JP4849570B2 - Variable delay line - Google Patents

Description

  The present invention relates to a variable delay line, and more particularly to an improvement of a variable delay line that varies a delay time of an ultrahigh-speed electrical signal and adjusts a timing skew in an electronic device such as a computer.

  In an electronic device such as a microcomputer, in recent years, it is an indispensable situation that the clock signal frequency of a built-in microprocessor exceeds 2 GHz, and about 5 GHz to 10 GHz will be realized in the near future.

  However, there is no variable delay line that can be used for timing skew adjustment of such a high-speed signal and is not provided as a single electronic component.

  Therefore, the present applicant has proposed a configuration as shown in International Publication (WO) 2005/053084 (Patent Document 1).

  As shown in FIG. 8 and FIG. 9, the configuration is such that the dielectric layer 3 on which the fixed-side ground conductor 1 is formed and the dielectric layer 3 facing the fixed-side ground conductor 1 are strip-shaped at equal intervals. A first and second fixed conductive lines 5 and 7 formed in a belt-shaped movable conductive line 11 formed in a U-shape on a variable conductive line substrate 9 (not shown in FIG. 8). In the state where the open side is in contact with the first and second fixed conductive lines 5 and 7 and the bent portion side is protruded, the first and second fixed conductive lines 5 and 7 extend in the length direction. And a movable conductive line 11 slidably supported.

  8 is a coplanar ground conductor as a fixed-side ground conductor formed on the dielectric layer 3 so as to sandwich the first and second fixed conductive lines 5 and 7, and reference numeral 15 is movable. It is a movable-side ground conductor facing the conductive line 11.

  In such a variable delay line, as shown in FIGS. 9 (1) and 9 (2), if the adjusting means 19 is formed by screwing the adjusting screw 19 into the nut 17 formed at the end of the variable conductive line substrate 9, the adjusting means 21 can be adjusted. By the rotation of the screw 19, the protruding length of the movable conductive line 11 with respect to the first and second fixed conductive lines 5 and 7 can be varied.

  Therefore, as shown in FIG. 8, one end of the second fixed conducting line 7 is grounded via the load resistor RL, and a pulse signal from the pulse signal source PG having the internal impedance R0 is sent to one end of the first fixed conducting line 5. When applied, a pulse signal is output to the load resistor RL with a delay time corresponding to the protruding length of the movable conductor 9 with respect to the first and second fixed conductors 5 and 7.

In addition, such a variable delay line can be applied to mass production techniques of general electronic components, and it is considered that a delay time of an ultrafast pulse signal of 5 GHz to 10 GHz can be adjusted with high resolution.
WO2005 / 053084

  However, in the variable delay line according to Patent Document 1 described above, the first problem relating to the degree of surface contact between the first and second fixed conductive lines 5 and 7 and the movable conductive line 11, and the movable conductive line 11 is a dielectric. It has been found that there is a second problem related to the characteristic impedance of the portion directly facing the layer 3 through the air layer.

  As for the first problem, the first and second fixed conductive lines 5 and 7 and the movable conductive line 11 need to be in surface contact, but the dielectric layer 3 and the movable conductive line substrate 9 are made of ceramic or the like. Since a hard material is used, polishing is required to improve the flatness of the contact surface.

  However, the coefficient of thermal expansion is different between the dielectric ceramic material and the electrical conductor material, and even if the surfaces of the first and second fixed conducting lines 5 and 7 and the movable conducting line 11 are polished with high precision, the variable delay line is not provided. In a wide environmental temperature range desired for the mounted electric device, the polished surface is curved and the flatness tends to deteriorate. Therefore, it is difficult to obtain stable electrical characteristics as a variable delay line.

