JP2014072625A - Distribution phase shifter and antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To implement further downsizing and band widening of a distribution phase shifter.SOLUTION: A distribution phase shifter 1 which distributes a high frequency signal and gives a phase difference to distributed high frequency signals comprises: an input-side lead wire 10 and an output-side lead wire 20 which are disposed in parallel at an interval less than a 1/4 wavelength of the high frequency signal; and a movable conductor 30 which can be capacitively coupled with the lead wires 10, 20 and is movable in a length direction of the lead wires 10, 20 in a reciprocative manner. The movable conductor 30 includes: an input section 31 which is overlapped with one end portion of the input-side lead wire 10 in the length direction; an output section 32 which is overlapped with an intermediate portion of the output-side lead wire 20 in the length direction; and a connection section 33 which connects the input section 31 and the output section 32. Between the input-side lead wire 10 and the output-side lead wire 20, a line is formed which has a length equal to or more than 1/4 times as long as the wavelength of the high frequency signal.

Description

  The present invention relates to a distributed phase shifter and an antenna device.

  The distribution phase shifter has a function of distributing the input high-frequency signal and making the phase of the distributed high-frequency signal different from each other, for example, for adjusting the beam tilt angle of the phased array antenna (PA antenna) Used.

  A distributed phase shifter related to the present invention is described in US Pat. The distributed phase shifter described in Patent Document 1 (referred to as “variable phase shifter” in Patent Document 1) includes two microstrip lines formed on a dielectric substrate, And a hybrid circuit as a movable coupler straddling the microstrip line.

  The two microstrip lines are arranged in parallel to each other, and one end of one microstrip line (hereinafter referred to as “input side microstrip line”) is an input port and the other end is an isolation port. Yes. Further, both ends of the other microstrip line (hereinafter referred to as “output-side microstrip line”) are output ports. The high-frequency signal input to the input port is transmitted to the output side microstrip line via the input side microstrip line and the hybrid circuit, and is output from each output port. That is, the high-frequency signal is divided into two and output from the two output ports.

  Further, the hybrid circuit is configured to be slidable on the input side microstrip line and the output side strip line in an electromagnetically coupled state. When the hybrid circuit is slid in one longitudinal direction of the microstrip line, the line length from the input port to one output port increases, while the line length from the input port to the other output port does not change. That is, the phase of the high-frequency signal output from the other output port is changed while the phase of the high-frequency signal output from one output port is maintained by sliding the hybrid circuit in one longitudinal direction of the microstrip line. Thus, a phase difference can be given to the high-frequency signals output from the respective output ports.

JP 2005-64915 A

  The hybrid circuit in the distributed phase shifter described in Patent Document 1 is formed in a rectangular frame shape by four strip lines. The first strip line overlaps with the input-side microstrip line and extends in the line direction of the input-side microstrip line. The second stripline overlaps with the output-side microstrip line and extends in the line direction of the output-side microstrip line. That is, the first strip line and the second strip line are parallel to each other, and the distance between them is the same as the distance between the input side microstrip line and the output side microstrip line.

  On the other hand, the third stripline extends in a direction orthogonal to the line direction of the microstrip line, and connects one end of the first stripline and the second stripline. The fourth strip line extends in a direction orthogonal to the line direction of the microstrip line, and connects the other ends of the first strip line and the second strip line. That is, the third strip line and the fourth strip line extend over the input side microstrip line and the output side microstrip line, and the respective lengths are the distances between the input side microstrip line and the output side microstrip line. Is the same.

  Here, the third strip line and the fourth strip line straddling the input-side microstrip line and the output-side microstrip line function as impedance transformers. Therefore, the lengths of the third strip line and the fourth strip line are 1/2 times (= λ / 2) or 1/4 times (= λ / 4) of the wavelength (λ) of the input high-frequency signal. It is necessary to set the distance between the input side microstrip line and the output side microstrip line to λ / 2 or λ / 4. That is, the distance between the input-side microstrip line and the output-side microstrip line cannot be made smaller than λ / 4, and there is a limit to downsizing the distribution phase shifter. In addition, if impedance transformers are connected in multiple stages to increase the bandwidth, the distance between the input-side microstrip line and the output-side microstrip line is increased accordingly.

