KR102579396B1 - Reverberation chamber - Google Patents

Abstract

The present invention relates to an electromagnetic wave reverberation room. The electromagnetic wave reverberation room is a shielding space for allowing electromagnetic wave signals to enter at a uniform size using a column-type mode stirrer, a wall-type mode stirrer, and an antenna disposed inside the electromagnetic wave reverberation room. provides.

Description

Electromagnetic wave reverberation chamber {REVERBERATION CHAMBER}

The present invention relates to an electromagnetic wave reverberation room, and more specifically, to a measurement space that forms a measurement environment similar to the propagation environment of electromagnetic waves so that electromagnetic waves can be evenly distributed within the electromagnetic wave reverberation room.

An electromagnetic wave reverberation room is a measurement facility designed to enable multiple reflections of electromagnetic waves based on an electromagnetic shielding room. The electromagnetic wave reverberation chamber is made of metal for multiple reflections of electromagnetic waves, and a mode stirrer, etc. is used to create a uniform field at a specific location.

In other words, an electromagnetic wave reverberation room is a measurement facility used to measure the radiation performance and electromagnetic compatibility (EMC) characteristics of various electronic devices. The electromagnetic wave reverberation chamber creates a measurement environment similar to the actual electromagnetic wave propagation environment because signals of various polarization waves can be incident at a uniform size into the working volume, which is a rectangular space within the electromagnetic wave reverberation chamber where the measurement object can be raised.

The electromagnetic wave reverberation room is regulated by specific specifications of international standards, and multiple modes can be generated inside the reverberation room through a mode stirrer. In other words, an excellent electromagnetic wave reverberation chamber can be designed depending on the shape of the mode stirrer disposed in the reverberation chamber. In designing an electromagnetic wave reverberation room, specific specifications of international standards suggest the standard deviation calculated from the electric fields measured at eight vertices of the working volume, and as the basic performance of the electromagnetic wave reverberation room, the standard deviation is calculated in the measurement frequency range. It is recommended to be below 3 dB.

The performance recommended by international standards has the advantage of being able to test a variety of devices under test because when the working volume increases, the space where the measurement object can be placed expands. Additionally, the size of the electromagnetic wave reverberation room expands the working volume as the size of the space increases.

However, because the size of the electromagnetic wave reverberation chamber is limited in space, the size of the electromagnetic wave reverberation chamber cannot be infinitely expanded. In addition, the standard deviation measured at the eight vertices of the working volume is the difference between the measured values at each measurement position, so the smaller this value, the smaller the deviation in the size of the incident wave transmitted to the device under test.

Therefore, a technology to expand the working volume in a limited space through a mode stirrer, etc. and a technology to uniformly transmit an incident wave of the desired size to the device under test considering the immunity of electromagnetic waves in the electromagnetic wave reverberation room are needed.

The present invention provides an electromagnetic wave reverberation chamber having a column-type mode stirrer and a wall-type mode stirrer, thereby improving the uniformity of electromagnetic waves by lowering the standard deviation of the working volume of the electromagnetic wave reverberation chamber.

The present invention provides a miniaturized, high-performance electromagnetic wave reverberation chamber that can reduce the size of a limited electromagnetic wave reverberation chamber using a column-type mode stirrer and a wall-type mode stirrer.

The present invention provides an electromagnetic wave reverberation chamber that can more efficiently utilize the measurement space for electromagnetic waves in the electromagnetic wave reverberation chamber by providing not only a column-type mode stirrer but also a small, wall-type mode stirrer that can be attached to the wall. .

An electromagnetic wave reverberation chamber according to an embodiment includes a column-type mode stirrer in which a plurality of 'Z' shaped unit panels are combined; A wall-type mode stirrer with a plurality of 'W' shaped unit panels combined; and an antenna that generates electromagnetic waves in the direction in which the wall mode stirrer is installed, and the column mode stirrer and the wall mode stirrer are arranged not to overlap each other in the electromagnetic wave reverberation chamber, and may have a structure for scattering the electromagnetic waves. .

The 'Z' shaped unit panel according to one embodiment may include a first panel that is horizontal to the floor of the electromagnetic wave reverberation chamber and a second panel that is configured at a specific angle from the bottom of the electromagnetic wave reverberation chamber.

