RIGHT-ANGLED COUPLER AND NOISE REDUCTION SECTION

Abstract

A right-angle coupler comprises: a first signal terminal (31) for a differential signal, comprising a first section (31a) and a second section (31b) bent over a bent section (31c), and assigned to one of the differential signals; a second signal terminal (32) for a differential signal, comprising a first section (32a) and a second section (32b) bent over a bent section (32c), and assigned to another of the differential signals, the second signal terminal (32) for a differential signal having a shorter overall length than the overall length of the first signal terminal (31) for a differential signal; a ground terminal (33) comprising a first section (33a) and a second section (33b) bent over a bent section (33c), and assigned for grounding;and a first noise reduction part (40) to increase a parasitic capacitance between the second signal terminal (32) for a differential signal and the ground terminal (33), wherein the first noise reduction part (40) is arranged between the first section (32a) located on one side of a bent section (32c) of the second signal terminal (32) for a differential signal and the first section (33a) located on one side of a bent section (33c) of the ground terminal (33).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a right angle coupler comprising three terminals assigned as two differential signal terminals of a differential pair and a ground terminal, and a noise reduction part attached to the right angle coupler. BACKGROUND TO THE STATE OF THE ART

[0002] A right-angle coupler that has a plurality of contacts with a plurality of length types and that solves a propagation delay difference between the contacts generated due to a difference between the lengths of the contacts is described in Patent Literature 1.

[0003] Patent Literature 1 describes a coupler that includes three rows of a signal contact, a ground contact, and a signal contact in order from an inner side in a pin-side housing, and has a lower permittivity of an insulating material on an outer side of a surface on which the ground contact is aligned and which serves as a boundary than the permittivity of an insulating material on an inner side to seal the insulating material in the coupler. REFERENCE LISTPATENT LITERATURE

[0004] Patent Literature 1: JP 11-329635 A SUMMARY OF THE INVENTIONTECHNICAL PROBLEM

[0005] In addition, the coupler described in Patent Literature 1 must be manufactured to seal the insulating materials for each type in the pin-side housing.

[0006] In addition, in Patent Literature 1, the assignment of differential signals of a positive and a negative signal to the terminals of the right-angle coupler is not described at all.

[0007] That is, in a case where terminals for the positive signal and the negative signal of the differential signals are assigned to the terminals of the right-angle coupler, there is a problem that a difference between the lengths of a terminal for the positive signal and a terminal for a negative signal deteriorates the degree of matching of the differential signals, a conversion amount of a differential signal into common-mode noise becomes larger, and noise radiated from the terminals increases.

[0008] At the same time, there is the problem that external common-mode noise is converted into a differential signal and the noise immunity deteriorates.

[0009] Patent Literature 1 does not describe a right-angle coupler that provides terminals for a positive signal and a negative signal of differential signals, nor does it describe the problem and solution.

[0010] The present disclosure has been made in light of the above point, and an object of the present disclosure is to provide a right-angle coupler which includes a first signal terminal for a differential signal assigned to one signal of the differential signal, a second signal terminal for a differential signal assigned to the other of the differential signals, and a ground terminal assigned to the ground, and which can suppress deterioration of the degree of matching of the differential signals by a simple structure and suppress radiated noise from the terminals. SOLUTION TO THE PROBLEM

[0011] A right-angle coupler according to the present disclosure, a right-angle coupler comprising: a first signal terminal for a differential signal, comprising a first portion and a second portion bent over a bent portion, and assigned for one of the differential signals; a second signal terminal for a differential signal, comprising a first portion and a second portion bent over a bent portion, and assigned for another of the differential signals, wherein the second signal terminal for a differential signal has a shorter overall length than an overall length of the first signal terminal for a differential signal; a ground terminal, comprising a first portion and a second portion bent over a bent portion, and provided for grounding;and a first noise reduction part for increasing a parasitic capacitance between the second signal terminal for the differential signal and the ground terminal, wherein the first noise reduction part is arranged between the first portion located on one side of the bent portion of the second signal terminal for the differential signal and the first portion located on one side of the bent portion of the ground terminal; ADVANTAGEOUS EFFECTS OF THE INVENTION

[0012] According to the present disclosure, it is possible to suppress deterioration in the degree of matching of a positive signal and a negative signal of differential signals and to suppress noise radiated from a terminal for the positive signal and a terminal for the negative signal in a right-angle coupler including the terminals provided for the differential signals. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram showing a right angle coupler according to Embodiment 1. Fig. 2 is a configuration diagram showing a right angle coupler according to Embodiment 2. Fig. 3 is a cross-sectional view showing a noise reduction part of a right angle coupler according to Embodiment 3. DESCRIPTION OF THE EMBODIMENTS Embodiment 1.

[0013] A right angle coupler according to Embodiment 1 is described with reference to Fig. 1 described.

[0014] The right-angle coupler according to Embodiment 1 includes a metal shield 10, a plurality of terminals 30, and a first noise reduction part 40.

[0015] The right-angle coupler according to Embodiment 1 is, for example, a D-sub coupler in which a plurality of connectors are arranged in two rows with an upper and a lower row on the left and right sides. In this context, the right-angle coupler can be applied to D-sub couplers with three or four rows on the top and bottom, RJ45 couplers, and USB couplers.

