6 results about "Impedance matching" patented technology

In order to transmit high-speed digital signals of several tens of GHz through differential lines, a signal transmission system for transmitting digital signals between circuit blocks via signal transmission lines is provided by connecting a ground-referenced differential line to a non-ground-referenced differential line, Each circuit block basically includes a functional circuit, a receiving/transmitting circuit formed separately from the functional circuit, and an impedance-matched transmission line (115) formed between the receiving end and the transmitting end of the receiving/transmitting circuit; reference ground (110) The differential line (105) is drawn from the differential output driver, and a differential signal line is formed symmetrically with respect to the ground (110) in the circuit block. In the signal transmission line (115), there are only differential pair lines that are not referenced to ground (111, 112) extend directly from differential signal lines arranged symmetrically with respect to ground potential.

The invention relates to a high-speed serial port load automatic calibration circuit. One end of a port load resistor array of the high-speed serial port load automatic calibration circuit is connected with an analog power supply, the other end is connected with an input end of a first current source, and an output end of the first current source is connected to the ground; one end of a high-precision resistor is connected with an analog power supply, the other end is connected with an input end of a second current source, and an output end of the second current source is connected to the ground; one end of a high-speed serial port resistor array is connected with an analog power supply; a negative input end of a comparator is connected between the port load resistor array and the first current source, a positive input end is connected between the high-precision resistor and the second current source, the comparator compares voltage values of the high-precision resistor and the port load resistor array and outputs a comparison result signal to a digital state machine, the digital state machine generates a control signal to control resistance of the port load resistor array and the high-speed serial port resistor array. The high-speed serial port load automatic calibration circuit provided by the invention realizes automatic calibration of the high-speed serial port load resistor, and achieves an impedance matching effect of a high-speed serial port.

The present disclosure provides a unipolar MIMO antenna, which consists of a plurality of unipolar RF antennae. Each of the unipolar RF antennae comprises a metal sheet and a feeder line. The metal sheet is enchased with a metal microstructure thereon, and the feeder line and the metal sheet are connected in a signal communicative manner. The unipolar MIMO antenna of the present disclosure breaks through the framework of the conventional antenna design and eliminates the complex design of the impedance matching network to ensure miniaturization of the antenna. Thereby, the antenna can be used in a wireless apparatus having a small size, a high transmission efficiency and a high isolation degree among antennae and can satisfy the requirement of a low power consumption in the design of modern communication systems. Additionally, the present disclosure further provides a bipolar MIMO antenna and a hybrid MIMO antenna.

The invention provides a novel and intelligent Bluetooth-WIFI integrated module. The novel and intelligent Bluetooth-WIFI integrated module comprises an antenna, a switch switching unit, an impedance matching circuit, a power amplification and filtering unit, a transceiver, a first AD/DA conversion circuit, a band-pass filter, a balance converter, a second AD/DA conversion circuit, a controller, a register and a data interface. An input end of the antenna is connected with an output end of the switch switching unit. The switch switching unit is connected with the impedance matching circuit and the band-pass filter. The impedance matching circuit is connected with the power amplification and filtering unit. The power amplification and filtering unit is connected with the transceiver. The transceiver is connected with the first AD/DA conversion circuit. The band-pass filter is connected with the balance converter. The balance converter is connected with the second AD/DA conversion circuit. The controller is connected with the second AD/DA conversion circuit, the first AD/DA conversion circuit, the register and the data interface.

The invention discloses an ultra-wideband MIMO antenna with an isolation structure, belongs to the technical field of ultra-wideband MIMO antennas, and particularly relates to the isolation structure of the ultra-wideband MIMO antenna. According to the technical scheme disclosed by the invention, two monopole antenna units are orthogonally placed; and the isolation structure is placed on an angular bisector of the two orthogonal monopole antenna units. A cucurbit flute-like shape is adopted by the isolation structure; high isolation between the units is achieved by the antenna on an overall ultra-wideband by controlling the dimensions of different regions in structure; and a good impedance matching effect is kept. The isolation structure disclosed by the invention has the advantage of small dimension, meanwhile, the dimensions of various parts of the structure can also be conveniently adjusted according to the actual matching and isolating effects of the antenna, so that good impedance matching of the antenna units in the ultra-wideband and isolation between the units are achieved.