Power divider

Abstract

The power divider comprises an input end, a first output end, a second output end, a first phase adjusting part, a second phase adjusting part and a matching part, the first phase adjusting part is connected between the input end and the first output end in series and used for adjusting the phase of a first output signal output by the first output end, and the second phase adjusting part is used for adjusting the phase of a second output signal output by the second output end. The second phase adjusting part is connected in series between the input end and the second output end and is used for adjusting the phase of a second output signal output by the second output end; the matching part is connected in series between the first output end and the second output end and is used for matching the first output end and the second output end; the phase difference between the first output signal and the second output signal is 180 degrees, a phase shifter does not need to be additionally connected, the structure is relatively simple, the area of a printed circuit board is reduced, and the requirement for miniaturization of equipment is met.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave transmission, in particular to a power divider. Background Art

[0002] A power divider is a device that splits the power of an input signal into two or more outputs, or conversely, combines the power of multiple signals into a single output. Power dividers with a 180-degree phase difference in output are widely used in power combining and antenna feeding. Common power dividers include 3dB bridge couplers, branch line bridge couplers, ring bridge couplers, and Wilkinson power dividers. The most commonly used power divider is the Wilkinson power divider. To achieve a 180-degree phase difference between the two output ends of a Wilkinson power divider, an external phase shifter is required, which consumes a large amount of PCB area and does not meet the requirements of device miniaturization. Summary of the Invention

[0003] In view of this, it is necessary to provide a power divider that reduces the area of the printed circuit board and meets the requirement of miniaturization.

[0004] One embodiment of the present invention provides a power divider, comprising: an input end, a first output end, a second output end, a first phase adjustment unit, a second phase adjustment unit and a matching unit, wherein the first phase adjustment unit is connected in series between the input end and the first output end, for adjusting the phase of a first output signal output by the first output end; the second phase adjustment unit is connected in series between the input end and the second output end, for adjusting the phase of a second output signal output by the second output end; the matching unit is connected in series between the first output end and the second output end, for matching the first output end with the second output end; the phase difference between the first output signal and the second output signal is 180 degrees.

[0005] Preferably, the first phase adjustment unit includes: a first transmission line electrically connected between the input end and the first output end, and configured to adjust the phase of the first output signal so that the first output signal has a phase of -90 degrees.

[0006] Preferably, the second phase adjustment unit adjusts the phase of the second output signal so that the second output signal has a phase of +90 degrees, and the second phase adjustment unit includes: a second transmission line, one end of which is electrically connected to the second output end and the other end is grounded; a first capacitor, one end of which is electrically connected to one end of the second transmission line and the other end is electrically connected to the input end; and a third transmission line, one end of which is electrically connected to the other end of the first capacitor and the other end is grounded.

[0007] Preferably, the matching section includes: a fourth transmission line, one end of which is electrically connected to the second output end; a first inductor, one end of which is electrically connected to the other end of the fourth transmission line, and the other end of which is electrically connected to the first output end; a first stub, one end of which is electrically connected to the common end of the fourth transmission line and the first inductor, and the other end of which is suspended; and a second stub, one end of which is electrically connected to the other end of the first inductor, and the other end of which is suspended.

[0008] Preferably, the matching degree between the first output terminal and the second output terminal is adjusted by adjusting the inductance value of the first inductor.

[0009] Preferably, a first resistor is further included, one end of the first resistor is electrically connected to the other end of the first inductor, and the other end is electrically connected to the first output end, for adjusting the isolation between the first output end and the second output end.

[0010] Preferably, the power divider is integrated on a printed circuit board; the input end, the first output end, the second output end, the first phase adjustment part, the second phase adjustment part and the matching part are arranged on the first surface of the printed circuit board, and the second surface of the printed circuit board is a ground plane.

[0011] Preferably, the first output end and the second output end are perpendicular to each other; the input end is parallel to the first output end and perpendicular to the second output end; the first transmission line is in a P-shape, with one end perpendicularly connected to the first output end and the other end perpendicularly connected to the input end.

[0012] Preferably, the second transmission line is in a ┙ shape, one end of which is vertically connected to the second output end, and the other end of which is connected to the ground plane through a first via; the third transmission line is in a ┎ shape, one end of which is connected to the other end of the first capacitor, and the other end of which is connected to the ground plane through a second via, and the second transmission line and the third transmission line form a semi-enclosed storage space.

