TWI396208B - Sectional inductor - Google Patents

Description

Segmented adjustable inductor

The invention relates to a segment-adjustable inductor, in particular to a segment-adjustable inductor which can be used in various high-frequency and microwave circuits.

In the family of electronic devices, the presence of a tunable inductor makes the fabrication of electronic circuits more flexible and convenient. In electronic circuits below a few hundred MHz, tunable inductors have been widely used, such as matching circuits, tuning circuits, and the like. However, when the frequency of use is higher, the existing centralized parameter adjustable inductor can not reflect the characteristics of the inductor, the frequency characteristic is deteriorated, the Q value becomes small, and the inductor use efficiency has been lost.

Therefore, the applicant submitted a patent application for adjustable inductors for various high frequency and microwave circuits in mainland China on May 10, 2004, and announced on January 26, 2005, patent number 200410027166.9, invention The name is a tunable inductor, and a tunable inductor is disclosed in the patent document, which can be used in a high frequency and microwave circuit, comprising a substrate, a fixed inductor formed by a metal microstrip line on the substrate, and a signal end. The tunable inductor further includes a conductive strip on the upper portion of the substrate for changing the geometry of the metal microstrip line of the effective inductance portion of the fixed inductor and an insulator for changing the contact surface of the conductive strip with the metal microstrip line of the fixed inductor. The insulator is adjacent to the conductive sheet. However, the above-mentioned adjustable inductor can only continuously adjust the inductance within a given range, and sometimes it is necessary to use only a few fixed inductance values in practical applications, and at this time, if the above-mentioned Adjustable inductors are time consuming to adjust and are more difficult to control to achieve the desired inductance.

The technical problem to be solved by the present invention is to provide a segment-adjustable inductor with a stepwise quantitative adjustment, which is applied in a situation where only a few fixed inductance values are used, which is relatively quick to adjust, and is relatively easy to control. The required inductance value.

In order to solve the above technical problem, the technical solution adopted by the present invention is to provide a segment-adjustable inductor, comprising: a base body, a signal input end, and a signal output end, wherein the segment-adjustable inductor is further included in the a plurality of fixed inductors on the substrate, wherein the fixed inductors are connected in series through the signal microstrip lines, and two ends of the series fixed inductors formed in series are respectively connected to the signal input end and the signal output end, and the segments are adjustable The inductor also includes at least one electrically conductive sheet or electrically controlled switch that controls the connection of the two ends of the fixed inductance to short the fixed inductance.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a segment-adjustable inductor including: a base body, a signal input end, and a signal output end, and the segment-adjustable inductor is further included in a plurality of fixed inductors on the substrate and at least one conductive strip or electronically controlled switch that controls the plurality of fixed inductors in parallel, and connected in parallel to form a parallel fixed inductor, wherein two ends of the parallel fixed inductor are respectively connected to the signal input The terminal is connected to the signal output.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a segment-adjustable inductor, comprising: a base body, a fixed inductance on the base body, and two ends of the fixed inductor directly The connected signal input terminal and the signal output terminal further comprise a conductive strip or an electronically controlled switch that controls the two ends of the fixed inductor to be connected to short the fixed inductor.

A further improvement of the above technical solution is that the electronically controlled switch is located in a surface layer or an inner layer of the base body, and the plurality of fixed inductors are located in the same layer or different layers of the base body.

The beneficial effects of the present invention are: since the segment-adjustable inductor of the present invention has one or more fixed inductors, the fixed inductor segment is disabled by a conductive sheet or an electronically controlled switch, thereby realizing the segment-adjustable inductor The segmentation of the inductance is quantitatively adjustable; in addition, since the plurality of fixed inductors of the segment-adjustable inductor of the present invention can be located in different layers of the substrate, the board area occupied by the fixed inductor and the inductance can be greatly saved. The amount is evenly adjusted in stages; in addition, the conductive sheet is connected to the 电感 of the fixed inductor without direct frictional contact with the fine fixed inductor, thereby improving the reliability of the device.

