A coreless power divider, electronic equipment and method for setting phase of power divider

Abstract

The present invention provides a coreless power divider and a method for setting the phase. The power divider includes: an input end, an external load end, a first output end, a second output end, a first coil, a second coil, a first capacitor and a second capacitor, wherein the first coil is connected between the input end and the first output end; the second coil is connected between the external load end and the second output end; the first coil and the second coil are coils within a preset number of windings, and there is a hollow limiting cavity between the first coil and the second coil, and the cross-sectional area of ​​the limiting cavity is a preset area, and the preset number of windings and the preset area have a preset corresponding relationship. The method includes winding two coils with a preset number of windings to form a first coil and a second coil; adjusting the cross-sectional area of ​​the limiting cavity of the first coil and the second coil according to the preset area. The coreless power divider and the method for setting the phase provided by the present invention enable the phase value of the power divider to be any set phase, meeting social needs.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and in particular to a coreless power divider, electronic equipment and a method for setting a phase of a power divider. Background Art

[0002] With the rapid development of wireless communication technology, the related technologies of power dividers, as important components of the system, have also been widely and deeply studied. A power divider is a power distributor, which is a device that divides the energy of an input signal into two or more equal or unequal outputs. Power dividers are generally used for power distribution and power combination, and are mainly used in radio frequency circuits such as balanced power amplifiers, balanced mixers and antenna arrays.

[0003] Existing power dividers are generally provided with a magnetic core. For example, the patent application number is 2017103359607, and the name is electronic equipment and its power divider. The disclosed power divider includes: a housing, pins, capacitors, resistors and inductors, wherein the inductor includes a magnetic core, a first inductor and a second inductor. Since the magnetic core closes the magnetic flux lines, the magnetic field strength is enhanced, and the inductance is too large, the phase of the existing power divider is generally 0 degrees or 180 degrees. With the development of science and technology, the application field of power dividers is becoming wider and wider. The existing power dividers with a winding phase of 0 degrees or 180 degrees cannot meet the application requirements, and power dividers with other phases are needed. Summary of the invention

[0004] In order to realize a power divider with a specific phase, the present invention provides a coreless power divider, an electronic device and a method for realizing setting the phase of the power divider.

[0005] A coreless power divider comprises: an input end, an external load end, a first output end, a second output end, a first coil, a second coil, a first capacitor and a second capacitor, wherein:

[0006] A first coil connected between the input terminal and the first output terminal;

[0007] A second coil connected between the external load terminal and the second output terminal;

[0008] A first capacitor, one end of which is connected between the first output terminal and the first coil, and the other end of which is connected between the second coil and the second output terminal;

[0009] A second capacitor, one end of which is connected between the input terminal and the first coil, and the other end of which is connected between the second coil and the external load terminal;

[0010] The first coil and the second coil are coils with a preset number of windings, a hollow limiting cavity is formed between the first coil and the second coil, the coils surround the limiting cavity, and the area of ​​the cross section of the limiting cavity is a preset area, wherein:

[0011] The preset number of winding coils and the preset area have a preset corresponding relationship, so that the coreless power divider has a set phase value.

[0012] Furthermore, the phase value is set to 90°.

[0013] Furthermore, the coreless power divider also includes a non-magnetic limiting block located in the limiting cavity, and the first coil and the second coil are wound around the limiting block.

[0014] Furthermore, the limit block is a plastic limit block.

[0015] Furthermore, the limiting block is cylindrical and has two parallel through holes in the middle, and the first coil and the second coil are wound in the through holes.

[0016] Furthermore, the limiting block is in an I-shape, and the first coil and the second coil are wound around the middle of the I-shaped limiting block.

[0017] Furthermore, the limit block is bonded to the PCB board by epoxy resin glue.

[0018] Furthermore, the first capacitor and the second capacitor are chip capacitors and are soldered on the PCB board.

