KR20250134353A - Waveguide magic tee structure for compactness and weight reduction with microwave transition structure and method for manufacturing the same - Google Patents

Abstract

A magic-T waveguide is disclosed, comprising a waveguide path for electromagnetic waves having four ports, and a terminator assembly coupled to a third port of the ports. The terminator assembly comprises a shifter for shifting an electromagnetic wave in TE mode or an electromagnetic wave in TM mode transmitted to the third port through the waveguide path into an electromagnetic wave in TEM mode, and a terminator for terminating the electromagnetic wave in TEM mode provided by the shifter.

Description

Waveguide magic tee structure for compactness and weight reduction with microwave transition structure and method for manufacturing the same

The present invention relates to a magic tee, which is a four-port waveguide for transmitting electromagnetic waves.

A waveguide (electromagnetic waveguide) is any structure that confines and guides electromagnetic waves to propagate them. It refers to a conducting metal tube with a circular or rectangular cross-section that is hollow and allows electromagnetic waves to propagate.

Figure 1 illustrates a cross-section of a waveguide path of a rectangular waveguide.

A structure with a rectangular cross-section having lengths a and b on the x-axis and y-axis, respectively, as shown in Fig. 1, is called a spherical (rectangular) waveguide. In this case, the direction of propagation of electromagnetic waves is the z-axis.

The signal mode of a waveguide exhibits characteristics different from those of a typical transmission line, such as a microstrip.

In a typical transmission line, the E-field and H-field of electromagnetic waves are formed perpendicular to the direction of propagation of the electromagnetic waves. This mode is called the TEM mode.

However, within the waveguide, only one of the E-fields or H-fields of the electromagnetic wave is perpendicular to the direction of propagation.

That is, depending on the structure of the waveguide, only the E-field is perpendicular to the direction of propagation of the electromagnetic wave, or only the H-field is perpendicular to the direction of propagation of the electromagnetic wave.

When only the E-field is perpendicular to the direction of propagation of the electromagnetic wave, it is called TE mode, and when only the H-field is perpendicular to the direction of propagation of the electromagnetic wave, it is called TM mode.

The TE and TM modes are called TEmn and TMmn, respectively, depending on the form of the electromagnetic wave, where m and n represent the number of maximum amplitude points distributed along the x-axis and y-axis.

Figure 2 shows the E-field of the TE mode in the waveguide.

In Fig. 2, for the TE10 mode, there is one maximum amplitude point on the x-axis, and for the TE20 mode, there are two maximum amplitude points on the x-axis. The TE10 mode is generally used in a spherical (rectangular) waveguide.

A magic tee, or hybrid tee, is a four-port waveguide tee that combines E-plane and H-plane waveguide tees. One port of the magic tee is equipped with a device called a waveguide terminator. However, the volume of the waveguide terminator increases in proportion to its power dissipation characteristics. This large size increases the overall volume and weight of the magic tee.

The present invention seeks to provide a technique for reducing the size and weight of a magic tee including a terminal.

Waveguide-T

A waveguide tee is a three-port device that can be used to distribute or combine power in a waveguide system. It is formed when three waveguide tubes are connected in the shape of the English alphabet "T," hence its name.

There are two main types of waveguide tees: E-Plane Waveguide Tee and H-Plane Waveguide Tee.

Figure 3a is a perspective view showing the structure of an E-plane waveguide-Tee.

Figure 3b shows the direction of the E-field within the waveguide-Tee when the third port in the E-plane waveguide-Tee is an input port.

Figure 3c shows the direction of the E-field within the waveguide-Tee when the first port in the E-plane waveguide-Tee is the input port.

The above E-plane waveguide-Tee has the following characteristics:

A waveguide-tee is a three-port device similar to a power splitter. When the axes of the side arms are parallel to the electric field (E) of the coaxial tee, the tee is called an E-plane tee junction. In this type of tee, the outputs are 180° out of phase with each other, regardless of which port the inputs are fed from.

As shown in Fig. 3b, if the input signal is injected into the third port, the output is split between the first and second ports and has a phase difference of 180 degrees from each other.