Therefore, the present invention has the following advantages: a. The segmentation quantitative precision adjustment of the inductance is realized in the high frequency and microwave frequency bands; b. the segmentation of the invention is within the same adjustment range due to the multi-layer segmentation adjustable The surface area of the adjustable inductor is greatly reduced; c. The fixed inductance is not limited to the microstrip line inductance, but also the discrete component inductance; d. Due to the optional rotary adjustment mode, the adjustment is convenient, and is applicable to various miniaturized electronic and communication circuits; e. The invention has simple structure, low production cost and is convenient for use in various circuits; f. is applicable to various tuning loops, filter circuits, matching loops, adjustment loops, control and stability loops, such as frequency stabilization, adjustment of electromagnetic coupling amount Use; g. is suitable for the requirements of high precision of the inductance, and the fixed inductance deviation is large, sometimes need to adjust the various parts of the circuit to meet the overall circuit characteristics; h. can be used as a laboratory for research and development adjustment, testing equipment; i. Can be integrated in a radio frequency integrated circuit (RFIC), a hybrid integrated circuit, and a monolithic microwave integrated circuit (MMIC).

Referring to FIG. 1, a segment-adjustable inductor according to a first embodiment of the present invention includes a base 3, a signal input end 1 on the surface of the base 3, a signal output end 2, and a signal microstrip line 11 and three for connecting the fixed inductor. Fixed inductors 7, 8, 9; wherein the fixed inductor 7 is a discrete fixed inductor, the fixed inductors 8 and 9 are microstrip fixed inductors, and the three fixed inductors 7, 8, 9 are connected in series via the signal strip 11 A series fixed inductor is formed, and two ends of the series fixed inductor are respectively connected to the signal input terminal 1 and the signal output terminal 2. The segment-adjustable inductor further includes a conductive sheet 4 for ineffective fixed inductance and an insulator 5 for moving or rotating the conductive sheet 4; the insulator 5 may be a printed circuit board, and the conductive sheet 4 is formed on a printed circuit board The printed circuit board can be made circular and easy to adjust. The center 6 of the printed circuit board and the center 6 of the base 3 are the same center; a positioning groove 10 can be disposed at the outer edge of the circular printed circuit board to define the rotation angle. The role. The surface of the printed circuit board on which the conductive sheet 4 is disposed is in contact with the surface of the base 3, that is, the surface of the signal microstrip line 11; by rotating the printed circuit board to rotate the position of the conductive sheet 4, the conductive sheet 4 respectively has a fixed inductance 7, The short-circuit at both ends of 8, 9 respectively invalidates the inductance, thereby making the segmentation of the inductance adjustable.

Referring to FIG. 2, the conductive sheet 4 of the segment-adjustable inductor of the first embodiment of the present invention invalidates the respective fixed inductors 7, 8, 9 and the signal input from the signal input terminal 1 does not pass through the fixed inductors 7, 8. 9, but directly transmitted to the signal output terminal 2 via the signal microstrip line 11 and the conductive sheet 4. The width of the conductive sheet 4 is preferably the same as the width of the signal microstrip line 11.

Referring to FIG. 3a, FIG. 3b, FIG. 3c and FIG. 3d, the segment-adjustable inductor of the second embodiment of the present invention is a multi-layered substrate segment-adjustable inductor, and the base 3 is a multi-layered substrate at the surface of the base 3. (the first layer) is provided with a signal input terminal 1, a signal output terminal 2, and a signal microstrip line 11 for connecting a fixed inductor; and FIGS. 3b, 3c and 3d respectively show the second layer 14 and the third layer which are formed on the base 3. The three fixed inductors 17, 18, 19 on the layer 15 and the fourth layer 16 are microstrip line inductors, and the two ends of the respective fixed inductors are respectively connected to the surface layer of the base body 3 through the through holes, wherein the two of the fixed inductors 17 The ends are respectively connected to the 埠20, 21 of the surface layer, and the two ends of the fixed inductor 18 are respectively connected to the 埠22, 23 of the surface layer, and the two ends of the fixed inductor 19 are respectively connected to the 埠24, 25 of the surface layer; the three fixed inductors pass the signal micro The strips 11 are connected in series to form a series fixed inductor, and the two ends of the series fixed inductor are respectively connected with the signal input end 1 and the signal output end 2; the segment adjustable inductor further includes a conductive strip 4 for short-circuiting the fixed inductor and Insulation 5 for moving or rotating the conductive sheet, insulated 5 may be a printed circuit board, the conductive sheet 5 is preferably made the same as the width of the microstrip signal line 11 in the width of the printed circuit board, the conductive sheet 5. The printed circuit board can be made circular and easy to adjust, and the center 6 of the printed circuit board and the center 6 of the base 3 are the same center. A positioning groove 10 may be provided at the outer edge of the circular printed circuit board to define a rotation angle. The side of the printed circuit board on which the conductive sheet 4 is placed is in contact with the side of the signal microstrip line 11 on the surface of the substrate 3. By rotating the printed circuit board to rotate the position of the conductive sheet 4, the conductive sheet 4 is short-circuited at both ends of the fixed inductor on the surface layer of the base 3, respectively, so that the fixed inductance is invalidated, thereby making the segmentation of the inductance adjustable.