  An object of the present invention is to provide a distributed phase shifter and an antenna device that achieve further miniaturization and wider bandwidth.

  The distribution phase shifter according to the present invention is a distribution phase shifter that distributes a high-frequency signal and gives a phase difference to the distributed high-frequency signal, and is arranged in parallel at an interval of less than ¼ of the wavelength of the high-frequency signal. And can be capacitively coupled to the fixed first conductor and the second conductor, the first conductor and the second conductor, and reciprocally movable in the longitudinal direction of the first conductor and the second conductor. A movable conductor, and the movable conductor includes an input portion that overlaps one longitudinal end portion of the first conductor, an output portion that overlaps a longitudinal middle portion of the second conductor, the input portion, and the output portion. And the movable conductor forms a line having a length that is an integral multiple of 1/4 of the wavelength of the high-frequency signal between the first conductor and the second conductor.

  According to one aspect of the present invention, a first line having a length that is 1/4 times the wavelength of the high-frequency signal is formed by the input portion of the movable conductor, and the connection portion of the movable conductor, A second line having a length that is ¼ times the wavelength of the high-frequency signal and connected in series to the first line is formed.

  According to another aspect of the present invention, there are provided an input terminal connected to the other longitudinal end of the first conductor and two output terminals respectively connected to both longitudinal ends of the second conductor. When the movable conductor moves, the length of the line from the input terminal via the movable conductor to one of the two output terminals increases or decreases by twice the amount of movement of the movable conductor, The length of the line reaching the other of the two output terminals via the movable conductor does not change.

  According to another aspect of the present invention, the input part has an insertion hole with one end opened, the output part has a through hole with both ends opened, and one end in the longitudinal direction of the first conductor is the insertion The second conductor is inserted into the hole, the second conductor passes through the through hole, and the movable conductor can reciprocate within the entire length of the insertion hole.

  According to another aspect of the invention, the first conductor and the second conductor are triplate lines.

  The antenna device of the present invention includes the distribution phase shifter and a plurality of antenna elements connected to the distribution phase shifter.

  ADVANTAGE OF THE INVENTION According to this invention, the distribution phase shifter and antenna apparatus with which further miniaturization and the broadband were realized are provided.

It is a top view of the distribution phase shifter which concerns on one Embodiment. It is an expanded sectional view along the AA line shown by FIG. It is explanatory drawing which shows the change of the line length before and behind the movement of the movable conductor shown by FIG. It is a top view which shows an example of the dimension of each part of the distribution phase shifter shown by FIG. It is a schematic diagram which shows the structural example of the tournament type | mold distribution phase shifter which applied the distribution phase shifter shown by FIG. It is an expanded sectional view which shows the modification of the distribution phase shifter shown by FIG.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. A distribution phase shifter 1 shown in FIG. 1 includes a first conducting wire 10 and a second conducting wire 20, and a movable conductor 30 provided across the two conducting wires 10 and 20. The high frequency signal input to the first conductor 10 is transmitted to the second conductor 20 through the movable conductor 30 and is output from both ends of the second conductor 20. Therefore, in the following description, the first conductor 10 may be referred to as “input conductor 10” and the second conductor 20 may be referred to as “output conductor 20” for distinction. However, such a distinction is merely a distinction for convenience of explanation.

  The input side conductor 10 and the output side conductor 20 are triplate lines having at least a pair of ground layers and a signal layer sandwiched between the ground layers, and have a wavelength (λ) of an input high-frequency signal. They are arranged in parallel at intervals less than 1/4 times (= λ / 4). In this specification, as shown in FIG. 1, the linear direction (longitudinal direction) of the input side conductor 10 and the output side conductor 20 is defined as “X direction”, and the direction orthogonal to the X direction is defined as “Y direction”. Define. 1 is defined as “+ X direction”, and the direction from the top to the bottom of FIG. 1 is defined as “−X direction”. Further, the direction from the left side to the right side in FIG. 1 is defined as “+ Y direction”, and the direction from the right side to the left side in FIG. 1 is defined as “−Y direction”. However, this definition is only a definition for convenience of explanation.