As shown in Fig. 3c, if an input signal is injected into the first port, the output is split between the second and third ports, having a phase difference of 180 degrees from each other.

Fig. 4 is a perspective view showing the structure of an H-plane waveguide-Tee.

The H-plane waveguide-Tee has the following characteristics:

When the axis of the side arm of the waveguide-tee is parallel to the flow of the magnetic field (H) and perpendicular to the flow of the electric field (E) from the first port, the tee may be referred to as an H-plane waveguide-tee.

The H-plane waveguide-Tee functions as a two-way in-phase power divider/combiner. That is, the H-plane waveguide-Tee has additive characteristics. When two input signals are injected into the first and second ports, if the two input signals are in-phase, the output at the third port is additive. When an input signal is injected into the third port, the input signal is split into two identical signals that are in-phase at the first and second ports.

Magic Tea

Figure 5 shows the structure of Magic-T and its waveguide path structure.

In (a), (b), and (c) of Fig. 5, an E-plane waveguide-T, an H-plane waveguide-T, and a magic-T are presented, respectively, and in (d) of Fig. 5, the three-dimensional dimension direction of the magic-T presented in (c) of Fig. 5 is shown for reference.

The structure of the Magic-T consists of a combination of an H-plane waveguide-T and an E-plane waveguide-T, with four ports provided and each port being impedance matched.

Magic-T is a circuit composed of a waveguide structure, and its basic operating properties, such as signal modes, are identical to those of a waveguide.

The Magic-T (Hybrid-T) has four ports. The first and second ports are co-linear ports, the third port is a difference port, and the fourth port is a sum port.

Magic-T can behave in any of the three cases below:

In the first case, if two signals having the same magnitude and phase are incident from the first and second ports, the incident signals cancel each other out at the third port, so no output is generated, and the sum of the two signals is obtained at the fourth port.

In the second case, if a signal is injected through the fourth port, the signal is equally divided between the first and second ports, and the outputs of the first and second ports are mutually synchronized. At this time, no output is generated from the third port.

In the third case, if a signal is injected through the third port, outputs of the first and second ports are equal in magnitude but with opposite phases (signals are 180 degrees out of phase). In this case, no output is produced from the fourth port.

While Magic-T is ideally lossless, its biggest drawback is that impedance mismatch causes internal reflections, resulting in some power loss. These reflections can be minimized by optimizing impedance matching.

A magic tee is a device used in microwaves as a combiner to combine signals or as a splitter to distribute signals.

When the Magic-T is used as a combiner, all four ports are impedance matched, the first and second ports are used as input ports, the third port is used as a differential port, and the fourth port is used as an output port or a sum port. When signals of the same phase and same amplitude are input to both the first and second ports of the Magic-T, since the third port is a differential port, the signals input to the first and second ports cancel each other out, and no signal is output from the third port. When signals are input to both the first and second ports of the Magic-T, since the fourth port is a sum port, a signal that is the sum of the signals input to the first and second ports is output from the fourth port. In this case, the fourth port can be used as an output port.

When the Magic-T is used as a distributor, if a signal is input through the 4th port, the input signal is evenly distributed to the 1st and 2nd ports and output with the same phase, and no signal is output through the 3rd port. If a signal is input through the 3rd port, the magnitude of the signal output from the 1st port and the signal output from the 2nd port are equal, their phases are opposite, and no signal is output through the 4th port.

A waveguide terminator is connected to the third port of the Magic-T. The input and output ports of the Magic-T are connected to devices other than the Magic-T, and a waveguide terminator is typically connected to the third port (the Cha-port) to achieve impedance matching.

In a Magic-T, the waveguide terminator is impedance-matched to the third port (the third port). This impedance matching determines the isolation between the first and second ports. If the impedance matching between the third port and the waveguide terminator is not ideal, a problem occurs where signals input to the first port are transmitted to the second port, and signals input to the second port are transmitted to the first port.