Referring to FIG. 4, the segment-adjustable inductor of the third embodiment of the present invention is different from the segment-adjustable inductor of the second embodiment in that a plurality of fixed inductors are formed on the same layer 26 of the substrate. The two ends 20, 21, 22, 23, 24, 25, 26 of the three fixed inductors are connected by perforations and are respectively connected to the surface layer of the substrate.

Please refer to FIG. 5a, FIG. 5b, FIG. 5c and FIG. 5d, which are schematic diagrams showing the ineffective fixed inductance of the multi-section conductive sheet for the segment-adjustable inductor according to the fourth embodiment of the present invention. The conductive sheet may be a segmented combination of a plurality of conductive sheets, and the segmented conductive sheets may reduce an additional capacitive effect after the conductive sheets are in contact with the microstrip signal lines. Figure 5b is a schematic diagram of invalidating a fixed inductance, Figure 5c is a schematic diagram of invalidating two fixed inductances, and Figure 5d is a schematic diagram of invalidating three fixed inductances.

Referring to FIG. 6, the segment-adjustable inductor of the fifth embodiment of the present invention is different from the segment-adjustable inductor of the first embodiment in that it is a quantitatively uniform segment-adjustable inductor, and the fixed inductor 27 The inductance values of 28 and 29 are the same. The inductance decrement or increment of such a segmentally adjustable inductor is the same. It should be emphasized here that the segment-adjustable inductor of the present invention is bidirectionally adjustable, that is, its inductance can vary from large to small, and can vary from small to large.

Referring to FIG. 7, the segment-adjustable inductor of the sixth embodiment of the present invention is a segment-adjustable inductor composed of a single fixed inductor 30. The two ends of the fixed inductor 30 are directly connected to the signal input terminal 1 and the signal output terminal 2 Connected. By short-circuiting both ends of the fixed inductor 30 through the conductive sheet 4 or the electronically controlled switch, the inductance can be changed from zero to zero, and the inductance can be adjusted. The segment-adjustable inductor further includes an insulator for moving the position of the conductive sheet, the insulator being adjacent to one side of the conductive sheet, and the other side of the conductive sheet being adjacent to the surface layer of the substrate. The insulator is a printed circuit board, and the conductive sheet is formed on the printed circuit board, and an outer edge of the printed circuit board is provided with a positioning groove. The fixed inductor is a microstrip line inductor or a discrete inductor; if the fixed inductor is a microstrip line inductor, the fixed inductor is located in a surface layer or an inner layer of the base; when the fixed inductor is located at the base An inner layer, and controlling the two ends of the fixed inductor to be connected such that the fixed inductor is short-circuited by the conductive sheet, both ends of the fixed inductor are connected to a surface layer of the base; if the fixed inductor is discrete Inductance, the fixed inductance is located on the surface layer of the substrate. The electrical control switch is located at a surface layer or an inner layer of the base body, and the fixed inductor and the electronically controlled switch are located at the same layer or different layers of the base body; if the electronically controlled switch and the fixed inductor are different layers, Then, both ends of the fixed inductor are connected to the layer where the electronic control switch is located.

