KR101807395B1 - An wireless video bridge for same throughput between antennas, and a system including the same - Google Patents

An wireless video bridge for same throughput between antennas, and a system including the same Download PDF

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Publication number
KR101807395B1
KR101807395B1 KR1020160031420A KR20160031420A KR101807395B1 KR 101807395 B1 KR101807395 B1 KR 101807395B1 KR 1020160031420 A KR1020160031420 A KR 1020160031420A KR 20160031420 A KR20160031420 A KR 20160031420A KR 101807395 B1 KR101807395 B1 KR 101807395B1
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KR
South Korea
Prior art keywords
wireless video
video bridge
antenna
antennas
bridge
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KR1020160031420A
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Korean (ko)
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KR20170107725A (en
Inventor
성원모
오상만
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주식회사 이엠따블유
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Priority to KR1020160031420A priority Critical patent/KR101807395B1/en
Publication of KR20170107725A publication Critical patent/KR20170107725A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19654—Details concerning communication with a camera
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/59—Responders; Transponders

Abstract

A wireless video bridge for the same throughput between antennas and a system including the same are disclosed. A wireless video bridge according to an exemplary embodiment of the present invention includes a plurality of antennas positioned at predetermined intervals in an outer case of the wireless video bridge, a plurality of antenna ports positioned at predetermined intervals on a PCB of the wireless video bridge, And a plurality of antenna cables for connecting each of the plurality of antenna ports with each of the plurality of antenna cables, wherein each of the plurality of antenna cables includes a positional relationship of the plurality of antennas in the outer case, Each of the plurality of antennas and each of the plurality of antenna ports are mutually cross-mapped based on a positional relationship between the plurality of antenna ports.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless video bridge for equal throughput between antennas, and a system including the wireless video bridge. [0002]

The following embodiments relate to a wireless video bridge for the same throughput between antennas and a system including the same.

Recently, the installation of security cameras is increasing due to crime prevention, surveillance, or information gathering. Conventionally, images photographed by a security camera have been transmitted through a wired network. However, due to difficulties in wired wiring and an increase in installation cost, attempts have been made to transmit through a wireless communication network such as WiFi or LTE.

The existing Wi-Fi is a single input single output (SISO) -based wireless transmission, resulting in the interruption of data transmission due to multipath fading due to the delay of the received signal due to the surrounding environment such as the future, When the data transmission speed is lowered, the degradation of the high-quality image is caused by correspondingly increasing the data compression rate.

In addition, although a patch antenna having a high output is used for a long distance transmission, it is difficult to install a patch antenna because the installation cost is increased and the position and direction of the transmitting and receiving antenna must be considered. There is a problem in that it can not be applied to the remote transmission in the room.

In the case of LTE, there are restrictions on service to be provided through the designated network service provider, the cost of constructing the system for the related service is high, and the user receiving the service has to pay the LTE data fee. This is a burdensome wireless video transmission system.

In order to increase the transmission performance of the photographed image of the security camera, it is necessary to reduce the interference between the antennas and improve the output performance.

Embodiments can provide a technique that can improve the data transmission speed in transmitting a photographed image of a security camera to ensure continuity of surveillance.

In addition, the embodiments can provide a technique for transmitting a photographed image of a security camera outdoors and indoors.

In addition, the embodiments can provide a technique capable of achieving the same throughput with the same channel loss at each antenna.

A wireless video bridge according to an exemplary embodiment of the present invention includes a plurality of antennas positioned at predetermined intervals in an outer case of the wireless video bridge, a plurality of antenna ports positioned at predetermined intervals on a PCB of the wireless video bridge, And a plurality of antenna cables for connecting each of the plurality of antenna ports with each of the plurality of antenna cables, wherein each of the plurality of antenna cables includes a positional relationship of the plurality of antennas in the outer case, Each of the plurality of antennas and each of the plurality of antenna ports may be mutually cross-linked based on a positional relationship of the antenna ports of the first antenna.

Each of the plurality of antenna cables may have the same length.

1A is a front view of a wireless video bridge in accordance with one embodiment.
1B is a side view of a wireless video bridge in accordance with one embodiment.
2 is a schematic block diagram of a wireless video bridge in accordance with one embodiment.
3 is a schematic block diagram of a security camera system in accordance with one embodiment.
4 is a schematic block diagram of the security camera shown in FIG.
5 is a view for explaining a beamforming operation between the first wireless video bridge and the second wireless video bridge shown in FIG.