[0016] In short, as long as the plurality of terminals 30 include a first signal terminal 31 for a differential signal provided for one of the differential signals, a second signal terminal 32 for a differential signal provided for the other of the differential signals, and a ground terminal 33 provided for grounding, Embodiment 1 is applicable to all types of right-angle couplers.

[0017] Although in Fig. 1, only the first signal terminal 31 for a differential signal, the second signal terminal 32 for a differential signal, and the ground terminal 33 are illustrated as the plurality of terminals 30 to describe the features of the right angle coupler according to Embodiment 1, the plurality of terminals 30 may include terminals for other signals.

[0018] The metal shield 10 comprises a mounting plate 11 having a D-shaped opening in the center and a coupler portion 12 having a mounting surface facing the opening of the mounting plate 11.

[0019] Retaining portions of cables fit into the coupler portion 12, and the plurality of terminals 30 are connected to the corresponding cables on the coupler portion 12.

[0020] The back of the mounting plate 11 is in contact with the inner surface of a housing of an electronic device, and the mounting plate 11 is fixed on the housing of the electronic device by coupler fixing screws 20 on both sides of a lateral direction shown in Fig. 1, to secure the metal shield 10 to the housing of the electronic device.

[0021] The coupler portion 12 of the metal shield 10 protrudes from the housing of the electronic device.

[0022] A substrate having a wiring layer formed thereon is housed in the housing of the electronic device.

[0023] The wiring layer is formed either on the front, the back or an inner layer of the substrate.

[0024] As for the signal terminals for the differential signals, there is a case where the terminal 31 and the terminal 32 adjacent to the ground terminal 33 are assigned as the first signal terminal 31 for differential signals and the second signal terminal 32 for differential signals in terms of the relationship to the ground terminal 33, the arrangement of the cables, the relationship to the wiring layer of the substrate, and the like.

[0025] The first signal terminal 31 for the differential signal and the second signal terminal 32 for the differential signal are each a signal terminal for a positive or a negative signal of the differential signals.

[0026] For example, it is assumed that the first signal terminal 31 for the differential signal is assigned to the positive signal and the second signal terminal 32 for the differential signal is assigned to the negative signal.

[0027] The first signal terminal 31 for the differential signal comprises a first portion 31a and a second portion 31b which is bent over a bent portion 31c.

[0028] The distal end of the first portion 31a is electrically connected to a corresponding line connected to the coupler portion 12.

[0029] The distal end of the first portion 31a is held to the coupler portion 12 by a non-conductive terminal holding member.

[0030] The first portion 31a extends straight from the distal end, protrudes from the opening of the fixing plate 11 of the metal shield 10 and reaches the bent portion 31c.

[0031] The second portion 31b is bent at a right angle at the bent portion 31c, extends linearly from the bent portion 31c, and reaches the distal end.

[0032] The distal end of the second portion 31b penetrates a corresponding wiring layer formed on the surface of the substrate housed in the electronic device, and is electrically and mechanically connected to the corresponding wiring layer by soldering.

[0033] Although 31a denotes the first section and 31b the second section, 31a may denote the second section and 31b the first section.

[0034] Although the bent portion 31c is a point where the first portion 31a and the second portion 31b are bent at right angles, the first portion 31a and the second portion 31b may be bent at right angles at two points.

[0035] In a case where the first portion 31a and the second portion 31b are bent at right angles at the two points, a portion between the two points is the bent portion 31c.

[0036] The second signal terminal 32 for the differential signal comprises a first portion 32a and a second portion 32b which is bent over a bent portion 32c.

[0037] The distal end of the first portion 32a is electrically connected to a corresponding line connected to the coupler portion 12.

[0038] The distal end of the first portion 32a is held to the coupler portion 12 by a non-conductive terminal retaining member.

[0039] The first portion 32a extends straight from the distal end, protrudes from the opening of the fixing plate 11 of the metal shield 10 and reaches the bent portion 32c.

[0040] The second portion 32b is bent at a right angle at the bent portion 32c, extends linearly from the bent portion 32c, and reaches the distal end.

[0041] The distal end of the second portion 32b penetrates a corresponding wiring layer formed on the surface of the substrate housed in the electronic device, and is electrically and mechanically connected to the corresponding wiring layer by soldering.

[0042] Although 32a denotes the first section and 32b the second section, 32a may denote the second section and 32b the first section.

[0043] Although the bent portion 32c is a point where the first portion 32a and the second portion 32b are bent at right angles, the first portion 32a and the second portion 32b may be bent at right angles at two points.

[0044] In a case where the first portion 32a and the second portion 32b are bent at right angles at the two points, a portion between the two points is the bent portion 32c.

[0045] The ground terminal 33 comprises a first portion 33a and a second portion 33b which is bent over a bent portion 33c.

[0046] The distal end of the first portion 33a is connected to the terminal portion 12 and grounded.

[0047] The distal end of the first portion 33a is held to the coupler portion 12 by a non-conductive terminal holding member.

[0048] The first portion 33a extends straight from the distal end, protrudes from the opening of the fixing plate 11 of the metal shield 10 and reaches the bent portion 33c.

[0049] The second portion 33b is bent at a right angle at the bent portion 33c, extends linearly from the bent portion 33c, and reaches the distal end.

[0050] The distal end of the second portion 33b penetrates a ground layer formed on the surface of the substrate housed in the electronic device and is electrically and mechanically connected to the ground layer by soldering.

[0051] Although 33a denotes the first section and 33b the second section, 33a may denote the second section and 33b the first section.

