter-wave broadband high-speed wireless communication systems applied to 24GHz-29GHz and 37GHz-50GHz.

The invention provides a low-RCS (radar cross section) dual-polarized antenna compact unit based on secondary interference cancellation. The low-RCS dual-polarized antenna compact unit comprises a first dielectric plate, a second dielectric plate, a radiation patch, a metal floor and a dual-polarized feed network. The radiation patch is composed of four metal patches which are symmetrically distributed in a 90-degree rotation mode, each patch comprises a triangular part, the first edge of the triangular part faces outwards, and the opposite angles of the triangular part face the center. The metal floor is located on the lower surface of the first dielectric plate, an isolation hole is formed in the metal floor, a preset vertical distance is kept between the metal floor and the radiation patch, and the preset vertical distance is configured to enable scattered waves generated by the radiation patch and scattered waves generated by the metal floor to have a phase difference of 180 degrees + / -37 degrees in a preset frequency band; and the first side of each patch is connected with the floor through a plurality of short-circuit metal through holes which are distributed at equal intervals. And the dual-polarization feed network is positioned on the lower surface of the second dielectric plate, comprises two paths of orthogonal polarization networks, and is connected with the patch through a feed metal through hole penetrating through the isolation hole.