[0019] The present invention also provides an electronic device, comprising: a signal input module, a first signal output module, a second signal output module, a grounding resistor and the above-mentioned coreless power divider; wherein the signal input module is connected to the input end of the coreless power divider, the first signal output module is connected to the first output end of the coreless power divider, the second signal output module is connected to the second output end of the coreless power divider, and the grounding resistor is connected to the external load end of the coreless power divider.

[0020] The present invention also provides a power divider phase realization method, which is applied to a coreless power divider, comprising: an input end, an external load end, a first output end, a second output end, a first coil, a second coil, a first capacitor and a second capacitor, wherein the method comprises: obtaining a preset number of winding coils and a preset area according to a set phase value of the coreless power divider, a correspondence between the set phase value and a preset number of winding coils, and a preset area of ​​a limiting cavity; winding two coils with a preset number of winding coils to respectively form a first coil and a second coil having a hollow limiting cavity; adjusting the area of ​​a cross section of the limiting cavity according to the preset area;

[0021] The first coil is connected between the input terminal and the first output terminal; the second coil is connected between the external load terminal and the second output terminal; one end of the first capacitor is connected between the first output terminal and the first coil, and the other end is connected between the second coil and the second output terminal; one end of the second capacitor is connected between the input terminal and the first coil, and the other end is connected between the second coil and the external load terminal.

[0022] Furthermore, the method also includes: selecting a non-magnetic limit block according to a preset area; placing the limit block in the limit cavity; and winding the first coil and the second coil around the limit block.

[0023] A coreless power divider and a method for setting the phase provided by the present invention have at least the following beneficial effects: by removing the magnetic core in the power divider, the coils are wound with a preset number of windings and a preset area of ​​the cross-section of the limiting cavity to form a first coil and a second coil, so that the coreless power divider reaches the set phase value.

[0024] In addition, after removing the magnetic core, in order to bind the first coil and the second coil, a non-magnetic limit block is added, so as to avoid generating interference signals while shaping the first coil and the second coil to prevent the first coil and the second coil from being loose. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a circuit schematic diagram of a coreless power divider in one embodiment of the present invention;

[0027] Figure 2 A schematic diagram of external terminal pins of a coreless power divider in an embodiment of the present invention;

[0028] Figure 3 Schematic diagram of the internal structure of a coreless power divider in another embodiment of the present invention;

[0029] Figure 4 A flow chart of a method for setting the phase of a power divider in an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the structure of an electronic device in an embodiment of the present invention;

[0031] P1-input end, P2-external load end, P3-first output end, P4-second output end, C1-first capacitor, C2-second capacitor, L1-first coil, L2 second coil, 1-limiting block, 500-electronic device, 501-signal input module, 502-grounding resistor, 503-coreless power divider, 504-first signal output module, 505-second signal output module. DETAILED DESCRIPTION

[0032] The terms and expressions used in the present specification are for illustration only and are not intended to be limiting. It should be understood by those skilled in the art that various changes may be made to the details of the above embodiments without departing from the basic principles of the disclosed embodiments. Therefore, the scope of the present invention is determined solely by the claims, in which, unless otherwise indicated, all terms should be understood in the broadest reasonable sense.

[0033] In one embodiment of the present invention, Figure 1 As shown, the coreless power divider includes an input terminal P1, an external load terminal P2, a first output terminal P3, a second output terminal P4, a first coil L1, a second coil L2, a first capacitor C1 and a second capacitor C2, wherein the first coil L1 is connected between the input terminal P1 and the first output terminal P3; the second coil L2 is connected between the external load terminal P2 and the second output terminal P4; the first capacitor C1 has one end connected between the first output terminal P3 and the first coil L1, and the other end connected between the second coil L2 and the second output terminal P4; the second capacitor C2 has one end connected between the input terminal P1 and the first coil L1, and the other end connected between the second coil L2 and the external load terminal P2.

[0034] When in use, an input signal enters the coreless power divider from the input terminal P1, and the coreless power divider divides the input signal into two output signals which are output from the first output terminal P3 and the second output terminal P4 respectively.