  One end portion in the X direction of the input side conducting wire 10 overlaps the movable conductor 30 to form a coupling end portion 11, and the other end portion in the X direction is connected to the input terminal 12. On the other hand, an intermediate portion in the X direction of the output side conductor 20 overlaps the movable conductor 30. Further, both ends of the output side conductor 20 in the X direction are connected to the two output terminals 21 and 22, respectively. The term “X-direction intermediate portion” of the output-side conductor 20 is not a restrictive term meaning only the center in the X direction, but is a term meaning any portion inside the both ends in the X direction. . This is also clear from the fact that the high-frequency signal coupled to the intermediate portion in the X direction of the output side conductor 20 is output from the output terminals 21 and 22 connected to both ends of the output side conductor 20 in the X direction. .

  The movable conductor 30 is a block made of a conductive material, and has a planar shape shown in FIG. The movable conductor 30 includes an input portion 31 that overlaps the coupling end portion 11 of the input side conductor 10, an output portion 32 that overlaps the output side conductor, and a connection portion 33 that connects the input portion 31 and the output portion 32. . The input conductor 10 and the output conductor 20 are fixedly provided on a substrate (not shown), while the movable conductor 30 is movably provided. Specifically, the movable conductor 30 is guided by a guide mechanism (not shown) and can reciprocate (slidable) in the X direction while maintaining the overlap between the input side conductor 10 and the output side conductor 20.

  As shown in FIGS. 1 and 2, the input portion 31 of the movable conductor 30 is elongated along the X direction, and the outer cross section is rectangular. The input portion 31 is formed with an insertion hole 34 that is open at the end surface and has a circular cross section extending in the + X direction, and the coupling end portion 11 of the input side conductor 10 is inserted into the insertion hole 34. In other words, the portion where the insertion hole 34 is formed in the movable conductor 30 is the input portion 31. The insertion hole 34 has a bottom, and its full length (depth) is 18.4 mm. That is, the coupling end portion 11 of the input side conducting wire 10 can be inserted inside the insertion hole 34 by a maximum of 18.4 mm. That is, the maximum moving distance in the X direction of the movable conductor 30 of this embodiment is 18.4 mm. But the said numerical value regarding the full length (depth) of the insertion hole 34 is an example, and the full length of the insertion hole 34 can be arbitrarily extended or shortened. In the present embodiment, the entire length of the insertion hole 34 can be extended up to 70 mm (36.8 mm + 33.2 mm) while maintaining the overall dimensions of the movable conductor 30 (see FIG. 4). As described above, the portion where the insertion hole 34 is formed in the movable conductor 30 is the input portion 31. Therefore, when the full length of the insertion hole 34 is extended or shortened, the full length of the input part 31 also changes according to this.

  As shown in FIG. 2, the inner peripheral surface of the insertion hole 34 and the outer peripheral surface of the coupling end portion 11 overlap each other so as to be capable of capacitive coupling. Specifically, the inner peripheral surface of the insertion hole 34 and the outer peripheral surface of the coupling end portion 11 overlap with each other via a dielectric (a fluororesin film 11a in the present embodiment) formed on the outer peripheral surface of the coupling end portion 11. ing. However, a dielectric may be formed on the inner peripheral surface of the insertion hole 34. Note that the dielectric interposed between the inner peripheral surface of the insertion hole 34 and the outer peripheral surface of the coupling end portion 11 reduces the frictional resistance between them, and also plays a role of realizing the smooth movement of the movable conductor 30. .

  As shown in FIGS. 1 and 2, the output portion 32 of the movable conductor 30 is elongated along the X direction, and its outer cross section is rectangular. In other words, the output unit 32 is parallel to the input unit 31 and has substantially the same cross-sectional shape as the input unit 31. The output portion 32 is formed with a through-hole 35 having a circular cross section that opens at both end faces thereof and extends in the X direction. The output-side conductor 20 is inserted through the through-hole 35. That is, the output side conductor 20 penetrates the output part 32. In other words, the portion where the through hole 35 is formed in the movable conductor 30 is the output portion 32.

