JPS63142704A - Meander line type polarization converter - Google Patents

Abstract

PURPOSE:To reduce the reflection of a current which is induced by a meander line and flows in the end part of the meander line by providing a terminal resistor in the end part of the meander line. CONSTITUTION:The terminal resistor 8 is provided in the end part of the meander line 2 in order to actuate in the same way the meander line 2 has an infinite length. Namely, owing to the terminal resistor 8 the reflection of the current, which is induced in the end part of the meander line 2, in the end part of the meander line 2 is removed so that the meander line 2 actuates in the same way it has the equivalently infinite length. As a result, the amplitude between an electric field Ep3 parallel with the direction of the meander line 2 and the electric field Eq4 perpendicular to the direction of the meander line 2 is kept equal and the phase difference occuring between the electric field Ep3 and the electric field Eq4 becomes equal in the center part and in the periphery part of a meander line type polarization converter.

Description

[Detailed Description of the Invention] [Industrial Application Fields] This invention is directed to 1. For example, a meander line type antenna for converting linearly polarized waves to circularly polarized waves in a circularly polarized antenna mounted on an artificial satellite and used for communication with the ground. (Meander-Li
ne) This relates to a polarization converter.

[Prior art] Figure 5 shows the results of the 6th National Conference of the Institute of Electronics and Communication Engineers in 1988.
47, 2.1986. FIG. 3 is a configuration diagram of a conventional meander line type polarization converter disclosed as a "Meander line loaded patch antenna" by Norio Miyahara et al. on page 3-84. In the figure, (1) is a dielectric substrate, and (2) is a meander line (meandering strip) formed by etching a conductor on the dielectric substrate (1). Figure 6 is an enlarged view of the peripheral part of the conventional meander line type polarization converter shown in Figure 5, where (1) is the dielectric substrate and (2) is the meander line, as in Figure 5. . (3) is a vector indicating the electric field EP in the direction parallel to the meander line (2), and (4) is a vector indicating the electric field E9 in the direction perpendicular to the meander line (2). FIG. 7 is a perspective view showing an example of the configuration of a circularly polarized antenna using a plurality of the above meander line type polarization converters. In the figure, (5a) ~
(5c) is a meander line type polarization converter, (6) is a slot array antenna, and (7) is a vector indicating the radiated electric field E radiated from the slot array antenna (6). In addition, the meander line type polarization converter (5a)
The angle between the direction of each meander line (2) (not shown in FIG. 7) constructed above (5c) and the radiation electric field E (7) is 45 degrees.

Next, these operations will be explained. First, in FIG. 7, the linearly polarized radiation electric field E (7) radiated from the slot array antenna (6) is
Meander line polarization converter (5) located above the meander line polarization converter (5)
a). This meander line type polarization converter (5
The radiation electric field E(7) incident on a) is divided into an electric field Eρ(3) parallel to the meander line (2) and an electric field Eq(4) perpendicular to the meander line (2), as shown in Figure 6. Can be divided. This electric field E is applied to the meander line (2).
A current corresponding to p(3) and electric field Eq(4) is induced. The meander line (2) is the electric field Ep (3)
acts as an inductance for the current induced by the electric field Eq(4), and as a capacitance for the current induced by the electric field Eq(4), so the electric field Ep( There is a certain phase difference θa between 3) and the electric field Eq(4). 6th electric field Ep(3) with this phase difference θa and the electric field Eq(4)
is incident on the meander line type polarization converter (5b) which are stacked at a certain interval d. In this meander line type polarization converter (5b), as in the case of the meander line type polarization converter (5a), the current corresponding to the electric field Ep (3) and the electric field E9 (4) is in this meander line type polarization converter (5b). It is induced by the meander line (2) on the polarization converter (5b).

Further, a phase difference θb is generated between the electric field Ep (3) and the electric field Eq (4) that have passed through the meander line polarization converter (5b). Also, in the meander line polarization converter (5c), the electric field Ep (3) and the electric field Eq
A phase difference θC occurs between (4). Therefore, the sum of phase differences θθ〇b〇C generated between the electric field Ep (3) and the electric field Eq (4) by the meander line type polarization converters (5a) to (5c) becomes 90 degrees. As shown, pitches A and B of meander line (2) and meander line (2)
), the width of the meander line, and F are determined by the radiated electric field E from the slot array antenna (6).
(7) and the meander line type polarization converter (5a) to (
Since the angle formed by the meander line (2) on 5c) is 45 degrees, the above electric field Ep (3) and electric field Eq (4
) are equal, and the combined electric field of the electric field Ep (3) and electric field Eq (4) transmitted through the meander line polarization converter (5c) and radiated into space is circular. It becomes a polarized wave. That is, the meander line type polarization converters (5a) to (5c) convert the linearly polarized radiation electric field E(7) from the slot array antenna (6) into
) can be converted to circularly polarized waves.