Referring to FIG. 8a and FIG. 8b, the segment-adjustable inductor of the seventh embodiment of the present invention uses an electrically controlled switch mode to ineffectively. The fixed inductors 32, 33, 34 and the electronically controlled switch 31 may not be in the same layer of the base 3. The two ends of the fixed inductors 32, 33, 34 are respectively connected to the surface layer of the base 3 through the through holes, wherein the two ends of the fixed inductor 32 are respectively connected. To the 埠20, 21 of the surface layer, the two ends of the fixed inductor 33 are respectively connected to the 埠22, 23 of the surface layer, and the two ends of the fixed inductor 34 are respectively connected to the 埠24, 25 of the surface layer; the three fixed inductors pass the signal microstrip line 11 In series, a series fixed inductor is formed, and two ends of the series fixed inductor are respectively connected to the signal input terminal 1 and the signal output terminal 2. The segment-adjustable inductor further includes at least one electronically controlled switch for short-circuiting the fixed inductor. Here, three electronically controlled switches are used, and the two signal terminals of each of the electronically controlled switches are respectively connected to the two ends of the respective fixed inductors. The external control signal is used to close or open the electronic control switch 31. When the electronic control switch 31 is closed, the connected fixed inductance can be invalidated, and the inductance segment can be adjusted. The electronic control switch can be a microwave high-speed switch tube (such as a PIN tube) or a field effect tube (FET) as a switch tube. When designing the electronically controlled switch, it is necessary to consider the mutual isolation of the switch trigger signals (control signals) between the electronically controlled switches. A coupling capacitor can be added between the electronically controlled switches. The function of the coupling capacitor is to pass the RF microwave signals and hinder the switch from being triggered. The signal passes. The switch trigger signal is typically a lower frequency signal. A high-impedance line is added between the switch trigger signal and the electronically controlled switch, and the function is to prevent the RF microwave signal from leaking from the switch trigger signal.

It should be emphasized here that the electronically controlled switch can be made on the surface or inner layer of the substrate. For example, when the substrate is a germanium or gallium arsenide matrix, the electronically controlled switch and the fixed inductor can be integrated in the base body. In monolithic microwave integrated circuits (MMICs), inductors and active circuits are widely integrated.

Please refer to Figure 9, which is a physical cross-section of a segmentally adjustable inductor. For the convenience of rotation, a rotating adjustment shaft 36 is mounted on the printed circuit board of the conductive sheet and the center of the base 3, and an elastic spacer 39 is mounted between the printed circuit board and the outer casing 38 of the segment-adjustable inductor. The spacer 39 is rigid in the direction of rotation and elastic in the up and down direction. After the adjustment, the position of the printed circuit board remains unchanged, and the conductive sheet is stably contacted with the signal microstrip line. A rubber washer 37 is arranged on the inner side of the adjusting shaft 36 and the outer casing 38 for stabilizing. A positioning post is arranged in the outer casing 38 to cooperate with the positioning groove 10 (not shown) to limit the rotation adjustment angle. The goal is to prevent over-regulation.

When the segment-adjustable inductor has only one fixed inductor, this is a special case. The way to change the inductance is the same in series or parallel mode. The two ends of the fixed inductor are connected to the signal input terminal and the signal output terminal respectively. It is necessary to short-circuit the two ends of the fixed inductor with a conductive sheet or with an electric control switch, so that the inductance can be adjusted from no change or no change.

The following is a detailed description of the segmented adjustable inductor composed of parallel modes.