  As shown in FIG. 2, the inner peripheral surface of the through hole 35 and the outer peripheral surface of the output-side conductor 20 overlap each other so as to be capable of capacitive coupling. Specifically, the inner peripheral surface of the through-hole 35 and the outer peripheral surface of the output side conductor 20 are overlapped via a dielectric (in this embodiment, a fluororesin film 20a) formed on the outer peripheral surface of the output side conductor 20. ing. However, a dielectric may be formed on the inner peripheral surface of the through hole 35. The dielectric interposed between the inner peripheral surface of the through-hole 35 and the outer peripheral surface of the output-side conductor 20 reduces the frictional resistance between them, and also plays a role of realizing the smooth movement of the movable conductor 30. .

  As shown in FIG. 1, the connection part 33 includes an end part of the input part 31 (an end part opposite to the side where the insertion hole 34 shown in FIG. 2 is open) and a central part of the output part 32. The input unit 31 and the output unit 32 are connected to each other. Specifically, the connection portion 33 extends from the end portion of the input portion 31 in the + X direction, and then bends in the + Y direction and is connected to the central portion of the output portion 32. In other words, a portion of the movable conductor 30 other than the input unit 31 and the output unit 32 is the connection unit 33. For impedance adjustment, the connecting portion 33 is formed thicker (having a larger cross-sectional area) than the input portion 31 and the output portion.

  In the distributed phase shifter 1 having the above-described configuration, the high-frequency signal input to the input terminal 12 is transmitted to the coupling end 11 of the input-side conductor 10. The high frequency signal transmitted to the coupling end portion 11 of the input side conductor 10 is transmitted to the input portion 31 of the movable conductor 30 via the fluororesin film 11a shown in FIG. 2 and is transmitted to the output portion 32 via the connection portion 33. . The high-frequency signal transmitted to the output unit 32 of the movable conductor 30 branches at the output unit 32, part of which is transmitted in the + X direction, and the other part is transmitted in the -X direction. The high-frequency signal branched in the + X direction is transmitted to the output-side conductive wire 20 via the fluororesin film 20a shown in FIG. The high-frequency signal branched in the −X direction is transmitted to the output-side conductive wire 20 via the fluororesin film 20 a shown in FIG. 2 and is output from the output terminal 22. That is, the high-frequency signal input to the input terminal 12 is divided into two and output from the output terminals 21 and 22, respectively. Therefore, in the following description, in the output part 32 of the movable conductor 30, the part extending in the + X direction from the X-direction midpoint O is referred to as “first output part 32a”, and the part extending in the −X direction is referred to as “second output part 32b. May be distinguished from each other. The flow of the high-frequency signal will be described again according to this distinction as follows.

  Part of the high-frequency signal input to the input terminal 12 is output from the output terminal 21 in the order of the input portion 31 of the movable conductor 30 → the connection portion 33 → the first output portion 32 a. Another part of the high-frequency signal input to the input terminal 12 is output from the output terminal 22 in the order of the input part 31 of the movable conductor 30 → the connection part 33 → the second output part 32 b.

  Here, as shown in FIG. 3, when the movable conductor 30 is moved (slid) in the + X direction by L (mm), the input portion 31 of the movable conductor 30 moves away from the input terminal 12 by L (mm). That is, the distance (line length) from the input terminal 12 to the input part 31 of the movable conductor 30 increases by L (mm). At the same time, the second output portion 32b of the movable conductor 30 moves away from the output terminal 21 by L (mm), while the first output portion 32a approaches the output terminal 21 by L (mm). In other words, the distance (line length) from the second output portion 32b of the movable conductor 30 to the output terminal 22 increases by L (mm), while the distance from the first output portion 32a of the movable conductor 30 to the output terminal 21 ( The line length is reduced by L (mm). That is, when the movable conductor 30 moves in the ± X direction, output is performed from the input terminal 12 via the input side conductor 10, the movable conductor 30 (input part 31, connection part 33, second output part 32 b) and output side conductor 20. The length of the line reaching the terminal 22 increases or decreases by twice the amount of movement of the movable conductor 30, whereas the input side conductor 10 and the movable conductor 30 (input section 31, connection section 33, first output section). The length of the line reaching the output terminal 21 via the output conductors 32a) and 32a does not change. In other words, the line length from the input terminal 12 to the output terminal 21 and the line length from the input terminal 12 to the output terminal 22 are made different from each other without changing the physical lengths of the input side conductor 10 and the output side conductor 20. Can do. Therefore, although the phase of the high frequency signal output from the output terminal 22 changes with respect to the phase of the input high frequency signal, the phase of the high frequency signal output from the output terminal 21 does not change. Thus, in the distributed phase shifter 1 according to the present embodiment, the phase difference can be given to the distributed high-frequency signal by moving the movable conductor 30.

