Laminated triplexer
阅读说明:本技术 层叠型三工器 (Laminated triplexer ) 是由 中岛康裕 于 2019-02-22 设计创作,主要内容包括:本发明提供一种抑制在某频带中混入其他的频带的信号的层叠型三工器。在共用端子与第一滤波器之间连接第一线圈(L1),在共用端子与第二滤波器之间连接第二线圈(L2),在共用端子与第三滤波器之间连接第三线圈(L3),第一线圈(L1)、第二线圈(L2)、第三线圈(L3)分别具有形成于层叠体的基材层的层间的线圈导体图案,在沿基材层的层叠方向透视层叠体时,第一线圈(L1)的线圈导体图案、第二线圈(L2)的线圈导体图案、以及第三线圈(L3)的线圈导体图案配置于不互相重叠的位置。(The invention provides a laminated triplexer which can restrain signals of other frequency bands from being mixed in a certain frequency band. A first coil (L1) is connected between the common terminal and the first filter, a second coil (L2) is connected between the common terminal and the second filter, a third coil (L3) is connected between the common terminal and the third filter, the first coil (L1), the second coil (L2), and the third coil (L3) each have a coil conductor pattern formed between layers of the base material layers of the laminate, and the coil conductor pattern of the first coil (L1), the coil conductor pattern of the second coil (L2), and the coil conductor pattern of the third coil (L3) are arranged at positions that do not overlap when the laminate is seen through in the lamination direction of the base material layers.)
1. A laminated triplexer includes:
a laminate in which a plurality of base material layers are laminated;
a common terminal, a first branch terminal, a second branch terminal, and a third branch terminal formed on a surface of the laminate; and
a first filter, a second filter, and a third filter formed inside the laminated body,
the first filter is connected in a path between the common terminal and the first branch terminal,
the second filter is connected in a path between the common terminal and the second branch terminal,
the third filter is connected to a path between the common terminal and the third branch terminal, and
a first coil is connected between the common terminal and the first filter,
a second coil is connected between the common terminal and the second filter,
a third coil is connected between the common terminal and the third filter,
the first coil, the second coil, and the third coil each have a coil conductor pattern formed between layers of the base material layers of the laminate,
when the laminate is viewed from the laminating direction of the base material layers, the coil conductor pattern of the first coil, the coil conductor pattern of the second coil, and the coil conductor pattern of the third coil are arranged at positions that do not overlap each other.
2. The laminated triplexer of claim 1 wherein,
the first coil, the second coil, and the third coil each have a winding axis parallel to the lamination direction of the base material layer.
3. The lamination type triplexer according to claim 1 or 2, wherein,
the coil conductor pattern of at least one of the first, second, and third coils includes: a first coil conductor pattern and a second coil conductor pattern each formed in a U-shape, wherein the first coil conductor pattern and the second coil conductor pattern are formed respectively between different layers of the base material layer,
when the laminate is viewed from the laminating direction of the base material layers,
the first coil conductor pattern has: a portion overlapping with the second coil conductor pattern in the width direction and a portion not overlapping with the second coil conductor pattern in the width direction,
the second coil conductor pattern has: a portion overlapping with the first coil conductor pattern in the width direction, and a portion not overlapping with the first coil conductor pattern in the width direction.
4. The laminated triplexer as claimed in any one of claims 1-3, wherein,
when the laminate is viewed from the laminating direction of the base material layers,
the coil conductor pattern of the first coil, the second coil, and the third coil, the area of the region surrounded by the coil conductor pattern of which is the largest, includes: a third coil conductor pattern and a fourth coil conductor pattern each formed in a U-shape, wherein the third coil conductor pattern and the fourth coil conductor pattern are formed respectively between different layers of the base material layer,
the third coil conductor pattern and the fourth coil conductor pattern overlap in a width direction.
5. The laminated triplexer as claimed in any one of claims 1-4, wherein,
the first filter, the second filter and the third filter are LC filters respectively.