  Further, regarding the second problem, for example, when the delay time is the maximum as shown in FIG. 9 (1), the movable conductive line 11 protrudes greatly from the first and second fixed conductive lines 5, 7, The protruding portion faces the dielectric layer 3 with the air layer having the same thickness as the first and second fixed conducting lines 5 and 7 interposed therebetween. Therefore, since the dielectric constant of the air layer is low, the characteristic impedance of the protruding portion tends to be high.

  In order to compensate for this, by arranging the movable-side ground conductor 15, the characteristic impedance can be set to the target value of 50Ω as an average value. However, it has been found that it is difficult to obtain stable characteristic impedance and amplitude characteristics in the entire variable range of the delay time in the frequency band of 5 GHz or more due to the longer ground path.

  In addition, Patent Document 1 discloses a configuration in which the first and second fixed conductive lines 5 and 7 and the movable conductive line 11 are in point contact, but the frequency characteristics obtained in the point contact configuration are those of the surface contact configuration. The characteristics are more likely to deteriorate, and the second problem is not solved.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an inexpensive and small variable delay line that can adjust the delay time with high resolution even for an ultrafast pulse signal of 5 GHz to 10 GHz. And

  In addition, the present invention provides a good surface contact between the fixed conductive line and the movable conductive line, and makes it possible to easily match the characteristic impedance of the movable conductive line protruding from the fixed conductive line to that of the fixed conductive line. The purpose is to provide a delay line.

In order to solve such a problem, the variable delay line according to the present invention includes a dielectric substrate having a ground conductor formed on one side thereof, and an equidistant interval between the opposite surface of the dielectric substrate and the ground conductor. First and second fixed conductive lines formed in a band shape, and a band-shaped movable conductive line formed in a U shape from a flexible thin conductor on a flexible substrate , both of the band-shaped movable conductive lines The open side is in contact with the first and second fixed conductive lines and is slidable in the length direction of the first and second fixed conductive lines in a state where the bent side of the strip-shaped movable conductive line protrudes. The movable conductive line supported, and the movable conductive line portion that pressurizes the movable conductive line to the first and second fixed conductive lines and that protrudes from the first and second fixed conductive lines are the dielectric substrate. Insulating elastic body that pressurizes to contact That is provided with a pressure mechanism.

  The variable delay line according to the present invention may have a configuration in which the open sides of the first and second fixed conductive lines and the movable conductive line are linear and planar.

  In the variable delay line of the present invention, the open sides of the first and second fixed conductive lines and the movable conductive line are formed in a planar and concentric arc shape with a predetermined rotation axis as a center, and the movable conductive line It is also possible to adopt a configuration in which is supported so as to be slidable about the rotation axis.

  In the variable delay line of the present invention, the open sides of the first and second fixed conductive lines and the movable conductive line are three-dimensionally and concentrically formed around a predetermined rotation axis, and the movable conductive line is A configuration is also possible in which the rotary shaft is supported so as to be able to slide spirally.

  In the variable delay line of the present invention, the spiral dielectric substrate on which the first and second fixed conductive lines are formed has a screw structure, and the movable conductive line is supported by the screw structure. It is.

  In the variable delay line of the present invention, a configuration in which the pressurizing mechanism includes an elastic protrusion that selectively pressurizes the movable conductive line is also possible.

  In the variable delay line of the present invention, a configuration in which the pressurizing mechanism has an elastic protrusion made of an O-ring that selectively pressurizes the movable conductive line is also possible.

  In the variable delay line of the present invention having such a configuration, a ground conductor is formed on one surface of the dielectric substrate, and the first and second fixed conductive lines are formed on the opposing surface of the dielectric substrate so as to face the ground conductor. Are formed in a band shape at equal intervals, and a strip-shaped movable conductive line formed in a U-shape from a thin flexible conductor on a flexible substrate, the first and second fixed conductive lines on both open sides. The movable guide line is supported by a pressurizing mechanism having an insulating elastic body that is slidably supported in the length direction of the first and second fixed guide lines in a state in which the bent portion side is projected. The first and second fixed conductive lines are pressurized and the movable conductive line portion protruding from the first and second fixed conductive lines is pressed so as to contact the dielectric substrate.