[Problems to be Solved by the Invention] The conventional meander line type polarization converter is constructed as described above, and the pitches A, B of the meander lines (2), the intervals C of the meander lines (2), and the meander lines The width of the line, F, is set on the assumption that the meander line (2) has an infinite length. but,
Because the end of the conventional meander line (2) is open,
A current induced in the meander line (2) by the electric field Ep (3) and the electric field Eq (4) is reflected at the end of the meander line (2), and this current is disturbed. As a result, the phase difference between the electric field Ep (3) and the electric field E9 (4) transmitted through the meander line polarization converters (5a) to (5cm) is The central part is different from the peripheral part, and the electric field Ep(3) and the electric field E
Since each amplitude of q(4) is not equal in the peripheral area, there is a problem that a perfect circularly polarized wave cannot be obtained.

This invention was made in order to solve the above-mentioned problems, and there is no disturbance due to reflection of the induced current even at the end of the meander line, and the meander line is not disturbed even at the peripheral part of the meander line type polarization converter. electric field E parallel to
P(3) and the amplitude of the vertical electric field Eq(4) are kept equal, and the phase difference generated between the electric field Ep(3) and the electric field Eq(4) is also maintained in the meander line type polarization converter. The purpose of the present invention is to obtain a meander line type polarization converter in which the central and peripheral parts of the polarization converter can be made equal.

[Means for Solving the Problems] The meander line type polarization converter according to the present invention includes a terminating resistor at the end of the meander line, so that the meander line has an infinite length. It is designed to work.

[Function] The meander line type polarization converter according to the present invention eliminates the reflection of the current induced at the end of the meander line by the terminating resistor provided at the end of the meander line. , which results in the same behavior as if the meander line had an isometrically infinite length6.As a result, the electric field Ep parallel to the direction of the meander line and the electric field E9 perpendicular to the direction of the meander line are kept equal in amplitude, and the electric field Ep
The phase difference generated between the electric field E(I) and the electric field E(I is equal between the central part and the peripheral part of the meander line polarization converter.6 [Embodiment] An embodiment of the present invention will be described below.

FIG. 1 is a block diagram of a meander line polarization converter according to this embodiment, and FIG. 2 is an enlarged view of the peripheral portion of the meander line polarization converter. In each episode, (1) to (
4) is the same part as the conventional meander line polarization converter, and (8) is a terminating resistor connected to the end of the meander line (2).

Next, these operations will be explained. Similar to the conventional example shown in FIG. incident on the wave converter (5a). The radiation electric field E (7) incident on this meander line type polarization converter (5a) is transmitted to the meander line (2) as shown in FIGS.
Electric field Ep (3) in the direction parallel to and meander line (2)
and an electric field E(1(4)) in a direction perpendicular to the radiated electric field E(7).Since the angle between the radiation electric field E(7) and the meander line is 45 degrees, this electric field Ep(3) and the electric field Eq(4)
) will have the same amplitude.

The meander line (2) has this electric field Ep (3
) and a current corresponding to the electric field Eq(4) is induced. Note that the above meander line (2) acts as an inductance for the current induced by the electric field E p (3) and the electric field Eq (4), and as a capacitance for the current induced by the electric field Eq (4). Operate. In addition, the electric field E transmitted through the meander line type polarization converter (5a)
A certain phase difference θa occurs between p(3) and the electric field Eq(4). At this time, the meander line type polarization converter (
Since the terminating resistor (8) is also connected to the peripheral part of 5a), that is, the end of the meander line (2), the electric field Eρ (3) and the electric field Eq (4) induce Even if each current flows into the end of the meander line (2), it will not be reflected at the end of the meander line (2).