Technical Field
The present invention relates to a laminated triplexer including a multilayer substrate in which a plurality of base material layers are laminated.
Background
Triplexers are widely used in electronic devices such as mobile communication devices represented by mobile phones and smart phones. For example, patent document 1(WO 2008/075691) discloses a triplexer. Fig. 9 shows a triplexer 1000 disclosed in patent document 1.
The triplexer 1000 includes a common terminal Pc, a first branch terminal P1, a second branch terminal P2, and a third branch terminal P3.
The triplexer 1000 includes a first band-pass filter unit bpf1 of a low band, a second band-pass filter unit bpf2 of an intermediate band, and a third band-pass filter unit bpf3 of a high band. The triplexer 1000 includes 2 phase adjusting circuits Y1 and Y2. The triplexer 1000 includes a first parallel resonant circuit X1, a second parallel resonant circuit X2, and a third parallel resonant circuit X3.
The first parallel resonant circuit X1, the second parallel resonant circuit X2, and the third parallel resonant circuit X3 are each configured by connecting a coil and a capacitor in parallel, and function to adjust impedance.
In the triplexer 1000, a first parallel resonant circuit X1, a phase adjustment circuit Y1, and a first band pass filter unit bpf1 are connected in this order as a low-band signal path between the common terminal Pc and the first branch terminal P1. Further, a second parallel resonant circuit X2, a phase adjustment circuit Y2, and a second band-pass filter unit bpf2 are connected in this order as a signal path of an intermediate frequency band between the common terminal Pc and the second branch terminal P2. Further, a third parallel resonant circuit X3 and a third band pass filter unit bpf3 are connected in this order as a high-frequency-band signal path between the common terminal Pc and the third branch terminal P3.
Patent document 1: WO2008/075691 publication
However, in the triplexer 1000, signals of other frequency bands may be mixed through the capacitors constituting the first parallel resonant circuit X1, the second parallel resonant circuit X2, and the third parallel resonant circuit X3.
In general, since a signal of a high frequency is easily transmitted through the capacitor, for example, a signal of an intermediate frequency band or a signal of a high frequency band may be mixed into the signal path of a low frequency band via the capacitor of the first parallel resonant circuit X1. Further, a signal of a high frequency band may be mixed in the signal path of the intermediate frequency band via the capacitor of the second parallel resonant circuit X2.
Moreover, there are the following problems: mixing of signals of other frequency bands via the capacitors constituting the first parallel resonant circuit X1, the second parallel resonant circuit X2, and the third parallel resonant circuit X3 degrades the characteristics and reliability of the triplexer 1000.
Disclosure of Invention
The present invention has been made to solve the above-described conventional problems, and a laminated triplexer according to the present invention includes: a laminate in which a plurality of base material layers are laminated; a common terminal, a first branch terminal, a second branch terminal, and a third branch terminal formed on a surface of the laminate; and a first filter, a second filter, and a third filter formed inside the multilayer body, the first filter being connected to a path between the common terminal and the first branch terminal, the second filter being connected to a path between the common terminal and the second branch terminal, the third filter being connected to a path between the common terminal and the third branch terminal, and the first coil being connected between the common terminal and the first filter, a second coil connected between the common terminal and the second filter, a third coil connected between the common terminal and the third filter, the first coil, the second coil, and the third coil each having a coil conductor pattern formed between layers of the base material layer of the laminate, when the laminate is viewed from the laminating direction of the base material layers, the coil conductor pattern of the first coil, the coil conductor pattern of the second coil, and the coil conductor pattern of the third coil are arranged at positions that do not overlap each other.
Preferably, the first coil, the second coil, and the third coil each have a winding axis parallel to the lamination direction of the base material layers.