Referring to FIG. 10a, the segment-adjustable inductor of the eighth embodiment of the present invention is a multi-layer segment-adjustable inductor formed by connecting three fixed inductors in parallel. Referring to FIG. 10b, FIG. 10c, and FIG. 10d, the three fixed inductors L1, L2, and L3 are each a microstrip inductor, which are respectively fabricated on different layers of the multilayer substrate 3, and are respectively etched through the perforations to the surface of the substrate. ; 83, 84; 85, 86 phase connection, the three fixed inductors L1, L2, L3 are connected through the conductive sheets 41, 42 respectively, forming a parallel inductor; of course, one of the three fixed inductors L1, L2, L3 It is also possible to fix the connection, and the other ends of the three fixed inductors L1, L2, and L3 are controlled to be connected by a conductive sheet or an electronically controlled switch. Both ends of the parallel inductor are respectively connected to the signal input terminal 1 and the signal output terminal 2. The two ends of one of the fixed inductors can be directly connected to the signal input terminal 1 and the signal output terminal 2, such as 埠81, 82. The movement of the conductive sheets 41, 42 is moved by the insulator 5, where the insulator is a circular printed circuit board for easy adjustment, and the outer edge of the printed circuit board is formed with a positioning groove 10 for the purpose of limiting the conductive sheet 41, 42 the range of movement, the conductive sheets 41, 42 are formed on the printed circuit board, and the side of the conductive sheets 41, 42 is in contact with the surface layer of the base 3. By rotating the printed circuit board, the conductive sheets 41, 42 are rotated, thereby dissociating or adding the respective fixed inductors, thereby changing the number of parallel fixed inductors, thereby completing the adjustment of the inductance.

The following is a detailed description of the adjustment process of the inductance of the parallel segmented adjustable inductor. Please refer to FIG. 11A, FIG. 11a, FIG. 11B, FIG. 11b, FIG. 11C, FIG. 11c, FIG. 11D, and FIG. 11d, which show the inductance adjustment process of the segment-adjustable inductor in parallel mode. On the surface layer of the substrate, two conductive inductors L1, L2, and L3 are respectively connected in parallel by two conductive sheets 41 and 42 to form a parallel fixed inductor, and the two ends of the parallel fixed inductor are respectively connected to the signal input terminal 1 The signal output terminals 2 are connected.

Referring to FIG. 11A, the conductive sheet 41 connects the 埠81, 83, 85, the signal input end 1 and the signal output end 2, and the conductive sheet 42 connects the 埠82, 84 and 86. At this time, it corresponds to the conductive sheet 41 directly. The signal input terminal 1 and the signal output terminal 2 are connected. Of course, an electronic control switch or a straight through conductive plate may be separately disposed between the signal input terminal 1 and the signal output terminal 2; the equivalent circuit is as shown in FIG. 11a. The segmented adjustable inductor has zero inductance. Here, it is to be noted that the manner in which the inductances in which L1, L2, and L3 are connected in parallel is short-circuited to zero is the same as that of FIG.

Referring to FIG. 11B, the printed circuit board is rotated counterclockwise so that the conductive sheet 41 is not connected to the signal output end 2, and the conductive sheet 42 is also rotated at the same time, but the arc sheet length of the conductive sheet 42 is required to have a certain margin in the conductive sheet. When the 41 and 埠85 remain connected, the conductive sheet 42 also maintains the connection with the 埠86. The equivalent circuit is as shown in FIG. 11b, and the inductance of the segment-adjustable inductor is the parallel inductance of L1, L2, and L3.

Referring to FIG. 11C, the printed circuit board is rotated counterclockwise, so that the conductive sheet 41 is not connected to the 埠85, and the conductive sheet 42 is not connected to the 埠86. The equivalent circuit is shown in FIG. 11c, and the segmented adjustable inductor is shown. The inductance is the parallel inductance of L1 and L2.

Referring to FIG. 11D, the printing circuit board is rotated counterclockwise, so that the conductive sheet 41 is not connected to the crucibles 83 and 85, and the conductive sheet 42 is not connected to the crucibles 84 and 86. The equivalent circuit is as shown in FIG. 11d. The inductance of the segment-adjustable inductor is the inductance of L1. It should be noted that the printing circuit board can be rotated counterclockwise in a small amount to make the conductive sheets 41 and 42 off the signal end, so as not to cause the conductive sheet to have a capacitive effect on the signal, but the rotation cannot be excessive, and the conductive sheet 41 and the signal are prevented. The outputs are connected, in which case the positioning slots act to limit excessive rotation.

