Abstract: A terahertz carrier sending apparatus and a terahertz carrier receiving apparatus include a feed transmission line configured to receive an electrical signal sent by a radio frequency sending circuit. A mode excitation structure is configured to excite a terahertz signal. A mode conversion structure includes an inner cavity whose inner wall is metal. A circuit board is configured to fasten the feed transmission line and the mode excitation structure. The mode conversion structure further includes a positioning slot. A part of the circuit board and the mode excitation structure are inserted into the inner cavity of the mode conversion structure. A plurality of metal through holes are distributed on both sides of the mode excitation structure. A boundary of the positioning slot is metal and press-fitted on the metal through holes on the both sides of the mode excitation structure.

Abstract: The present disclosure describes a terahertz carrier sending apparatus and a terahertz carrier receiving apparatus. The sending apparatus includes a radio frequency sending chip, a mode conversion structure, a terahertz transmission line, and a circuit board. The radio frequency sending chip is packaged on the circuit board, and includes a radio frequency sending circuit, a feed transmission line, and a mode excitation structure. The mode conversion structure includes a metal inner wall, configured to couple a terahertz signal excited by the mode excitation structure into the terahertz transmission line. The terahertz transmission line is configured to transmit the terahertz signal. The receiving apparatus includes a similar part in a receiving direction. The subject matter herein implements efficient electromagnetic coupling and improves data transmission bandwidth.

Abstract: A distributed radar includes a control unit, a receive antenna, and N transmit antennas. The N transmit antennas include a first transmit antenna, a second transmit antenna, and a third transmit antenna. There is a first distance (?x1) between the first transmit antenna and the second transmit antenna, there is a second distance (?x2) between the first transmit antenna (201) and the third transmit antenna (203), and ?x1 is less than ?x2. The second transmit antenna is connected to the control unit by using a first cable (L1), the third transmit antenna is connected to the control unit by using a second cable (L2), a ratio of ?x1 to ?x2 is a first ratio, a ratio of a length of L1 to a length of L2 is a second ratio, and the second ratio is greater than the first ratio.

Abstract: A transmission cable is provided to implement high-speed inter-device interconnection and intercommunication. The transmission cable includes a positive dispersion transmission section, a negative dispersion transmission section, and a dispersion matching section. A cross-sectional diameter of the positive dispersion transmission section is less than a cross-sectional diameter of the negative dispersion transmission section. The dispersion matching section is configured to connect the positive dispersion transmission section and the negative dispersion transmission section. The transmission cable can implement dispersion cancellation to reduce total group delay.

Abstract: A data transmission method and an apparatus are disclosed. The method includes: generating, by a first transmit device, a data frame sequence, where the first data frame sequence includes a first data frame, the first data frame includes a switching interval, the switching interval includes first identification information, and the first data frame corresponds to a first data period; detecting, by the first transmit device, whether a beam adjustment request is received within the first data period, and if the beam adjustment request is received, setting the first identification information in the switching interval of the first data frame to invalid; or if no beam adjustment request is received, setting the first identification information to valid; and sending, by the first transmit device, the first data frame.

Abstract: This application provides a feed apparatus, a dual-band microwave antenna, and a dual-band antenna device. The feed apparatus includes a low-frequency feed and a high-frequency feed. The high-frequency feed is embedded into the low-frequency feed. The low-frequency feed includes a plurality of low-frequency array elements arranged in an array. The high-frequency feed includes a plurality of high-frequency array elements arranged in an array. At least one high-frequency array element is embedded into the low-frequency array element, and the low-frequency array element and each high-frequency array element embedded into the low-frequency array element have a common waveguide wall.

Abstract: The present application discloses a phase adjustment method and apparatus for an antenna array. The method includes: dividing the antenna array into a first antenna subarray and a second antenna subarray according to a first division rule in a preset division rule set; obtaining a phase difference between a first aggregated signal corresponding to the first antenna subarray and a second aggregated signal corresponding to the second antenna subarray; determining a to-be-adjusted phase value of each antenna array element in the antenna array according to the phase difference and a first weighting rule; and sending, to a phase shifter corresponding to each antenna array element, the to-be-adjusted phase value corresponding to the antenna array element.

