TWI619130B - Rf coil with imbalanced magnetic-cancelling mechanism and device for magnetic-cancelling - Google Patents

Abstract

The present invention provides a radio frequency coil having an unbalanced magnetic field canceling structure and a related device. The radio frequency coil includes a first radio frequency chirp, a second radio frequency chirp, and a first radio frequency chirp coupled to the first radio frequency chirp and the second radio frequency chirp Multiple local wiring. The plurality of partial wires include: a first group of partial wires coupled to the first RF port; a second group of partial wires coupled to the second RF port; and a third group of partial wires coupled to the first group of portions Between the wiring and the second set of partial wiring. A second region formed by the first set of partial wirings and the second set of partial wirings is different from the first region formed by the third set of partial wirings to provide the unbalanced magnetic field offset to the RF coil Architecture.

Description

RF coil with unbalanced magnetic field cancellation architecture and device for magnetic field cancellation

The present invention relates to improvements in integrated circuits (ICs), a radio frequency coil having an unbalanced magnetic-cancelling (IMC) architecture, and related devices.

The present invention claims priority to U.S. Provisional Application No. 62/430,876, filed on December 6, 2016, the entire contents of which are incorporated herein by reference.

In order to reduce mutual electromagnetic interference between components caused by coils or inductors, especially wafer type radio frequency coils, the prior art proposes some solutions, but some problems such as side effects also occur. For example, these solutions typically require the center of symmetry of the inductor to be aligned to provide a magnetic field offset that produces an anti-jamming effect. In addition, the prior art also proposes some RF coil designs to attempt to reduce the above mutual electromagnetic interference effects. However, when someone implements an electronic product based on one or more RF coil designs in these RF coil designs, the electronic product may have some side effects, such as the inability to optimize by aligning the symmetrical centerline of the inductor. Circuit layout plan (floor-plan). Some of the intrinsic defects inherent in the architecture caused by the traditional anti-jamming RF coil design. Therefore, there is a need for a novel structure to solve the problems faced by the prior art as appropriate, without side effects or with fewer side effects.

It is an object of the present invention to provide a radio frequency coil and an associated device having an unbalanced magnetic-cancelling (IMC) architecture to solve the above-mentioned problems faced by the prior art.

Another object of the present invention is to provide a radio frequency coil and an associated device having an unbalanced magnetic field cancellation structure to enhance the performance of the integrated circuit.

At least one embodiment of the present invention provides a radio frequency coil having an unbalanced magnetic-cancelling (IMC) architecture, wherein the radio frequency coil is applied to an electronic device. The RF coil includes a first RF port, a second RF port, and a plurality of partial wires. The first RF system is configured to couple the RF coil to an RF port of a circuit of the electronic device, and the second RF channel is configured to couple the RF coil to another RF of the circuit of the electronic device. The plurality of local wires are coupled between the first RF port and the second RF port. The plurality of partial wires includes: a first group of partial wires, wherein the first group of partial wires are coupled to the first RF port of the RF coil; and a second group of partial wires, wherein the second group of partial wires are a second RF port coupled to the RF coil; and a third set of local wires, wherein the third group of local wires are coupled between the first group of local wires and the second group of portion wires. In addition, a second region formed by the first group of partial wires and the second group of partial wires is different from a first region formed by the third group of partial wires to provide the imbalance to the RF coil. Magnetic field offset architecture.

At least one embodiment of the present invention provides an apparatus for performing magnetic field cancellation, wherein the apparatus is applied to an electronic device. The device includes a radio frequency coil having an unbalanced magnetic field canceling structure, the radio frequency coil including a first radio frequency chirp, a second radio frequency chirp, and a plurality of local wiring. The first RF system is configured to couple the RF coil to an RF port of a circuit of the electronic device, and the second RF channel is configured to couple the RF coil to another circuit of the circuit of the electronic device And the plurality of local wires are coupled between the first RF port and the second RF port, wherein the plurality of local wires comprise: a first group of partial wires in series, wherein the first group of portions The wiring is coupled to the first RF 埠 of the RF coil; a second set of partial wirings connected in series, wherein the second set of partial wiring is coupled to the second RF 埠 of the RF coil; and a serial connection The three sets of partial wirings are coupled between the first set of partial wirings and the second set of partial wirings. In addition, a second region formed by the first group of partial wires and the second group of partial wires is different from a first region formed by the third group of partial wires to provide the imbalance to the RF coil. Magnetic field offset architecture.

The radio frequency coil of the present invention and related devices can solve the problems faced by the prior art without side effects or fewer side effects. When someone implements an electronic product according to the radio frequency coil of the present invention and related devices, he/she will not suffer from the above problems faced by the prior art. For example, the radio frequency coil of the present invention can be configured to reduce or eliminate electromagnetic interference (eg, unwanted magnetic field line interference) caused by a nearby RF coil, such as a coil located near the radio frequency coil, regardless of this Where the coil is located, and whether or not this coil is located on any one of the axes of the RF coil (eg, any one of its axes of symmetry or any one of its reference axes). In some examples, the adjacent coils described above are in close proximity to the radio frequency coil of the present invention.

1 is a schematic diagram of a radio frequency coil 100 having an unbalanced magnetic-cancelling (IMC) architecture in accordance with an embodiment of the present invention. The radio frequency coil 100 is applied to an electronic device. For example, the radio frequency coil 100 can be applied to an integrated circuit (IC) in the electronic device, and the radio frequency coil 100 can be implemented as one of a plurality of components in the integrated circuit. The RF coil 100 can be used to reduce electromagnetic interference (e.g., unwanted electromagnetic interference) caused by a nearby coil, such as a coil located near the RF coil 100. According to some embodiments, the adjacent coils may be in close proximity to the radio frequency coil of the present invention (eg, radio frequency coil 100). Examples of the integrated circuit may include, but are not limited to, a Bluetooth transceiver front-ends (transceiver front-ends), a wireless network (Wi-Fi, such as IEEE 802.11 a/b/g/n/ac, etc.) a transceiver front-end circuit, a cellular transceiver front-end circuit, a digital video broadcasting (DVB) transceiver front-end circuit, a digital audio broadcasting (DAB) transceiver front-end circuit, and any other type of Radio frequency IC (RFIC) transceiver front-end circuit.