  Furthermore, the input part 31 and the connection part 33 of the movable conductor 30 have a length that is 1/4 times the wavelength (λ) of the input high-frequency signal. The first output portion 32a and the second output portion 32b of the movable conductor 30 also have a length that is 1/4 times the wavelength (λ) of the high-frequency signal. That is, the input unit 31 forms a first line having a length that is 1/4 times the wavelength of the high-frequency signal. Moreover, the connection part 33 has the length of 1/4 of the wavelength of a high frequency signal, and forms the 2nd track | line connected in series with the said 1st track | line. Furthermore, the first output unit 32a and the second output unit 32b have a length that is 1/4 times the wavelength of the high-frequency signal, and each of the third lines connected in parallel to the second line. Form. In other words, the movable conductor 30 functions as a multistage transformer (transformer) inserted between the input side conductor 10 and the output side conductor 20. Specifically, the input section 31 of the movable conductor 30 functions as a first-stage λ / 4 transformer, and the connection section 33 functions as a second-stage λ / 4 transformer. The first output unit 32a and the second output unit 32b function as a third-stage λ / 4 transformer. Here, the first-stage and second-stage λ / 4 transformers mainly contribute to widening the band, and the third-stage λ / 4 transformer mainly contributes to adjustment of the distribution ratio.

  As described above, in the distributed phase shifter 1 according to the present embodiment, the wavelength of the high frequency signal is ¼ times or more (1/2 times in the present embodiment) between the input side conductor 10 and the output side conductor 20. A track with a length of is inserted. Therefore, impedance matching can be achieved in a wide band while achieving a reduction in size by setting the distance between the input-side conductor 10 and the output-side conductor 20 to less than ¼ times the wavelength of the high-frequency signal.

  In FIG. 4, the dimension (mm) of each part of the distribution phase shifter 1 which concerns on this embodiment is shown. The dimensions shown in FIG. 4 are an example of dimensions when the wavelength (λ) of the input high-frequency signal is 2 GHz. If each part has the dimensions shown in the figure, moving the movable conductor 30 in the + X direction by 6.4 mm increases the line length from the input terminal 12 to the output terminal 22 by 12.8 mm (twice the amount of movement). On the other hand, the line length from the input terminal 12 to the output terminal 21 does not change. As a result, a phase difference of 30 degrees is given between the signal output from the output terminal 21 and the signal output from the output terminal 22.

  FIG. 5 shows an example of a tournament type distribution phase shifter to which the distribution phase shifter 1 according to the present embodiment is applied. The tournament-type distribution phase shifter shown in the figure includes a first conductor 111 having one end connected to the input terminal 120, a second conductor 112 provided next to the first conductor 111 in parallel with the first conductor 111, Next to the second conducting wire 112, the third conducting wire 113 and the fourth conducting wire 114 are provided in parallel with the second conducting wire 112 and provided on the same straight line. Both ends of the third conducting wire 113 are branched and connected to the output terminals 121a to 121d, respectively. Further, both ends of the fourth conducting wire 114 are branched and connected to the output terminals 121e to 121h, respectively. That is, the tournament type distribution phase shifter shown in FIG. 5 distributes the inputted high frequency signal into eight. In addition, the space | interval of the 1st conducting wire 111 and the 2nd conducting wire 112 is less than (lambda) / 4, and the space | interval of the 2nd conducting wire 112, the 3rd conducting wire 113, and the 4th conducting wire 114 is also less than (lambda) / 4.