Therefore, the current induced at the end of the meander line (2) by the electric field Ep (3) and the electric field Eq (4) is equal to the current induced at the center of the meander line (2), and this meander line The amplitudes of the electric field Ep (3) and the electric field Eq (4) transmitted through the meander line type polarization converter (5a) are kept equal, and the phase difference between them is also the same as that of the meander line type polarization converter (5a). The values are the same in the center and the periphery. The above also applies to the meander line polarization converters (5b) (5c) shown in FIG. This allows the termination resistor (8) to be connected to the meander line (2).
), the electric field Ep(3) is applied to the entire surface of the meander line polarization converters (5a) to (5c).
Since the amplitudes of and the electric field Eq (4) are equal and a uniform phase difference is obtained, each meander line type polarization converter (5a
) to (5c), the sum of phase differences θa 〇b 〇C
By setting E to 90 degrees, the directly polarized radiation electric field E(7) from the slot array antenna (6) is converted into a completely circularly polarized wave.

The type of the terminating resistor (8), the method of attaching the terminating resistor (8) to the dielectric substrate (1), and the connection between the terminating resistor (8) and the meander line (2) Regarding the electrical connection method, the above dielectric substrate (14)
There are no particular limitations on the material or size. Note that in this embodiment, a slot array antenna (6) was used as the antenna that radiates linearly polarized radio waves, but other types and shapes may be used as long as the antenna radiates linearly polarized radio waves. . Further, in this embodiment, three meander line polarization converters (5a) to (5c) are used.

Of course, any number of meander line polarization converters used to generate circularly polarized waves may be used.

Fig. 3 is a block diagram of a meander line type polarization converter in another embodiment, and Fig. 4 is an enlarged view of the surrounding area. shows the same part as . (9) is a resistive material applied to the periphery of the dielectric substrate (1) so as to be in contact with the end of the meander line (2). In the embodiment shown in Fig. 1, a termination resistor (8) is connected to each end of the meander line (2), but in the embodiment shown in Fig. 3, a resistive material (9) is connected to each end of the meander line (2). Since the coating is applied so as to be in contact with the end of the meander line (2), the current induced by the electric field Ep (3) and the electric field Eq (4) and flowing into the end of the meander line (2) is caused by this resistance. sexual material (
9) and is not reflected to the meander line (2) side. Therefore, this resistive material (9) provides the same effect as the termination resistor (8). Note that the type of this resistive material (9) does not matter.

The thickness of the applied resistive material (9) may be set to a thickness that absorbs the current induced in the meander line (2) and flowing into the end of the meander line (2). In the above example, the resistive material (9)
are formed on the dielectric substrate (1) by coating, but other methods such as vapor deposition may be used for forming these.

[Effects of the Invention] As described above, according to the present invention, since the termination resistor is provided at the end of the meander line, there is no reflection of the current induced in the meander line and flowing into the end of the meander line. Therefore, this is equivalent to the case where the meander line has an infinite length.