The above waveguide terminator is a component that must be included in the magic-tee to solve the above-described problem, but it causes problems. To improve the power withstand characteristics of the waveguide terminator, the size of the absorber located within the waveguide terminator must be increased, and a separate heat dissipation structure is required for heat dissipation. For this reason, as the power withstand characteristics of the waveguide terminator increase, its volume increases proportionally. Therefore, the large size of the waveguide terminator increases the overall volume and weight of the magic-tee, which is a problem.

In order to solve the above-described problem caused by the waveguide terminator, the magic-tee device provided according to one aspect of the present invention adopts a lumped terminator having a structure that is smaller and lighter than that of a conventional waveguide terminator. In this case, the lumped terminator cannot directly replace the conventional waveguide terminator. The present invention introduces an additional configuration to couple the lumped terminator to the magic-tee. The lumped terminator is effective only when the electromagnetic wave reaching the lumped terminator is in the TEM mode, and is not effective when the electromagnetic wave reaching the lumped terminator is in the TE mode or the TM mode. However, the electromagnetic wave transmitted through the third port (cha-port) of the magic-tee is in the TE mode or the TM mode, and cannot be in the TEM mode. Therefore, a mode shift device that provides a function of converting the electromagnetic wave transmitted through the third port (cha-port) of the magic-tee into the TEM mode must be installed in the third port (cha-port) of the magic-tee. Accordingly, the electromagnetic wave existing in the space on the first side of the mode transition device is a TE mode or a TM mode, and the electromagnetic wave existing in the space on the second side opposite to the first side is a TEM mode. The lumped constant terminator is placed in the space on the second side.

The above mode transition device can be implemented with a waveguide-to-microstrip transition technology or device. When a signal in TE mode or TM mode passes through a waveguide-to-microstrip device, it is converted into a signal in TEM mode.

The TEM mode signal output by the above mode transition device can be terminated using various techniques. In a preferred example, the TEM mode signal can be terminated using the lumped constant terminator.

Table 1 below is an example comparing the size and power characteristics of waveguide terminators and lumped-in-place terminators that can be used in the X Band.

type Size (㎣) Maximum power capacity weight Frequency of use waveguide terminator 41.4x41.4x130 2W 180g 8.2~12.4GHz Concentrated water purification terminator 3.33x2.67x0.38 125W 1g DC~14GHz

As illustrated in Table 1, lumped-cone terminators are superior to waveguide terminators in size, weight, and power withstand characteristics. Replacing the waveguide terminators used in Magic-Ts with lumped-cone terminators allows for smaller and lighter Magic-Ts. To achieve this, the aforementioned mode shifter must be applied.

According to the present invention, the size and weight of a magic tee including a terminal can be reduced.

Figure 1 illustrates a cross-section of a waveguide path of a rectangular waveguide.
Figure 2 shows the E-field of the TE mode in the waveguide.
Figure 3a is a perspective view showing the structure of an E-plane waveguide-Tee.
Figure 3b shows the direction of the E-field within the waveguide-Tee when the third port in the E-plane waveguide-Tee is an input port.
Figure 3c shows the direction of the E-field within the waveguide-Tee when the first port in the E-plane waveguide-Tee is the input port.
Fig. 4 is a perspective view showing the structure of an H-plane waveguide-Tee.
Figure 5 shows the structure of Magic-T and its waveguide path structure.
FIG. 6a illustrates the external appearance of a magic-T assembly manufactured using a waveguide termination device according to one embodiment of the prior art.
Figure 6b is an enlarged view of area A of Figure 6a.
FIG. 7a illustrates a waveguide path of a magic-T provided according to one embodiment of the present invention and a coupling relationship between a transition device and a lumped-constant terminator installed in the magic-T.
Figure 7b shows only the waveguide path of the magic-T in the configuration of Figure 7a.
Figure 7c shows an exploded perspective view of the transition and concentration terminators in the configuration of Figure 7a.
Figure 8 is an exploded perspective view showing the structure of the transition device shown in Figure 7a from another perspective.
FIG. 9a shows the structure of a magic-tee provided according to another embodiment of the present invention modified from FIG. 7a.
Fig. 9b shows a specific configuration of the terminal assembly of the magic-T presented in Fig. 9a.