[0035] The first capacitor C1 and the second capacitor C2 play an isolation role, thereby avoiding interference between the two output terminals or the input terminal and the external load terminal. The first capacitor C1 is used to improve the isolation index of the two output terminals of the power divider, and the second capacitor C2 is used to improve the isolation index between the input terminal and the external load terminal. Of course, isolation can also be achieved by using an isolation resistor instead of a capacitor, and the present invention does not limit this. The external load terminal P2 is used to connect an external resistor to achieve impedance balancing.

[0036] In this embodiment, the first coil L1 and the second coil L2 are coils with a preset number of windings, a hollow limiting cavity is formed between the first coil L1 and the second coil L2, the coils surround the limiting cavity, and the cross-sectional area of ​​the limiting cavity is a preset area, wherein the preset number of windings and the preset area have a preset corresponding relationship, so that the coreless power divider has a set phase value. It should be noted that in this embodiment, the cross-sectional area of ​​the limiting cavity refers to the cross-sectional area of ​​the limiting cavity parallel to the first coil L1 and the second coil L2.

[0037] The coreless power divider in this embodiment removes the traditional power divider core component to avoid the core closing the magnetic flux lines, increasing the magnetic field strength, and making the inductance too large, which results in the winding phase being unable to achieve a phase value other than 0° or 180°.

[0038] Since the factor that affects the phase value is mainly inductance, the set phase value can be achieved by adjusting the inductance. The factor that affects the inductance is mainly the number of winding coils. The larger the number of winding coils, the greater the inductance. According to the correspondence between the set phase value and the preset number of winding coils and the preset area, the preset number of winding coils and the preset area are determined, and the number of winding coils of the first coil L1 and the second coil L2 and the area of ​​the cross section of the limit cavity are adjusted in turn to be consistent with the preset number of winding coils and the preset area, so that the phase value of the power divider reaches the set phase value.

[0039] In this embodiment, the preset number of winding coils and the preset area are determined according to the set phase value. Specifically, the corresponding relationship between the set phase value and the number of winding coils of the first coil L1 and the second coil L2 and the preset area of ​​the cross section of the limiting cavity can be verified through a limited number of experiments. According to this corresponding relationship, when the set phase value is known, the preset number of winding coils and the preset area are determined, so that the power divider reaches the set phase value.

[0040] The experimental verification process is that, according to the set phase value, the number of turns of the first coil L1 and the second coil L2 is first adjusted to make the phase value of the coreless power divider close to the set phase value. This step can be understood as a rough adjustment of the number of turns of the first coil L1 and the second coil L2. Then, the area of ​​the cross-section of the limiting cavity of the first coil L1 and the second coil L2 is adjusted. When the area of ​​the cross-section of the limiting cavity of the first coil L1 and the second coil L2 is adjusted, the size of the first coil L1 and the second coil L2 will be changed, thereby affecting the number of turns of the first coil L1 and the second coil L2. This step can be understood as a fine adjustment of the number of turns of the first coil L1 and the second coil L2, which will increase or decrease the number of turns of the first coil L1 and the second coil L2. For example, the original number of turns is 10 turns, and after fine adjustment, it becomes 10.6 turns, etc. At this time, 10.6 turns is the preset number of turns mentioned in the present invention, and the area of ​​the cross-section of the limiting cavity corresponding to the preset number of turns is the preset area.

[0041] In another embodiment of the present invention, the phase value is set to 90°, and the number of windings of the first coil L1 and the second coil L2 and the cross-sectional area of ​​the limiting cavity required when the phase value is 90° are determined according to the set phase value of 90° and the corresponding relationship between the set phase value and the preset number of windings and the preset area, and they are used as the preset number of windings and the preset area, so as to achieve the phase value of the power divider reaching the set phase value of 90°.