As shown in FIG. 1 , the RF coil 100 can include a plurality of RF ports, such as a first RF port A and a second RF port B, and can be coupled between the first RF port A and the second RF port B. a plurality of local wirings, such as at least one electrical conductor (eg, one or more electrical conductors) having one or more conductive paths between the first RF 埠A and the second RF 埠B of the RF coil 100 The local structure of the wiring. The first RF port A can be used to couple the RF coil 100 to a RF port of a circuit of the electronic device (for example, the integrated circuit), and the second RF port B can be used to couple the RF coil 100 to the electronic device. Another RF 埠 of this circuit. As such, the circuit can utilize the RF coil 100 as one of many components of the circuit. In addition, the plurality of partial wires may include a first group of local wires 110 (which may be a group of local wires in series), a second group of local wires 120 (which may be a group of partial wires in series), and a first Three sets of local wirings 130 (which may be a set of local wiring in series). The first set of partial wires 110 may be coupled to the first RF port A of the RF coil 100, and the second set of partial wires 120 may be coupled to the second RF port B of the RF coil 100. The third set of partial wirings 130 may be coupled between the first set of partial wirings 110 and the second set of partial wirings 120. In addition, the plurality of partial wires (for example, the at least one electrical conductor described above) may be arranged to have two loop shapes, such as "loop 1" and "back" respectively in FIG. Two loops of the circle 2" and surrounded by a second region surrounded by the first group of partial wires 110 and the second group of partial wires 120 (for example, a circle labeled "Circle 2" in Fig. 1) The area is different from a first area surrounded by the third set of local wirings 130 (for example, the area surrounded by the loop labeled "Circle 1" in FIG. 1) to provide the RF coil 100 with the Balance the magnetic field offset architecture.

According to this embodiment, an end point of the first group of local wires 110 (eg, a lower end thereof) is coupled to the first RF port A of the RF coil 100, and an end point of the second group of local wires 120 (eg, a lower end thereof) The second RF port B is coupled to the RF coil 100. The third set of partial wires 130 are coupled between the other end of the first set of local wires 110 (eg, the upper end thereof) and the other end of the second set of local wires 120 (eg, the upper end thereof). Note that some local wiring near the cross point Crossing(1) can be drawn with dashed lines to more clearly indicate a particular local path corresponding to the local wiring, and corresponding to the local wiring. Some other partial routing of some other local wiring to avoid confusion. At the intersection Crossing (1), the specific partial path and the other partial path are not electrically connected to each other. For example, a current path in the RF coil 100 can originate from the first RF 埠A, pass through the first set of local wirings 110, and reach the right half of the third set of local wirings 130 at the intersection Crossing(1). a second group of local wirings 130 (in a counterclockwise direction), and a second set of local wirings 120 at the intersection Crossing (1), and passing (passing) the second group of local wirings 120 and arriving The second RF 埠B.

The architecture as shown in Figure 1 can be viewed as a radio frequency coil architecture with two different sized loops and one intersection (e.g., intersection Crossing (1)). In the case of the loop labeled "Circle 2" in Fig. 1, although the first group of local wirings 110 and the second group of local wirings 120 have no direct electrical connection at the intersection Crossing (1), 1 is a view from the orthogonal direction of FIG. 1 (for example, a direction parallel to the Z axis, in which the first image is in the XY plane, the horizontal axis can be the X axis, and the vertical axis can be the Y axis). The loop (ie, loop 2) looks like a loop, so it can be called a "loop" if the intersection Crossing(1) is temporarily ignored. According to some embodiments, the radio frequency coil (e.g., radio frequency coil 100, etc.) of the present invention may be implemented on the circuit (e.g., the integrated circuit), wherein a substrate for implementing the integrated circuit may be Located on the XY plane, and the orthogonal direction of the substrate can be parallel to the Z axis. For example, when viewed from the orthogonal direction of the substrate, one or more sets of local wiring having breaks and/or intersections may appear to be a loop, and thus temporarily disregard the break and/or intersection. The one or more sets of local wiring may be referred to as loops in the presence or absence of a condition. In some embodiments, one or more sets of local wiring may be similar to the wiring pattern labeled "Circle 2" in Figure 1, and may also be referred to as a loop.

According to some embodiments, the second region (for example, the region surrounded by the partial structure of the plurality of segments in FIG. 1 and surrounded by the loop labeled "loop 2") is different from the first region ( For example, in FIG. 1 , a region surrounded by a plurality of partial structures and surrounded by a loop labeled "loop 1", the radio frequency coil 100 can be magnetically canceled in an unbalanced manner. To minimize unwanted electromagnetic interference, and to apply to an aggressor coil (such as the adjacent coils described above) in various positions relative to the radio frequency coil. For example, regardless of where the aggressor coil is located, and regardless of whether the aggressor coil is located on any one of the RF coils 100 (eg, any one of its axes of symmetry or any of its reference axes), the RF coil 100 is available. A balanced approach to magnetic field cancellation to minimize unwanted electromagnetic interference.