[0052] Although the bent portion 33c is a point where the first portion 33a and the second portion 33b are bent at right angles, the first portion 33a and the second portion 33b may be bent at right angles at two points.

[0053] In a case where the first portion 33a and the second portion 33b may be bent at right angles at the two points, a portion between the two points is the bent portion 33c.

[0054] The first signal terminal 31 for the differential signal is arranged in the two rows, the second signal terminal 32 for the differential signal is arranged in the row below the two rows, and the ground terminal 33 is arranged in the two rows and next to the first signal terminal 31 for the differential signal.

[0055] That is, the first portion 31a of the first differential signal terminal 31, the first portion 32a of the second differential signal terminal 32, and the first portion 33a of the ground terminal 33 are located at the vertices of an equilateral triangular cross-section of a plane parallel to the opening surface of the mounting plate 11. There is also a case where the cross-section is a triangle rather than an equilateral triangle.

[0056] Furthermore, the second portion 31b of the first differential signal terminal 31, the second portion 32b of the second differential signal terminal 32, and the second portion 33b of the ground terminal 33 are located at the vertices of the equilateral triangular cross-section of the plane parallel to the plane containing the first portion 31a of the first differential signal terminal 31 and the first portion 33a of the ground terminal 33. There is also a case where the cross-section is a triangle rather than an equilateral triangle.

[0057] Therefore, in a case where the cross section is an equilateral triangle, the distance between the first portion 31a of the first signal terminal 31 for the differential signal and the first portion 33a of the ground terminal 33 and the distance between the first portion 32a of the second signal terminal 32 for the differential signal and the first portion 33a of the ground terminal 33 are the same.

[0058] Similarly, in a case where the cross section is an equilateral triangle, the distance between the second portion 31b of the first signal terminal 31 for the differential signal and the second portion 33b of the ground terminal 33 and the distance between the second portion 32b of the second signal terminal 32 for the differential signal and the second portion 33b of the ground terminal 33 are the same.

[0059] In short, the distance between the first signal terminal 31 for the differential signal and the ground terminal 33 and the distance between the second signal terminal 32 for the differential signal and the ground terminal 33 are as equal as possible to prevent deterioration of the degree of matching of the differential signals.

[0060] However, since the second differential signal terminal 32 is assigned to the row below the first differential signal terminal 31, the first portion 32a of the second differential signal terminal 32 is shorter than the first portion 31a of the first differential signal terminal 31 at the portion reaching the bent portion 32c.

[0061] In addition, the second portion 32b of the second signal terminal 32 for the differential signal is shorter than the second portion 31b of the first signal terminal 31 for the differential signal at the portion reaching the bent portion 32c.

[0062] Consequently, the total length of the second signal terminal 32 for the differential signal is shorter than the total length of the first signal terminal 31 for the differential signal.

[0063] It should be noted that each of a part of the first portion 32a of the second signal terminal 32 for the differential signal reaching the bent portion 32c, a portion of the first portion 31a of the first signal terminal 31 for the differential signal reaching the bent portion 31c, and a portion of the second portion 32b of the second signal terminal 32 for the differential signal reaching the bent portion 32c and a portion of the second portion 31b of the first signal terminal 31 for a differential signal reaching the bent portion 31c is a portion where the lengths of the two terminals are different, that is, a portion where there is a difference between the lengths of the two terminals.

[0064] When one of the differential signals is caused to flow to the first differential signal terminal 31 and the other of the differential signals is caused to flow to the second differential signal terminal 32 in a state where the entire length of the second differential signal terminal 32 is shorter than the entire length of the first differential signal terminal 31, the lengths of the first differential signal terminal 31 and the second differential signal terminal 32 are different, and therefore the degree of matching of the differential signals deteriorates particularly in the portion where the difference between the lengths of the two terminals exists.

[0065] In other words, the parasitic capacitance between the second signal terminal 32 for the differential signal and the ground terminal 33 is smaller than the parasitic capacitance between the first signal terminal 31 for the differential signal and the ground terminal 33, and therefore the degree of matching of the differential signals deteriorates.

[0066] As the degree of matching of the differential signals deteriorates, the amount of conversion from a differential signal to common-mode noise increases, and the noise radiated from the first differential signal terminal 31 and the second differential signal terminal 32 increases. At the same time, external common-mode noise is converted into a differential-mode signal, thereby deteriorating noise immunity.

[0067] The right-angle coupler according to Embodiment 1 includes the first noise reduction part 40 to suppress deterioration of the degree of matching of the differential signals due to a difference between the lengths of the first signal terminal 31 for the differential signal and the second signal terminal 32 for the differential signal, particularly, deterioration of the degree of matching of the differential signals at a portion where the lengths of the two terminals are different.

[0068] The first noise reduction part 40 is arranged between a part near the bent portion 32c of the first portion 32a of the second signal terminal 32 for the differential signal and a part near the bent portion 33c of the first portion 33a of the ground terminal 33, and increases a parasitic capacitance between the second signal terminal 32 for the differential signal and the ground terminal 33.

[0069] The first noise reduction part 40 is continuously inserted between a part near the bent portion 32c of the second portion 32b of the second signal terminal 32 for the differential signal and a part near the bent portion 33c of the second portion 33b of the ground terminal 33.

[0070] The first noise reduction part 40 ensures that the parasitic capacitance between the second signal terminal 32 for the differential signal and the ground terminal 33 is equal to the parasitic capacitance between the first signal terminal 31 for the differential signal and the ground terminal 33.

