Broadband adjustable coupler, 5G communication device and 5G communication system

Abstract

The present invention discloses a broadband adjustable coupler, a 5G communication device and a 5G communication system. The broadband adjustable coupler adopts a parallel coupling line structure, which greatly reduces the circuit area. Compared with the traditional board-level circuit structure, it is easier to integrate into the substrate, so it is easier to integrate with the communication chip. At the same time, the broadband adjustable coupler has broadband adjustable characteristics and can be widely used in broadband systems. In addition, the broadband adjustable coupler can achieve a broadband high-flatness phase difference response through a high-pass structure composed of a first capacitor and a first parallel coupling line and a low-pass structure composed of a second capacitor and a second parallel coupling line to ensure a smaller orthogonal signal phase error. The broadband adjustable coupler can be widely used in 5G communication technology to assist the control system in adjusting and controlling the output power of the chip.

Description

Technical Field

[0001] The present invention relates to the field of electronic communication technology, and in particular to a broadband adjustable coupler, a 5G communication device and a 5G communication system. Background Art

[0002] In 5G communication systems, the chip output power needs to be adjusted and controlled. A coupler is needed to sample the output power amplitude and feed it back to the control system to correct the output power amplitude. Traditional board-level circuits generally use branch line couplers equipped with varactor diodes to sample the output power. Figure 1 Shown is a schematic diagram of the circuit principle of a traditional branch line coupler. As shown in the figure, the traditional branch line coupler uses a board-level circuit, which has a large area and is difficult to integrate with a communication chip, resulting in signal feedback errors and dynamic response. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The main purpose of the present invention is to provide a broadband adjustable coupler, a 5G communication device and a 5G communication system to solve the problem that the existing branch line coupler adopts a board-level circuit, has a large area and is difficult to integrate with a communication chip.

[0005] (II) Technical solution

[0006] The present invention is achieved through the following technical solutions:

[0007] A broadband adjustable coupler comprises a substrate, on which a first parallel coupling line, a second parallel coupling line, a first variable capacitance diode, a second variable capacitance diode, a first capacitor and a second capacitor are integrated;

[0008] The first parallel coupling line includes a first microstrip line and a second microstrip line parallel to each other, a first end of the first microstrip line and a first end of the second microstrip line are connected to each other and to one end of the first capacitor, a second end of the first microstrip line is connected to the anode of the first varactor diode, and a second end of the second microstrip line is connected to the anode of the second varactor diode;

[0009] The second parallel coupling line includes a third microstrip line and a fourth microstrip line which are parallel to each other, wherein a first end of the third microstrip line is connected to a first end of the fourth microstrip line, a second end of the third microstrip line is connected to a cathode of the first varactor diode and one end of the second capacitor, and a second end of the fourth microstrip line is connected to a cathode of the second varactor diode and the other end of the second capacitor.

[0010] Furthermore, the first parallel coupling lines and the second parallel coupling lines have a plurality of bends.

[0011] Furthermore, the substrate is a silicon substrate.

[0012] A 5G communication device comprises any broadband adjustable coupler as described above.

[0013] A 5G communication system comprises the 5G communication device as described above.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the broadband adjustable coupler provided by the present invention adopts a parallel coupling line structure, which greatly reduces the circuit area and is easier to integrate into a substrate than a traditional board-level circuit structure, thereby making it easier to integrate with a communication chip. At the same time, the broadband adjustable coupler has broadband adjustable characteristics and can be widely used in broadband systems. In addition, the broadband adjustable coupler can achieve a broadband high-flatness phase difference response through a high-pass structure composed of a first capacitor and a first parallel coupling line and a low-pass structure composed of a second capacitor and a second parallel coupling line to ensure a smaller orthogonal signal phase error. The broadband adjustable coupler can be widely used in 5G communication technology to assist the control system in adjusting and controlling the output power of the chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the circuit principle of a traditional branch line coupler;

[0017] Figure 2 It is a schematic diagram of the circuit principle of a broadband adjustable coupler provided in an embodiment of the present invention.

[0018] Figure 3 is a centimeter ratio test curve of a broadband adjustable coupler provided by an embodiment of the present invention;

[0019] Figure 4 is a return loss test curve of a broadband adjustable coupler provided by an embodiment of the present invention;

[0020] Figure 5 This is a phase difference test curve of the broadband adjustable coupler provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings.

[0022] The broadband adjustable coupler provided in the embodiment of the present invention includes a substrate. Figure 2 As shown, a first parallel coupling line 1, a second parallel coupling line 2, a first varactor diode D1, a second varactor diode D2, a first capacitor C1 and a second capacitor C2 are integrated on the substrate.