[0013] Preferably, the matching portion is arranged in the storage space; the fourth transmission line is bent, one end of which is vertically connected to the second transmission line, and the other end is connected to one end of the first inductor; the first stub is in a ┙ shape, one end of which is connected to the common end of the fourth transmission line and the first inductor, and the other end is suspended; the second stub is in a ┎ shape, one end of which is electrically connected to the other end of the first inductor, and the other end is suspended.

[0014] Compared with the prior art, the power divider provided in the embodiment of the present invention is provided with a first phase adjustment unit between the input end and the first output end to adjust the phase of the first output signal output by the first output end, and a second phase adjustment unit is provided between the input end and the second output end to adjust the phase of the second output signal output by the second output end, so that the phase difference between the first output signal and the second output signal is 180 degrees. There is no need to additionally connect a phase shifter, the structure is relatively simple, the area of the printed circuit board is reduced, and the requirements of miniaturization are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of a circuit model of an embodiment of the power divider of the present invention.

[0016] Figure 2 Schematic diagram of S-parameter simulation of an embodiment of the power divider of the present invention.

[0017] Figure 3 Schematic diagram of phase curves of the first output signal and the second output signal of an embodiment of the power divider of the present invention.

[0018] Figure 4 It is a structural schematic diagram of a specific embodiment of the power divider of the present invention.

[0019] Figure 5 The figure is a schematic diagram of a curve showing the output power difference between the first output end and the second output end of a specific embodiment of the power divider of the present invention.

[0020] Figure 6 Schematic diagram of a curve showing the phase difference between the first output signal and the second output signal of a specific embodiment of the power divider of the present invention.

[0021] Description of main component symbols

[0022] 1-Power divider

[0023] 2-Printed Circuit Board

[0024] P1-Input terminal

[0025] P2-first output terminal

[0026] P3-second output terminal

[0027] 10-First phase adjustment unit

[0028] 20-Second phase adjustment unit

[0029] 30-Matching Department

[0030] L1~L4-first transmission line~fourth transmission line

[0031] L5-first stump

[0032] L6-Second segment

[0033] C1-first capacitor

[0034] R1 - first resistor

[0035] Lr1-first inductor

[0036] H1-first via

[0037] H2-Second via

[0038] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0040] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] See also Figure 1 As shown, Figure 1 The figure is a schematic diagram of a circuit model of an embodiment of the power divider 1 of the present invention. In this embodiment, the power divider 1 can be applied to antenna arrays, balanced power amplifiers, mixers and phase shifters. The power divider 1 divides the input signal into two signals with a phase difference of 180 degrees. Specifically, Figure 1As shown, the power divider 1 includes an input terminal P1, a first output terminal P2, a second output terminal P3, a first phase adjustment unit 10, a second phase adjustment unit 20, and a matching unit 30. The first phase adjustment unit 10 is connected in series between the input terminal P1 and the first output terminal P2, and is used to adjust the phase of the first output signal output by the first output terminal P2 so that the first output signal has a phase of -90 degrees. The second phase adjustment unit 20 is connected in series between the input terminal P1 and the second output terminal P3, and is used to adjust the phase of the second output signal output by the second output terminal P3 so that the second output signal has a phase of +90 degrees. The first phase adjustment unit 10 and the second phase adjustment unit 20 adjust the phases of the first output signal and the second output signal so that the phase difference between the first output signal and the second output signal is 180 degrees. The matching unit 30 is connected in series between the first output terminal P2 and the second output terminal P3, and is used to match the first output terminal P2 with the second output terminal P3.

[0042] In this embodiment, the first phase adjustment unit 10 includes a first transmission line L1. The first transmission line L1 is electrically connected between the input terminal P1 and the first output terminal P2. The phase of the first output signal is adjusted via the first transmission line L1 so that the first output signal has a phase of -90 degrees. The second phase adjustment unit 20 adjusts the phase of the second output signal so that the second output signal has a phase of +90 degrees. Specifically, the second phase adjustment unit 20 includes: a second transmission line L2, a first capacitor C1, and a third transmission line L3. One end of the second transmission line L2 is electrically connected to the second output terminal P3, and the other end is grounded. One end of the first capacitor C1 is electrically connected to one end of the second transmission line L2, and the other end is electrically connected to the input terminal P1. One end of the third transmission line L3 is electrically connected to the other end of the first capacitor C1, and the other end of the third transmission line L3 is grounded.