The second panel according to one embodiment may be configured at different angles depending on the electromagnetic waves available inside the electromagnetic wave reverberation chamber in order to uniformly form a field distribution of electromagnetic waves.

The wall-type mode stirrer according to one embodiment is installed on the wall of the electromagnetic wave reverberation chamber, and can rotate based on the central axis of the wall-type mode stirrer.

The wall-type mode stirrer according to one embodiment can directly scatter electromagnetic waves generated from the antenna.

A 'W' shaped unit panel according to one embodiment may include a first panel and a second panel arranged to face each other at the same angle.

The electromagnetic wave reverberation room according to one embodiment has the shape of a polyhedron and may be a shielding space that adjusts the reflection characteristics of electromagnetic waves.

According to an embodiment of the present invention, the electromagnetic wave reverberation chamber provides an electromagnetic wave reverberation chamber having a column-type mode stirrer and a wall-type mode stirrer, thereby lowering the standard deviation of the working volume of the electromagnetic wave reverberation chamber and improving the uniformity of electromagnetic waves. .

According to one embodiment of the present invention, the electromagnetic wave reverberation chamber can be provided in a miniaturized, high-performance form that can reduce the size of the limited electromagnetic wave reverberation chamber using a column-type mode stirrer and a wall-type mode stirrer.

According to an embodiment of the present invention, the electromagnetic wave reverberation chamber provides not only a column-type mode stirrer, but also a small, wall-type mode stirrer that can be attached to the wall, thereby improving the measurement space for electromagnetic waves in the electromagnetic wave reverberation chamber more efficiently. You can utilize it.

1 is a structural diagram of an electromagnetic wave reverberation chamber according to an embodiment of the present invention.
Figure 2 is a structural diagram showing the internal shape of an electromagnetic wave reverberation chamber according to an embodiment of the present invention.
Figure 3 is a standard deviation graph for the working volume of an electromagnetic wave reverberation chamber using a column-type mode stirrer and a wall-type mode stirrer according to an embodiment of the present invention.
Figure 4 is a standard deviation graph for the working volume of an electromagnetic wave reverberation room using a column-type mode stirrer according to an embodiment of the present invention.
Figure 5 is a standard deviation graph for the working volume of an electromagnetic wave reverberation room using a wall-type mode stirrer according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

1 is a structural diagram of an electromagnetic wave reverberation chamber according to an embodiment of the present invention.

Referring to FIG. 1, the electromagnetic wave reverberation chamber 101 reflects all electromagnetic waves within the reverberation chamber, and the reflected electromagnetic waves create a working volume where electromagnetic waves are uniform in a specific space, and in this area, various electronic devices This is a facility that can measure electromagnetic characteristics.

The walls, ceiling, and floor of the electromagnetic wave reverberation room 101 may be made of a highly conductive metal material to ensure good reflection of electromagnetic waves. The electromagnetic wave reverberation room 101 can implement electromagnetic waves incident in various directions in the measurement area due to the multi-reflection effect of electromagnetic waves, thereby realizing an actual electromagnetic wave environment.

Here, the electromagnetic wave reverberation room 101 exists in a space where electromagnetic waves are evenly distributed due to the multiple reflection effects of electromagnetic waves and the generation of multiple modes, and is called a working volume. In other words, working volume is the concept of space where the degree of distribution of electromagnetic waves can be measured.

Therefore, the electromagnetic wave reverberation chamber 101 proposed in the present invention may include a column-type mode stirrer 102, a wall-type mode stirrer 103, and an antenna 104 within the reverberation chamber. In detail, the electromagnetic wave reverberation chamber 101 has the shape of a polyhedron and can control the reflection characteristics of electromagnetic waves. The column mode stirrer 102 may be implemented as a combination of a plurality of 'Z' shaped unit panels. The wall mode stirrer 103 may be implemented as a combination of a plurality of 'W' shaped unit panels. Additionally, the antenna 104 can generate electromagnetic waves in the direction where the wall-type mode stirrer 104 is installed.

The column-type mode stirrer 102 and the wall-type mode stirrer 103 are arranged not to overlap each other in the electromagnetic wave reverberation chamber 101 and may have a structure for scattering electromagnetic waves.