  Therefore, the delay time can be adjusted with high resolution even for ultra-high-speed pulse signals, and good surface contact between the fixed and movable conductors is obtained, and the characteristic impedance of the movable conductor protruding from the fixed conductor is obtained. Can be easily matched to that of the fixed conductor.

  In the present invention, in the configuration in which the open sides of the first and second fixed conducting lines and the movable conducting line are linear and planar, the delay time can be varied by varying the linear sliding of the movable conducting line. .

  In the present invention, the open sides of the first and second fixed conducting lines and the movable conducting line are formed in a planar and concentric arc shape with the rotation axis as the center, and the movable conducting line is supported so as to be rotatable and slidable. In the configuration, the delay time can be varied by changing the sliding direction of the movable conductive line.

  In the present invention, the open sides of the first and second fixed conducting lines and the movable conducting line are formed in a three-dimensional and concentric spiral shape around the rotation axis, and the movable conducting line can be slid in a spiral shape. In the supporting configuration, the delay time can be varied greatly.

  In the present invention, the screw structure is formed on the spiral dielectric substrate on which the first and second fixed conductive lines are formed, and the movable conductive line is supported by the screw structure. Is difficult to complicate.

  In the present invention, in the configuration in which the pressurizing mechanism has an elastic protrusion that selectively pressurizes the movable conductive line, the contact state between the first and second fixed conductive lines and the movable conductive line is made more reliable. Is possible.

  In the present invention, in the configuration in which the pressurizing mechanism has an elastic protrusion made of an O-ring that selectively pressurizes the movable conductive line, the first and second fixed conductive lines and the movable conductive line are simply configured. It is possible to further ensure the contact state.

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

  1 and 2 are a schematic exploded perspective view and a side view showing a first configuration according to the variable delay line of the present invention. In FIG. 2, adjustment means are additionally displayed.

  1 and 2, a ground conductor 25 is formed on the entire surface of one side (back surface) of a rectangular dielectric substrate 23.

  The first and second fixed conductive lines 27 and 29 are equidistant from one short side at a predetermined interval in one half region in the longitudinal direction on the opposing surface (front surface) of the dielectric substrate 23. Parallel) and along the longitudinal direction. The first and second fixed conductive lines 27 and 29 form a microstrip line having a characteristic impedance of 50Ω.

  The ground conductor 25 and the first and second fixed conductive lines 27 and 29 of the dielectric substrate 23 are easily formed of, for example, a double-sided printed circuit board material made of a dielectric resin having a good frequency characteristic.

  A rectangular U-shaped movable conductive line 33 (shown by a broken line in FIG. 1) is formed on one surface (back surface) of the insulating movable conductive line substrate 31 so as to overlap the first and second fixed conductive lines 27 and 29. .) Is formed. In the four corners of the movable conductive line substrate 31, movable conductive line connection holes 35 are formed to penetrate.

  The movable conductive line substrate 31 having the U-shaped movable conductive line 33 and the movable conductive line coupling hole 35 is easily formed from a flexible substrate called a so-called flexible substrate.

  The elastic body 37 is formed of an insulating elastic material such as silicon rubber so as to have substantially the same shape as the movable conductive line substrate 31, and elastic body connecting holes aligned with the movable conductive line connecting holes 35 at the four corners of the elastic body 37. 39 is formed through.

  The pressure moving plate 41 is formed from a rigid metal material or plastic material in substantially the same shape as the elastic body 37, and is formed at the four corners of the pressure moving plate 41 at the movable guide line connecting hole 35 and the elastic body connecting hole 39. The pressure moving plate connecting pin 43 is integrally provided so as to be aligned and project downward.

  The pressurizing moving plate connecting pin 43 of the pressurizing moving plate 41 is inserted and fixed in the elastic body connecting hole 39 and the movable guide line connecting hole 35 so that they are integrated to form a pressurizing mechanism 45.