2 is a schematic diagram of a radio frequency coil 200 having an unbalanced magnetic field canceling structure according to another embodiment of the present invention. For better understanding, two closed loop versions of the radio frequency coil 100 are illustrated in this embodiment. (closed loop version) 100-1 and 100-2 are exemplified, wherein each of the closed loop versions 100-1 and 100-2 can be regarded as a turn coil, and some break points; Or referred to as a breakpoint) such as fractures BP(0), BP(1), BP(2), etc. can be used to indicate that the loop/coil can be broken or segmented at those locations. As shown in FIG. 2, the RF coil 200 can be implemented by combining two closed loop versions 100-1 and 100-2 of the RF coil 100. It is assumed that the closed loop version 100-1 of the RF coil 100 can be split into two parts at the two breaks BP(0) and BP(1), such as an S-shape portion and an inverse S-shape. The (inverse-S shape) portion, and the closed loop version 100-2 of the radio frequency coil 100 can be disconnected at the break BP(2). The RF coil 200 is equivalent to: the inverse S-shaped portion of the closed loop version 100-1, the closed loop version 100-2 that is broken at the fracture BP(2), and the S of the closed loop version 100-1. A combination of shaped parts. For example, a current path in the RF coil 200 can originate from the first RF 埠A and pass (pass) through the inverse S-shaped portion of the RF coil 200 (eg, starting from the inverse S-shaped portion) Located at the lower end of the fracture BP(0) and reaching the upper end of the inverse S-shaped portion at the fracture BP(1), and can be disconnected (by) at the fracture BP(2) and integrated Closed loop version 100-2 in the RF coil 200 (eg, starting from the left end of the break BP(2) and reaching the other end on the right side of the break BP(2)), and passing (passing) integration The sigmoid portion of the RF coil 200 (eg, the bit starting from the S-shaped portion is at the upper end of the fracture BP(1) and reaches the lower end of the S-shaped portion at the lower end of the fracture BP(0)), and finally Arrived at the second RF 埠B. The position of the fracture is not limited to BP0, BP(1) and BP(2), and the disconnection at any position on the closed loop can also be defined as RF port. The fractures BP0, BP(1) and BP(2) listed here are only three possible embodiments and are not considered exhaustive.

The architecture shown in Figure 2 can be viewed as a radio-frequency coil architecture with even-turn coils, with even-numbered turns, and since each of the even-numbered turns corresponds to the unbalanced magnetic field of the RF coil 100 The pin architecture, the unbalanced magnetic field cancellation architecture of the RF coil 200 can be viewed as an even-turn IMC (ETIMC) architecture. In addition, when the RF coil 100 having the unbalanced magnetic field canceling structure can be regarded as an unbalanced magnetic field offsetting the RF coil, the RF coil 200 having the unbalanced magnetic field canceling structure can be regarded as an even-numbered unbalanced magnetic field offsetting RF Coil. Please note that the radio frequency coil 200 can also be applied to an electronic device such as the one described above. For example, the radio frequency coil 200 can be applied to an integrated circuit of the electronic device, and the radio frequency coil 200 can be implemented as one of a plurality of components in the integrated circuit. Through the even-numbered unbalanced magnetic field cancellation architecture described above, the RF coil 200 can substantially reduce or offset unwanted electromagnetic interference caused by an adjacent coil such as the one described above.

3 is a schematic diagram of an off-axis unbalanced magnetic field canceling scheme for a radio frequency coil 100V having an unbalanced magnetic field canceling structure according to an embodiment of the present invention, wherein the radio frequency coil 100V shown in FIG. It can be taken as an example of the radio frequency coil 100 shown in Fig. 1. A shaft 301 (shown in phantom) of the RF coil 100V passes through a cross point of the RF coil 100V. For example, the shaft 301 can be parallel to a horizontal axis such as the X axis. In the present embodiment, the area enclosed by the second area (for example, the area surrounded by the loop labeled "Circle 2" in Fig. 1), such as the area surrounded by the partial wiring below the shaft 301, is still different from the An area (such as the area enclosed by the loop labeled "Circle 1" in Fig. 1) such as the area enclosed by the partial wiring above the shaft 301. In the present embodiment, the vibrator coil such as the aggressor coil Aggressor (1) shown in Fig. 3 may appear in the vicinity of the radio frequency coil 100V. When the aggressor coil Aggressor (1) (precisely, the center of the aggressor coil Aggressor (1)) is not located at the axis of the RF coil 100V (such as the axis 301 shown in Figure 3 or the axis shown in Figure 4 below) 302) The unbalanced magnetic field cancellation architecture of the RF coil 100V can function specifically. The induced current induced by the aggressor coil Aggressor (1) (eg, the induced current indicated by the arrow drawn along the current path of the RF coil 100V in FIG. 3) may correspond to the first region and the second, respectively The magnetic field of the area. Since the position of the aggressor coil Aggressor (1) relative to the radio frequency coil 100V can be known in advance (for example, determined in advance in the design phase of the electronic device), the area of the first region and the second region can be determined in advance (for example, in advance It is determined by the design phase of the electronic device) to minimize the interference effects that may be caused by the Aggressor coil (1). For example, the distance between the aggressor coil Aggressor (1) and the center of the second region (such as the area surrounded by the local wiring below the shaft 301) is greater than the aggressor coil Aggressor (1) and the first The distance between the centers of the regions (such as the regions surrounded by the local wiring above the shaft 301), so the magnetic field strength caused by the aggressor coil Aggressor(1) among the first regions is infringed by the second region The magnetic field strength caused by the coil Aggressor (1) is stronger (for example, in Figure 3, the density of the symbol "⊗" above the axis 301 is greater than the density of the symbol "⊗" below the axis 301 to indicate the The magnetic flux density of a region is greater than the magnetic flux density of the second region. In the above design stage, the first and second regions may be appropriately designed to be different from the aggressor coil Aggressor (1). An area and an area of the second area, so in the embodiment, the area of the second area is larger than the area of the first area; for example, the total induced current corresponding to the second area The total induced current on the local wiring, such as below the shaft 301, may be equivalent to the total induced current corresponding to the first region (such as the total induced current on the local wiring above the shaft 301), and thus the two can cancel each other out. In some examples, the area sizes of the first and second regions may be roughly determined (or estimated) such that the total induced current corresponding to the second region is substantially equal to the total induced current corresponding to the first region, and thus Both can be roughly offset each other.

