PROSE TECHNOLOGIES LLC

A filter includes a filter frame and at least two resonators. A receiving space is formed in the filter frame. The at least two resonators are disposed in the receiving space and distributed along a signal transmission path. Adjacent resonators on the signal transmission path are coupled. Each resonator includes a body part and a bending part. One end of the body part is grounded. The bending part includes a head bending part and an end bending part, the head bending part being connected to the end bending part to form a resonator structure circulating in a counterclockwise or clockwise direction.

A cross-coupled filter includes a minimum resonant structure including four resonators. In the minimum resonant structure, two resonators in the same row form a group, and two resonators in the same row are capacitively mainly coupled or inductively mainly coupled; two resonators in the same column are electrically and magnetically hybrid coupled; and the coupling polarities of the two groups of resonators in the two rows of resonant units are opposite to each other and form at least a cross-coupling. The invention realizes miniaturization and light weight in structural characteristics, and realizes low loss and good harmonic characteristics in electrical performance.

A single-layer cross-coupling filter includes a cavity in which a receiving space is formed; an integrally formed resonant structure installed in the receiving space; and at least one partition wall. The resonant structure includes at least two rows of resonant units distributed along a signal transmission path. The at least two rows of resonant units are located in a same plane of the receiving space, and each row of the resonant units includes a plurality of resonators. The resonators on a same row are coupled and connected to form signal transmission, and at least two adjacent resonators in different rows are coupled and connected to realize cross-coupling.

An optic fiber detection method of a distributed antenna system includes: at a near-end device, sending a test mode switch command to a plurality of relay devices to command the plurality of relay devices to switch to a test mode; and under the test mode: sending a first optical switch control command, the first optical switch control command being used to instruct the plurality of relay devices that have received the first optical switch control command to switch to a group of first optical channels; acquiring optic fiber connection information between the near-end device and the relay devices under all first optical channels of the group of first optical channels; and determining optic fiber connection status of the distributed antenna system according to the optic fiber connection information between the near-end device and the relay devices under all first optical channels and a working mode of the distributed antenna system.

An antenna feed includes a waveguide, a medium support block, and a reflection surface, a smaller end of the medium support block is connected to the waveguide, the reflective surface contacts the inner surface, where the inner surface has at least first, second and third wall segments, where a distance of the second wall segment to the longitudinal axis is greater than a distance of the third wall segment to the longitudinal axis and is smaller than a distance of the first wall segment to the longitudinal axis, where a first angle is defined between the first wall segment and the longitudinal axis, a second angle is defined between the second wall segment and the longitudinal axis, a third angle is defined between the third wall segment and the longitudinal axis, and the second angle is greater than the first angle and greater than the third angle.

A network access device includes: a first signal transceiver port, configured to transmit and receive a first radio frequency signal in a multiple-input-multiple-output manner; a second signal transceiver port, configured to transmit and receive a second radio frequency signal in a single-input-single-output manner; a signal processing unit, configured to filter and to combine and/or split the first radio frequency signal and the second radio frequency signal, the signal processing unit being respectively connected to the first signal transceiver port and the second signal transceiver port; a synchronization unit, configured to demodulate, analyze and modulate the first radio frequency signal and a TDD (Time Division Duplex) switch signal in the second radio frequency signal, the synchronization unit being respectively connected to the first signal transceiver port, the second signal transceiver port, and the signal processing unit.

A 5G distributed system includes a near-end unit, a remote device, and an active antenna unit. The near-end unit transmits signals of multiple modes including 5G signal to the remote device. The remote device performs frequency conversion processing on 5G signal and does not perform frequency conversion processing on signals of other modes, such as 4G, and then outputs to the active antenna unit for coverage. In the present disclosure, the 5G signal is converted by frequency conversion at the remote device, and signals of other modes other than 5G signal are transmitted to the remote active antenna unit without being processed by frequency conversion for signal coverage, which satisfies the coverage requirements of 5G indoor distribution.

A method for transmission compatible with two types of TDD switch signals includes: receiving a downlink TDD switch signal; performing a power-on detection on the downlink TDD switch signal; in response to a successful power-on detection, generating a standard switch signal corresponding to the downlink TDD switch signal; receiving an information of a successful power-on detection and the standard switch signal; comparing the downlink TDD switch signal with the standard switch signal; in response to that a number of abnormal values between the downlink TDD switch signal and the standard switch signal is less than a set value N, outputting a first downlink power switching signal, a first uplink power switching signal, a second downlink power switching signal, and a second uplink power switching signal related to the downlink TDD switch signal.

A cross-coupled filter includes a resonant structure including a plurality of columns of resonant units, each column of resonant units includes at least two resonators. A dominant coupling mode of a coupling between two adjacent resonators in a same column is electrical coupling or magnetic coupling. Dominant coupling modes of a plurality of groups of two adjacent resonators in the same column alternate between electrical coupling and magnetic coupling. A dominant coupling mode of a coupling between two adjacent resonators in adjacent columns is electrical coupling or magnetic coupling. Dominant coupling modes of a plurality of groups of two resonators of two adjacent columns alternate between electrical coupling and magnetic coupling, to form at least a set of cross-coupling. The present disclosure realizes miniaturization and light weight in structural characteristics, and realizes low loss and good harmonic characteristics in electrical performance.

A method for monitoring a distributed antenna system includes: at a relay device, receiving a first operation monitoring signal sent by the near-end device, where the first operation monitoring signal carries an operation monitoring message, and the operation monitoring message includes a device address of a monitoring target device; determining whether to analyze the first operation monitoring signal according to a connection status with the near-end device; in response to a determination to analyze the first operation monitoring message signal, analyzing the first operation monitoring signal to confirm the monitoring target device and to determine whether to respond to the operation monitoring message; and in response to a determination to respond to the operation monitoring message, responding to the operation monitoring message according to the monitoring target device as confirmed.