  On the opposing surface (front surface) of the pressure moving plate 41, a pair of nuts 47 are integrally formed in the vicinity of the short sides facing each other in the longitudinal direction. As shown in FIG. 2, an adjusting screw 49 is screwed into the nut 47, and an adjusting means 51 is formed by the nut 47 and the adjusting screw 49.

  These constituent elements described above are accommodated in a case 52 having a sealed structure (only a portion corresponding to the cross section is indicated by a two-dot chain line). The case 52 has a configuration in which a lid is fixed to a flat box-like body, for example. In FIG. 2, the illustration of the pressure moving plate connecting pin 43 is omitted.

  The adjustment screw 49 is rotatably inserted so as to pass between the opposite side walls of the case 52, and does not move back and forth even if it rotates by means of a retaining ring or the like not shown. So that it is held.

  Then, due to the rotation of the adjusting screw 49, the elastic body 37 moves the first and second fixed conductive lines 27 and 29 and the dielectric substrate 23 while maintaining the gap G between the pressure moving plate 41 and the dielectric substrate 23. It can move while being pressurized.

  In the first configuration according to the variable delay line of the present invention, as shown in FIG. 2, the pressurizing mechanism 45 formed by the pressurization moving plate 41 and the elastic body 37 is provided with the movable conductive line substrate 31 and the movable guideline. The conductive line 33 is in pressure contact with the dielectric substrate 23 and the first and second fixed conductive lines 27 and 29, and the distance G between the lower surface of the pressure moving plate 41 and the upper surface of the dielectric substrate 23 is If the elastic body 37, the movable conductive line substrate 31 and the movable conductive line 33 are set to be smaller than the thickness thereof, the contact surfaces of the flexible movable conductive line substrate 31 and the movable conductive line 33 are deformed according to the unevenness, The movable conductive line 33 is in pressure contact with the dielectric substrate 23 and the first and second fixed conductive lines 27 and 29.

  That is, even if the movable conductive line substrate 31 and the movable conductive line 33 are deformed or the top surfaces of the first and second fixed conductive lines 27 and 29 and the dielectric substrate 23 are not completely flat, The movable conductive line 33 is brought into close contact with the first and second fixed conductive lines 27 and 29 and the dielectric substrate 23 by the pressure, and a good surface contact state is formed between them.

  Furthermore, since the movable conductive line 33 portion protruding from the first and second fixed conductive lines 27 and 29 is in surface contact with the dielectric substrate 23 in a good state by the pressurizing mechanism 45 and faces the ground conductor 25, The protruding movable conductive line 33 is a microstrip line having a characteristic impedance of about 50Ω.

  Then, by adjusting the rotation of the adjustment screw 49, the movable conductive line substrate 31 and the movable conductive line 33 are moved forward and backward in the first and second fixed conductive lines 27 and 29, and the first and second fixed conductive lines 27, The delay characteristic corresponding to the protruding length of the movable conductive line 33 can be obtained from 29 as in the conventional configuration.

  In this first configuration, as shown in FIG. 1, when a pulse signal is applied to the end of the first fixed conductor 27 from a pulse signal source PG having an internal impedance R0 of 50Ω, the pulse signal is converted into the first fixed conductor. 27, the movable conductive line 33 and the second fixed conductive line 29 are output to the load resistance RL of 50Ω.

  The variable delay line of the first configuration can be applied to mass production technology of general electronic parts, can adjust delay time with high resolution even for ultra high-speed pulse signals of 5 GHz to 10 GHz, is inexpensive and It is small.

  Meanwhile, in the middle of the dielectric substrate 23, the movable conductive line 33 is deformed at the ends of the first and second fixed conductive lines 27 and 29, and there is a slight gap between the movable conductive line 33 and the dielectric substrate 23. It is formed.