In addition, only one conductive piece 41 is needed to adjust the inductance, that is, one end of the parallel fixed inductor is connected by the conductive piece 41, and the other end is directly connected to the signal output end 2, but this is used as a high frequency of the parallel fixed inductor. Microwave characteristics are not good. Therefore, in this embodiment, two conductive sheets are selected to connect the parallel fixed inductors. The fixed inductance can be a microstrip line inductor, a discrete inductor, or a combination thereof. When a discrete inductor is used, it can be fabricated on the surface of the substrate.

The following describes an implementation of a parallel segmented adjustable inductor using an electrically controlled switch and a fixed inductor.

Referring to FIG. 12A, FIG. 12a, FIG. 12B, FIG. 12b, FIG. 12C, FIG. 12c, FIG. 12D, and FIG. 12d, the inductance adjustment process of the segment-adjustable inductor is shown. The segment-adjustable inductor includes at least two fixed inductors. Here, three fixed inductors L1, L2, and L3 are selected, and the three fixed inductors still use microstrip inductors. Please refer to FIG. 10b, FIG. 10c, and FIG. 10d, respectively. Manufactured on different layers of the multilayer substrate 3, and connected to the 埠81, 82; 83, 84; 85, 86 of the surface layer of the substrate by perforations respectively, the three fixed inductors respectively pass through four electronically controlled switches k2, k3, k4 After the k5 phase is connected, a parallel inductor is formed. Both ends of the parallel fixed inductor are respectively connected to the signal input terminal 1 and the signal output terminal 2. The fixed inductors L1, L2, L3 and the electronically controlled switch may not be in the same layer of the base. As can be seen from Figure 12A, it also has an electronically controlled switch k1, which acts to zero the inductance. We can understand the parallel fixed inductor formed by connecting L1, L2, and L3 in parallel as an inductor. The effect of k1 is exactly the same as that of the conductive sheet in FIG. When k1 is closed, the signal input is connected to the output, and the inductance of the segment-adjustable inductor is zero. Figure 12a is an equivalent circuit of Figure 12A.

Referring to FIG. 12B, k1 is disconnected, k2, k3, k4, and k5 are closed, and the parallel fixed inductor is a parallel connection of L1, L2, and L3. The inductance of the segment-adjustable inductor is the parallel inductance of L1, L2, and L3. . Figure 12b is an equivalent circuit diagram of Figure 12B.

Referring to FIG. 12C, k1, k3, and k5 are disconnected, k2 and k4 are closed, and the parallel fixed inductors are connected in parallel with L1 and L2. The inductance of the segment-adjustable inductor is the parallel inductance of L1 and L2. Figure 12b is an equivalent circuit of Figure 12B.

Referring to FIG. 12D, k1, k2, k3, k4, and k5 are disconnected, and the parallel fixed inductor is L1. The inductance of the segment-adjustable inductor is the inductance of L1. Figure 12d is an equivalent circuit of Figure 12D.

The closing and opening of the electronic control switch is controlled by an external trigger signal. The electronic control switch can be a microwave high-speed switch tube (such as a PIN tube) or a field effect transistor (FET) as a switch tube. When designing the electronically controlled switch, it is necessary to consider the mutual isolation of the switch trigger signals (control signals) between the electronically controlled switches. A coupling capacitor can be added between the electronically controlled switches. The function of the coupling capacitor is to pass the RF microwave signals and hinder the switch from being triggered. The signal passes. The switch trigger signal is typically a lower frequency signal. A high-impedance line is added between the switch trigger signal and the electronically controlled switch, and the function is to prevent the RF microwave signal from leaking from the switch trigger signal.

The electronically controlled switch can be fabricated on the surface or inner layer of the substrate. For example, when the substrate is a germanium or gallium arsenide matrix, the electronically controlled switch and the fixed inductor can be integrated in the base body. In monolithic microwave integrated circuits (MMICs), inductors and active circuits are widely integrated.