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. However, the present invention is not limited to the embodiments described herein and may be implemented in various other forms. The terminology used herein is intended to aid understanding of the embodiments and is not intended to limit the scope of the present invention. Furthermore, the singular forms used below also include the plural forms, unless the context clearly indicates otherwise.

FIG. 6a illustrates the external appearance of a magic-T assembly manufactured using a waveguide termination device according to one embodiment of the prior art.

The magic-T assembly (50) is a device having a form in which three magic-Ts (1`, 2`, 3`) are connected to each other.

Figure 6b is an enlarged view of area A of Figure 6a.

Area A of Fig. 6a is a portion including the magic-T (1`). Reference numerals 11, 12, 13, and 14 represent the first port, the second port, the third port, and the fourth port of the magic-T (1`), respectively. In Figs. 6a and 6b, the first port (11) and the second port (12) have their terminal openings exposed to the outside, but the third port (13) is blocked by a waveguide terminator (15), and the terminal portion of the fourth port is not directly exposed to the outer surface of the magic-T assembly (50).

The first port (11) has a structure that extends in the +x direction from its end opening exposed on the outer surface of the magic-tee assembly (50) and then bends in the -z direction, and the second port (12) has a structure that extends in the +x direction from its end opening exposed on the outer surface of the magic-tee assembly (50) and then bends in the +z direction. The first port (11) and the second port (12) have a form that meets and extends along a straight line from a point where they meet the third port (13) (the extension direction of the third port itself is the y-axis direction). The fourth port (14) extends along the +x direction from the area where the first port (11), the second port (12), and the third port (13) meet each other.

The waveguide terminator (15) has a shape that is elongated along the +y direction, and it can be confirmed that the volume occupied by the waveguide terminator (15) in the magic-T (1`) is very large.

<Magic-T including a terminal assembly and a concentrated water terminal according to one embodiment of the present invention>

FIG. 7a illustrates a waveguide path of a magic-T provided according to one embodiment of the present invention and a coupling relationship between a transition device and a lumped-constant terminator installed in the magic-T.

Figure 7b shows only the waveguide path of the magic-T in the configuration of Figure 7a.

Figure 7c shows an exploded perspective view of the transition and concentration terminators in the configuration of Figure 7a.

Figure 8 is an exploded perspective view showing the structure of the transition device shown in Figure 7a from another perspective.

Hereinafter, the configuration and features of a magic tee provided according to one embodiment of the present invention will be described with reference to FIGS. 7a, 7b, 7c, and 8.

According to one embodiment of the present invention, a magic-tee (1) provided has a structure in which a waveguide path (100) and a terminal assembly (200) are combined.

The waveguide path (100) represents a waveguide path defined and formed by the inner surface of a conductive metal tube that is not shown.

The waveguide (100) includes a first port (11), a second port (12), a third port (13), and a fourth port (14).

The first port (11), the second port (12), the third port (13), and the fourth port (14) intersect each other at a predetermined coupling area.

Alternatively, the first port (11), the second port (12), the third port (13), and the fourth port (14) are connected to each other in a predetermined connection area.

In Fig. 7b, the bonding area of the above modification is the area immediately below the third port (13) (area adjacent to the -y direction).

The first port (11) may have a straight or bent line shape as a waveguide path connected to the above-mentioned coupling region. An example having a bent line shape is shown in Fig. 7b.

The second port (12) may have a straight or bent line shape as a waveguide path connected to the above-mentioned coupling region. An example having a bent line shape is shown in Fig. 7b.

The third port (13) may have a straight or bent line shape as a waveguide path connected to the above-mentioned coupling region. Fig. 7b presents an example in which the extension direction of the third port (13) is directed in the +y direction, but the extension length has a value substantially close to zero (0).

The fourth port (14) may have a straight or bent line shape as a waveguide path connected to the above-mentioned coupling region. Fig. 7b illustrates an example having a straight line shape extending along the +x direction.

Even if the first port (11) and the second port (12) each have the shape of a bent line, the extension lines of the first port (11) and the second port (12) may have a shape that extends substantially along a straight line near the joining area. In the example presented in Fig. 7b, the first port (11) and the second port (12) extend along the z direction near the joining area.