It is also preferable that the coil conductor pattern of at least one of the first coil, the second coil, and the third coil includes: first and second coil conductor patterns each formed in a U-shape, the first and second coil conductor patterns being formed between different layers of the base material layer, and the first coil conductor pattern having: a portion overlapping with the second coil conductor pattern in the width direction, and a portion not overlapping with the second coil conductor pattern in the width direction, the second coil conductor pattern having: a portion overlapping with the first coil conductor pattern in the width direction, and a portion not overlapping with the first coil conductor pattern in the width direction. In the case where the coil conductor patterns formed between different layers constituting the same coil overlap with each other, the occurrence of stray capacitance may be suppressed if the first coil conductor pattern and the second coil conductor pattern are arranged to be shifted in the width direction as described above. Further, it is possible to suppress mixing of signals of other frequency bands in a certain frequency band via such a stray capacitance.
Preferably, when the laminate is viewed from the laminating direction of the base material layers, the coil conductor pattern having the largest area of the region surrounded by the coil conductor patterns of the first coil, the second coil, and the third coil includes: and a third coil conductor pattern and a fourth coil conductor pattern each formed in a U-shape, the third coil conductor pattern and the fourth coil conductor pattern being formed on different layers of the base material layer, respectively, and the third coil conductor pattern and the fourth coil conductor pattern being overlapped in the width direction. As described above, the coil that requires the largest inductance value among the first, second, and third coils can obtain a larger inductance value by maximizing the area of the region surrounded by the coil conductor patterns and by overlapping the coil conductor patterns formed between different layers that form the same coil in the width direction.
The first filter, the second filter, and the third filter may be LC filters, respectively.
In the multilayer triplexer of the present invention, the first coil is connected to the front stage of the first filter, the second coil is connected to the front stage of the second filter, and the third coil is connected to the front stage of the third filter, and therefore, unlike the conventional parallel resonant circuit in which the coil and the capacitor are connected to the front stage, signals of other frequency bands are not mixed into a certain frequency band via the capacitor of the parallel resonant circuit.
In the laminated triplexer of the present invention, when the laminated body is seen through the lamination direction of the base material layers, the coil conductor pattern of the first coil, the coil conductor pattern of the second coil, and the coil conductor pattern of the third coil are arranged at positions that do not overlap each other, and therefore, the occurrence of stray capacitance between the coil conductor patterns of different coils is suppressed, and therefore, the mixing of signals of other frequency bands in a certain frequency band via such stray capacitance is suppressed.
Drawings
Fig. 1 is a perspective view of a laminated
Fig. 2 is an exploded perspective view showing a lower portion of the laminated
Fig. 3 is an exploded perspective view showing an intermediate portion of the laminated
Fig. 4 is an exploded perspective view showing an upper portion of the laminated
Fig. 5 is an equivalent circuit diagram of the laminated
Fig. 6 is a plan view of the laminated
Fig. 7 is a top perspective view of the laminated
Fig. 8 is a graph showing frequency characteristics of the laminated
Fig. 9 is a block diagram showing the triplexer 1000 disclosed in patent document 1.
Detailed Description
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
The embodiments of the present invention are described as examples, and the present invention is not limited to the embodiments. The drawings are provided to assist understanding of the specification, and may be drawn schematically, or the ratio of dimensions of drawn members or between members may not be equal to the ratio of the dimensions described in the specification. Note that, there are cases where members described in the specification are omitted from the drawings, where the members are drawn with the number omitted, and the like.
Fig. 1 to 4 show a laminated
In the present specification, when a member is given a reference numeral, letters a to z are used in order, but letters aa to az are used when the number of letters used is insufficient, and letters ba to bz are used when the number of letters used is insufficient. However, letters are not necessarily used in the order, and there is a case where a number is absent.
In addition, a relay electrode which does not need to be described in particular may not be denoted by a reference numeral and its description may be omitted.
The laminated
A
The ground electrode 5a and the relay electrodes 6a to 6d are formed on the upper main surface of the base material layer 1 b. In addition, the ground electrode may double as a capacitor electrode.
Capacitor electrodes 7a to 7e are formed on the upper principal surface of the base material layer 1 c. In addition, the capacitor electrode may also serve as a ground electrode.