In addition, when the fixed inductor is connected in parallel or disconnected, it is only necessary to provide an electronically controlled switch at one end of the fixed inductor, and it is not necessary to provide an electronically controlled switch at both ends. For example, in the example of FIG. 12, the electronically controlled switches k4, k5 It is not necessary to connect the 埠84 and 86 directly to the signal output terminal 2, and the inductance can be adjusted. That is, one end of the parallel fixed inductor is connected by an electric control switch, and the other end is directly connected to the signal output end, but The high-frequency microwave characteristics of the parallel fixed inductors are not good. The fixed inductance can be a microstrip line inductor, a discrete inductor, or a combination thereof. When a discrete inductor is used, it can be fabricated on the surface of the substrate.

Please refer to FIG. 13 , which is a theoretical graph of the segmented adjustable inductor using a parallel fixed inductance to change the inductance. The vertical axis is the inductance and the horizontal axis is the parallel state of the fixed inductance.

Please refer to FIG. 14 , which is a theoretical graph of the segmented adjustable inductor using series fixed inductance to change the inductance. The vertical axis is the inductance and the horizontal axis is the series connection of the fixed inductance.

The fixed inductance of the segment-adjustable inductor of the present invention may be one or more, and one or more fixed inductors may be fabricated in each layer of the substrate, and the shape of the microstrip line inductor may be spiral, serpentine, open square, single Linear and so on.

The substrate may be a printed circuit board having high frequency or microwave characteristics, but is not limited to a printed circuit board, and the substrate may be other materials such as a semiconductor base material such as germanium (Si) or gallium arsenide (GaAs). These materials are widely used as substrates in radio frequency integrated circuits (RFICs) and monolithic microwave integrated circuits (MMICs).

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included. It is within the scope of the invention.

Matrix. . . 3

Signal input. . . 1

Signal output. . . 2

Signal microstrip line. . . 11

Fixed inductance. . . 7, 8, 9

Conductive sheet. . . 4

Insulator. . . 5

Center of the circle. . . 6

Positioning slot. . . 10

1 is a schematic view of a segment-adjustable inductor according to a first embodiment of the present invention.

2 is a schematic view showing the conductive sheets of the segment-adjustable inductor of the first embodiment of the present invention invalidating the respective fixed inductors.

3a is a schematic diagram of a segmentally adjustable inductor in accordance with a second embodiment of the present invention.

3b, 3c, and 3d are schematic views of three fixed inductors on the second, third, and fourth layers of the substrate of the segment-adjustable inductor of the second embodiment of the present invention, respectively.

4 is a schematic diagram of a fixed inductance of a segment-adjustable inductor according to a third embodiment of the present invention.

5a, 5b, 5c, and 5d are schematic diagrams showing the ineffective fixed inductance of the multi-section conductive sheet for the segment-adjustable inductor according to the fourth embodiment of the present invention.

6 is a schematic diagram of a segment-adjustable inductor according to a fifth embodiment of the present invention.

7 is a schematic diagram of a segment-adjustable inductor according to a sixth embodiment of the present invention.

8a and 8b are schematic diagrams of a segment-adjustable inductor according to a seventh embodiment of the present invention.

Figure 9 is a physical cross-sectional view of a segmentally adjustable inductor.

Figure 10a is a schematic illustration of a segmentally adjustable inductor in accordance with an eighth embodiment of the present invention.

10b, 10c, and 10d are schematic views of three fixed inductors on different layers of the base of the segment-adjustable inductor of the eighth embodiment of the present invention, respectively.

11A, 11a, 11B, 11b, 11C, 11c, 11D, and 11d are schematic diagrams of the inductance adjustment process of the segment-adjustable inductor in parallel mode.

12A, 12a, 12B, 12b, 12C, 12c, 12D, and 12d are schematic diagrams of an inductance adjustment process of an electrically modulated segmented adjustable inductor.

FIG. 13 is a theoretical graph of the segmented adjustable inductor of the present invention using a parallel fixed inductance method to change the inductance.

FIG. 14 is a theoretical graph of the segmented adjustable inductor of the present invention using a series fixed inductance method to change the inductance.