  However, even if the thickness of the first and second fixed conductive lines 27 and 29 is about 18 μm, the thickness of the movable conductive line 33 is about 10 μm, and the moving distance of the movable conductive line 33 is about 10 mm, The ratio is 1/500 or less and is a very small region, and the voids are unlikely to be a problem in terms of characteristics. In FIG. 2, the deformation of the movable conductive line 33 is illustrated with emphasis.

  In addition to the synthetic resin, a ceramic material can be used as the material of the dielectric substrate 23, and an inexpensive variable delay line can be realized.

  If the dielectric substrate 23 is formed of a ceramic material having a high dielectric constant that cannot be obtained with a resin material, the delay time per unit length of the conductive line can be increased, so a variable delay line having a small size and a large variable delay time can be obtained. can get.

  Moreover, the flatness of the ceramic material is not good when it is fired, but the flatness of the dielectric substrate 23 does not become a problem in the variable delay line of the present invention, so that the flat surface can be used without polishing or the like. There are advantages.

  In the variable delay line configured as shown in FIG. 1, the elastic body 37 is a simple cube. However, for the purpose of effective pressurization, as shown in FIG. 3, the first and second fixings are made on the lower surface of the elastic body 37 so that only the portions requiring pressurization can be concentrated. A configuration in which a kamaboko-shaped (convex) protrusion 53 is provided along the conductive lines 27 and 29 is also possible.

  In such a configuration, pressurization along the first and second fixed conductive lines 27 and 29 is obtained, while pressurization to unnecessary portions other than the first and second fixed conductive lines 27 and 29 is obtained. There is an advantage that smooth variable operation can be expected.

  4 and 5 show a second configuration of the variable delay line according to the present invention, in which a U-shaped movable conductive line 55 made of an arc moves in an arc direction around a rotation shaft 57. FIG. . Note that the left half of FIG. 5 shows a cross section between A and P in FIG. 4, and the right half of FIG. 5 shows a cross section between P and B in FIG.

  4 and 5, a ground conductor (not shown in FIG. 4) 61 is formed on the entire lower surface of the rectangular dielectric substrate 59, and the central portion P of the rotation shaft 57 is formed on the upper surface of the dielectric substrate 59. Arc-shaped first and second fixed conducting lines 63 and 65 having a center are formed at equal intervals.

  The first and second fixed conductive lines 63 and 65 are formed on the left half of the dielectric substrate 59 in the drawing, but are not formed on the right half.

  The U-shaped movable conductive line 55 faces the first and second fixed conductive lines 63 and 65 with open sides formed in an arc shape at the same interval as the first and second fixed conductive lines 63 and 65. A movable conductive line substrate (indicated by a two-dot chain line in FIG. 4) 67 on which the movable conductive line 55 is formed is rotatably supported on the rotating shaft 57. Reference numeral 69 denotes an escape hole for the connecting pin 71 described later.

  A pressure rotary knob 73 is disposed on the movable conductive line substrate 67. On the surface facing the movable conductive line substrate 67 in the pressurizing rotary knob 73, there are two O-ring receiving grooves 75, 77 aligned on the locus of the first and second fixed conductive lines 63, 65. The first and second elastic body O-rings 79 and 81 are housed in the O-ring housing grooves 75 and 77, and a pressurizing mechanism 83 is formed.

  Therefore, the first and second elastic body O-rings 79 and 81 are positioned so as to overlap with the first and second fixed conducting lines 63 and 65, and the first and second elastic body O-rings 79 and 81 are disposed. The movable conducting line 55 is pressurized in the direction of the first and second fixed conducting lines 63 and 65. By this pressurization, as shown in FIG. 5, the first and second elastic body O-rings 79 and 81 and the movable conductive line substrate 67 are deformed on the left and right.

  That is, in FIG. 5, in the left half portion where the first and second fixed conducting lines 63 and 65 are present, the first and second elastic body O-rings 79 and 81 are greatly deformed. There is little deformation in the right half without the fixed conductive lines 63 and 65, and the movable conductive line substrate 67 is also deformed by the level difference.