Capacitor electrodes 7f to 7h are formed on the upper main surface of the base material layer 1 d.
Relay electrode 6e and capacitor electrodes 7i to 7k are formed on the upper main surface of substrate layer 1 e.
Capacitor electrodes 7l and 7m are formed on the upper main surface of the base material layer 1 f.
The capacitor electrode 7n is formed on the upper main surface of the base material layer 1 g.
Capacitor electrodes 7o and 7p are formed on the upper main surface of the base material layer 1 h. The capacitor electrode 7o and the capacitor electrode 7p are connected to each other.
Relay electrode 6f and capacitor electrodes 7q and 7r are formed on the upper principal surface of substrate layer 1 i.
A
The relay electrode 6g and the
The
Coil conductor patterns 8o to 8r are formed on the upper main surface of the
The relay electrode 6i and the
The relay electrode 6j and the coil conductor patterns 8aa to 8ad are formed on the upper main surface of the
Coil conductor patterns 8ae to 8ai are formed on the upper main surface of the
Capacitor electrodes 7aa and 7ab are formed on the upper main surface of the
Capacitor electrodes 7ac and 7ad are formed on the upper main surface of the
Capacitor electrodes 7ae and 7af are formed on the upper main surface of the
The capacitor electrode 7ag is formed on the upper main surface of the
Capacitor electrodes 7ah, 7ai are formed on the upper main surface of the
The upper main surface of the base material layer 1aa is provided with a
The substrate layers a to z are formed with via conductors penetrating between both principal surfaces as necessary. Next, each via conductor will be explained.
The
The
The ground terminal 4a is connected to the ground electrode 5a via the via conductor 9 e. The ground terminal 4b is connected to the ground electrode 5a via the via conductor 9 f. The ground terminal 4c is connected to the ground electrode 5a via the via conductor 9 g. The ground terminal 4d is connected to the ground electrode 5a via the via conductor 9 h.
The other end of the relay electrode 6c is connected to one end of the relay electrode 6e via the via conductor 9 i. The other end of the relay electrode 6a is connected to the capacitor electrode 7i and one end of the
The ground electrode 5a is connected to the capacitor electrode 7g via the via conductor 9 m. The ground electrode 5a is connected to one end of the coil conductor pattern 8ac through a via
The capacitor electrode 7b is connected to one end of the coil conductor pattern 8c via the via
The capacitor electrode 7f is connected to the capacitor electrode 7l, the other end of the
The capacitor electrode 7k is connected to one end of the relay electrode 6f via the via
The other end of the relay electrode 6e is connected to one end of the
The capacitor electrode 7n is connected to one end of the relay electrode 6g via the via
The connection point of the capacitor electrode 7o and the capacitor electrode 7p is connected to the connection point of the
The capacitor electrode 7r is connected to one end of the
The
The other end of the
The other end of the coil conductor pattern 8c is connected to one end of the
The other end of the
The other end of the
The other end of the coil conductor pattern 8o is connected to one end of the
The connection point between the other end of the
The other end of the coil conductor pattern 8aa is connected to one end of the coil conductor pattern 8ae via the via
The other end of the coil conductor pattern 8ae is connected to one end of the coil conductor pattern 8aj via the via
The other end of the relay electrode 6l is connected to the capacitor electrode 7aa via the via
The capacitor electrode 7ab is connected to the capacitor electrode 7af and the capacitor electrode 7ai via the via
The capacitor electrode 7ae is connected to the capacitor electrode 7ah via the via conductor 9bv.
The materials of the
The
The
The
The
The frequency of each band is arbitrary. In the present embodiment, the low frequency band is 617 to 960MHz, the middle frequency band is 1427 to 2690MHz, and the high frequency band is 3300 to 3800MHz, as an example.