  The end of the first conductor 111 (the end opposite to the side connected to the input terminal 120) and the intermediate portion of the second conductor 112 are connected via the first movable conductor 131 to form a T-shaped branch path. Is configured. Further, one end portion of the second conducting wire 112 and an intermediate portion of the third conducting wire 113 are connected via the second movable conductor 132 to form a T-shaped branch path, and the other end portion of the second conducting wire 112 and the fourth conducting wire. The intermediate portion 114 is connected via a third movable conductor 133 to form a T-shaped branch path. In FIG. 5, the movable conductors 131, 132, and 133 are shown in a simplified manner, but these movable conductors 131, 132, and 133 have the same dimensions as the movable conductor 30 shown in FIG. And having a shape.

  The first movable conductor 131, the second movable conductor 132, and the third movable conductor 133 are moved in the ± X direction by the drive mechanism 150. The drive mechanism 150 includes an operation lever 152 rotatably supported by a support pin 151, a first connection arm 155 and a second connection arm 155 rotatably connected to one end side of the operation lever 152 by connection pins 153 and 154, respectively. A connection arm 156 and an operation arm 158 rotatably connected to the other end side of the operation lever 152 by a connection pin 157 are provided. The first connection arm 155 is connected to the first movable conductor 131, and the second connection arm 156 is connected to the second movable conductor 132 and the third movable conductor 133, respectively. Therefore, when the operation arm 158 is driven by a drive source such as a motor or an actuator to rotate the operation lever 152, the first connection arm 155 and the second connection arm 156 move in the respective longitudinal directions, and accordingly. Thus, the first movable conductor 131, the second movable conductor 132, and the third movable conductor 133 move in the same direction (X direction). That is, the support pin 151 corresponds to the fulcrum, the connection pins 153 and 154 correspond to the action point, and the connection pin 157 corresponds to the force point. The drive mechanism 150 moves the three movable conductors 131, 132, and 133 simultaneously by the “lever principle” .

  Here, the ratio of the distance between the support pin 151 and the connection pin 153 and the distance between the support pin 151 and the connection pin 154 is 3: 1. Therefore, the amount of movement of the first connecting arm 155 when the operation lever 152 is rotated by an arbitrary amount is three times the amount of movement of the second connecting arm 156. In other words, the movement amount of the first movable conductor 131 is three times the movement amount of the second movable conductor 132 and the third movable conductor 133.

  When the operation lever 152 shown in FIG. 5 is rotated clockwise by a predetermined amount about the support pin (fulcrum) 151, the first movable conductor 131, the second movable conductor 132, and the third movable conductor 133 move in the + X direction. To do. If the movement amount of the second movable conductor 132 and the third movable conductor 133 at this time is L (mm), the movement amount of the first movable conductor 131 is 3 L (mm).

  As described above, when the first movable conductor 131 moves 3L (mm) in the + X direction, and the second movable conductor 132 and the third movable conductor 133 move L (mm) in the + X direction, the input terminal 120 to the output terminal 121a, The line length reaching 121b does not change before and after the movement of the movable conductors 131, 132, and 133. In other words, the increase / decrease in the line length accompanying the movement of the movable conductors 131, 132, 133 is offset. On the other hand, the line length from the input terminal 120 to the output terminals 121c and 121d is increased by 2L (mm) compared to before the movable conductors 131, 132, and 133 are moved. Further, the line length from the input terminal 120 to the output terminals 121e and 121f is increased by 4L (mm) compared to before the movement of the movable conductors 131, 132 and 133, and the line length from the input terminal 120 to the output terminals 121g and 121h. Increases by 6 L (mm). The reason why the line length changes in this way is as already described with reference to FIG.