[0042] In another embodiment of the present invention, Figure 3 As shown, the coreless power divider further includes a non-magnetic limiting block 1, which is located in the limiting cavity, and the first coil L1 and the second coil L2 are wound around the limiting block 1; Figure 3The stopper block 1 is a double-hole stopper block, and the first coil L1 and the second coil L2 are wound in the double holes of the stopper block 1. Therefore, the area of ​​the cross section of the interval formed between the double holes of the stopper block 1 is the preset area. Of course, the stopper block 1 can also be in other shapes, such as a columnar or I-shaped shape, etc., and the present invention is not limited to this.

[0043] Since the magnetic core has the function of fixing the first coil L1 and the second coil L2 on the power divider, when the magnetic core in the power divider is removed, the first coil L1 and the second coil L2 cannot be shaped. Therefore, after removing the magnetic core in the power divider, a non-magnetic limit block 1 is used to replace the magnetic core and is set in the hollow limit cavity of the first coil and the second coil, which can restrain the first coil and the second coil and prevent the first coil and the second coil from loosening.

[0044] In another embodiment of the present invention, the limit block 1 is a plastic limit block. The limit block made of plastic can replace the magnetic core to avoid the failure to reach the set phase value due to excessive inductance generated by the magnetic core, and can also avoid the generation of interference signals. Of course, the limit block 1 can also be made of other materials, as long as the material is non-magnetic, and the present invention is not limited to this.

[0045] In another embodiment of the present invention, Figure 3 As shown, the limiting block 1 is cylindrical and has two parallel through holes in the middle, and the first coil L1 and the second coil L2 are wound in the two parallel through holes.

[0046] In another embodiment of the present invention, the limiting block 1 is in an I-shape, and the first coil L1 and the second coil L2 are wound around the middle of the I-shaped limiting block.

[0047] The above two shapes of the limit blocks are only two implementation methods. The limit block 1 can also adopt other shapes such as a cylinder, and the present invention is not limited to this.

[0048] In another embodiment of the present invention, the limit block 1 is bonded to the PCB board by epoxy resin adhesive, so that the connection between the limit block 1 and the PCB board is more firm, and the reliability of the power divider is higher. Specifically, during manufacturing, a layer of epoxy resin adhesive is firstly covered on the PCB board, and then the limit block 1 is fixed to the PCB board using a SMT (Surface Mounted Technology) process using a chip mounter.

[0049] In another embodiment of the present invention, the first capacitor C1 and the second capacitor C2 are chip capacitors and are soldered on a PCB. Specifically, the SMT technology is used to apply solder paste on the PCB, and the chip capacitor is accurately placed on the pad coated with the solder paste, and heated according to a specific reflow temperature curve to melt the solder paste. After the alloy components are cooled and solidified, a solder joint is formed between the chip capacitor and the PCB to achieve connection.

[0050] The present invention also provides a method for setting the phase of a power divider, which is applied to a coreless power divider. The coreless power divider includes: an input end, an external load end, a first output end, a second output end, a first coil, a second coil, a first capacitor and a second capacitor, wherein Figure 4 As shown, the method includes:

[0051] Step S401: Obtain the preset number of winding coils and the preset area according to the set phase value of the coreless power divider, the corresponding relationship between the set phase value and the preset number of winding coils, and the preset area of ​​the limiting cavity.

[0052] Step S402: Winding the two coils with a preset number of turns to form a first coil and a second coil having a hollow limiting cavity, respectively, and setting the cross-sectional area of ​​the limiting cavity to a preset area.

[0053] Step S403: Connect the first coil between the input terminal and the first output terminal.

[0054] Step S404: Connect the second coil between the external load terminal and the second output terminal.

[0055] Step S405: connecting one end of the first capacitor between the first output terminal and the first coil, and the other end of the first capacitor between the second coil and the second output terminal.

[0056] Step S406: Connect one end of the second capacitor between the input terminal and the first coil, and the other end of the second capacitor between the second coil and the external load terminal.

[0057] Specifically, the first coil and the second coil of the power divider are designed as coils with adjustable number of turns, so that technicians can adjust the number of windings according to their needs when using the power divider to achieve different phases of the power divider.