4 is a schematic diagram of an on-axis unbalanced magnetic field canceling scheme for the radio frequency coil 100V shown in FIG. 3 according to an embodiment of the present invention. The axis 302 of the RF coil 100V passes through the intersection of the RF coil 100V. For example, the axis 302 can be parallel to a vertical axis such as the Y axis, wherein the axis 302 of the present embodiment can be considered as an axis of symmetry of the RF coil 100V (eg, the paths of the RF coil 100V on both sides of the axis 302 are symmetrical to each other) . Note that when the aggressor coil such as the aggressor coil Aggressor (1) shown in Fig. 4 (precisely, the center of the aggressor coil Aggressor (1)) is located on the shaft 302, the RF coil 100V is unbalanced. The magnetic field cancellation architecture can also play a specific role. Similarly, in the above design stage, the area of the first area and the second area can be properly designed by considering the difference in distance between the first and second regions relative to the aggressor coil Aggressor (1), and thus in this embodiment, The area of the second area is larger than the area of the first area; for example, the total induced current corresponding to the second area may be equivalent to the total induced current corresponding to the first area, and thus the two can cancel each other out. In some examples, the area sizes of the first region and the second region may be roughly determined (or estimated) such that the total induced current corresponding to the second region may be almost identical to the total induced current corresponding to the first region. And thus can be substantially offset from each other.

Regarding the shaft unbalanced magnetic field canceling scheme and the off-axis unbalanced magnetic field canceling scheme, the implementation manner of determining the area size of the first region and the second region can be changed. In some embodiments, one or more simulations may be performed based on an unbalanced RF coil model of the RF coil 100V and an aggressor coil model of the aggressor coil Aggressor (1), The area size of the first area and the second area is determined. In some embodiments, the area of the first region and the second region may be determined by trial and error.

5 is a schematic diagram of an even-number unbalanced magnetic field offset (ETIMC) scheme for a radio frequency coil 200V having an unbalanced magnetic field canceling structure according to an embodiment of the present invention, wherein the radio frequency coil 200V shown in FIG. 5 can be used as An example of the radio frequency coil 200 shown in FIG. Two axes of the RF coil 200V, such as the shaft 401 and another axis that is perpendicular to each other (e.g., the axis 402 in subsequent embodiments), pass through the center of the RF coil 200V (e.g., the center of symmetry of the RF coil 200V; Where it is slightly asymmetrical, such as where RF 埠A and B are located). For example, one of the two axes of the RF coil 200V, such as the axis 401, can be parallel to a horizontal axis, such as the X-axis, while the other of the two axes of the RF coil 200V, such as the axis 402, can be parallel to a vertical axis, such as the Y-axis. In the case of ignoring some slight differences in the implementation details of the circuit layout (eg, small gaps between the RF 埠A and B and/or some offset of one or more local wiring), the axis in this embodiment Any of 401 and 402 can be considered as the axis of symmetry of the RF coil 200V. Note that when the aggressor coil Aggressor (1) (precisely, its center point) is seated on the shaft 401, the unbalanced magnetic field cancellation architecture of the RF coil 200V can specifically function. For the sake of brevity, the contents of this embodiment that are similar to the foregoing embodiments are not described herein again.

According to some embodiments, the radio frequency coil is constructed ignoring some slight differences in implementation details regarding the circuit layout (eg, small gaps between the RF ports A and B and/or some offset of one or more local wires). One of the two coils of 200 (eg, RF coil 200V), such as a second coil corresponding to closed loop version 100-2, can be considered as the other of the two coils (such as corresponding to A duplicate version of a first loop coil that encloses loop version 100-1.

Some subsequent embodiments illustrate some implementation details of the mask design for the even-numbered loop unbalanced magnetic field offsetting the RF coil, such as some of the layout details of the RF coil 200. For example, a first unbalanced magnetic field offset RF coil mask design described in the embodiments shown in FIGS. 6 and 7 to 9 can be regarded as a layout type I (Layout Style I), and A second unbalanced magnetic field offset RF coil mask design as described in the embodiments shown in Figures 10 through 12 can be considered as Layout Style II.

6 is a schematic diagram showing an electromagnetic (EM) simulation setting of a radio frequency coil 500 having an unbalanced magnetic field canceling structure according to an embodiment of the present invention, wherein the radio frequency coil 500 shown in FIG. 6 can be used as the second drawing. An example of a radio frequency coil 200 is shown. Since the RF coil 500 in this embodiment is an unbalanced magnetic field canceling structure, similarly, when the aggressor coil Aggressor (2) located on the shaft 401 (or the X-axis) is close to the center of the RF The coil 500 will begin to operate. For example, the aggressor coil Aggressor (2) can be in close proximity to the RF coil 500. For the sake of brevity, the contents of this embodiment that are similar to the foregoing embodiments are not described herein again.