[0043] In this embodiment, the matching unit 30 includes a fourth transmission line L4, a first inductor Lr1, a first stub L5, and a second stub L6. One end of the fourth transmission line L4 is electrically connected to the second output terminal P3. One end of the first inductor Lr1 is electrically connected to the other end of the fourth transmission line L4, and the other end of the first inductor Lr1 is electrically connected to the first output terminal P2. One end of the first stub L5 is electrically connected to the common end of the fourth transmission line L4 and the first inductor Lr1, while the other end of the first stub L5 is left floating. One end of the second stub L6 is electrically connected to the other end of the first inductor Lr1, while the other end of the second stub L6 is left floating. The matching degree between the first output terminal P2 and the second output terminal P3 is adjusted by adjusting the inductance of the first inductor Lr1.

[0044] In this embodiment, the power divider 1 further includes a first resistor R1. One end of the first resistor R1 is electrically connected to the other end of the first inductor Lr1, and the other end is electrically connected to the first output terminal P2. The first resistor R1 is used to adjust the isolation between the first output terminal P2 and the second output terminal P3.

[0045] See also Figure 2 As shown, Figure 2 FIG. 1 is a schematic diagram of an S parameter simulation of an embodiment of a power divider 1 of the present invention. Figure 2 As shown, according to the S21 and S31 parameter curves, when the power divider 1 operates at a frequency of 6 GHz, the first output terminal P2 and the second output terminal P3 can obtain a better half-power distribution. According to the S11, S22 and S33 parameter curves, the reflection coefficients of the input terminal P1, the first output terminal P2 and the second output terminal P3 are all above 15 dB. According to the S32 parameter curve, the isolation between the first output terminal P2 and the second output terminal P3 reaches more than 20 dB.

[0046] See also Figure 3 As shown, Figure 3 Schematic diagram of the phase curve of the first output signal and the second output signal of the power divider 1 of the present invention. Figure 3 As shown, at a frequency of 5.52 GHz, the phase of the first output signal is -93.2 degrees, and at a frequency of 5.51 GHz, the phase of the second output signal is +89.3 degrees. The phase difference between the first output signal and the second output signal is approximately 180 degrees, which meets the phase difference requirement between the output ports.

[0047] See also Figure 4 As shown, Figure 4 The figure is a schematic diagram of the structure of a specific embodiment of a power divider according to the present invention. In this embodiment, the power divider 1 is integrated on a printed circuit board 2. The printed circuit board 2 includes a first surface and a second surface. The input terminal P1, the first output terminal P2, the second output terminal P3, the first phase adjustment unit 10, the second phase adjustment unit 20, and the matching unit 30 are arranged on the first surface of the printed circuit board 2. The second surface of the printed circuit board 2 is a ground plane.

[0048] In this embodiment, the first output terminal P2 and the second output terminal P3 are perpendicular to each other. The input terminal P1 is parallel to the first output terminal P2 and perpendicular to the second output terminal P3. The first transmission line L1 is in the shape of a letter "П", with one end perpendicularly connected to the first output terminal P2 and the other end perpendicularly connected to the input terminal P1. The second transmission line L2 is in the shape of a letter "┙", with one end perpendicularly connected to the second output terminal P3 and the other end connected to the ground plane through a first via H1. The third transmission line L3 is in the shape of a letter "┎", with one end connected to the other end of the first capacitor C1 and the other end connected to the ground plane through a second via H2. The second transmission line L2 and the third transmission line L3 form a semi-enclosed storage space.

[0049] In this embodiment, the matching portion 30 is disposed in the storage space. Specifically, the fourth transmission line L4 is bent, with one end vertically connected to the second transmission line L2 and the other end connected to one end of the first inductor Lr1. The first stub L5 is in the shape of a Chinese character "┙", with one end connected to the common end of the fourth transmission line L4 and the first inductor Lr1, and the other end suspended. The second stub L6 is in the shape of a Chinese character "┎", with one end electrically connected to the other end of the first inductor Lr1, and the other end suspended. In this embodiment, the length of the power divider 1 is 5.06 mm and the width is 3.52 mm. In other embodiments, the length and width of the power divider 1 may be other values.

[0050] See also Figure 5 As shown, Figure 5 Schematic diagram of the output power difference curve of the first output terminal P2 and the second output terminal P3 of a specific embodiment of the power divider 1 of the present invention. Figure 5 As shown, within the operating frequency range of 4.5 GHz-8.2 GHz, the error between the output power of the first output terminal P2 and the second output terminal P3 is within ±2 dB.