According to one embodiment of the present invention, a terminal assembly (200) is coupled to the third port (13) of the magic tee (1). The terminal assembly (200) may be coupled in a manner that blocks the third port (13).

The terminal assembly (200) may include a transition element (210), a concentrated terminator (220), and a connecting member (230).

The transition device (210) may include a dielectric substrate (211), a matching portion (212) which is a conductive region formed on one side of both sides of the dielectric substrate (211), a ground plane (213) which is a conductive region formed in a shape surrounding the matching portion (212) and spaced apart from the matching portion (212) on the one side, a waveguide short pattern (214) which is a conductive region formed on the other side of the dielectric substrate (211), a microstrip line (215) which is a conductive pattern formed in one direction and spaced apart from the waveguide short pattern (214) on the other side, and a via hole (216) which is formed by penetrating the dielectric substrate (211) and electrically connecting the ground plane (213) and the waveguide short pattern (214) to each other. The matching portion (212) and the ground plane (213) may be formed as a first conductive layer formed on one side of the dielectric substrate (211). The waveguide short pattern (214) and the microstrip line (215) may be formed as a second conductive layer formed on the other side. Among the two sides of the dielectric substrate (211), the one side is arranged closer to the third port (13) than the other side.

The above-mentioned transition device (210) converts the electromagnetic wave of the TE mode or TM mode transmitted through the third port (13) into the electromagnetic wave of the TEM mode, and the converted electromagnetic wave of the TEM mode is output through the microstrip line (215). The electromagnetic wave of the TEM mode output through the microstrip line (215) is transmitted to the lumped constant terminator (220) and extinguished.

In one embodiment, the genetic substrate (211) may have dimensions and a shape that cover the third port (13).

The ground plane (213) can be electrically connected by contacting the conductive metal tube defining the third port (13).

As shown in Fig. 7c, in one embodiment, the cross-section of the third port (13) may be rectangular. And the cross-section of the matching portion (212) may be rectangular. And the inner boundary line surrounding the matching portion (212) among the ground planes (213) may have a rectangular shape. And the waveguide short pattern (214) may have a rectangular shape, and at this time, a recess may be formed at one point of the rectangle to receive a microstrip line (215). The microstrip line (215) may be formed to extend long in a form that penetrates toward the center of the waveguide short pattern (214) along the recess. The microstrip line (215) and the waveguide short pattern (214) are spaced apart from each other and are insulated from each other. The ground plane (213) and the waveguide short pattern (214) have a size and shape that can be connected to each other through the conductor of the via hole (216).

The lumped terminator (220) can be electrically connected to the microstrip line (215) by a connecting member (230). For example, the connecting member (230) may be a conductive line as illustrated in FIG. 7C. Alternatively, as another example, the lumped terminator (220) may be directly connected to the protruding end of the microstrip line (215) by soldering, wherein the soldering may replace the role of the connecting member (230) illustrated in FIG. 7C. The lumped terminator (220) may be a resistive element.

<Magic-T comprising a microstrip structure including a terminal assembly and a high-loss medium according to one embodiment of the present invention>

FIG. 9a shows the structure of a magic-tee provided according to another embodiment of the present invention modified from FIG. 7a.

Fig. 9a has the same structure as that presented in Fig. 7a, except that the concentrated constant terminator (22) of Fig. 7a is replaced with a second microstrip structure (250).

Fig. 9b shows a specific configuration of the terminal assembly (200) of the magic tee (1) presented in Fig. 9a. The terminal assembly (200) includes a transition device (210) and a second microstrip structure (250).

The following description is provided with reference to Figures 9a and 9b.

The second microstrip structure (250) has a microwave transition structure with a high-loss medium.

The second microstrip structure (250) may include a second microstrip line (255), a second dielectric substrate (251), and a second ground plane (253).

The microstrip line (215) included in the terminal assembly (200) may be electrically directly connected to the second microstrip line (255).

In one embodiment, the microstrip line (215) and the second microstrip line (255) may be substantially a single structure.