7 is a schematic diagram of a first layer 510 of the first even-numbered unbalanced magnetic field offset RF coil mask design according to an embodiment of the present invention, and FIG. 8 is the first embodiment of the embodiment shown in FIG. An even-numbered unbalanced magnetic field cancels a schematic diagram of a second layer 520 of the RF coil mask design, and the first even-numbered unbalanced magnetic field offsets the RF coil mask in the embodiment shown in FIG. A schematic diagram of a third layer 530 of the design. Each of the first layer 510, the second layer 520, and the third layer 530 can be implemented using at least one electrically conductive material (eg, metal, or any other type of electrically conductive material) to provide a conductive path, and the three layers ( A partial structure or sub-structure of the wiring of the first layer 510, the second layer 520, and the third layer 530) (eg, segments of the three-layer wiring/sub-wiring) As an example of the plurality of partial wirings coupled between the first RF 埠A and the second RF 埠B. In addition, the third layer 530 can be implemented as the bottom layer of the three layers, the second layer 520 can be implemented on the third layer 530, and the first layer 510 can be implemented on the second layer 520. . Since the first layer 510 and the second layer 520 are in close proximity to each other, and the second layer 520 and the third layer 530 are in close proximity to each other, at least two of the three layers (for example, two or three layers) are electrically conductive (such as The metal or the like may be bonded together in one or more overlapping regions (for example, regions in which the conductive materials overlap in at least two of the above layers, such as regions in which the conductive material exists simultaneously in the at least two layers). For the sake of brevity, the contents of this embodiment that are similar to the foregoing embodiments are not described herein again.

According to some embodiments, the order of the three layers may be reversed (eg, the second layer 520 may be disposed over the first layer 510 and the third layer 530 may be disposed over the second layer 520). According to some embodiments, the second layer 520 may be implemented using vias such as through-silicon vias (TSVs). For example, the through holes may be distributed in a conductive material region (for example, a metal region) in the second layer 520 shown in FIG.

10 is a schematic diagram of a first layer 610 of the second even-numbered unbalanced magnetic field offset RF coil reticle design according to another embodiment of the present invention, and FIG. 11 is the embodiment in the embodiment shown in FIG. The second even-numbered unbalanced magnetic field cancels a schematic diagram of a second layer 620 of the RF coil mask design, and the second even-numbered unbalanced magnetic field offsets the RF coil light in the embodiment shown in FIG. A schematic view of a third layer 630 of the cover design. Each of the first layer 610, the second layer 620, and the third layer 630 can be implemented with at least one electrically conductive material (eg, metal or any other type of electrically conductive material) to provide a conductive path, and the three layers (first The partial structure or substructure of the wiring of the layer 610, the second layer 620, and the third layer 630) (eg, the segments of the three layers of the wiring/sub-wiring) may be coupled to the first RF 埠A and the second RF as the foregoing An example of the plurality of partial wirings between 埠B. In addition, the third layer 630 can be implemented as the bottom layer of the three layers, the second layer 620 can be implemented on the third layer 630, and the first layer 610 can be implemented on the second layer 620. . Since the first layer 610 and the second layer 620 are in close proximity to each other, and the second layer 620 and the third layer 630 are in close proximity to each other, at least two of the three layers (for example, two or three layers) are electrically conductive (such as The metal or the like may be bonded together in one or more overlapping regions (for example, regions in which the conductive materials overlap in at least two of the above layers, such as regions in which the conductive material exists simultaneously in the at least two layers). For the sake of brevity, the contents of this embodiment that are similar to the foregoing embodiments are not described herein again.

According to some embodiments, the order of the three layers may be reversed (eg, the second layer 620 may be disposed over the first layer 610, and the third layer 630 may be disposed over the second layer 620).

Figure 13 is a schematic illustration of a radio frequency coil 400 having an unbalanced magnetic field cancellation architecture in accordance with another embodiment of the present invention. For a better understanding, two closed loop versions 200-1 and 200-2 of the radio frequency coil 200 are illustrated in the present embodiment, wherein the closed loop versions 200-1, 200-2 Each can be viewed as a two-turn coil, and some breaks (or breakpoints) such as breaks BP(10), BP(11), BP(12), etc. can be used to indicate that the loop/coil can be Disconnected or segmented in those places. As shown in FIG. 13, the RF coil 400 can be implemented by combining two closed loop versions 200-1 and 200-2 of the RF coil 200. It is assumed that the closed loop version 200-1 of the RF coil 200 can be broken at two breaks BP(10) and BP(11) and divided into two parts, such as containing most of the local wiring/substructures in its local wiring. a main part (for example, all local wiring except the inverse-C shape part between the break BP(10) and BP(11) in the closed loop version 200-1), and the remaining part thereof A primary portion of the wiring (e.g., an inverse C-shaped portion between the breaks BP(10) and BP(11) described above); and a closed loop version 200-2 of the RF coil 200 can be broken at the break BP (12). The RF coil 400 is equivalent to: the main portion of the closed loop version 200-1, the closed loop version 200-2 that was broken at the fracture BP (12), and the closed loop version 200-1. Partial combination. For example, a current path in the RF coil 400 can be initiated from the first RF 埠A and passed (passed) through the main portion that has been integrated into the RF coil 400 (eg, at the fracture originating from the main portion) The lower end of BP (10) and arriving at the other end of the main portion at the break BP (11), can be passed (through) the break at the break BP (12) and closed in the RF coil 400 Loop version 200-2 (eg, starting from one end of one side of the break BP (12) and reaching the other end of the other side of the break BP (12)), and passing (passing) integrated into the RF coil The secondary portion of 400 (eg, from the upper end of the fracture C (11) from the inverse C-shaped portion and to the lower end of the fracture BP (10) reaching the reverse C-shaped portion), finally reaching the second RF 埠B.