[0051] See also Figure 6 As shown, Figure 6 FIG. 1 is a schematic diagram of a phase difference curve between the first output signal and the second output signal of a specific embodiment of the power divider 1 of the present invention. Figure 6 As shown, within the operating frequency range of 3.6 GHz-7.4 GHz, the phase difference between the first output signal and the second output signal is 180 degrees ± 10 degrees, which meets the phase difference requirement between the output ports.

[0052] Compared with the prior art, the power divider provided in the embodiment of the present invention is provided with a first phase adjustment unit between the input end and the first output end to adjust the phase of the first output signal output by the first output end, and a second phase adjustment unit is provided between the input end and the second output end to adjust the phase of the second output signal output by the second output end, so that the phase difference between the first output signal and the second output signal is 180 degrees. There is no need to additionally connect a phase shifter, the structure is relatively simple, the area of the printed circuit board is reduced, and the requirements of miniaturization of the equipment are met.

[0053] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. Any appropriate changes and modifications to the above embodiments fall within the scope of the present invention as long as they are within the spirit of the present invention.

Claims

1. A power distributor, characterized in that: It includes an input end, a first output end, a second output end, a first phase adjustment unit, a second phase adjustment unit and a matching unit, wherein: The first phase adjustment unit is connected in series between the input terminal and the first output terminal, and is used to adjust the phase of the first output signal output by the first output terminal; The second phase adjustment unit is connected in series between the input terminal and the second output terminal, and is used to adjust the phase of the second output signal output by the second output terminal; The matching unit is connected in series between the first output end and the second output end, and is used to match the first output end and the second output end; The phase difference between the first output signal and the second output signal is 180 degrees.

2. The power divider according to claim 1, wherein The first phase adjustment unit includes: The first transmission line is electrically connected between the input end and the first output end, and is used to adjust the phase of the first output signal so that the first output signal has a phase of -90 degrees.

3. The power divider according to claim 2, wherein: The second phase adjustment unit adjusts the phase of the second output signal so that the second output signal has a phase of +90 degrees, and the second phase adjustment unit includes: a second transmission line, one end of which is electrically connected to the second output terminal and the other end of which is grounded; a first capacitor, one end of which is electrically connected to one end of the second transmission line, and the other end of which is electrically connected to the input end; The third transmission line has one end electrically connected to the other end of the first capacitor and the other end grounded.

4. The power divider according to claim 3, wherein: The matching unit includes: a fourth transmission line, one end of which is electrically connected to the second output end; a first inductor, one end of which is electrically connected to the other end of the fourth transmission line, and the other end of which is electrically connected to the first output end; a first stub, one end of which is electrically connected to a common end of the fourth transmission line and the first inductor, and the other end of which is suspended; One end of the second stub is electrically connected to the other end of the first inductor, and the other end is suspended.

5. The power divider according to claim 4, wherein: The matching degree between the first output terminal and the second output terminal is adjusted by adjusting the inductance value of the first inductor.

6. The power divider according to claim 4, wherein: Also includes: A first resistor, one end of the first resistor is electrically connected to the other end of the first inductor, and the other end is electrically connected to the first output end, for adjusting the isolation between the first output end and the second output end.

7. The power divider according to claim 6, wherein: The power distributor is integrated on a printed circuit board; The input end, the first output end, the second output end, the first phase adjustment unit, the second phase adjustment unit, and the matching unit are disposed on a first surface of the printed circuit board, and a second surface of the printed circuit board is a ground plane.

8. The power divider according to claim 7, wherein: The first output end and the second output end are perpendicular to each other; The input end is parallel to the first output end and perpendicular to the second output end; The first transmission line is in a P-shape, with one end vertically connected to the first output end and the other end vertically connected to the input end.

9. The power divider according to claim 8, wherein: The second transmission line is in a ┙ shape, one end of which is vertically connected to the second output end, and the other end of which is connected to the ground plane through a first via hole; The third transmission line is in a V shape, one end of which is connected to the other end of the first capacitor, and the other end of which is connected to the ground plane through a second via hole. The second transmission line and the third transmission line form a semi-enclosed storage space.

10. The power divider according to claim 9, wherein: The matching portion is disposed in the storage space; The fourth transmission line is bent, one end of which is vertically connected to the second transmission line, and the other end of which is connected to one end of the first inductor; The first stub is in a ┙ shape, one end of which is connected to the common end of the fourth transmission line and the first inductor, and the other end is suspended; The second residual section is in a shape of a letter "┎", one end of which is electrically connected to the other end of the first inductor, and the other end of which is suspended.

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