[0071] The first noise reduction part 40 serves to make the parasitic capacitance between the second signal terminal 32 for the differential signal and the ground terminal 33 equal to the parasitic capacitance between the first signal terminal 31 for the differential signal and the ground terminal 33, particularly in a portion where there is a difference between the lengths of the second signal terminal 32 for the differential signal and the first signal terminal 31 for the differential signal, so that deterioration of the degree of matching of the differential signals is suppressed.

[0072] This makes it possible to suppress an increase in radiated noise from the first signal terminal 31 for the differential signal and the second signal terminal 32 for the differential signal and a deterioration in noise immunity.

[0073] The first noise reduction part 40 is provided between the second signal terminal 32 for the differential signal and the ground terminal 33 at a portion where there is a difference between the lengths of the second signal terminal 32 for the differential signal and the first signal terminal 31 for the differential signal, that is, at the bent portion 32c.

[0074] The first noise reduction part 40 is made of, for example, a dielectric having a higher permittivity than air.

[0075] The first noise reduction part 40 ensures that the permittivity between the second signal terminal 32 for the differential signal and the ground terminal 33 is different from, ie, higher than, the permittivity between the first signal terminal 31 for the differential signal and the ground terminal 33.

[0076] Next, a specific configuration of the first noise reduction part 40 will be described.

[0077] The first noise reduction part 40 is a sponge-like material that penetrates the second signal terminal 32 for the differential signal, is attached to the second signal terminal 32 for the differential signal, and has a higher permittivity than air.

[0078] By using the spongy material as the first noise reducing part 40, it is possible to let the spongy material penetrate into the second differential signal terminal 32 and the ground terminal 33 and to fix the spongy material at the positions of the bent portion 32c and the bent portion 33c after the first differential signal terminal 31, the second differential signal terminal 32, and the ground terminal 33 are assigned in the right-angle coupler.

[0079] In addition, the first noise reduction part 40 is a thermoplastic resin or a thermosetting resin, which is attached to the second signal terminal 32 for the differential signal.

[0080] By using the thermoplastic resin or the thermosetting resin as the first noise reducing part 40, it is possible to insert and fix the thermoplastic resin or the thermosetting resin between the positions of the bent portion 32c of the second signal terminal 32 for the differential signal and the bent portion 33c of the ground terminal 33 after the first signal terminal 31 for the differential signal, the second signal terminal 32 for the differential signal, and the ground terminal 33 are assigned in the right-angle coupler.

[0081] The first noise reduction member 40 is the dielectric, and the first noise reduction member 40, which is the dielectric, is inserted between the bent portion 32c of the second signal terminal 32 for the differential signal and the bent portion 33c of the ground terminal 33 by a noise reduction member holding member such as the thermosetting resin, the thermoplastic resin, or a string, and is fixed to the bent portion 32c of the second signal terminal 32 for the differential signal.

[0082] By fixing the first noise reduction part 40 to the bent portion 32c of the second differential signal terminal 32 by the noise reduction part holding member, it is possible to fix the first noise reduction part 40 to the bent portion 32c of the second differential signal terminal 32 after the first differential signal terminal 31, the second differential signal terminal 32, and the ground terminal 33 are assigned in the right-angle coupler.

[0083] In short, even in the case of any first noise reduction part 40, the first noise reduction part 40 can be attached to the right-angle coupler according to Embodiment 1 after the right-angle coupler to which the first noise reduction part 40 is not yet attached is completed and after the first signal terminal 31 for differential signal, the second signal terminal 32 for differential signal, and the ground terminal 33 are assigned, and the first noise reduction part 40 can be mounted on a plurality of right-angle couplers using as standard products the right-angle couplers to which the first noise reduction part 40 is not yet attached, so that it is possible to reduce the man-hours required to complete the right-angle coupler according to Embodiment 1 and reduce the manufacturing cost.

[0084] As described above, the right-angle coupler according to Embodiment 1 includes the first differential signal terminal 31 provided for one of the differential signals, the second differential signal terminal 32 provided for the other of the differential signals, and the ground terminal 33 provided for grounding. The first noise reduction part 40, which increases the parasitic capacitance between the second differential signal terminal 32 and the ground terminal 33, is provided at the first portion 32a located on the bent portion 32c side of the second differential signal terminal 32, the entire length of which is shorter than the entire length of the first differential signal terminal 31, so that it is possible to suppress deterioration in the degree of matching of the differential signals.which flow in the first signal terminal 31 for the differential signal and the second signal terminal 32 for the differential signal.,

[0085] This makes it possible to suppress an increase in radiated noise from the first signal terminal 31 for the differential signal and the second signal terminal 32 for the differential signal and a deterioration in noise immunity.

[0086] Furthermore, the first noise reduction part 40 can be mounted after the first signal terminal 31 for a differential signal, the second signal terminal 32 for a differential signal, and the ground terminal 33 are assigned to the right-angle coupler, so that it is possible to use a plurality of right-angle couplers to which the first noise reduction part 40 is not yet attached as standard products, and the right-angle coupler according to Embodiment 1 can reduce the man-hours and the manufacturing cost.