  Two connecting pins (represented by a two-dot chain line in FIG. 5) 71 project downward from the center of the lower surface of the pressure rotary knob 73. The connecting pin 71 is inserted into a connecting hole (not shown) provided in the movable conductive line substrate 67 to connect the pressurizing mechanism 83 and the movable conductive line substrate 67, and the tip of the connecting pin 71 is a dielectric. The connecting pin escape hole 69 of the board is reached.

  Also in the second configuration, the above-described components are accommodated in the case 84 (only the portion corresponding to the cross section is shown by a two-dot chain line) in FIG. It is held so as to be rotatable in a state where it protrudes from the surface. The case 84 also has a configuration in which, for example, a flat box-shaped cylindrical body is covered and fixed.

  The pressure rotary knob 73 presses the movable conductive line substrate 67 to the first and second fixed conductive lines 63 and 65 and the dielectric substrate 59 via the first and second elastic body O-rings 79 and 81. I am letting.

  The through holes 85 at the ends of the first and second fixed conductive lines 63 and 65 are led out below the dielectric substrate 59 and connected to an input / output terminal (not shown).

  In this configuration, when the pressure rotation knob 73 is rotated, the movable conducting line substrate 67 connected by the connecting pin 71 is rotated integrally, and the movable conducting line 55 is also rotated to change the delay time.

  Since the first and second elastic body O-rings 79 and 81 do not need to rotate with the rotation of the pressure rotation knob 73, the configuration of the pressure mechanism 83 is simple, and the shape of the elastic body O-ring Is also easy to obtain.

  However, the variable delay line of the second configuration is simple in structure, easy to procure parts, and easy to assemble, but it is difficult to increase the rotation angle, so it is a trimmer application that adjusts the delay time slightly. Suitable for variable delay lines.

  The position of the movable conductive line 55 displayed in FIG. 4 is the position with the maximum delay time, and the overlap on the first and second fixed conductive lines 63 and 65 is the smallest. When the movable conducting line 55 is rotated counterclockwise, the delay time is reduced, and when the movable conducting line 55 is rotated by the maximum rotation angle, the delay time becomes the minimum position, and the movable conducting line 55 becomes the first and second fixed conducting lines 63. , 65 is the position that most overlaps.

  In this configuration, the maximum rotation angle D in FIG. 4 is less than 180 degrees, and the practical maximum rotation angle is about 160 degrees.

  Next, a third configuration relating to the variable delay line of the present invention will be described.

  As shown in FIGS. 6 and 7, the third configuration has a three-dimensional spiral three-dimensional configuration, and a large variable delay time per unit volume can be obtained.

  6 is a development view of a spiral main part, and FIG. 7 is a longitudinal sectional view of a variable delay line. FIG. 6 and FIG. 6 show where the main part of FIG. 6 corresponds to in FIG. 7, the same symbols Q, R, S, T, and U are displayed.

  6 and 7, the dielectric substrate 87 is formed in a slender strip shape having an inclination, and the first and second fixed conductive lines 89 and 91 are formed along the longitudinal direction of the dielectric substrate 87 in the left half of the figure. Are formed at equal intervals.

  A U-shaped movable conductive line substrate (represented by a two-dot chain line in the figure) 93 is located along the longitudinal direction on the right half of the dielectric substrate 87, and a similar movable conductive line 95 is provided on one side thereof. Is formed.

  The tip of the movable conductive line 95 on the open side is in contact with the right side of the first and second fixed conductive lines 89 and 91 so that the movable conductive line substrate 93 is connected to both ends of the movable conductive line substrate 93. A plurality of holes 97 are formed.

  That is, the movable conductive line 95 shown in FIG. 6 is at the position with the maximum delay time, and the overlap on the first and second fixed conductive lines 89 and 91 is the smallest.