In addition, the amplitudes of the electric field EP parallel to the meander line and the electric field E9 perpendicular to the meander line transmitted through the meander line type polarization converter are kept equal, and the phase difference generated between the electric field Ep and the electric field E9 is also reduced to the meander line type polarization converter. This has the effect that the value can be made equal across the entire surface of the wave converter.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a meander line polarization converter according to an embodiment of the present invention, FIG. 2 is an enlarged view of the peripheral part of the meander line polarization converter, and FIG. 3 is a diagram of another embodiment of the present invention. A configuration diagram of a meander line type polarization converter in an embodiment, FIG. 4 is an enlarged view of the peripheral part of the meander line type polarization converter, and FIG. 5 is a configuration diagram of a conventional meander line type polarization converter. FIG. 6 is an enlarged view of the peripheral portion of the meander line polarization converter, and FIG. 7 is a tilted view showing one configuration of a circularly polarized antenna using the meander line polarization converter. In the figure, (1) is a dielectric substrate, (2) is a meander line, (5a) to (5c) are meander line type polarization converters, (6) is a slot array antenna, (8) is a terminating resistor, (9) is a resistive material. Note that the same reference numerals in the figures indicate the same or corresponding parts. Figure 1 Figure 2 Figure 3 Figure 9: @ Resistant Material Figure 4 Figure 5 % r2 Figure 6 Figure 7 Procedural Amendment (Voluntary) Showa Year Month Day'-, 1j1 3, Full text of the person making the amendment Amended Description 1, Name of Invention Meander Line Polarization Converter 2, Claims (1) Meander lines are formed at equal intervals on a dielectric substrate by etching process, and meander lines are formed on the dielectric substrate at equal intervals. By injecting a linearly polarized radio wave into the dielectric substrate with a polarization plane in the direction of the line and the angle of 45L, a radio wave with a polarization component parallel to the meander line,
In a meander line type polarization converter that provides a phase difference between a meander line on a substrate and a radio wave of a vertically polarized component. A meander line type polarization converter characterized in that a terminating resistor is provided at the end of the meander line. (2) The meander line type polarization converter according to item 1 of the scope of Patent M, characterized in that a terminating resistor is individually connected to each end of the meander lines arranged at equal intervals. (3) A meander line according to claim 1, wherein a terminating resistor is formed by arranging a resistive material around the dielectric substrate so as to be in contact with an end of the meander line. type polarization converter. 3. Detailed description of the invention [Industrial Application Fields] This invention is directed to 1. For example, in a circularly polarized antenna mounted on an artificial satellite and used for communication with the ground, a meander line type antenna for converting linearly polarized waves to circularly polarized waves is used. (Meander-Li
ne) This relates to a polarization converter. [Prior art] Figure 5 shows the results of the 6th National Conference of the Institute of Electronics and Communication Engineers in 1988.
No. 47, 1986. Norio Miyahara et al. “
1 is a configuration diagram of a conventional meander line polarization converter disclosed as "Meander Line Loaded Patch Antenna". This is a meander line (meandering strip) constructed by etching a conductor.
It is an enlarged view of the peripheral part of the conventional meander line type polarization converter shown in the figure, in which (1) is a dielectric substrate and (2) is a meander line similarly to FIG. 5. (3) is a vector indicating an electric field Eρ in a direction parallel to the meander line (2), and (4) is a vector indicating an electric field Eq in a direction perpendicular to the meander line (2). FIG. 7 is a perspective view showing an example of the configuration of a circularly polarized antenna using a plurality of the above meander line type polarization converters. In the figure, (5a) to (
5c) is a meander line type polarization converter, (6) is a slot array antenna, and (7) is a vector indicating the radiated electric field E radiated from the slot array antenna (6). In addition, the meander line type polarization converter (5Q) ~
(5c) Each meander line (2) (7th
The angle between the direction (not shown in the figure) and the radiation electric field E(7) is 45 degrees. Next, these operations will be explained. First, in FIG. 7, the linearly polarized radiation electric field E (7) radiated from the slot array antenna (6) is
Meander line polarization converter (5) located above the meander line polarization converter (5)
a). This meander line type polarization converter (5
The radiation electric field E (7) incident on a) is divided into an electric field Ep (3) parallel to the meander line (2) and an electric field Eq (4) perpendicular to the meander line (2), as shown in Fig. 6. Can be divided. This electric field E is applied to the meander line (2).
A current corresponding to p(3) and electric field Eq(4) is induced. The meander line (2) is the electric field Ep (3)
acts as an inductance for the current induced by the electric field Eq (4), and as a capacitance for the current induced by the electric field Eq (4), so the electric field E p transmitted through the meander line polarization converter (5a) (3) and the electric field Eq (4), there is a certain phase difference Da. Next, the electric field Ep(3) and the electric field Eq(4) with this phase difference θa are