[0087] Note that the first noise reduction part 40 is arranged either in a portion between the part near the bent portion 32c of the first portion 32a of the second signal terminal 32 for the differential signal and the part near the bent portion 33c of the first portion 33a of the ground terminal 33, or in a portion between the part near the bent portion 32c of the second portion 32b of the second signal terminal 32 for the differential signal and the part near the bent portion 33c of the second portion 33b of the ground terminal 33. Embodiment 2.

[0088] A right angle coupler according to Embodiment 2 is described with reference to Fig. 2 described.

[0089] One difference is that, while the first noise reduction part 40 of the right-angle coupler according to Embodiment 1 is inserted from the portion between the part near the bent portion 32c of the first portion 32a of the second signal terminal 32 for a differential signal and the part near the bent portion 33c of the first portion 33a of the ground terminal 33 to the portion between the part near the bent portion 32c of the second portion 32b of the second signal terminal 32 for a differential signal and the part near the bent portion 33c of the second portion 33b of the ground terminal 33, the right-angle coupler according to Embodiment 2 includes a first noise reduction part 41,which is arranged between a part near a bent portion 32c of a first portion 32a of a second signal terminal 32 for a differential signal and a part near a bent portion 33c of a first portion 33a of a ground terminal 33, and a second noise reduction part 42 which is arranged between a part near a bent portion 32c of a second portion 32b of the second signal terminal 32 for a differential signal and a part near a bent portion 33c of a second portion 33b of the ground terminal 33, and the other points are the same.

[0090] It should be noted that in Fig. 2 the same reference numerals as in Fig. 1 refer to identical or corresponding sections.

[0091] In the following, the first noise reduction part 41 and the second noise reduction part 42 are mainly described.

[0092] The first noise reduction part 41 is arranged between a part near the bent portion 32c of the first portion 32a of the second signal terminal 32 for the differential signal and a part near the bent portion 33c of the first portion 33a of the ground terminal 33, and increases a parasitic capacitance between the second signal terminal 32 for the differential signal and the ground terminal 33.

[0093] At a portion where there is a difference between the lengths of the first portion 32a of the second differential signal terminal 32 and a first portion 31a of the first differential signal terminal 31, the first noise reduction part 41 has one side portion penetrating and fixed to the first portion 32a located on the bent portion 32c side of the second differential signal terminal 32, and the other side portion penetrating and fixed to the first portion 33a located on the bent portion 33c side of the ground terminal 33, and a parasitic capacitance between the first portion 32a located on the bent portion 32c side of the second differential signal terminal 32 and the first portion 33a located on the bent portion 33c side of the ground terminal 33, increased.

[0094] The second noise reduction part 42 is inserted between a part near the bent portion 32c of the second portion 32b of the second signal terminal 32 for the differential signal and a part near the bent portion 33c of the second portion 33b of the ground terminal 33, and increases a parasitic capacitance between the second signal terminal 32 for the differential signal and the ground terminal 33.

[0095] At a portion where there is a difference between the lengths of the second portion 32b of the second differential signal terminal 32 and a second portion 31b of the first differential signal terminal 31, the second noise reduction part 42 has one side portion penetrating and fixed to the second portion 32b located on the bent portion 32c side of the second differential signal terminal 32, and the other side portion penetrating and fixed to the second portion 33b located on the bent portion 33c side of the ground terminal 33, and a parasitic capacitance between the second portion 32b located on the bent portion 32c side of the second differential signal terminal 32 and the second portion 33b located on the bent portion 33c side of the ground terminal 33,increased.,

[0096] The first noise reduction part 41 and the second noise reduction part 42 serve to make the parasitic capacitance between the second signal terminal 32 for the differential signal and the ground terminal 33 equal to the parasitic capacitance between the first signal terminal 31 for the differential signal and the ground terminal 33.

[0097] The first noise reduction part 41 and the second noise reduction part 42 serve to make the parasitic capacitance between the second signal terminal 32 for the differential signal and the ground terminal 33 equal to the parasitic capacitance between the first signal terminal 31 for the differential signal and the ground terminal 33, particularly in a portion where there is a difference between the lengths of the second signal terminal 32 for the differential signal and the first signal terminal 31 for the differential signal, so that deterioration of the degree of matching of the differential signals is suppressed.

[0098] This makes it possible to suppress an increase in radiated noise from the first signal terminal 31 for the differential signal and the second signal terminal 32 for the differential signal and a deterioration in noise immunity.

[0099] The first noise reduction part 41 and the second noise reduction part 42 are made of, for example, a dielectric having a higher permittivity than that of air.

[0100] A specific configuration of the first noise reduction part 41 and the second noise reduction part 42 will be described below.

[0101] The first noise reduction part 41 and the second noise reduction part 42 each comprise a sponge-like material that penetrates the second signal terminal 32 for the differential signal and the ground terminal 33 at both side portions, is fixed to the second signal terminal 32 for the differential signal and the ground terminal 33, and has a higher permittivity than air.

[0102] In addition, the first noise reduction part 41 and the second noise reduction part 42 are each a thermoplastic resin or a thermosetting resin, which is attached to the second signal terminal 32 for the differential signal.

[0103] By using the thermoplastic resin or the thermosetting resin as the first noise reducing part 41 and the second noise reducing part 42, it is possible to penetrate the thermoplastic resin or the thermosetting resin into the second signal terminal 32 for the differential signal and the ground terminal 33 at both side portions and to fix the thermoplastic resin or the thermosetting resin to the second signal terminal 32 for the differential signal and the ground terminal 33 after the first signal terminal 31 for the differential signal, the second signal terminal 32 for the differential signal, and the ground terminal 33 are associated in the right-angle coupler.