The impedance adjustment coil L1 and the first LC filter 31 are connected to the low-band signal path 21. The coil L1 corresponds to the first coil described in the claims of the claims. The signal path 21 of the low frequency band reaches the
The first LC filter 31 has a coil L4 and a coil L5 connected in this order between the coil L1 and the
The impedance-adjusting coil L2 and the second LC filter 32 are connected to the intermediate-band signal path 22. Coil L2 corresponds to the second coil described in the claims. The signal path 22 of the intermediate band reaches the second branch terminal 3b.
The second LC filter 32 has a capacitor C6 and a coil L8 connected in this order between the coil L2 and the second branch terminal 3b. One end of a capacitor C5 is connected to one end of the capacitor C6, one end of a capacitor C7 is connected to the other end of the capacitor C6, and the other end of the capacitor C5 and the other end of the capacitor C7 are connected to each other. A coil L6 is connected between the ground and a connection point between the other end of the capacitor C5 and the other end of the capacitor C7. A coil L7 and a capacitor C8 are connected in this order between the connection point of the capacitor C6 and the coil L8 and the ground. Further, a capacitor C9 is connected between the ground and a connection point of the capacitor C6 and the coil L8. A capacitor C10 is connected in parallel with the coil L8.
The impedance adjusting coil L3 and the third LC filter 33 are connected to the high-frequency-band signal path 23. Coil L3 corresponds to a third coil described in the claims. The high-band signal path 21 reaches the
The third LC filter 33 has a capacitor C11, a capacitor C13, and a coil L11 connected in this order between the coil L3 and the third branch terminal 3C. A capacitor C12 and a coil L9 are connected in this order between the connection point of the capacitor C11 and the capacitor C13 and the ground. A capacitor C14 and a coil L10 are connected between the ground and the connection point of the capacitor C13 and the coil L11. Further, a capacitor C15 is connected between the ground and a connection point of the capacitor C13 and the coil L11. A capacitor C16 is connected in parallel with the coil L11.
Next, a relationship between the structure of the stacked
The
The low-band signal path 21 branches from the other end of the
The coil L1 for impedance adjustment is connected in order with the other end of the
The coil L4 of the first LC filter 31 is constituted by the following path: the via conductor 9ac, the relay electrode 6g, the via conductor 9ao, the coil conductor pattern 8aj, the via conductor 9bn, the coil conductor pattern 8ae, the via conductor 9bj, the coil conductor pattern 8aa, the via conductor 9as, the
The coil L5 of the first LC filter 31 is constituted by the
The capacitor C1 of the first LC filter 31 is mainly configured with the capacitor electrodes 7j and 7a as one electrode and the capacitor electrode 7h as the other electrode. The capacitor electrodes 7j and 7a are connected to a capacitor electrode 7n to which a coil L1 is connected via a via conductor 9 s. The capacitor electrode 7h is connected to the ground electrode 5a through a via conductor 9 o.
The capacitor C2 of the first LC filter 31 is mainly configured with the capacitor electrodes 7n and 7j as one electrode and the capacitor electrode 7m as the other electrode. As described above, the coil L1 is connected to the capacitor electrode 7 n. The capacitor electrode 7j is connected to the capacitor electrode 7n via a via conductor 9 s. The capacitor electrode 7m is connected to the other end of the coil L5, that is, the other end of the
The capacitor C3 of the first LC filter 31 is mainly configured with the capacitor electrode 7f as one electrode and the ground electrode 5a as the other electrode. The capacitor electrode 7f is connected to the other end of the
The capacitor C4 of the first LC filter 31 is mainly configured with the capacitor electrodes 7f and 7l as one electrode and the capacitor electrode 7i as the other electrode. The capacitor electrodes 7f and 7L are connected to the other end of the
The signal path 22 of the intermediate frequency band branches from the other end of the
The coil L2 for impedance adjustment is connected in order with the other end of the
The capacitor C5 of the second LC filter 32 is mainly configured with the
The capacitor C6 of the second LC filter 32 is mainly configured with the
The capacitor C7 of the second LC filter 32 is mainly configured with the
The coil L6 of the second LC filter 32 is composed of the following paths: the via conductor 9af, the
The
The coil L7 of the second LC filter 32 is composed of the following paths: the via conductor 9ah, the relay electrode 6i, the
The capacitor C8 of the second LC filter 32 is mainly configured with the capacitor electrode 7b as one electrode and the capacitor electrode 7g and the ground electrode 5a as the other electrode. As described above, the coil L7 is connected to the capacitor electrode 7 b. The capacitor electrode 7g is connected to the ground electrode 5a via conductor 9 m.