  In the distributed phase shifter shown in FIG. 5, the three movable conductors 131, 132, 133 are simultaneously moved by a common drive mechanism, but the first movable conductor 131, the second movable conductor 132, and the third movable conductor 133 are moved. Even if they are moved separately by different drive mechanisms, the line length can be changed as described above. Also, the line length can be changed as described above even if the three movable conductors 131, 132, 133 are moved separately by different drive mechanisms.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. 6A to 6C show some modified examples of the above embodiment. In addition, about the structure which is the same as the structure already demonstrated or substantially the same, the same code | symbol is attached | subjected in FIG. 6, and the overlapping description is abbreviate | omitted.

  In the distributed phase shifter 1 shown in FIG. 6A, the first conducting wire 10 and the second conducting wire 20 have a rectangular cross section. Accordingly, the insertion hole 34 and the through hole 35 of the movable conductor 30 also have a rectangular cross section.

  In the distributed phase shifter 1 shown in FIG. 6B, the movable conductor 30 is composed of a plate-like first member 30a and a second member 30b. The first member 30a and the second member 30b are opposed to each other with the first conductor 10 and the second conductor 20 interposed therebetween. The first member 30a and the second member 30b are provided with two recesses 36, and the corresponding recesses 36 are abutted to form an insertion hole 34 and a through-hole 35 between the counterpart member. Yes.

  In the distributed phase shifter 1 shown in FIG. 6C, the movable conductor 30 is composed of a first substrate 30c and a second substrate 30d. The first substrate 30c and the second substrate 30d are opposed to each other with the first conducting wire 10 and the second conducting wire 20 in between. Fluororesin films 11a and 20a as dielectrics are interposed between the first substrate 30c and the second substrate 30d and the first conductor 10 and the second conductor 20, respectively.

1 Distribution phase shifter 10 First conductor (input-side conductor)
12 Input terminal 20 Second conductor (output-side conductor)
21 and 22 Output terminal 30 Movable conductor 31 Input part 32 Output part 33 Connection part 34 Insertion hole 35 Through hole

Claims (6)

A distribution phase shifter that distributes a high-frequency signal and gives a phase difference to the distributed high-frequency signal,
A first conductor and a second conductor arranged in parallel and spaced at intervals of less than ¼ of the wavelength of the high-frequency signal; and
A movable conductor capable of capacitive coupling with the first conductor and the second conductor, and reciprocally movable in the longitudinal direction of the first conductor and the second conductor;
The movable conductor includes an input portion that overlaps one longitudinal end portion of the first conductor, an output portion that overlaps a longitudinal intermediate portion of the second conductor, and a connection portion that connects the input portion and the output portion. ,
The distribution phase shifter, wherein the movable conductor forms a line having a length equal to or more than ¼ times the wavelength of the high-frequency signal between the first conductor and the second conductor. The distributed phase shifter according to claim 1,
A first line having a length ¼ times the wavelength of the high-frequency signal is formed by the input portion of the movable conductor,
The connecting portion of the movable conductor forms a second line having a length that is 1/4 times the wavelength of the high-frequency signal and connected in series to the first line. Distribution phase shifter. The distribution phase shifter according to claim 1 or 2,
An input terminal connected to the other longitudinal end of the first conducting wire;
Two output terminals respectively connected to the longitudinal ends of the second conductor,
When the movable conductor moves, the length of the line from the input terminal via the movable conductor to one of the two output terminals increases or decreases by twice the moving amount of the movable conductor, and the movable terminal moves from the input terminal to the movable terminal. A distributed phase shifter characterized in that the length of a line reaching the other of the two output terminals via a conductor does not change. The distribution phase shifter according to any one of claims 1 to 3,
The input part has an insertion hole opened at one end,
The output part has a through-hole opened at both ends,
One end in the longitudinal direction of the first conductor is inserted into the insertion hole, and the second conductor penetrates the through hole,
The distribution phase shifter is characterized in that the movable conductor can reciprocate within the entire length of the insertion hole. The distribution phase shifter according to any one of claims 1 to 4,
The distributed phase shifter, wherein the first conducting wire and the second conducting wire are triplate lines.   6. An antenna device comprising: the distributed phase shifter according to claim 1; and a plurality of antenna elements connected to the distributed phase shifter.

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