[0104] In short, each of the first noise reduction part 41 and the second noise reduction part 42 is the sponge-like material, the thermoplastic resin or the thermosetting resin, the first noise reduction part 41 and the second noise reduction part 42 can be attached to the right-angle coupler according to Embodiment 2 after the right-angle coupler to which the first noise reduction part 41 and the second noise reduction part 42 are not yet attached is completed and after the first signal terminal 31 for a differential signal, the second signal terminal 32 for a differential signal and the ground terminal 33 are completed, and the first noise reduction part 41 and the second noise reduction part 42 can be mounted on a plurality of right-angle couplers, the right-angle couplers to which the first noise reduction part 41 and the second noise reduction part 42 are not yet attached,be used as standard products, so that it is possible to reduce the man-hours required to complete the right-angle coupler according to Embodiment 2 and reduce the manufacturing cost.

[0105] As described above, the right-angle coupler according to Embodiment 2 includes the first signal terminal 31 for a differential signal, the second signal terminal 32 for a differential signal associated with the other of the differential signals, and the ground terminal 33 associated with the ground, and the first noise reduction part 41 is provided at the first portion 32a located on the bent portion 32c side of the second signal terminal 32 for a differential signal, the entire length of which is shorter than the entire length of the first signal terminal 31 for a differential signal, and the second noise reduction part 42 is provided at the second portion 32b, and the first noise reduction part 41 and the second noise reduction part 42 increase the parasitic capacitance between the second signal terminal 32 for a differential signal and the ground terminal 33, so that it is possible toto suppress a deterioration of the degree of adjustment of the differential signals flowing in the first differential signal terminal 31 and the second differential signal terminal 32.,

[0106] This makes it possible to suppress an increase in radiated noise from the first signal terminal 31 for the differential signal and the second signal terminal 32 for the differential signal and a deterioration in noise immunity.

[0107] Furthermore, the first noise reduction part 41 and the second noise reduction part 42 can be mounted after the first signal terminal 31 for a differential signal, the second signal terminal 32 for a differential signal, and the ground terminal 33 are assigned to the right-angle coupler, so that it is possible to use as standard products a plurality of right-angle couplers to which the first noise reduction part 41 and the second noise reduction part 42 are not yet attached, and the right-angle coupler according to Embodiment 1 can reduce the man-hours and the manufacturing cost. Embodiment 3.

[0108] A right angle coupler according to Embodiment 3 is described with reference to Fig. 3 described.

[0109] Fig. 3 is a cross-sectional view showing a noise reduction part 40 of the right angle coupler according to Embodiment 3.

[0110] The noise reduction part 40 of the right-angle coupler according to the Fig. Embodiment 3 shown in Fig. 3 is applicable to the first noise reducing part 40 of the right angle coupler according to Embodiment 1 and the first noise reducing part 41 and the second noise reducing part 42 of the right angle coupler according to Embodiment 2.

[0111] Therefore, the noise reduction part 40 will be mainly described.

[0112] The noise reduction member 40 includes a non-conductive holding portion 40a including a first fixing portion 40a1 and a second fixing portion 40a2, and a noise reduction member 40b sandwiched between the first fixing portion 40a1 and the second fixing portion 40a2 of the holding portion 40a and having a permittivity higher than that of air.

[0113] The noise reduction part 40b is a dielectric that increases a parasitic capacitance between a second signal terminal 32 for a differential signal and a ground terminal 33 at a portion where there is a difference between the lengths of the second signal terminal 32 for a differential signal and a first signal terminal 31 for a differential signal, that is, at least a portion of a first portion and a second portion located on the side of a bent portion 32c.

[0114] The noise reduction part 40b has a rectangular planar shape as shown in Fig. 3, and has a shape in a longitudinal direction expressed as a straight line extending along a first portion 32a or a second portion 32b of the second differential signal terminal 32, or an L-shape extending along the first portion 32a and the second portion 32b of the second differential signal terminal 32.

[0115] The holding portion 40a is formed of a material whose permittivity is lower than that of the noise reducing part 40b and which is more flexible than that of the noise reducing part 40b.

[0116] The holding portion 40a has the central portion in which the noise reduction part 40b is installed, and includes the first fixing portion 40a1 and the second fixing portion 40a2 on both sides of the noise reduction part 40b.

[0117] The holding section 40a has an elliptical planar shape as shown in Fig.3, and has a shape in a longitudinal direction expressed as a straight line extending along the first portion 32a or the second portion 32b of the second differential signal terminal 32, or an L-shape extending along the first portion 32a and the second portion 32b of the second differential signal terminal 32.

[0118] The first fixing portion 40a1 of the holding portion 40a is a through-hole, the first fixing portion 40a1 penetrates the second differential signal terminal 32 at a portion where there is a difference between the lengths of the first portion 32a of the second differential signal terminal 32 and a first portion 31a of the first differential signal terminal 31, and the holding portion 40a is fixed to the second differential signal terminal 32 by, for example, an adhesive at the first fixing portion 40a1.

[0119] A position of the first fixing portion 40a1 of the holding portion 40a to be fixed to the second differential signal terminal 32 is the first portion 32a located on the bent portion 32c side of the second differential signal terminal 32, or the second portion 32b located on the bent portion 32c side, or the first portion 32a located on the bent portion 32c side and the second portion 32b located on the bent portion 32c side.