  In FIG. 7, the ground conductor 99 is formed in a cylindrical shape from a conductive material and also serves as a case of the variable delay line main body. The longest dielectric substrate 87 in FIG. 6 is formed on the inner wall of the ground conductor 99. It is formed upward from the Q point on the lower left side of the inner surface to the symbols R, S, T, U in a spiral shape.

  In the spiral dielectric substrate 87, the upper and lower positional relations rotated by one turn are arranged at a slight interval to form a spiral recess, and this recess serves as the spiral female screw 101.

  The pressure rotation knob 103 is formed in a cylindrical shape from, for example, an insulating synthetic resin and is rotatably fitted in a cylindrical ground conductor 99. A convex thread 105 that fits the female screw 101 is formed on the outer periphery thereof. It is formed in a spiral shape and is located at the uppermost position at the maximum delay time.

  A spiral recess is formed between the convex threads 105 of the pressurizing rotary knob 103, and a spiral elastic body 107 is arranged to form a pressurizing mechanism 109.

  The above-described movable conductive line connection hole 97 formed in the movable conductive line substrate 93 is pressurized by a connection pin (not shown) arranged at a position where the convex thread 105 is lowered in the pressure rotary knob 103. The rotary knob 103 is connected. When the pressure rotation knob 103 is rotated, the movable conductive line substrate 93 and the movable conductive line 95 are rotated together.

  The first and second fixed conducting lines 89 and 91 on the spirally formed dielectric substrate 87 are present at three locations Q, R, and S, and the movable conducting line 95 and the movable conducting line substrate are provided. 93 exists in three places, S, T, and U.

  That is, at the point S, the movable conductive line 95 overlaps with the first and second fixed conductive lines 89 and 91, and the movable conductive line 95 is in direct contact with the dielectric substrate 87 at reference characters T and U.

  The spiral elastic body 107 has a protrusion 111 at a location that coincides with the movable conductive line 95, and the movable conductive line 95 is effectively pressed against the first and second fixed conductive lines 89 and 91.

  Then, when the pressure rotary knob 103 is rotated counterclockwise, the pressure rotary knob 103 descends from the top position with the maximum delay time shown in FIG. 7, and the first and second fixed conductive lines 89 of the movable conductive line 95, The overlap with 91 increases, and the delay time decreases accordingly.

  FIG. 7 shows an example in which the rotation angle of the pressure knob 103 is 360 degrees, but in this three-dimensional structure, the rotation angle can be easily increased and decreased, and the variable delay time can be easily increased and decreased.

  In such a third configuration, the female screw 101 formed of the dielectric substrate 87 is configured between the dielectric substrates 87, but the female screw is formed with the space between the first and second fixed conducting lines 89 and 91 as a space. Is also possible.

  In this configuration, it is not necessary to provide four ears at both ends of the movable conductive line substrate 93, and two movable conductive line connecting holes 97 may be formed on the left and right of the center line of the movable conductive line substrate 93, one in total. It is possible to simplify the configuration.

  In FIG. 7, the female screw 101 is formed by the dielectric substrate 87, but it is also possible to reversely form the male screw and the female screw by the pressure rotation knob 103.

  Further, FIG. 7 shows a configuration in which the ground conductor 99 also serves as a variable delay line case. However, when an electrical insulator is desired on the outer wall as an electronic component, a synthetic resin can be molded to form a case, and a female screw can be formed on the inner surface.

  In this configuration, if a flexible flexible substrate is used as the dielectric substrate 87, the spiral dielectric substrate 87 and the first and second fixed conductive lines 89 and 91 can be easily formed.

  In short, according to the pressurizing mechanism 109 of the present invention, a variable delay line can be formed even if the dielectric substrate 87 and the first and second fixed conductive lines 89 and 91 are flexible. Various configurations are possible for the purpose of use.