) are incident on meander line type polarization converters (5b) which are stacked at a certain interval d. In this meander line type polarization converter (5b), as in the case of the meander line type polarization converter (5a), the current corresponding to the electric field Ep (3) and the electric field E9 (4) is in this meander line type polarization converter (5b). It is induced by the meander line (2) on the polarization converter (5b). Further, a phase difference Ob occurs between the electric field Ep (3) and the electric field Eq (4) that have passed through the meander line polarization converter (5b). Also, in the meander line polarization converter (5c), the electric field Ep (3) and the electric field Eq
(Therefore, a phase difference Oc occurs between the electric fields Ep (3) and Eq (4) due to the meander line polarization converters (5a) to (5c). Pitches A and B of meander line (2) and meander line (2
), the width of the meander line, and F are determined by the radiated electric field E from the slot array antenna (6).
(7) and the meander line type polarization converter (5a) to (
Since the angle formed by the meander line (2) on 5c) is 45 degrees, the electric field Eρ(3) and the electric field Eq(4
) are equal in amplitude IEρ1 and IEql, and the combined electric field of the electric field Ep(3) and the electric field Eq(4) transmitted through the meander line polarization converter (5c) and radiated into space is circular. It becomes a polarized wave. That is, the meander line type polarization converters (5a) to (5c) convert the linearly polarized radiation electric field E(7) from the slot array antenna (6) into
) can be converted to circularly polarized waves. [Problems to be Solved by the Invention] The conventional meander line type polarization converter is configured as described above, and the pitches A and B of the meander lines (2), the interval C of the meander lines (2), and the meander lines (2)
The width F is set on the assumption that the meander line (2) has an infinite length. However, since the ends of the conventional meander line (2) are open, the current induced in the meander line (2) by the electric field Eρ (3) and the electric field Eq (4) flows through the meander line (2).
) is reflected at the edge of the current, which disrupts this current. As a result, the phase difference between the electric field E p (3) and the electric field Eq (4) transmitted through the meander line polarization converters (5a) to (5C) is There is a problem that complete circular polarization cannot be obtained because the amplitudes of the electric field Eρ(3) and the electric field Eq(4) are not equal at the periphery. Ta. This invention was made in order to solve the above-mentioned problems, and there is no disturbance due to reflection of the induced current even at the end of the meander line, and the meander line is not disturbed even at the peripheral part of the meander line type polarization converter. electric field E parallel to
The amplitudes of the electric field Eq(4) perpendicular to p(3) are kept equal, and the phase difference generated between the electric field Ep(3) and the electric field Eq(4) is also the same as that of the meander line polarization converter. The purpose of this invention is to obtain a meander line type polarization converter that can be made equal in the center and the periphery. [Means for Solving the Problems] The meander line type polarization converter according to the present invention includes a terminating resistor at the end of the meander line, so that the meander line has an infinite length. It is designed to work. [Function] The meander line type polarization converter according to the present invention eliminates the reflection of the current induced at the end of the meander line by the terminating resistor provided at the end of the meander line. , this behaves equivalent to the case where the meander line has an isometrically infinite length. As a result, the amplitude of the electric field EP parallel to the direction of the meander line and the electric field Eq perpendicular to the direction of the meander line are kept equal, and the electric field EP
The phase difference generated between the electric field E9 and the electric field E9 is equal between the central part and the peripheral part of the meander line polarization converter. [Example 1] An example of the present invention will be described below. FIG. 1 is a block diagram of a meander line polarization converter according to this embodiment, and FIG. 2 is an enlarged view of the peripheral portion of the meander line polarization converter. In each episode, (1) to (
4) is the same part as the conventional meander line polarization converter, and (8) is a terminating resistor connected to the end of the meander line (2). Next, these operations will be explained. Similar to the conventional example shown in FIG. incident on the wave converter (5a). The radiation electric field E (7) incident on this meander line type polarization converter (5a) is transmitted to the meander line (2) as shown in FIGS.
Electric field Ep (3) in the direction parallel to and meander line (2)
and an electric field EQ (4) in the vertical direction. At this time, the angle between the radiation electric field E(7) and the meander line is 4
Since it is 5 degrees, this electric field Ep (3) and electric field Eq (4)
and the amplitude will be equal. The meander line (2) has this electric field Ep (3
) and a current corresponding to the electric field Eq(4) is induced. Note that the meander line (2) operates as an inductance for the current induced by the electric field Eρ(3), and as a capacitance for the current induced by the electric field Eq(4). Therefore, a certain phase difference Oa occurs between the electric field Ep(3) and the electric field Eq(4) transmitted through the meander line polarization converter (5a). At this time, since the terminating resistor (8) is connected to the peripheral part of the meander line type polarization converter (5a), that is, the end of the meander line (2), the electric field Even if the currents induced by Ep(3) and the electric field E9(4) flow into the end of the meander line (2), they are not reflected at the end of the meander line (2). Therefore, the above electric field Ep(3) and electric field Eq(4