[0120] The second fixing portion 40a2 of the holding portion 40a is a through-hole, the second fixing portion 40a2 penetrates the ground terminal 33 at a portion where there is a difference between the lengths of the first portion 32a of the second signal terminal 32 for the differential signal and the first portion 31a of the first signal terminal 31 for the differential signal, and the holding portion 40a is fixed to the ground terminal 33 by, for example, an adhesive at the second fixing portion 40a2.

[0121] A position of the second fixing portion 40a2 of the holding portion 40a to be fixed to the ground terminal 33 is a first portion 33a located on a bent portion 33c side of the ground terminal 33, or a second portion 33b located on the bent portion 33c side, or the first portion 33a located on the bent portion 33c side and the second portion 33b located on the bent portion 33c side.

[0122] According to the noise reduction part 40 of the right-angle coupler according to Embodiment 3 configured as described above, the noise reduction part 40b embedded in the holding portion 40a and having a high permittivity can increase the parasitic capacitance between the second differential signal terminal 32 and the ground terminal in the portion where the difference between the lengths of the first portion 32a of the second differential signal terminal 32 and the first portion 31a of the first differential signal terminal 31 exists, and so it is possible to suppress deterioration of the degree of equalization of the differential signals flowing in the first differential signal terminal 31 and the second differential signal terminal 32.

[0123] Furthermore, the noise reduction part 40 of the right-angle coupler according to Embodiment 3 can be attached and fixed to the second signal terminal 32 for the differential signal and the ground terminal 33 by the holding portion 40a having flexibility at the portion where there is a difference between the lengths of the first portion 32a of the second signal terminal 32 for the differential signal and the first portion 31a of the first signal terminal 31 for the differential signal, so that the noise reduction part 40 has good processability and the noise reduction part 40 is easily attached to the second signal terminal 32 for the differential signal and the ground terminal 33.

[0124] It is obvious that in a case where the noise reduction part 40 of the right-angle coupler according to Embodiment 3 is applied to the first noise reduction part 40 of the right-angle coupler according to Embodiment 1 and the first noise reduction part 41 and the second noise reduction part 42 of the right-angle coupler according to Embodiment 2, the right-angle coupler according to Embodiment 3 has the same effect as the right-angle couplers according to Embodiment 1 and Embodiment 2.

[0125] It should be noted that the embodiments can be freely combined, any components in the embodiments can be changed, or any components in the embodiments can be omitted. INDUSTRIAL APPLICABILITY

[0126] The right-angle coupler according to the present disclosure is suitable for a right-angle coupler that performs high-speed transmission of differential signals between cables and a substrate housed in a package of an electronic device, and that electrically connects the cables and a wiring layer of the differential signals on the surface of the substrate housed in the package of the electronic device. LIST OF REFERENCE SYMBOLS

[0127] 10: Metal shield, 11: Mounting plate, 12: Coupler section, 20: Coupler fixing screw, 30: Connector, 31: First signal terminal for differential signal, 31a: First section, 31b: Second section, 31c: Bent section, 32: Second signal terminal for differential signal, 32a: First section, 32b: Second section, 32c: Bent section, 33: Ground terminal, 33a: First section, 33b: Second section, 33c: Bent section, 40 and 41: First noise reduction part, 42: Second noise reduction part, 40a: Holding section, 40a1: First fixing section, 40a2: Second fixing section, 40b: Noise reduction part QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 11-329635 A

[0004]