The architecture shown in Figure 13 can be viewed as a radio frequency coil architecture with even-numbered coils, wherein the unbalanced magnetic field cancellation architecture of the RF coil 400 can be classified as an even-number unbalanced magnetic field offset (ETIMC) architecture, and having the above The RF coil 400 of the unbalanced magnetic field cancellation architecture can be viewed as an even-loop unbalanced magnetic field offsetting the RF coil. Please note that the radio frequency coil 400 can also be applied to an electronic device such as the one described above. For example, the radio frequency coil 400 can be applied to an integrated circuit of the electronic device, and the radio frequency coil 400 can be implemented as one of a plurality of elements in the integrated circuit. Through the even-numbered unbalanced magnetic field cancellation architecture described above, the RF coil 400 can substantially reduce or offset unwanted electromagnetic interference caused by an adjacent coil such as the one described above.

According to some embodiments, the unbalanced magnetic field cancellation architecture of the radio frequency coil 400 may be referred to as the even-numbered unbalanced magnetic field cancellation architecture. In some embodiments, the unbalanced magnetic field cancellation architecture of the radio frequency coil 400 may be referred to as a four-leaf clover type or a lucky-clover type even-numbered unbalanced magnetic field cancellation architecture (eg, the RF coil in FIG. 13) The shape of the 400 looks like a lucky grass with four leaves).

According to some embodiments, the radio frequency coil 200 can include a first turn of wirings (eg, closed loop version 100-1) and a second loop of wiring (eg, closed loop version 100-2). The first turn wiring may include a first set of partial wirings 110, a second set of partial wirings 120, and a third set of partial wirings 130. In addition, the second loop wiring may include a plurality of sets of partial wirings for respectively emulating the first group of partial wirings 110, the second group of partial wirings 120, and the third group of partial wirings 130 in the first loop wiring. For example, the first loop wiring can be divided into two sub-turn wirings at one of its fractures (eg, the break BP(1) of the closed loop version 100-1) (eg, closed loop version 100- The inverse S-shaped portion of 1 and the S-shaped portion). The second loop wiring (eg, closed loop version 100-2) may be inserted into one end of a sub-ring wiring of the two sub-ring wirings on one side of the fracture of the first loop wiring (eg, the An upper end of the inverse S-shaped portion) and an end point of the other sub-ring wiring of the two sub-ring wirings on the other side of the fracture of the first-circle wiring (eg, an upper end point of the S-shaped portion) between. In addition, the combination of the first loop wiring and the second loop wiring can provide a current path starting from the first RF 埠A, passing (passing) the sub-ring wiring in the two sub-ring wirings ( For example, the inverse S-shaped portion integrated in the RF coil 200), the second loop wiring (for example, the closed loop version 100-2 in which the fracture BP (2) is disconnected and integrated in the RF coil 200), And the other sub-ring wiring of the two sub-ring wirings (eg, the s-shaped portion integrated in the radio frequency coil 200), and reaching the second radio frequency 埠B.

According to some embodiments, the radio frequency coil 400 can include a first group of wirings (eg, closed loop version 200-1) and a second group of wiring (eg, closed loop version 200-2). The first group wiring may include the first loop wiring (eg, closed loop version 100-1) and the second loop wiring (eg, closed loop version 100-2), and the second group wiring may include multiple The loop wiring is used to simulate the first loop wiring and the second loop wiring, respectively. For example, the first group of wires can be divided into two sub-groups at one of its fractures (eg, the break BP (11) of the closed loop version 200-1) (eg, closed loop version 200) The above main part of -1 and the above-mentioned minor part). The second group of wires (eg, closed loop version 200-2) can be inserted into an end of a subset of the two subgroups located on one side of the break of the first group of wires ( For example, an upper end point of the main portion) and an end point of another subgroup of the two subgroups on the other side of the fracture of the first group wiring (eg, an upper end point of the secondary portion) between. In addition, the combination of the first group wiring and the second group wiring can provide a current path starting from the first RF 埠A, passing (passing) the subgroup in the two subgroups Groups (eg, the above-described main portions integrated in the RF coil 400), the second group wiring (eg, closed loop version 200-2 that is disconnected at the break BP (12) and integrated into the RF coil 400) And the other of the two subgroups (eg, the secondary portion integrated in the RF coil 400) and arrive at the second RF port B.

The radio frequency coils of the present invention (e.g., radio frequency coil 100, radio frequency coil 200, radio frequency coil 400, etc.) can be configured to reduce or offset electromagnetic interference caused by adjacent coils. For example, the radio frequency coil of the present invention can be configured to reduce or offset electromagnetic interference generated by adjacent coils, regardless of where the adjacent coil is located (eg, at a location relative to the radio frequency coil). According to the embodiment shown in Fig. 3, the adjacent coil, such as the aggressor coil Aggressor (1), is not located on a first axis (e.g., shaft 301) of the radio frequency coil 100 (such as the radio frequency coil 100V). Further, the first group of partial wires 110 and the second group of partial wires 120 are located on one side of the first axis (for example, the lower side of the shaft 301 shown in FIG. 3), and the third group of partial wires 130 are located at the first portion The other side of one axis (for example, the upper side of the shaft 301 shown in Fig. 3). Additionally, the first axis (e.g., axis 301) is perpendicular to a second axis (e.g., axis 302) of radio frequency coil 100 (such as radio frequency coil 100V). A portion of the first set of local wirings 110 and the third set of partial wirings 130 is located on one side of the second axis (eg, the left side of the axis 302), and the other of the second set of partial wires 120 and the third set of partial wires 130 A portion is located on the other side of the second axis (eg, the right side of the shaft 302). According to the embodiment illustrated in Fig. 4, the adjacent coil, such as the aggressor coil Aggressor (1), is located on an axis (e.g., shaft 302) of the radio frequency coil 100 (such as the radio frequency coil 100V). A portion of the first set of local interconnects 110 and a third set of partial interconnects 130 are located on one side of the shaft (eg, to the left of the shaft 302), and another portion of the second set of partial interconnects 120 and the third set of partial interconnects 130 are located The other side of the shaft (for example, the right side of the shaft 302). According to the embodiment shown in Fig. 5, the adjacent coil, such as the aggressor coil Aggressor (1), is located on a shaft (e.g., shaft 401) of the radio frequency coil 200 (such as the radio frequency coil 200V), and the shaft passes through the radio frequency coil. Central (for example, its center of symmetry). For example, the RF coil 200 (such as the RF coil 200V) may include a plurality of sets of local wirings for respectively simulating the first set of partial wirings 110, the second set of partial wirings 120, and the third set of partial wirings in the first winding. 130. A combination of a first set of local interconnects 110, a second set of local interconnects 120, and a third set of local interconnects 130 (eg, closed loop version 100-1 integrated in radio frequency coil 200) and a combination of the plurality of sets of localized wiring (eg, integration) The closed loop version 100-2 in the RF coil 200 is centered at the center of the RF coil and has opposite alignment directions, respectively. The arrangement direction of the combination of the plurality of sets of local wirings is different from the arrangement direction of the combination of the first group of partial wires 110, the second group of partial wires 120, and the third group of partial wires 130 by 180 degrees. For example, the closed loop versions 100-1 and 100-2 integrated in the RF coil 200 are centered to the center of symmetry of the RF coil 200, and the respective alignment directions of the closed loop versions 100-1 and 100-2 are Opposite each other.