It is to be understood that the specific structural or functional descriptions of embodiments of the present invention disclosed herein are presented for the purpose of describing embodiments only in accordance with the concepts of the present invention, May be embodied in various forms and are not limited to the embodiments described herein.

Embodiments in accordance with the concepts of the present invention are capable of various modifications and may take various forms, so that the embodiments are illustrated in the drawings and described in detail herein. However, it is not intended to limit the embodiments according to the concepts of the present invention to the specific disclosure forms, but includes changes, equivalents, or alternatives falling within the spirit and scope of the present invention.

The terms first, second, or the like may be used to describe various elements, but the elements should not be limited by the terms. The terms may be named for the purpose of distinguishing one element from another, for example without departing from the scope of the right according to the concept of the present invention, the first element being referred to as the second element, Similarly, the second component may also be referred to as the first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms " comprises ", or " having ", and the like, are used to specify one or more of the features, numbers, steps, operations, elements, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the patent application is not limited or limited by these embodiments. Like reference symbols in the drawings denote like elements.

FIG. 1A is a front view of a wireless video bridge according to one embodiment, FIG. 1B is a side view of a wireless video bridge according to an embodiment, and FIG. 2 is a schematic configuration diagram of a wireless video bridge according to an embodiment.

Referring to FIGS. 1A and 2, the wireless video bridge 100 can transmit / receive image data. The image data may be image data generated from a security camera (not shown).

The wireless video bridge 100 may be a communication device for transmitting / receiving image data generated from a security camera. For example, the wireless video bridge 100 can transmit / receive image data using the IEEE 802.11ac standard.

When the wireless video bridge 100 transmits image data, the wireless video bridge 100 may be connected to a security camera to receive image data generated from a security camera, and may transmit image data to an external receiving device. When the wireless video bridge 100 receives the video data, the wireless video bridge 100 may be connected to the storage device to transmit the video data to the storage device.

The wireless video bridge 100 may include a plurality of antennas 170-1 to 170-4 for a multi input multi output (MIMO) function for increasing a transmission rate or a transmission rate of image data. In addition, the wireless video bridge 100 may perform a beam forming function to transmit image data over a long distance.

Hereinafter, the operation of the wireless video bridge 100 will be described as an example in which the wireless video bridge 100 is connected to a security camera to transmit image data generated by a security camera to an external receiving device.

The wireless video bridge 100 may include an interface 110, a controller 130, an RF chain unit 150, and an antenna unit 170.

The interface 110 may be connected to a security camera. The interface 110 may receive the image data transmitted from the security camera. At this time, the image data may be compressed image data. The interface 110 may be an interface for Ethernet communication between the security camera and the wireless video bridge 100.

The controller 130 may control the overall operation of the wireless video bridge 100.

The controller 130 can modulate the image data. For example, the controller 130 may modulate the image data using a 256-OAM (Quadrature Amplitude Modulation) method. That is, the controller 130 can generate a plurality of subcarriers by adjusting amplitude and phase of the image data through a carrier wave of an in-phase and a quadrature carrier wave. The number of subcarriers is determined by a plurality of RF chains 150-1 to 150-4 included in the RF chain unit 150 and a plurality of antennas 170-1 to 170-4 included in the antenna unit 170, Lt; / RTI > The modulation scheme of the controller 130 is not limited to the 256-OAM (Quadrature Amplitude Modulation) scheme.

The controller 130 may assign a plurality of subcarriers to the RF chain unit 150 and transmit the subcarriers through the antenna unit 170. At this time, the controller 130 controls the RF chain unit 150 to perform the beamforming through the antenna unit 170.

The RF chain unit 150 may include a plurality of RF chains 150-1 to 150-4. Each of the plurality of RF chains 150-1 to 150-4 can receive the allocated subcarrier and amplify the subcarrier.

The antenna unit 170 may include a plurality of antennas 170-1 to 170-4. Each of the plurality of antennas 170-1 to 170-4 may transmit the subcarrier transmitted from each of the corresponding plurality of RF chains 150-1 to 150-4 to an external receiving apparatus.

As shown in FIGS. 1A and 1B, the plurality of antennas 170-1 to 170-4 may be positioned (or disposed) in the outer case 105 of the wireless video bridge 100. FIG. 2, the interface 110, the controller 130, and the RF chain unit 150 excluding the plurality of antennas 170-1 to 170-4 may be implemented on a PCB.