[0023] The first parallel coupling line 1 includes a first microstrip line 11 and a second microstrip line 12 which are parallel to each other. A first end 111 of the first microstrip line 11 and a first end 121 of the second microstrip line 12 are connected to each other and to one end of the first capacitor C1. A second end 112 of the first microstrip line 11 is connected to the anode of the first varactor diode D1. A second end 122 of the second microstrip line 12 is connected to the anode of the second varactor diode D2.

[0024] The second parallel coupling line 2 includes a third microstrip line 21 and a fourth microstrip line 22 which are parallel to each other, the first end 211 of the third microstrip line 21 and the first end 221 of the fourth microstrip line 22 are connected to each other, the second end 212 of the third microstrip line 21 is connected to the cathode of the first varactor diode D1 and one end of the second capacitor C2, and the second end 222 of the fourth microstrip line 22 is connected to the cathode of the second varactor diode D2 and the other end of the second capacitor C2.

[0025] In the coupler, the input end of the coupler is led out from the second end 112 of the first microstrip line 11, the coupling end of the coupler is led out from the second end 212 of the third microstrip line 21, the isolation end of the coupler is led out from the second end 122 of the second microstrip line 12, and the output end of the coupler is led out from the second end 222 of the fourth microstrip line 22. The first microstrip line 11 and the second microstrip line 12 are parallel in a plane, and the spacing is less than one-quarter of their wavelengths. The third microstrip line 21 and the fourth microstrip line 22 are also parallel in the plane, and the spacing is less than one-quarter of their wavelengths. The parallel coupled line architecture formed supports common-mode and differential-mode signal transmission. Among them, the first capacitor C1 is connected in series with the first parallel coupled line 1 to form a high-pass structure, the second capacitor C2 is connected in parallel with the second parallel coupled line 2 to form a low-pass structure, and the first varactor diode D1 and the second varactor diode D2 independently adjust the output power distribution ratio of the coupler. According to Figure 3 , 4 From the test curves of the centimeter ratio, return loss and phase difference of the broadband adjustable coupler in 5, it can be seen that the broadband adjustable coupler can achieve a broadband high-flatness phase difference response and ensure a small orthogonal signal phase error.

[0026] In the coupler, according to actual needs, the first parallel coupling line 1 and the second parallel coupling line 2 may have a plurality of bends, so as to further reduce the circuit area. The substrate of the coupler may be a silicon substrate, and the first parallel coupling line 1, the second parallel coupling line 2, the first variable capacitance diode D1, the second variable capacitance diode D2, the first capacitor C1 and the second capacitor C2 are prepared on the silicon substrate.

[0027] The broadband adjustable coupler can be widely used in 5G communication to assist the control system in adjusting and controlling the output power of the chip. The broadband adjustable coupler can be applied to a 5G communication device to obtain a 5G communication device including the broadband adjustable coupler, and the 5G communication device can be applied to a 5G communication system to obtain a 5G communication system including the 5G communication device.

[0028] The above embodiments are only preferred embodiments and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A broadband adjustable coupler, comprising a substrate, characterized in that: The substrate is integrated with a first parallel coupling line, a second parallel coupling line, a first variable capacitance diode, a second variable capacitance diode, a first capacitor and a second capacitor; The first parallel coupling line includes a first microstrip line and a second microstrip line parallel to each other, a first end of the first microstrip line and a first end of the second microstrip line are connected to each other and to one end of the first capacitor, the other end of the first capacitor is grounded to form a loop, a second end of the first microstrip line is connected to the anode of the first varactor diode, and a second end of the second microstrip line is connected to the anode of the second varactor diode; The second parallel coupling line includes a third microstrip line and a fourth microstrip line which are parallel to each other, wherein a first end of the third microstrip line and a first end of the fourth microstrip line are connected to each other and grounded to form a loop, a second end of the third microstrip line is connected to a cathode of the first varactor diode and one end of the second capacitor, and a second end of the fourth microstrip line is connected to a cathode of the second varactor diode and the other end of the second capacitor.

2. The broadband adjustable coupler according to claim 1, characterized in that: The first parallel coupling lines and the second parallel coupling lines have a plurality of bends.

3. The broadband adjustable coupler according to claim 1, characterized in that: The substrate is a silicon substrate.

4. A 5G communication device, characterized in that: The invention comprises a broadband adjustable coupler as claimed in any one of claims 1 to 3.

5. A 5G communication system, characterized in that: Including the 5G communication device as described in claim 4.

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