Certain embodiments of the present invention provide an apparatus for performing magnetic field cancellation, wherein the apparatus is applicable to the electronic apparatus. The apparatus can include the radio frequency coils of the present invention (e.g., radio frequency coil 100, radio frequency coil 200, radio frequency coil 400, etc.). Additionally, the device can include (eg, a portion or all) of at least a portion of the electronic device. For example, the device can include the circuitry of the electronic device. By way of further example, the device can include the entirety of the electronic device. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

100, 100V, 200, 200V, 400, 500‧‧‧ RF coils
110‧‧‧First group of local wiring
120‧‧‧Second group of local wiring
130‧‧‧The third group of local wiring
100-1, 100-2, 200-1, 200-2‧‧‧ closed loop version
BP(0), BP(1), BP(2), BP(10), BP(11), BP(12)‧‧‧ fracture
301, 302, 401, 402‧‧‧ axes
510, 610‧‧‧ first floor
520, 620‧‧‧ second floor
530, 630‧‧‧ third floor
Aggressor (1), Aggressor (2) ‧‧‧ Violators coil
A‧‧‧First RF埠
B‧‧‧Second RF signal
BP(0), BP(1), BP(2), BP(10), BP(11), BP(12)‧‧‧ fracture
Crossing (1)‧‧‧ intersection

1 is a schematic diagram of a radio frequency coil having an unbalanced magnetic field canceling structure according to an embodiment of the present invention. 2 is a schematic diagram of a radio frequency coil having an unbalanced magnetic field canceling structure according to another embodiment of the present invention. 3 is a schematic diagram of an off-axis unbalanced magnetic field canceling scheme for a radio frequency coil having an unbalanced magnetic field canceling structure according to an embodiment of the present invention, wherein the radio frequency coil shown in FIG. 3 can be used as An example of the RF coil shown in Figure 1. 4 is a schematic diagram of an on-axis unbalanced magnetic field canceling scheme for the radio frequency coil shown in FIG. 3 according to an embodiment of the present invention. 5 is a schematic diagram of an even-turn IMAC (ETIMC) scheme for a radio frequency coil having an unbalanced magnetic field canceling structure according to an embodiment of the present invention, wherein the radio frequency shown in FIG. The coil can be used as an example of the RF coil shown in FIG. 6 is a schematic diagram showing an electromagnetic simulation setting of a radio frequency coil having an unbalanced magnetic field canceling structure according to an embodiment of the present invention, wherein the radio frequency coil shown in FIG. 6 can be used as an example of the radio frequency coil shown in FIG. . Figure 7 is a schematic illustration of a first layer of a first even-loop unbalanced magnetic field offset RF coil mask design in accordance with an embodiment of the present invention. Figure 8 is a schematic illustration of a second layer of the first even-numbered unbalanced magnetic field offset RF coil mask design in the embodiment of Figure 7. Figure 9 is a schematic diagram of a third layer of the first even-numbered unbalanced magnetic field offset RF coil reticle design in the embodiment of Figure 7. Figure 10 is a schematic illustration of a first layer of a second even-numbered unbalanced magnetic field offset RF coil reticle design in accordance with another embodiment of the present invention. Figure 11 is a schematic illustration of a second layer of the second even-numbered unbalanced magnetic field offset RF coil mask design in the embodiment of Figure 10. Figure 12 is a schematic diagram of a third layer of the second even-numbered unbalanced magnetic field offset RF coil reticle design in the embodiment of Figure 10. Figure 13 is a schematic illustration of a radio frequency coil having an unbalanced magnetic field cancellation architecture in accordance with another embodiment of the present invention.