Abstract: A data transmission method and an apparatus are disclosed. The method includes: generating, by a first transmit device, a data frame sequence, where the first data frame sequence includes a first data frame, the first data frame includes a switching interval, the switching interval includes first identification information, and the first data frame corresponds to a first data period; detecting, by the first transmit device, whether a beam adjustment request is received within the first data period, and if the beam adjustment request is received, setting the first identification information in the switching interval of the first data frame to invalid; or if no beam adjustment request is received, setting the first identification information to valid; and sending, by the first transmit device, the first data frame.

Abstract: This application provides a feed apparatus, a dual-band microwave antenna, and a dual-band antenna device. The feed apparatus includes a low-frequency feed and a high-frequency feed. The high-frequency feed is embedded into the low-frequency feed. The low-frequency feed includes a plurality of low-frequency array elements arranged in an array. The high-frequency feed includes a plurality of high-frequency array elements arranged in an array. At least one high-frequency array element is embedded into the low-frequency array element, and the low-frequency array element and each high-frequency array element embedded into the low-frequency array element have a common waveguide wall.

Abstract: The embodiments of the present invention provide an array antenna beam adjustment device; before combining and analog-digital conversion, the array antenna beam adjustment device couples an N-way reception signal, and performs low-speed small-bandwidth analog-digital conversion on the N-way reception signal; according to the analog-digital converted signal, spatial filtering is performed and a filtering coefficient is adjusted; according to the filtering coefficient, the weight of the reception signal is adjusted, and thus the reception beam is adjusted. In the embodiments of the present invention, beam control is carried out according to the N-way reception signal, and the speed and flexibility of the beam control are greatly improved.

Abstract: The present application discloses a phase adjustment method and apparatus for an antenna array. The method includes: dividing the antenna array into a first antenna subarray and a second antenna subarray according to a first division rule in a preset division rule set; obtaining a phase difference between a first aggregated signal corresponding to the first antenna subarray and a second aggregated signal corresponding to the second antenna subarray; determining a to-be-adjusted phase value of each antenna array element in the antenna array according to the phase difference and a first weighting rule; and sending, to a phase shifter corresponding to each antenna array element, the to-be-adjusted phase value corresponding to the antenna array element.

Abstract: Embodiments of the present invention provide a apparatus. The apparatus includes: N timing phase adjusters, a level calculator, and a first selector, where N is an integer greater than or equal to 2; the timing phase adjuster is configured to perform phase adjustment on a first signal according to a phase adjustment value, to obtain an adjusted first signal, where the first signal is a baseband signal, and the N timing phase adjusters respectively correspond to different phase adjustment values; the level calculator is configured to acquire level fluctuation values, within a preset time, of N adjusted first signals, determine an identifier of an adjusted first signal corresponding to a minimum level fluctuation value, and send the identifier to the first selector; and the first selector is configured to output the adjusted first signal corresponding to the identifier.

Abstract: Embodiments of the present disclosure provide an array antenna and a beam alignment method for an array antenna. The array antenna includes a first subarray, a second subarray, a first power detector, a second power detector, and a decision device, where the first power detector is connected to the first subarray, the second power detector is connected to the second subarray, the decision device is connected to the first power detector, the decision device is connected to the second power detector, and the decision device is configured to determine a first alignment direction of the array antenna according to a power of an output signal of the first subarray and a power of an output signal of the second subarray.

Abstract: Embodiments of the present invention provide a beam alignment method and apparatus. The method includes: communicating with a second device according to a first timeslot structure by sequentially using beams in N directions in a first traversal structure, and obtaining first receive powers when signals transmitted by the second device are received; determining an optimal beam of a first device according to the first receive powers; transmitting signals to the second device according to the first timeslot structure by sequentially using the beams in the N directions in the first traversal structure, and receiving, by using the optimal beam, the signals transmitted by the second device; and when it is determined that the second device determines an optimal beam of the second device, communicating with the second device by using the optimal beam of the first device and by using a second timeslot structure.