Each of the plurality of antennas 170-1 to 170-4 may be located in the outer case 105 at a predetermined interval D1. Each of the plurality of antennas 170-1 to 170-4 is connected to a corresponding plurality of RF chains 150-1 to 150-4 through corresponding antenna ports P1 to P4 and antenna cables C1 to C4, 4, respectively. That is, the plurality of RF chains 150-1 to 150-4 and the plurality of antennas 170-1 to 170-4 may form one transmission path for sub-carrier transmission.

For example, the first antenna 170-1 may be electrically connected to the first RF chain 150-1 through the first antenna port P1 and the first antenna cable C1. The second antenna 170-2 may be electrically connected to the second RF chain 150-2 through the second antenna port P2 and the second antenna cable C2. The third antenna 170-3 may be electrically connected to the third RF chain 150-3 through the third antenna port P3 and the third antenna cable C3. The fourth antenna 170-4 may be electrically connected to the fourth RF chain 150-4 through the fourth antenna port P4 and the fourth antenna cable C4.

Since each of the plurality of antennas 170-1 to 170-4 is located in the outer case 105 at a predetermined interval D1, interference between antennas is reduced and radiation efficiency can be made efficient.

Each antenna port P1 to P4 may be positioned (or disposed) at a predetermined distance D2 to the PCB.

Each of the plurality of antenna cables C1 to C4 can connect each of the plurality of antennas 170-1 to 170-4 and the plurality of antenna ports P1 to P4. They can be connected so as to mutually cross-correspond. For example, each of the plurality of antenna cables (C1 to C4) may include a positional relationship between the plurality of antennas (170-1 to 170-4) in the outer case (105) and a plurality of antenna ports The plurality of antennas 170-1 to 170-4 and the plurality of antenna ports P1 to P4 may be mutually cross-mapped so as to correspond to each other.

2, the first antenna cable C1 is connected to the first antenna port P1 located closest to the antenna unit 170 located in the outer case 105 from the first antenna port P1 And the first antenna 170-1 located farthest from the first antenna 170-1. Fourth antenna cable C4 The fourth antenna port P4 located farthest from the antenna unit 170 located in the outer case 105 is connected to the fourth antenna 170 located closest to the fourth antenna port P4 -4). ≪ / RTI >

At this time, each of the plurality of antenna cables C1 to C4 may have the same length.

Each of the plurality of antennas 170-1 to 170-4 can output image data (or signal) in the same manner. That is, each of the antennas 170-1 to 170-4 is located in the outer case 105 at a predetermined interval D1, and each of the antenna ports P1 to P4 is also located at a predetermined distance D2 in the PCB, The antennas 170-1 to 170-4 and the antenna ports P1 to P4 are connected to each other through respective antenna cables of the same length so that the antennas 170-1 to 170-4 and the antenna ports P1 to P4 are cross- channel loss, and the same throughput can be achieved.

Although FIGS. 1A and 2 illustrate that the number of the plurality of RF chains 150-1 to 150-4 and the plurality of antennas 170-1 to 170-4 is four, the present invention is not limited thereto. But may be configured in various other numbers.

For convenience of explanation, the operation of each configuration of the wireless video bridge 100 has been described as an example in which the wireless video bridge 100 is connected to the security camera and transmits the image data generated by the security camera to the external receiving device. However, But is not limited thereto. For example, the wireless video bridge 100 may receive a signal transmitted from an external receiving apparatus through each of the RF chains 150-1 to 150-4 and each of the antennas 170-1 to 170-4. At this time, each of the RFs 150-1 to 150-4 may filter the signal of the used frequency band in the received signal propagation, amplify the filtered signal, and transmit the amplified signal to the controller 130.

3 is a schematic block diagram of a security camera system in accordance with one embodiment.

Referring to FIG. 3, the security camera system 200 may include a transmitting apparatus 300 and a receiving apparatus 400.

The transmitting apparatus 300 and the receiving apparatus 400 can communicate with each other through a plurality of channels. At this time, wireless LAN, WiFi, mobile communication network, ZigBee, Bluetooth and the like can be used. WiFi may be an IEEE 802.11ac standard.