Claims (20)

An RF coil having an unbalanced magnetic-cancelling (IMC) structure, the coil RF coil being applied to an electronic device, the coil RF coil comprising: a first RF coil for coupling the RF coil a radio frequency 至 to a circuit of the electronic device; a second RF port for coupling the RF coil to another RF port of the circuit of the electronic device; and a plurality of partial wirings, coupled Between the first RF 埠 and the second RF ,, wherein the plurality of partial wires comprise: a first group of partial wires connected in series, wherein the first group of partial wires are coupled to the first portion of the RF coil a second set of partial wirings connected in series, wherein the second set of partial wirings are coupled to the second RF 埠 of the RF coil; and a third set of partial wirings in series, wherein the third set of partial wirings Is coupled between the first group of partial wires and the second group of partial wires; wherein a second region formed by the first group of partial wires and the second group of partial wires is not In a first partial region by the third set of wires surrounded formed to provide the RF coil of the unbalanced field offset architecture. The RF coil of claim 1, wherein an end of the first set of partial wires is coupled to the first RF port of the RF coil; and an end of the second set of partial wires is coupled to the RF The second RF chirp of the coil. The radio frequency coil of claim 2, wherein the third set of local wiring is coupled between the other end of the first set of local wiring and the other end of the second set of local wiring. The radio frequency coil of claim 1, wherein the radio frequency coil comprises: a first turn of wiring, wherein the first turn of the wire comprises the first set of partial wires, the second set of partial wires, and the a third set of partial wirings; and a second loop of wiring, wherein the second loop of wiring includes a plurality of sets of partial wirings, wherein the plurality of sets of partial wirings are respectively used to simulate the first set of partial wirings in the first loop of wiring, the first Two sets of local wiring and the third set of partial wiring. The radio frequency coil of claim 4, wherein the first loop wiring is divided into two sub-turn wirings at a break of the first loop wiring; and the second loop wiring is inserted in the One end of one of the two sub-rings on one side of the break of the first turn wiring and the other of the two sub-rings on the other side of the break of the first turn wiring A sub-ring is routed between an end point. The radio frequency coil of claim 5, wherein the combination of the first loop wiring and the second loop wiring provides: a current path, wherein the current path starts from the first radio frequency, and the two sub-rings are routed The sub-ring wiring, the second loop wiring, and the other one of the two sub-ring wirings, and reaching the second RF chirp. The radio frequency coil of claim 4, wherein the radio frequency coil comprises: a first group of wirings, wherein the first group of wires comprises the first ring wire and the second ring wire; and a second group wiring, wherein the second group wiring comprises a plurality of turns of wiring for simulating the first loop wiring and the second loop wiring, respectively. The radio frequency coil of claim 7, wherein the first group wiring is divided into two sub-groups at a break of the first group wiring; and the second group wiring is inserted An end point of a subgroup of the two subgroups on a side of the fracture of the first group wiring and the two subsections on the other side of the fracture of the first group wiring Between an endpoint of another subgroup in the group. The radio frequency coil of claim 8, wherein the combination of the first group wiring and the second group wiring provides: a current path, wherein the current path starts from the first radio frequency, passing the two The subgroup in the subgroup, the second group wiring, and the other subgroup of the two subgroups, and the second radio frequency 到达. The radio frequency coil of claim 1, wherein the radio frequency coil is configured to reduce or eliminate electromagnetic (EM) interference from an adjacent coil. The radio frequency coil of claim 10, wherein the radio frequency coil is configured to reduce or eliminate electromagnetic interference from the adjacent coil, whether the adjacent coil is disposed at any position relative to the radio frequency coil. The radio frequency coil of claim 10, wherein the coil is not located on a first axis of the radio frequency coil; and the first set of local wiring and the second set of local wiring are located on one side of the first axis, and The third set of local wiring is located on the other side of the first axis. The radio frequency coil of claim 12, wherein the first axis is perpendicular to a second axis of the RF coil; and the first set of partial wires and a portion of the third set of partial wires are located on the second axis One side of the second set of partial wirings and the other of the third set of partial wirings are located on the other side of the second axis. The radio frequency coil of claim 10, wherein the coil is located on an axis of the radio frequency coil; and the first set of partial wirings and a portion of the third set of partial wirings are located on one side of the axis, and the second group The local wiring and another portion of the third set of partial wiring are located on the other side of the shaft. The radio frequency coil of claim 10, wherein the coil is located at an axis of the radio frequency coil, and the shaft passes through a center of the radio frequency coil; the radio frequency coil further includes to simulate the first group of local wiring, respectively a second set of partial wirings and a plurality of sets of partial wirings of the third set of partial wirings; and a combination of the first group of partial wirings, the second group of partial wirings, and the third group of partial wirings, and the plurality of sets of local The combination of wirings is centered at the center of the RF coil and has opposite alignment directions. The radio frequency coil according to claim 15, wherein a combination direction of the combination of the plurality of sets of partial wirings and a combination of the first group of partial wirings, the second group of partial wirings, and the third group of partial wirings The arrangement direction is 180 degrees apart. The radio frequency coil of claim 10, wherein the adjacent coil is in close proximity to the radio frequency coil. A device for performing magnetic field cancellation, the device being applied to an electronic device, the device comprising: an RF coil having an unbalanced magnetic-cancelling (IMC) architecture, the RF coil comprising: a first RF And a second RF port for coupling the RF coil to the RF of the circuit of the electronic device; The local wiring is coupled between the first RF 埠 and the second RF ,, wherein the plurality of partial wirings comprise: a first group of partial wirings connected in series, wherein the first group of partial wirings are coupled to the a second set of local wirings of the RF coil; a second set of partial wirings connected in series, wherein the second set of partial wirings are coupled to the second RF turns of the RF coil; and a third set of partial wirings in series, wherein The third group of local wiring is coupled between the first group of partial wires and the second group of partial wires; wherein a second region is formed by the first group of partial wires and the second group of partial wires A system different from the first region by the third set of local wiring is formed to surround, in order to provide the RF coil of the unbalanced field offset architecture. The device of claim 18, wherein an end of the first set of partial wires is coupled to the first RF port of the RF coil; and an end of the second group of partial wires is coupled to the RF coil The second RF 埠. The device of claim 19, wherein the third set of local wiring is coupled between another end of the first set of local wires and another end of the second set of local wires.