Claims

[1] Right-angle coupler comprising: a first signal terminal for a differential signal, including a first portion and a second portion bent over a bent portion, and assigned to one of differential signals; a second signal terminal for a differential signal comprising a first portion and a second portion bent over a bent portion and assigned to another one of the differential signals, the second signal terminal for a differential signal having a shorter total length than a total length of the first signal terminal for a differential signal; a ground terminal comprising a first portion and a second portion bent over a bent portion and intended for grounding; and a first noise reduction part for increasing a parasitic capacitance between the second signal terminal for a differential signal and the ground terminal, wherein the first noise reduction part is arranged between the first portion located on a side of a bent portion of the second signal terminal for a differential signal and the first portion located on a side of a bent portion of the ground terminal. [2] A right-angle coupler according to claim 1, wherein the first noise reduction part is continuously arranged between the second portion located on the bent portion side of the second signal terminal for a differential signal and the second portion located on the bent portion side of the ground terminal. [3] The right-angle coupler according to claim 1, further comprising a second noise reduction part for increasing the parasitic capacitance between the second signal terminal for a differential signal and the ground terminal, the second noise reduction part being arranged between the second portion located on the bent portion side of the second signal terminal for a differential signal and the second portion located on the bent portion side of the ground terminal. [4] A right-angle coupler according to any one of claims 1 to 3, wherein the first signal terminal for a differential signal has a distal end of the first section connected to a corresponding line through a coupler section, and a distal end of the second section penetrating a corresponding wiring layer formed in a substrate housed in an electronic device and connected to the corresponding wiring layer, the second signal terminal for a differential signal has a distal end of the first section connected to a corresponding line through the coupler section, and a distal end of the second section penetrating a corresponding wiring layer formed in the substrate housed in the electronic device and connected to the corresponding wiring layer, and the ground terminal has a distal end of the first portion connected to a corresponding line through the coupler portion, and a distal end of the second portion penetrating a corresponding wiring layer formed in the substrate housed in the electronic device and connected to the corresponding wiring layer. [5] A right-angle coupler according to any one of claims 1 to 3, wherein the first signal terminal for a differential signal has a distal end of the first portion penetrating a corresponding wiring layer formed in a substrate housed in an electronic device and connected to the corresponding wiring layer, and a distal end of the second portion connected to a corresponding line through a coupler portion, the second signal terminal for a differential signal has a distal end of the first section penetrating a corresponding wiring layer formed in the substrate housed in the electronic device and connected to the corresponding wiring layer, and a distal end of the second section connected to a corresponding line through the coupler section, and the ground terminal has a distal end of the first portion penetrating a corresponding wiring layer formed in the substrate housed in the electronic device and connected to the corresponding wiring layer, and a distal end of the second portion connected to a corresponding line through the coupler portion. [6] Right-angle coupler comprising: a first signal terminal for a differential signal, including a first portion and a second portion bent over a bent portion, and assigned to one of differential signals; a second signal terminal for a differential signal comprising a first portion and a second portion bent over a bent portion and assigned to another one of the differential signals, the second signal terminal for a differential signal having a shorter total length than a total length of the first signal terminal for a differential signal; a ground terminal comprising a first portion and a second portion bent over a bent portion and intended for grounding; and a first noise reduction part arranged between the first portion located on the bent portion side of the second signal terminal for a differential signal and the first portion located on the bent portion side of the ground terminal and having a permittivity higher than the permittivity of air. [7] A right angle coupler according to claim 6, wherein the first noise reducing member is made of a sponge-like material penetrating the second signal terminal for a differential signal and fixed to the second signal terminal for a differential signal. [8] A right-angle coupler according to claim 6, wherein the first noise reduction member is made of a thermoplastic resin or a thermosetting resin, which is fixed to the second signal terminal for the differential signal. [9] A right angle coupler according to claim 6, wherein the first noise reduction part is fixed to the second signal terminal for a differential signal by a noise reduction part holding member. [10] A right-angle coupler according to claim 6, wherein the first noise reduction member comprises a non-conductive holding portion having a first fixing portion penetrating and fixed to the second signal terminal for a differential signal and a second fixing portion penetrating and fixed to the ground terminal, and a noise reduction member installed between the first fixing portion and the second fixing portion of the holding portion and having a permittivity higher than the permittivity of air. [11] A right-angle coupler according to any one of claims 6 to 10, wherein the first noise reduction part is continuously arranged between the second portion located on the bent portion side of the second signal terminal for a differential signal and the second portion located on the bent portion side of the ground terminal. [12] A right-angle coupler according to any one of claims 6 to 10, further comprising a second noise reduction part disposed between the second portion located on the bent portion side of the second signal terminal for a differential signal and the second portion located on the bent portion side of the ground terminal, and having a permittivity higher than the permittivity of air. [13] A right-angle coupler according to any one of claims 6 to 10, wherein the first signal terminal for a differential signal has a distal end of the first section connected to a corresponding line through a coupler section, and a distal end of the second section penetrating a corresponding wiring layer formed in a substrate housed in an electronic device and connected to the corresponding wiring layer, the second signal terminal for a differential signal has a distal end of the first section connected to a corresponding line through the coupler section, and a distal end of the second section penetrating a corresponding wiring layer formed in the substrate housed in the electronic device and connected to the corresponding wiring layer, and the ground terminal has a distal end of the first portion connected to a corresponding line through the coupler portion, and a distal end of the second portion penetrating a corresponding wiring layer formed in the substrate housed in the electronic device and connected to the corresponding wiring layer. [14] A right-angle coupler according to any one of claims 6 to 10, wherein the first signal terminal for a differential signal has a distal end of the first section penetrating a corresponding wiring layer formed in a substrate housed in an electronic device and connected to the corresponding wiring layer, and a distal end of the second section connected to a corresponding line through a coupler section, the second signal terminal for a differential signal has a distal end of the first section penetrating a corresponding wiring layer formed in the substrate housed in the electronic device and connected to the corresponding wiring layer, and a distal end of the second section connected to a corresponding line through the coupler section, and the ground terminal has a distal end of the first portion penetrating a corresponding wiring layer formed in the substrate housed in the electronic device and connected to the corresponding wiring layer, and a distal end of the second portion connected to a corresponding line through the coupler portion. [15] A noise reduction part mounted on a right-angle coupler, comprising: a first signal terminal for a differential signal, comprising a first portion and a second portion bent over a bent portion, and assigned for one of the differential signals; a second signal terminal for a differential signal, comprising a first portion and a second portion bent over a bent portion, and assigned for another of the differential signals, the second signal terminal for a differential signal having a shorter total length than a total length of the first signal terminal for a differential signal; a ground terminal, comprising a first portion and a second portion bent over a bent portion, and assigned for grounding, the noise reduction part comprising: a non-conductive holding portion having a first fixing portion penetrating and fixed to the second signal terminal for a differential signal, and a second fixing portion penetrating and fixed to the ground terminal; and a noise reduction member embedded between the first fixing portion and the second fixing portion of the holding portion and having a permittivity higher than the permittivity of air. [16] The noise reduction member according to claim 15, wherein the holding portion is made of a material having a lower permittivity than the permittivity of the noise reduction member and having a greater flexibility than the flexibility of the noise reduction member.

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