Abstract: The present disclosure relates to a distributed antenna monitoring apparatus for monitoring antennas of a distributed antenna system (DAS) installed in a building in a public safety radio network, and a method therefor.

Abstract: This embodiment discloses a dual-band signal booster for a public safety radio network. The signal booster disclosed herein performs a low-noise amplification and a frequency down/up conversion on a radio frequency signal received from a donor antenna, amplifies the amplified and converted signal to a high-power level, and transmits the amplified signal to a service antenna. Further, the signal booster disclosed herein performs the low-noise amplification and the frequency down/up conversion on a radio frequency signal received from the service antenna, amplifies the amplified and converted signal to a high-power level, and transmits the amplified signal to the donor antenna. According to this embodiment, it is possible to simultaneously service a plurality of channels to increase a communication capacity.

Abstract: A filter including a resonator formed of metal and including a first through hole in one direction, and a transmission line penetrating through the first through hole, wherein the transmission line is spaced apart from the first through hole.

Abstract: A modular PIM analyzer includes: a first signal amplification module provided with a first signal generator for generating a first frequency signal under control of a first MCU, and a first power amplifier for generating a first amplified frequency signal through the amplification of the first frequency signal under control of a first ALC circuit; a second signal amplification module provided with a second signal generator for generating a second frequency signal under control of a second MCU, and a second power amplifier for generating a second amplified frequency signal through the amplification of the second frequency signal under control of a second ALC circuit; and a triplexer module for extracting a test frequency signal using the first amplified frequency signal and the second amplified frequency signal, transmitting the test frequency signal to a device under test, and receiving a PIM signal being reflected from the device under test

Abstract: A modular PIM analyzer includes: a first signal amplification module provided with a first signal generator for generating a first frequency signal under control of a first MCU, and a first power amplifier for generating a first amplified frequency signal through the amplification of the first frequency signal under control of a first ALC circuit; a second signal amplification module provided with a second signal generator for generating a second frequency signal under control of a second MCU, and a second power amplifier for generating a second amplified frequency signal through the amplification of the second frequency signal under control of a second ALC circuit; and a triplexer module for extracting a test frequency signal using the first amplified frequency signal and the second amplified frequency signal, transmitting the test frequency signal to a device under test, and receiving a PIM signal being reflected from the device under test.

Abstract: A connector, which is coupled to a first communication component, including: a connector body; a fitting portion, which is formed on one end of the connector body, configured to fix the connector body by being adhered to a wall of the first communication component; and a ground stabilization member coupled to the connector body and the first communication component, wherein the ground stabilization member includes: a fixing portion configured to fix the ground stabilization member to an inner wall of the connector body; an insertion portion inserted in an insertion hole of the first communication component, wherein a plurality of slots imparting elasticity are formed; and a ground contact portion configured to perform a grounding function by contacting an inner wall of the insertion hole due to the elasticity.

Abstract: A connector, which is coupled to a first communication component, including: a connector body; a fitting portion, which is formed on one end of the connector body, configured to fix the connector body by being adhered to a wall of the first communication component; and a ground stabilization member coupled to the connector body and the first communication component, wherein the ground stabilization member includes: a fixing portion configured to fix the ground stabilization member to an inner wall of the connector body; an insertion portion inserted in an insertion hole of the first communication component, wherein a plurality of slots imparting elasticity are formed; and a ground contact portion configured to perform a grounding function by contacting an inner wall of the insertion hole due to the elasticity.

Abstract: A filter including a resonator formed of metal and including a first through hole in one direction, and a transmission line penetrating through the first through hole, wherein the transmission line is spaced apart from the first through hole.

Abstract: A duplexer includes a plurality of first resonators disposed along the transmission path of the transmitting signal; a plurality of second resonators disposed along the transmission path of the receiving signal; and a combining panel having an overlapped area between one of the plurality of first resonators which is disposed closest to an antenna and one of the plurality of second resonators which is disposed closest to the antenna, wherein each of said first resonators and said second resonators includes: a body comprised of dielectric material, and formed with a through hole penetrating unidirectionally, and a conducting layer formed on the cross-section of at least one side of the cross-sections of the both sides along the lengthwise direction of said body, and the surface of the wall of said through hole.

Abstract: A multiplexer including a housing including an antenna connector coupled to an antenna and a plurality of input and output connectors configured to receive or output a signal transmitted or received via the antenna according to a predetermined frequency band; a plurality of band pass filter units included in the housing and configured to pass a signal of a predetermined frequency band between the antenna connector and the plurality of input and output connectors; and a coupling unit including a plurality of feeding units to couple the antenna connector and the plurality of band pass filter units with one another.