The transmitting device 300 may include a security camera 310 and a first wireless video bridge 330. The receiving device 400 may include a second wireless video bridge 410 and a storage device 430. Each of the wireless video bridges 330 and 410 shown in FIG. 3 may be substantially the same as each configuration and operation of the wireless video bridge 100 described with reference to FIGS. 1A and 2.

The security camera 310 is installed at a predetermined position (outdoors or indoors), and can monitor an area at an installed position. The security camera 310 may be capable of adjusting a pan / tilt so as to secure a photographing angle and a photographing field of view. The security camera 310 may be an IP camera or a closed circuit television (CCTV) camera.

The security camera 310 can photograph an area at a location where the security camera 310 is installed and generate image data. The security camera 310 may transmit the photographed image to the first wireless video bridge 330. For example, the security camera 310 may compress the image data and transmit the compressed image data to the first wireless video bridge 330.

The security camera 310 and the first wireless video bridge 330 may be communicatively connected via a LAN (Local Area Network) such as Ethernet. In one example, the first wireless video bridge 330 may be implemented (or located) outside the security camera 310 separately from the security camera 310. In another example, the first wireless video bridge 330 may be implemented integrally with the security camera 310. The first wireless video bridge 330 may be implemented by being built-in to the security camera 310. That is, the first wireless video bridge 330 may be embedded in the security camera 310.

The first wireless video bridge 330 may transmit the image data transmitted from the security camera 310 to the receiving apparatus 400 through beamforming. Specifically, the first wireless video bridge 330 performs a pairing with the second wireless video bridge 410 through a plurality of RF chains and a plurality of antennas included in the first wireless video bridge 330, Video bridges 410 may be communicatively coupled. In this process, the first wireless video bridge 330 can confirm the direction of the second wireless video bridge 410 based on the first wireless video bridge 330. [ Then, the first wireless video bridge 330 is connected to a plurality of RF chains (not shown) so that the direction connecting the points at which the beam patterns transmitted from the plurality of antennas are commonly intersected is directed toward the second wireless video bridge 410. [ It is possible to vary the phase of the subcarrier allocated to each of them. In addition, the first wireless video bridge 330 may amplify the size of the beam patterns transmitted from the plurality of antennas.

The second wireless video bridge 410 may receive the image data transmitted from the first wireless video bridge 330. For example, the second wireless video bridge 410 may receive video data using the IEEE 802.11ac standard.

In addition, the second wireless video bridge 410 may perform bidirectional communication with the first wireless video bridge 330. The second wireless video bridge 410 may transmit a signal associated with the transmitting device 300 to the transmitting device 300. [ Signals associated with the transmitting device 300 may include signals (or data) for at least one of the transmitting device 300, e.g., the security camera 310 and the first wireless video bridge 330, and a control Signal.

The second wireless video bridge 410 may transmit the image data transmitted from the transmission device 300 to the storage device 430. At this time, the storage device 430 and the second wireless video bridge 410 may be communicably connected through a LAN (Local Area Network) such as Ethernet. In one example, the second wireless video bridge 410 may be implemented (or located) outside of the storage device 430 separately from the storage device 430. As another example, the second wireless video bridge 410 may be implemented integrally with the storage device 430. The second wireless video bridge 410 may be implemented by being built-in to the storage device 430. That is, the second wireless video bridge 410 may be embedded in the storage device 430.

The storage device 430 may store the image data transmitted from the transmission device 300. Storage device 430 may include local storage such as DAS (Direct Attached Storage), network storage such as NAS (Network Attached Storage) or SAN (Storage Area Network), and cloud storage, . For example, the storage device 430 may be a NVR (Network Video Recorder) or a DVR (Digital Video Recorder).

The storage device 430 may be connected to a display device (not shown) implemented outside the receiving device 400. The image data stored in the storage device 430 may be displayed through a display device.

The display device may be implemented as a personal computer (PC), a data server, or a portable device. Portable devices include laptop computers, mobile phones, smart phones, tablet PCs, mobile internet devices (MIDs), personal digital assistants (PDAs), enterprise digital assistants (EDAs) A digital still camera, a digital video camera, a portable multimedia player (PMP), a personal navigation device or a portable navigation device (PND), a handheld game console, an e-book e-book, and smart device. For example, a smart device can be implemented as a smart watch or a smart band.

4 is a schematic block diagram of the security camera shown in FIG.