At this time, the electromagnetic wave reverberation room 101 uses not only the column-type mode stirrer 102 but also the wall-type mode stirrer 103 that can be attached to the wall, thereby lowering the standard deviation of the working volume of the reverberation room. The field uniformity of the frequency irradiation area within the reverberation room can be improved.

More specifically, the electromagnetic wave shielding room may have a unique mode determined depending on the structure of the shielding room. Here, the mode may refer to the shape in which energy is distributed. Accordingly, once the structure of the electromagnetic wave shielding room is determined, the distribution of electromagnetic waves within the structure is also constant. On the other hand, an electromagnetic wave reverberation room may be a facility that can create a uniform field in a specific space by structurally changing the modes of the electromagnetic wave shielding room through a mode stirrer to generate various types.

The present invention can spread electromagnetic waves using a mode stirrer placed in an electromagnetic wave reverberation chamber. In other words, from the perspective of electromagnetic wave reflection, when the present invention uses a mode stirrer, the mode stirrer rotates, so the electromagnetic waves generated from the transmission antenna are reflected by the mode stirrer, thereby spreading the electromagnetic waves. At this time, in the present invention, the more diverse the shape and number of mode stirrers are, the higher the probability of good diffusion. If diffusion (reflection) is good, the reflection path of electromagnetic waves can be diversified. In addition, the present invention can reduce the deviation of electromagnetic waves within the working volume as the reflection paths of electromagnetic waves become more diverse.

Based on this, the electromagnetic wave reverberation room 101 lowers the standard deviation of the work space of the reverberation room in response to the size of the electromagnetic wave reverberation room, so that when the electromagnetic wave reverberation room is designed based on the conventional standard, the work space is larger than the conventional work space. can be provided. Additionally, the size of the electromagnetic wave reverberation chamber 101 can be reduced when the size of the reverberation chamber's work space is fixed. Through this, the electromagnetic wave reverberation chamber 101 proposed in the present invention can be implemented as a high-performance electromagnetic wave reverberation chamber that is more compact than the conventional electromagnetic wave reverberation chamber.

In addition, the electromagnetic wave reverberation room 101 proposed in the present invention provides not only the conventional column-shaped mode stirrer 102, but also a miniaturized mode stirrer 103 that can be attached to the wall, thereby reducing the measurement space in the electromagnetic wave reverberation room. It can be used more efficiently.

Figure 2 is a structural diagram showing the internal shape of an electromagnetic wave reverberation chamber according to an embodiment of the present invention.

Referring to FIG. 2, the electromagnetic wave reverberation chamber 201 may include a column-type mode stirrer 202, a wall-type mode stirrer 203, and an antenna 204 made of metal within a rectangular reverberation chamber structure.

The column-type mode stirrer 202 may be composed of a plurality of 'Z' shaped unit panels to form one complete form. Here, the column-shaped mode stirrer 202 may be formed in the space of the electromagnetic wave reverberation chamber 201 in a vertical direction perpendicular to the direction of the earth's gravity. The 'Z' shaped unit panel may include a first panel that is horizontal to the floor of the electromagnetic wave reverberation chamber and a second panel that is formed at a specific angle from the bottom of the electromagnetic wave reverberation chamber.

For example, the column-type mode stirrer 202 consists of one completed mode stirrer, and in the case of the unit panel, it consists of two panels: a first panel that is horizontal to the floor and a second panel that is bent at a specific angle from the floor surface. It is done.

The second panel may be configured at different angles depending on the electromagnetic waves available inside the electromagnetic wave reverberation chamber in order to uniformly form a field distribution of electromagnetic waves. In other words, the angle of each unit panel of the second panel can be selected differently to improve performance. Electromagnetic waves generated by the antenna (transmitting antenna) may be reflected through the mode stirrer. Whether or not electromagnetic waves are reflected from a metal reflector can be determined depending on the frequency and the length of the wavelength. Basically, wavelength means length, and since the size of the mode stirrer can vary depending on the angle in the mode stirrer, the present invention can configure the second panel at different angles depending on the frequency.