Abstract: A resonator and a filter including the same are provided. The resonator includes a body formed of a dielectric material and including a through-hole formed in one direction, and a conductive film coupled to at least one of both side cross-sections of the body in a lengthwise direction and a wall surface of the through-hole.

Abstract: A resonance device and a filter including the same are provided. The resonance device includes a case having a first ground surface and a second ground surface which are facing each other, and a first conductive layer located in the case, and the first conductive layer includes a main part grounded via the first ground surface, and a protruding part which has a width different from that of the main part and is located to be spaced apart from the second ground surface.

Abstract: A resonance device is disclosed. The resonance device in accordance with an embodiment of the present invention includes: a case including a first ground surface and a second ground surface which face each other; a stacked part formed inside the case by stacking a first conductive layer and a second conductive layer, wherein the first conductive layer is grounded to the first ground surface and the second conductive layer is separated from the first conductive layer without being grounded to the first ground surface; and a transmission layer connecting the second conductive layer to the second ground surface.

Abstract: A multi-band filter is disclosed. The multi-band filter includes: a housing including an antenna connector connected to an antenna and a plurality of input/output connectors inputting/outputting signals transmitted and received through the antenna depending on a preset frequency band; a plurality of band pass filter units provided in the housing and passing the signals in the preset frequency band therethrough between the antenna connector and the input/output connectors; and a coupling unit including a plurality of feeding parts so as to couple the antenna connector and each of the plurality of band pass filter units to each other.

Abstract: A filter package includes a substrate, a plurality of resonators each coupled to the substrate, and a metal circuit pattern patterned on the substrate, and the plurality of resonators each include a body made of a dielectric material, in which a through hole is formed in one direction, and a conductive film attached to an end surface coupled to the substrate among both end surfaces of the body, and attached to a wall of the through hole.

Abstract: A resonance device including a plurality of resonators arranged in a state of being spaced apart from each other; and a notch resonator formed above the plurality of resonators, wherein the notch resonator includes: a transverse layer having an area overlapping with at least three resonators of the plurality of resonators; and a plurality of short-ended layers connecting the transverse layer to a first ground surface.

Abstract: A duplexer includes a plurality of first resonators disposed along the transmission path of the transmitting signal; a plurality of second resonators disposed along the transmission path of the receiving signal; and a combining panel having an overlapped area between one of the plurality of first resonators which is disposed closest to an antenna and one of the plurality of second resonators which is disposed closest to the antenna, wherein each of said first resonators and said second resonators includes: a body comprised of dielectric material, and formed with a through hole penetrating unidirectionally, and a conducting layer formed on the cross-section of at least one side of the cross-sections of the both sides along the lengthwise direction of said body, and the surface of the wall of said through hole.

Abstract: A multiplexer with a common port feeding structure is disclosed. The multiplexer with a common port feeding structure of the present invention comprises: a housing comprising an antenna connector connected to an antenna for bidirectional transmitting and receiving and a plurality of input/output connectors bidirectionally inputting and outputting a specific frequency band of wireless signals which are input/output through the antenna; a plurality of band-pass filter units mounted inside the housing to transmit wireless signals at between the antenna connector and the input/output connector to pass a specific frequency band; and a coupling unit having a plurality of feeding members to couple the antenna connector and each of the plurality of band-pass filter units.

Abstract: Discloses are a transmission line having variable characteristic impedance and a combiner configured to combine a plurality of filter by use of the transmission line. The transmission line in accordance with an embodiment of the present invention includes: a first filter junction being connected with a first RF filter and configured to obtain an output signal of the first RF filter; a second filter junction being connected with a second RF filter and configured to obtain an output signal of the second RF filter; a first variable impedance section in which a phase of the output signal of the first RF filter is matched with a preset phase; and a second variable impedance section in which a phase of the output signal of the second RF filter is matched with the preset phase.

Abstract: A resonance device including a plurality of signal input/output ports, further including: a plurality of resonators arranged in a state of being spaced apart from each other; and a notch resonator formed at a side of the plurality of resonators, wherein the notch resonator includes: a laminated part having a laminated structure formed by layering a plurality of conductive layers; a first transmitting layer connected to one of the plurality of conductive layers; and a bridge connected between the first transmitting layer and one of the plurality of resonators, wherein one of the plurality of signal input/output ports is connected to the bridge.