Matrix. . . 3

Signal input. . . 1

Signal output. . . 2

Signal microstrip line. . . 11

Fixed inductance. . . 7, 8, 9

Conductive sheet. . . 4

Insulator. . . 5

Center of the circle. . . 6

Positioning slot. . . 10

Claims (12)

A segment-adjustable inductor includes: a base body, a signal input end, and a signal output end, the segment-segmented inductor further includes a plurality of fixed inductors on the base body, the fixed inductors being connected in series by a signal microstrip line, Two ends of the series fixed inductor formed in series are respectively connected to the signal input end and the signal output end, and the segment adjustable inductor further includes at least one conductive wire for controlling the two ends of the fixed inductor to be short-circuited to the fixed inductor. Chip or electronically controlled switch. The segment-adjustable inductor according to claim 1, wherein the segment-adjustable inductor further comprises an insulator for moving the position of the conductive sheet, the insulator being adjacent to one side of the conductive sheet The other side of the conductive sheet is adjacent to the surface layer of the substrate. The segment-adjustable inductor according to claim 2, wherein the insulator is a printed circuit board, and the conductive sheet is formed on the printed circuit board, and the outer edge of the printed circuit board is provided with a positioning groove. The segment-adjustable inductor according to claim 1, wherein the fixed inductor is a microstrip line inductor or a discrete inductor; if the fixed inductor is a microstrip line inductor, the fixed inductor is located at the surface layer Or an inner layer; when the fixed inductor is located in the inner layer of the substrate, and the two ends of the fixed inductor are connected to be short-circuited by the conductive sheet, the two ends of the fixed inductor are connected to the surface layer of the substrate; The fixed inductor is a discrete inductor, and the fixed inductor is located on the surface of the substrate. The segment-adjustable inductor according to claim 1, wherein the electronic control The switch is located on the surface layer or the inner layer of the substrate, and the plurality of fixed inductors and the electronic control switch are located in the same layer or different layers of the base body. If the electronic control switch is different from the fixed inductor, the two ends of the fixed inductor are connected. Go to the layer where the electronic control switch is located. A segment-adjustable inductor includes: a base body, a signal input end, and a signal output end, the segment-segmented inductor further includes a plurality of fixed inductors on the base body and at least one conductive unit that controls the plurality of fixed inductors in parallel The chip or the electronically controlled switch is connected in parallel to form a parallel fixed inductor, and the two ends of the parallel fixed inductor are respectively connected with the signal input end and the signal output end. The segment-adjustable inductor according to claim 6, wherein one end of the plurality of fixed inductors is fixedly connected, and the other ends of the plurality of fixed inductors are controlled to be connected by the conductive sheet or the electronically controlled switch; Or both ends of the plurality of fixed inductors are controlled to be connected by the conductive sheet or the electronically controlled switch to form a parallel fixed inductor. The segment-adjustable inductor of claim 6, wherein the segment-adjustable inductor further comprises an insulator for moving the position of the conductive sheet, the insulator being adjacent to one side of the conductive sheet The other side of the conductive sheet is adjacent to the surface layer of the substrate. The segment-adjustable inductor according to claim 8, wherein the insulator is a printed circuit board, and the conductive sheet is formed on the printed circuit board, and the outer edge of the printed circuit board is provided with a positioning groove. a segment-adjustable inductor according to claim 6, wherein the solid The fixed inductor is a microstrip line inductor or a discrete inductor; if the fixed inductor is a microstrip line inductor, the fixed inductor is located at a surface or inner layer of the substrate; when the fixed inductor is located in the inner layer of the substrate, and the fixed is controlled When the two ends of the inductor are connected such that the short circuit of the fixed inductor is realized by the conductive sheet, both ends of the fixed inductor are connected to the surface layer of the base; if the fixed inductor is a discrete inductor, the fixed inductor is located on the surface layer of the base. The segment-adjustable inductor according to claim 6, wherein the electronically controlled switch is located on a surface layer or an inner layer of the base body, and the plurality of fixed inductors and the electronically controlled switch are located on the same layer or different layers of the base body. If the electronic control switch is different from the fixed inductor, both ends of the fixed inductor are connected to the layer where the electronic control switch is located. The segment-adjustable inductor according to claim 6, wherein the signal input end and the signal output end are directly connected through the conductive sheet, and an electronic control can be set between the signal input end and the signal output end. Switch or straight through the conductive sheet.