In addition, the horizontal and vertical sizes of the 'Z' shaped unit panel can be designed in various sizes depending on the frequencies present in the reverberation room, and the size of each panel can be selected to be the same or different.

The wall-type mode stirrer 203 may be composed of a plurality of 'W' shaped unit panels to form one complete form. In the case of the wall-type mode stirrer 203, the wall-type mode stirrer 203 may be located at a point where the antenna 204 that generates a signal faces.

At this time, the horizontal size, vertical size, and size of detailed elements of the 'W' shaped unit panel can be designed in various sizes depending on the frequency. Here, the detailed element is the internal length of the W-type mode stirrer, and may refer to the length that constitutes one wing (panel) in the W-type. At this time, the wall-type mode stirrer 203 can directly scatter electromagnetic waves generated from the antenna.

In addition, the wall mode stirrer 203 is designed in a ‘W’ shape to scatter more electromagnetic waves, and can rotate based on the central axis of the wall mode stirrer. Here, the wall mode stirrer 203 can be rotated by connecting the stirrer and an external motor in the form of a metal rod at the center of the wall mode stirrer.

In the case of a conventional electromagnetic wave reverberation chamber, two or more mode stirrers are usually present for each axis, and an area for the mode stirrer to operate is required. However, the wall-type mode stirrer 204 presented in the present invention operates with the mode stirrer attached to the wall, so the space occupied by the stirrer is reduced, allowing efficient use of the space in the electromagnetic wave reverberation room.

Figure 3 is a standard deviation graph for the work space of an electromagnetic wave reverberation chamber using a column-type mode stirrer and a wall-type mode stirrer according to an embodiment of the present invention.

In the present invention, the size of the electromagnetic wave reverberation chamber is 1.9 m x 1.4 m x 2 m, the size of the column mode stirrer is 0.5 m x 0.5 m, and a panel was designed in which the angle of the second panel increases from 30 degrees to 45 degrees. In addition, the size of the wall mode stirrer was 0.7 m x 0.7 m, and the detailed elements were designed as a panel bent at a 45 degree angle.

The graph in Figure 3 is a graph showing the standard deviation in the working volume consisting of points 1 to 8 in an electromagnetic wave reverberation room using a column-type mode stirrer and a wall-type mode stirrer. The working volume set in the present invention may occupy about 15% of the space compared to the external size of the electromagnetic wave reverberation room.

The present invention improves the standard deviation characteristics of the working volume when using the electromagnetic wave reverberation indoor column mode stirrer and the wall mode stirrer at the same time, and has a standard deviation characteristic (about 2.5 dB) lower than the recommended specification of the international standard of 3 dB. Since it has a , the performance of the electromagnetic wave reverberation room can be improved by improving the uniformity within the working volume.

Figure 4 is a standard deviation graph for the work space of an electromagnetic wave reverberation chamber using a column-type mode stirrer according to an embodiment of the present invention.

In the present invention, the size of the electromagnetic wave reverberation chamber is 1.9 m x 1.4 m x 2 m, the size of the column mode stirrer is 0.5 m x 0.5 m, and a panel was designed in which the angle of the second panel increases from 30 degrees to 45 degrees. The graph in FIG. 4 may be a result showing the standard deviation characteristics of the working volume in the electromagnetic wave reverberation chamber using a column-mode stirrer.

Figure 5 is a standard deviation graph for the work space of an electromagnetic wave reverberation room using a wall-type mode stirrer according to an embodiment of the present invention.

In the present invention, the size of the electromagnetic wave reverberation chamber is 1.9 m x 1.4 m x 2 m, the size of the wall mode stirrer is 0.7 m x 0.7 m, and the detailed elements are designed as a panel bent at a 45 degree angle. The graph in FIG. 5 may be a result showing the standard deviation characteristics of the working volume in an electromagnetic wave reverberation room using a wall-type mode stirrer.

Implementations of the various techniques described herein may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or combinations thereof. Implementations may include a computer program product, i.e., an information carrier, e.g., machine-readable storage, for processing by or controlling the operation of a data processing device, e.g., a programmable processor, a computer, or multiple computers. It may be implemented as a computer program recorded on a device (computer-readable medium). Computer programs, such as the computer program(s) described above, may be written in any form of programming language, including compiled or interpreted languages, and may be written as a stand-alone program or as a module, component, subroutine, or part of a computing environment. It can be deployed in any form, including as other units suitable for use. The computer program may be deployed for processing on one computer or multiple computers at one site or distributed across multiple sites and interconnected by a communications network.