In another embodiment, the microstrip line (215) and the second microstrip line (255) may be distinct structures, and in this case, the microstrip line (215) and the second microstrip line (255) may be electrically directly connected by a connecting line such as the connecting member (230) shown in FIG. 7c.

The second genetic substrate (251) may be composed of a lossy medium.

In one embodiment, the materials of the dielectric substrate (211) and the second dielectric substrate (251) may be different from each other.

In one embodiment, the second ground plane (253) may be substantially a single structure with the ground plane (213).

In another embodiment, the second ground plane (253) and the ground plane (213) may be provided separately from each other.

In one embodiment, the second microstrip line (255) and the second ground plane (253) are respectively arranged on opposite sides of the second dielectric substrate (251). Therefore, the second microstrip line (255) and the second ground plane (253) may not be electrically connected to each other.

In one embodiment, the second microstrip line (255) and the microstrip line (215) may be electrically connected to each other. At this time, the second microstrip line (255) and the microstrip line (215) may be connected to each other by a connecting member (230) as shown in FIG. 7c, or the second microstrip line (255) and the microstrip line (215) may be a single structure.

In one embodiment, the ground plane (213) and the second ground plane (253) may be connected to the ground via a grounding portion. Alternatively, in another embodiment, the ground plane (213) and the second ground plane (253) may be a single structure.

In one embodiment, the dielectric substrate (211) and the second dielectric substrate (251) may be a single structure.

In one embodiment, in FIG. 9b, the second microstrip line (255) is expressed as a straight line, but may be implemented in a spiral shape for miniaturization.

In one embodiment, the second microstrip structure (250) may be implemented as a strip structure.

By using a second microstrip structure (250) including a high-loss medium such as that shown in FIG. 9a, termination can be achieved without using the lumped terminator (220) shown in FIG. 7a.

At this time, the impedance of the second microstrip structure (250) is determined by the line width of the second microstrip line (255), and the frequency characteristics of the second microstrip structure (250) can be determined by the length of the second microstrip line (255).

The second microstrip line (255) containing a high-loss medium is impedance matched with another part of the magic-T (1) connected to the second microstrip line (255).

To elaborate, the signal changed to TEM mode through the transition structure is transmitted to a microstrip line or strip line including a second dielectric substrate (251) made of a high-loss material. Since the high-loss material is a medium with high dielectric loss or magnetic loss, the electromagnetic wave signal experiences high loss when transmitted in the high-loss material. Due to the high loss, the signal has a high attenuation value, and the signal transmitted to the microstrip line or strip line made of the high-loss material due to the high attenuation value is converted into heat. By utilizing this characteristic, termination can be performed instead of lumped-in integer termination. At this time, the frequency and electrical characteristics are determined by the length and line width of the strip line or microstrip line.

In this specification, the concentrated terminator (220) and the second microstrip structure (250) may both be collectively referred to as a ‘terminator.’

By utilizing the embodiments of the present invention described above, those skilled in the art will be able to easily implement various changes and modifications without departing from the essential characteristics of the present invention. The content of each claim may be combined with other claims that are not in a citation relationship within the scope of this specification, as long as it is understood.

1: Magic Tea
100: Waveguide
11: Port 1
12: Second port
13: Third port
14: Port 4
200: Terminator assembly
210: Transition
220: Concentrated water purifier terminator
211: Dielectric substrate
212 matching element
213: Ground plane
214: Waveguide short pattern
215: Microstrip line
216: Via hole
230: Connecting member
250: Second microstrip structure
251: Second genetic substrate
253: Second ground plane
255: Second microstrip line

Claims (15)