4, the security camera 310 may include a lens unit 311, an image sensor 313, a signal processing unit 315, a compression unit 317, and an interface 319.

The lens unit 311 can project the image of the front of the lens unit 311 by the image sensor 313 mounted on the rear side of the lens unit 311 by collecting the light.

The image sensor 313 can generate an analog signal corresponding to the image projected from the lens unit 311, and can convert the analog signal into a digital signal. For example, the image sensor 313 may convert an analog signal into a digital signal such as a Low Voltage Complementary Metal Oxide Semiconductor (LVCMOS), a Low Voltage Differential Signaling (LVDS), or a Mobile Industry Processor Interface (MIPI).

The signal processing unit 315 can process a digital signal as a video signal. For example, the signal processing unit 315 can perform image signal processing such as AE (Auto Exposure), AF (Auto Focus), and AWB (Auto White Balance) on a digital signal.

In addition, the signal processing unit 315 can convert the digital signal processed by the video signal into video data, for example, video format data. For example, the signal processing unit 315 can convert a digital signal processed by a video signal into YUV video format data.

The compression unit 317 compresses the image data using standards such as Moving Picture Experts Group 4 (MPEG 4), High Efficiency Video Coding (HEVC), and H.264, and transmits the compressed image data to the interface 319 .

The interface 319 may be connected to the first wireless video bridge 330. The interface 319 may transmit the compressed video data to the first wireless video bridge 330.

The interface 319 may be an interface for an Ethernet communication between the security camera 310 and the first wireless video bridge 330. The interface 319 may be electrically connected to the first wireless video bridge 330 via a network cable.

Herein, the security camera 310 compresses the captured image and transmits the compressed image to the first wireless video bridge 330. However, the present invention is not limited to this, and the first wireless video bridge 330 may transmit the image data Can be compressed.

5 is a view for explaining a beamforming operation between the first wireless video bridge and the second wireless video bridge shown in FIG.

Referring to FIG. 5, the first wireless video bridge 330 and the second wireless video bridge 410 may be connected to each other to perform mutual communication by performing a pairing. At this time, the plurality of antennas of the first wireless video bridge 330 and the plurality of antennas of the second wireless video bridge 410 may form beam patterns.

The first wireless video bridge 330 can confirm in which direction the second wireless video bridge 410 is positioned based on the first wireless video bridge 330. [ The first wireless video bridge 330 then transmits the beam patterns of the first wireless video bridge 330 to the second wireless video bridge 330 so that the direction connecting the points where the beam patterns of the first wireless video bridge 330 are commonly overlapped is directed to the direction of the second wireless video bridge 410. [ It is possible to amplify the beam patterns while changing the direction (for example, changing the phase of the subcarrier).

The second wireless video bridge 410 may also operate as the first wireless video bridge 330.

In the first wireless video bridge 330, the output of the beam patterns increases toward the direction of the second wireless video bridge 410. In the second wireless video bridge 410, the direction of the first wireless video bridge 330 The output of the beam patterns can be increased. Accordingly, the image data transmitted from the security camera 310 may be transmitted over a long distance.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA) , A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (2)

In a wireless video bridge,
A plurality of antennas located at a predetermined interval in an outer case of the wireless video bridge;
A plurality of antenna ports positioned at predetermined intervals on a PCB of the wireless video bridge; And
A plurality of antenna cables for connecting each of the plurality of antennas and the plurality of antenna ports mutually crossing each other;
/ RTI >
Each of the plurality of antenna cables includes:
A first antenna port positioned closest to the plurality of antennas based on a positional relationship between the plurality of antennas in the outer case and a positional relationship between the plurality of antenna ports on the PCB, And a second antenna port located farthest from the plurality of antennas is connected so as to mutually cross-correspond to an antenna positioned closest to the second antenna port
Wireless video bridge.
The method according to claim 1,
Each of the plurality of antenna cables being of the same length.
KR1020160031420A 2016-03-16 2016-03-16 An wireless video bridge for same throughput between antennas, and a system including the same KR101807395B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101240438B1 (en) * 2008-05-21 2013-03-11 알카텔-루센트 유에스에이 인코포레이티드 Calibrating radiofrequency paths of a phased-array antenna

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101240438B1 (en) * 2008-05-21 2013-03-11 알카텔-루센트 유에스에이 인코포레이티드 Calibrating radiofrequency paths of a phased-array antenna

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