[0058] Furthermore, based on the previous embodiment, the method also includes: selecting a non-magnetic limit block according to a preset area; placing the limit block in the limit cavity; winding the first coil and the second coil on the limit block. A non-magnetic limit block is set in the limit cavity, and the first coil and the second coil are wound on the limit block, so as to fix the first coil and the second coil to prevent the first coil and the second coil from loosening, thereby producing an anti-seismic effect. Specifically, the limit block can be set as a limit block with adjustable size. The technician can adjust the size of the limit block according to the demand for the phase value of the power divider, so that the number of windings of the first coil and the second coil changes accordingly, so that the power divider reaches the required phase.

[0059] The present invention also provides an electronic device, such as Figure 5 As shown, the electronic device 500 includes a signal input module 501, a grounding resistor 502, a first signal output module 504, a second signal output module 505 and the coreless power divider 503 mentioned in the above embodiment.

[0060] The signal input module 501 is connected to the input terminal P1 of the coreless power divider 503, the first signal output module 504 is connected to the first output terminal P3 of the coreless power divider, the second signal output module 505 is connected to the second output terminal P4 of the coreless power divider, and the grounding resistor 502 is connected to the external load terminal P2 of the coreless power divider.

[0061] The coreless power divider and phase realization method provided by the present invention can make the phase value of the power divider no longer limited to 0° or 180°, and can realize a power divider with an arbitrarily set phase, meeting the current demand for power dividers with multiple phases.

[0062] The terms and expressions used in the present specification are for illustration only and are not intended to be limiting. It should be understood by those skilled in the art that various changes may be made to the details of the above embodiments without departing from the basic principles of the disclosed embodiments. Therefore, the scope of the present invention is determined solely by the claims, in which, unless otherwise indicated, all terms should be understood in the broadest reasonable sense.

Claims

1. A coreless power divider, characterized in that: include: An input terminal, a first output terminal, a second output terminal, an external load terminal, a first coil, a second coil, a first capacitor and a second capacitor, wherein: The first coil is connected between the input end and the first output end; The second coil is connected between the external load terminal and the second output terminal; The first capacitor has one end connected between the first output end and the first coil, and the other end connected between the second coil and the second output end; The second capacitor has one end connected between the input terminal and the first coil, and the other end connected between the second coil and the external load terminal; The first coil and the second coil are coils with a preset number of windings, a hollow limiting cavity is formed between the first coil and the second coil, the coil surrounds the limiting cavity, and the cross-sectional area of ​​the limiting cavity is a preset area, wherein: The preset number of winding coils and the preset area have a preset corresponding relationship, so that the coreless power divider has a set phase value; It also includes: a non-magnetic limiting block, which is located in the limiting cavity, and the first coil and the second coil are wound around the limiting block; The limit block is a plastic limit block; The limit block is bonded to the PCB board by epoxy resin glue.

2. The coreless power divider according to claim 1, characterized in that: The set phase value is 90°.

3. The coreless power divider according to claim 1, characterized in that: The limiting block is columnar and has two parallel through holes in the middle, and the first coil and the second coil are wound in the through holes.

4. The coreless power divider according to claim 1, characterized in that: The limiting block is in an I-shape, and the first coil and the second coil are wound around the middle of the I-shaped limiting block.

5. The coreless power divider according to claim 1, characterized in that: The first capacitor and the second capacitor are chip capacitors and are soldered on the PCB board.

6. An electronic device, characterized in that: The electronic device comprises: a signal input module, A first signal output module, a second signal output module, a grounding resistor, and a coreless power divider as claimed in any one of claims 1 to 5; Among them, the signal input module is connected to the input end of the coreless power divider, the first signal output module is connected to the first output end of the coreless power divider, the second signal output module is connected to the second output end of the coreless power divider, and the grounding resistor is connected to the external load end of the coreless power divider.

7. A method for setting the phase of a power divider, characterized in that: Applicable to the coreless power divider as described in any one of claims 1 to 5.

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