It is a schematic exploded perspective view which shows the 1st structure concerning the variable delay line of this invention. It is a side view of the variable delay line of FIG. FIG. 2 is a cross-sectional view of a main part showing an application example of the variable delay line of FIG. 1. It is a schematic plan view which shows the 2nd structure which concerns on the variable delay line of this invention. FIG. 5 is a schematic longitudinal sectional view of the variable delay line in FIG. 4. It is a principal part expanded view which shows the 3rd structure concerning the variable delay line of this invention. FIG. 7 is a schematic longitudinal sectional view of the variable delay line in FIG. 6. FIG. 3 is a schematic exploded perspective view of a variable delay line that serves as a reference for the present invention. FIG. 9 is a side view of the variable delay line in FIG. 8.

DESCRIPTION OF SYMBOLS 1 Fixed side ground conductor 3 Dielectric layer 5, 27, 63, 89 1st fixed conducting line 7, 29, 65, 91 2nd fixed conducting line 9, 31, 67, 93 Movable conducting line board 11, 33, 55, 95 Movable conductor 13 Fixed side ground conductor (Coplanar ground conductor)
15 movable side ground conductors 17 and 47 nuts 19 and 49 adjusting screws 21 and 51 adjusting means 23, 59 and 87 dielectric substrates 25, 61 and 99 ground conductors 35 and 97 movable conducting line connecting hole 37 elastic body 39 elastic body connecting hole 41 Pressure moving plate 43 Pressure moving plate connecting pin 45, 83, 109 Pressing mechanism 52, 84 Case 53, 111 Protrusion 57 Rotating shaft 69 Connecting pin relief hole 71 Connecting pin 73, 103 Pressing rotary knob 75, 77 O Ring housing groove 79 First elastic body O-ring (elastic body)
81 Second elastic body O-ring (elastic body)
85 Through-hole 101 Female thread 105 Convex thread 107 Spiral elastic body RL Load resistance PG Pulse signal source

Claims (7)

A dielectric substrate having a ground conductor on one side;
First and second fixed conductive lines formed in strips at equal intervals on the opposing surface of the dielectric substrate so as to face the ground conductor;
A strip-shaped movable conductive line formed in a U shape from a flexible thin conductor on a flexible substrate, wherein both open sides of the strip-shaped movable conductive line are in contact with the first and second fixed conductive lines And a movable conductive line supported so as to be slidable in the length direction of the first and second fixed conductive lines in a state of projecting the bent portion side of the strip-shaped movable conductive line ,
The movable conductive line is pressed against the first and second fixed conductive lines, and the movable conductive line portion protruding from the first and second fixed conductive lines is brought into contact with the dielectric substrate. A pressurizing mechanism having an insulating elastic body that pressurizes
A variable delay line comprising:   2. The variable delay line according to claim 1, wherein open sides of the first and second fixed conductive lines and the movable conductive line are formed in a linear shape and a planar shape.   The open sides of the first and second fixed conductive lines and the movable conductive line are formed in a planar and concentric arc shape with a predetermined rotational axis as a center, and the movable conductive line is centered on the rotational axis. 2. The variable delay line according to claim 1, wherein the variable delay line is supported so as to be rotatable and slidable.   The open sides of the first and second fixed conductive lines and the movable conductive line are three-dimensionally and concentrically formed around a predetermined rotation axis, and the movable conductive line is centered on the rotational axis. 2. The variable delay line according to claim 1, wherein the variable delay line is slidably supported in a spiral shape.   The variable dielectric according to claim 4, wherein the spiral dielectric substrate on which the first and second fixed conductive lines are formed has a screw structure, and the movable conductive line is slidably supported on the screw structure. Delay line.   The variable delay line according to claim 1, wherein the pressurizing mechanism includes an elastic protrusion that selectively pressurizes the movable conductive line.   The variable delay line according to claim 3, wherein the pressurizing mechanism has an elastic protrusion made of an O-ring that selectively pressurizes the movable conductive line.

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