Processors suitable for processing computer programs include, by way of example, both general-purpose and special-purpose microprocessors, and any one or more processors of any type of digital computer. Typically, a processor will receive instructions and data from read-only memory or random access memory, or both. Elements of a computer may include at least one processor that executes instructions and one or more memory devices that store instructions and data. Generally, a computer may include one or more mass storage devices that store data, such as magnetic, magneto-optical disks, or optical disks, receive data from, transmit data to, or both. It can also be combined to make . Information carriers suitable for embodying computer program instructions and data include, for example, semiconductor memory devices, magnetic media such as hard disks, floppy disks, and magnetic tapes, and Compact Disk Read Only Memory (CD-ROM). ), optical recording media such as DVD (Digital Video Disk), magneto-optical media such as Floptical Disk, ROM (Read Only Memory), RAM , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), and EEPROM (Electrically Erasable Programmable ROM). The processor and memory may be supplemented by or included in special purpose logic circuitry.

Additionally, computer-readable media can be any available media that can be accessed by a computer, and can include both computer storage media and transmission media.

Although this specification contains details of numerous specific implementations, these should not be construed as limitations on the scope of any invention or what may be claimed, but rather as descriptions of features that may be unique to particular embodiments of particular inventions. It must be understood. Certain features described herein in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination. Furthermore, although features may be described as operating in a particular combination and initially claimed as such, one or more features from a claimed combination may in some cases be excluded from that combination, and the claimed combination may be a sub-combination. It can be changed to a variant of a sub-combination.

Likewise, although operations are depicted in the drawings in a particular order, this should not be construed as requiring that those operations be performed in the specific order or sequential order shown or that all of the depicted operations must be performed to obtain desirable results. In certain cases, multitasking and parallel processing may be advantageous. Additionally, the separation of various device components in the above-described embodiments should not be construed as requiring such separation in all embodiments, and the described program components and devices may generally be integrated together into a single software product or packaged into multiple software products. You must understand that it is possible.

Meanwhile, the embodiments of the present invention disclosed in the specification and drawings are merely provided as specific examples to aid understanding, and are not intended to limit the scope of the present invention. It is obvious to those skilled in the art that in addition to the embodiments disclosed herein, other modifications based on the technical idea of the present invention can be implemented.

101: Electromagnetic wave reverberation room
102: Column mode stirrer
103: Wall mode stirrer
104: antenna

Claims (7)

In the electromagnetic wave reverberation room,
A wall-type mode stirrer with a plurality of 'W' shaped unit panels combined; and
Antenna that generates electromagnetic waves in the direction where the wall mode stirrer is installed
Including,
The wall mode stirrer,
It is installed on the wall of the electromagnetic wave reverberation chamber and rotates about the central axis of the wall-type mode stirrer,
The wall mode stirrer,
An electromagnetic wave reverberation chamber having a structure for scattering the electromagnetic waves. According to paragraph 1,
Column mode stirrer with multiple 'Z' shaped unit panels combined
It further includes,
The 'Z' shaped unit panel is,
An electromagnetic wave reverberation room including a first panel that is horizontal to the floor of the electromagnetic wave reverberation room and a second panel that is angled at a specific angle from the floor of the electromagnetic wave reverberation room. According to paragraph 2,
The second panel is,
An electromagnetic wave reverberation chamber configured at different angles according to the available frequencies inside the electromagnetic wave reverberation chamber to form a uniform field distribution of electromagnetic waves. delete According to paragraph 1,
The wall mode stirrer,
An electromagnetic wave reverberation chamber that directly scatters radio signals generated from the antenna. According to paragraph 1,
The 'W' shaped unit panel is,
An electromagnetic wave reverberation room including a plurality of panels having the same angle. According to paragraph 1,
The electromagnetic wave reverberation room is,
An electromagnetic wave reverberation room is a shielded space that has the shape of a polyhedron and controls the reflection characteristics of electromagnetic waves.

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