An electromagnetic wave guide path (100) consisting of four ports (11, 12, 13, 14); and
A terminal assembly (200) coupled to the third port (13) among the above ports;
Includes,
The above terminal assembly,
A transition device (210) that transitions the electromagnetic wave of the TE mode or the electromagnetic wave of the TM mode transmitted to the third port through the above-mentioned waveguide to the electromagnetic wave of the TEM mode, and
A terminator that terminates the electromagnetic wave of the TEM mode provided by the above transition device.
including,
Magic-T waveguide. A magic-T waveguide, wherein the termination device is a lumped-constant termination device (220) in the first paragraph. A magic-T waveguide in the first paragraph, wherein the termination is a microstrip structure (250) containing a high-loss medium. In the first paragraph,
The above transition is,
genetic substrate (211),
A matching portion (212), which is a conductive area formed on one side of both sides of the above-mentioned dielectric substrate (211);
A ground plane (213), which is a conductive area formed in a shape that surrounds the matching part (212) and is spaced apart from the matching part (212) on the one side;
A waveguide short pattern (214), which is a conductive area formed on the other side of the two sides of the above-mentioned dielectric substrate;
A microstrip line (215) which is a conductive pattern formed by extending in one direction and spaced apart from the waveguide short pattern on the other side; and
A via hole (216) formed by penetrating the above dielectric substrate and electrically connecting the ground plane and the waveguide short pattern to each other;
including,
Magic-T waveguide. In the fourth paragraph, the magic-T waveguide, wherein the termination is connected to the microstrip line. A magic-T waveguide in claim 5, wherein the termination is an SMD resistor, one terminal of the SMD resistor is connected to the microstrip line, and the other terminal of the SMD resistor is connected to ground. In paragraph 4,
A magic-T waveguide, wherein the one side is positioned closer to the third port than the other side. A termination assembly (200) coupled to one port of a magic-T waveguide having an electromagnetic wave guide path (100) consisting of four ports (11, 12, 13, 14),
A transition device (210) that transitions the electromagnetic wave of the TE mode or the electromagnetic wave of the TM mode transmitted to the third port through the above-mentioned waveguide to the electromagnetic wave of the TEM mode, and
A terminator that terminates the electromagnetic wave of the TEM mode provided by the above transition device.
including,
Terminator assembly. In the 8th paragraph, the terminator assembly is a concentrated terminator (220). A terminator assembly in claim 9, wherein the terminator is a microstrip structure (250) containing a high-loss medium. In paragraph 8,
The above transition is,
genetic substrate (211),
A matching portion (212), which is a conductive area formed on one side of both sides of the above-mentioned dielectric substrate (211);
A ground plane (213), which is a conductive area formed in a shape that surrounds the matching part (212) and is spaced apart from the matching part (212) on the one side;
A waveguide short pattern (214), which is a conductive area formed on the other side of the two sides of the above-mentioned dielectric substrate;
A microstrip line (215) which is a conductive pattern formed by extending in one direction and spaced apart from the waveguide short pattern on the other side; and
A via hole (216) formed by penetrating the above dielectric substrate and electrically connecting the ground plane and the waveguide short pattern to each other;
including,
Terminator assembly. A termination assembly in accordance with claim 11, wherein the termination is connected to the microstrip line. A terminal assembly in claim 12, wherein the terminal is an SMD resistor, one terminal of the SMD resistor is connected to the microstrip line, and the other terminal of the SMD resistor is connected to ground. An electromagnetic wave guide path (100) consisting of four ports (11, 12, 13, 14); and
A transition device (210) coupled to the third port (13) among the above ports;
Includes,
The above transition device is configured to transition the electromagnetic wave of the TE mode or the electromagnetic wave of the TM mode transmitted to the third port through the waveguide path into the electromagnetic wave of the TEM mode.
Magic-T waveguide. In Article 14,
The above transition is,
genetic substrate (211),
A matching portion (212), which is a conductive area formed on one side of both sides of the above-mentioned dielectric substrate (211);
A ground plane (213), which is a conductive area formed in a shape that surrounds the matching part (212) and is spaced apart from the matching part (212) on the one side;
A waveguide short pattern (214), which is a conductive area formed on the other side of the two sides of the above-mentioned dielectric substrate;
A microstrip line (215) which is a conductive pattern formed by extending in one direction and spaced apart from the waveguide short pattern on the other side; and
A via hole (216) formed by penetrating the above dielectric substrate and electrically connecting the ground plane and the waveguide short pattern to each other;
including,
Magic-T waveguide.