), the current induced at the end of the meander line (2) is equal to the current induced at the center of the meander line (2), and this meander line type polarization converter (5
The amplitudes of the electric field Ep (3) and the electric field Eq (4) transmitted through a) are kept equal, and the phase difference between them is also the same between the central and peripheral parts of the meander line polarization converter (5a). The values are equal. The above also applies to the meander line polarization converters (5b) (5c) shown in FIG. By connecting the terminating resistor (8) to the end of the meander line (2), the electric field E is generated over the entire surface of the meander line type polarization converters (5a) to (5c).
Since the amplitudes of p(3) and electric field Eq(4) are equal and a uniform phase difference is obtained, the sum of phase differences caused by each meander line polarization converter (5a) to (5c) is θa+θ
By setting b+Oc to 90 degrees, the linearly polarized radiated electric field E(7) from the slot array antenna (6) is converted into a completely circularly polarized wave. In addition, the above terminating resistor (8
) and the dielectric substrate (1) of the termination resistor (8).
There are no particular restrictions on the mounting method, the electrical connection method between the terminating resistor (8) and the meander line (2), and the material and size of the dielectric substrate (14). It's not something you can do. In this example, a slot array antenna (6) was used as the antenna that radiates linearly polarized radio waves, but other types and shapes may be used as long as the antenna radiates linearly polarized radio waves. . Furthermore, although three meander line polarization converters (5a) to (5c) are used in this embodiment, any number of meander line polarization converters may be used to generate circularly polarized waves. Of course it's a good thing. Fig. 3 is a block diagram of a meander line type polarization converter in another embodiment, and Fig. 4 is an enlarged view of the surrounding area. shows the same part as . (9) is a resistive material applied to the periphery of the dielectric substrate (1) so as to be in contact with the end of the meander line (2). In the embodiment shown in FIG. 1, a terminating resistor (8) is connected to each end of the meander line (2), but in the embodiment shown in FIG.
Since the resistive material (9) is applied so as to be in contact with the end of the meander line (2), it is induced by the electric field Eρ (3) and the electric field Eq (4) and the end of the meander line (2) is The current flowing into this resistive material (9
) and is not reflected to the meander line (2) side. Therefore, this resistive material (9) provides the same effect as the termination resistor (8). Note that the type of this resistive material (9) does not matter. The thickness of the applied resistive material (9) may be set to a thickness that absorbs the current induced in the meander line (2) and flowing into the end of the meander line (2). In the above example, the resistive material (9)
are formed on the dielectric substrate (1) by coating, but other methods such as vapor deposition may be used for forming these. [Effects of the Invention] As described above, according to the present invention, since the termination resistor is provided at the end of the meander line, there is no reflection of the current induced in the meander line and flowing into the end of the meander line. Therefore, this is equivalent to the case where the meander line has an infinite length. In addition, the amplitudes of the electric field Ep parallel to the meander line and the electric field E9 perpendicular to the meander line transmitted through the meander line polarization converter are kept equal, and the phase difference generated between the electric field Eρ and the electric field Eq is also controlled by the meander line polarization converter. This has the effect that the values can be made equal over the entire surface of the wave converter. 4. Brief Description of the Drawings FIG. 1 is a block diagram of a meander line polarization converter according to an embodiment of the present invention, and FIG. 2 is an enlarged view of the peripheral portion of the meander line polarization converter. FIG. 3 is a block diagram of a meander line polarization converter according to another embodiment of the present invention, FIG. 4 is an enlarged view of the peripheral part of the meander line polarization converter, and FIG. 5 is a conventional meander line polarization converter. Fig. 6 is an enlarged view of the peripheral part of the meander line type polarization converter, Fig. 7
The figure is a perspective view showing one configuration of a circularly polarized antenna using a meander line type polarization converter. In the figure, (1) is a dielectric substrate, (2) is a meander line, (5a) to (5c) are meander line type polarization converters, (6) is a slot array antenna, (8) is a terminating resistor, (9) is a resistive material. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (3)

[Claims] (1) Meander lines are formed at equal intervals on a dielectric substrate by etching a conductive element, and linearly polarized waves with a polarization plane in the direction of an angle of 45 degrees with respect to the direction of the meander lines are formed on the dielectric substrate. By making a radio wave incident on the dielectric substrate, a radio wave with a polarization component parallel to the meander line,
A meander line type polarization converter that provides a phase difference between a meander line and a radio wave of a vertically polarized component on a dielectric substrate, the meander line having a terminating resistor at the end of the meander line. Line type polarization converter. (2) The meander line type polarization converter according to claim 1, wherein a terminating resistor is individually connected to each end of the meander lines arranged at equal intervals. (3) A meander line according to claim 1, wherein a terminating resistor is formed by arranging a resistive material around the dielectric substrate so as to be in contact with an end of the meander line. type polarization converter.