Abstract: A delay estimation method for a multiple input multiple output communications system, includes: calculating, by a receiver, a channel response matrix of a Multiple input multiple output MIMO communications system, where there are n transmit channels and m receive channels in the MIMO communications system, n?2, m?2, and the channel response matrix includes channel responses of n*m sub-channels; calculating, by the receiver, an integer delay, relative to a reference sub-channel, of each of the n*m sub-channels according to the channel response matrix, where the reference sub-channel is any sub-channel in the n*m sub-channels; calculating, by the receiver, fraction delays of the n*m sub-channels according to the channel response matrix; and separating out, by the receiver, delays of the m receive channels according to delays of the n*m sub-channels.

Abstract: An antenna alignment method and system, with the system having a first device having NAT transmit beams and NAR receive beams. The system has a second device having NBT transmit beams and NBR receive beams. The first device transmits a signal to the second device according to a first cycle, and traverses switching of NAT transmit beams according to a third beam mode. The second device receives a signal from the first device according to the first cycle, and traverses switching of NBR receive beams according to a fourth beam mode, counts a receive signal power in each first cycle, and obtains a receive signal power corresponding to each receive beam according to the fourth beam mode, to determine that a receive signal power corresponding to an Sth receive beam is the highest, and uses the Sth receive beam as a receive beam.

Abstract: The embodiments of the present invention provide an array antenna beam adjustment device; before combining and analog-digital conversion, the array antenna beam adjustment device couples an N-way reception signal, and performs low-speed small-bandwidth analog-digital conversion on the N-way reception signal; according to the analog-digital converted signal, spatial filtering is performed and a filtering coefficient is adjusted; according to the filtering coefficient, the weight of the reception signal is adjusted, and thus the reception beam is adjusted. In the embodiments of the present invention, beam control is carried out according to the N-way reception signal, and the speed and flexibility of the beam control are greatly improved.

Abstract: An antenna alignment method and system, with the system having a first device having NAT transmit beams and NAR receive beams. The system has a second device having NBT transmit beams and NBR receive beams. The first device transmits a signal to the second device according to a first cycle, and traverses switching of NAT transmit beams according to a third beam mode. The second device receives a signal from the first device according to the first cycle, and traverses switching of NBR receive beams according to a fourth beam mode, counts a receive signal power in each first cycle, and obtains a receive signal power corresponding to each receive beam according to the fourth beam mode, to determine that a receive signal power corresponding to an Sth receive beam is the highest, and uses the Sth receive beam as a receive beam.

Abstract: Embodiments of the present invention provide a apparatus. The apparatus includes: N timing phase adjusters, a level calculator, and a first selector, where N is an integer greater than or equal to 2; the timing phase adjuster is configured to perform phase adjustment on a first signal according to a phase adjustment value, to obtain an adjusted first signal, where the first signal is a baseband signal, and the N timing phase adjusters respectively correspond to different phase adjustment values; the level calculator is configured to acquire level fluctuation values, within a preset time, of N adjusted first signals, determine an identifier of an adjusted first signal corresponding to a minimum level fluctuation value, and send the identifier to the first selector; and the first selector is configured to output the adjusted first signal corresponding to the identifier.

Abstract: Embodiments of the present invention provide a beam alignment method and apparatus. The method includes: communicating with a second device according to a first timeslot structure by sequentially using beams in N directions in a first traversal structure, and obtaining first receive powers when signals transmitted by the second device are received; determining an optimal beam of a first device according to the first receive powers; transmitting signals to the second device according to the first timeslot structure by sequentially using the beams in the N directions in the first traversal structure, and receiving, by using the optimal beam, the signals transmitted by the second device; and when it is determined that the second device determines an optimal beam of the second device, communicating with the second device by using the optimal beam of the first device and by using a second timeslot structure.