The capacitor C9 of the second LC filter 32 is mainly configured with the capacitor electrode 7C as one electrode and the ground electrode 5a as the other electrode. The capacitor electrode 7C is connected to a capacitor electrode 7p at a connection point between the capacitor C6 and the coil L8 via a via conductor 9 t.
The coil L8 of the second LC filter 32 is composed of the following paths: the via conductor 9ah, the relay electrode 6i, the via conductor 9be, the coil conductor pattern 8ak, the via conductor 9bo, the coil conductor pattern 8af, the via
The capacitor C10 of the second LC filter 32 is mainly configured with the capacitor electrode 7o as one electrode and the capacitor electrode 7q as the other electrode. The capacitor electrode 7o constitutes a connection point between the capacitor C6 and the coil L8. The capacitor electrode 7q is connected to the second branch terminal 3b via the via
The signal path 23 in the high frequency band is a branch point from the
The impedance adjusting coil L3 is formed by connecting a
Capacitor C11 of third LC filter 33 is mainly configured with capacitor electrode 7aa as one electrode and capacitor electrode 7ae as the other electrode. As described above, the coil L3 is connected to the capacitor electrode 7 aa.
The capacitor C13 of the third LC filter 33 is mainly configured with the capacitor electrodes 7ae and 7ah as one electrode and the capacitor electrode 7ag as the other electrode. As described above, the capacitor electrode 7ae is the other electrode of the capacitor C11. Further, the capacitor electrode 7ah is connected to the capacitor electrode 7ae through a via conductor 9bv.
The coil L11 of the third LC filter 33 is connected to the
Capacitor C12 of third LC filter 33 is mainly configured with capacitor electrode 7ae as one electrode and capacitor electrode 7ac as the other electrode. As described above, the capacitor electrode 7ae is the other electrode of the capacitor C11 and is one electrode of the capacitor C13, and forms a connection point between the capacitor C11 and the capacitor C13.
The coil L9 of the third LC filter 33 is constituted by the following path: via conductor 9al, relay electrode 6j, via conductor 9aw, coil conductor pattern 8l, via conductor 9ar,
The capacitor C14 of the third LC filter 33 is mainly configured with the capacitor electrodes 7ad, 7ag as one electrode and the capacitor electrodes 7ai, 7af, 7ab as the other electrode. As described above, the capacitor electrode 7ag is the other electrode of the capacitor C13. The capacitor electrode 7ad is connected to the capacitor electrode 7ag through a via
The coil L10 of the third LC filter 33 is constituted by the following path: the via conductor 9bt, the coil conductor pattern 8an, the via conductor 9br, the coil conductor pattern 8ai, the via conductor 9bm, the coil conductor pattern 8ad, and the via
The capacitor C15 of the third LC filter 33 is configured with the capacitor electrode 7d as one electrode and the ground electrode 5a as the other electrode. The capacitor electrode 7d is connected to the capacitor electrode 7ag, which is the other electrode of the capacitor C13, via the via conductor 9v, the capacitor electrode 7k, the via conductor 9aa, the relay electrode 6f, and the via conductor 9 v.
The capacitor C16 of the third LC filter 33 is configured with the capacitor electrode 7k as one electrode and the capacitor electrode 7e as the other electrode. The capacitor electrode 7k is connected to a capacitor electrode 7ag, which is the other electrode of the capacitor C13, via a via conductor 9aa, the relay electrode 6f, and a via conductor 9 v. The capacitor electrode 7e is connected to the
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