Radio frequency coupler and electronic equipment

Abstract

The utility model relates to the technical field of couplers, and provides a radio frequency coupler and an electronic device, the radio frequency coupler comprises a main signal line and a coupling signal line which are coupled in parallel; the main signal line comprises a first input end and a first output end, and an inductor is connected to the position, close to the first output end, of the main signal line. One end of the inductor is connected with the first input end, and the other end is connected with the first output end; the coupling signal line comprises a second input end and a second output end, and the second input end is close to the inductor; a first resistor is connected to one side, located at the second input end, of the coupling signal line; an electronic load and a capacitor are sequentially connected to the other side of the second input end on the coupling signal line; one end of the capacitor is connected with the electronic load, and the other end is connected with the second output end; therefore, the CPU can accurately control the intensity of wireless signal output power through the radio frequency coupler, and the cost of production design, development, manufacturing and the like is effectively reduced while the remarkable performance effect of the radio frequency coupler is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of couplers, and more specifically, to a radio frequency coupler and electronic equipment. Background Art

[0002] In the existing technology, the current coupling is designed with integrated circuits and sealed and tested into an integrated component through special materials. Although this existing coupler is easy to use, it is expensive after being made into a component, and adds 0.2 to 0.4dB of insertion loss to the RF line; in the context of increasingly fierce market competition, adding an integrated coupler component to each RF link will undoubtedly increase the cost of the entire product, which will cause considerable pressure on manufacturers in terms of production design, development, and manufacturing, and will inevitably affect the production quality of the product, thereby affecting the price competitiveness and quality competitiveness of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a radio frequency coupler and an electronic device in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] On the one hand, the utility model provides a radio frequency coupler, comprising a main signal line and a coupled signal line coupled in parallel; the main signal line comprises a first input terminal and a first output terminal, and an inductor is connected to the main signal line near the first output terminal; one end of the inductor is connected to the first input terminal, and the other end is connected to the first output terminal; the coupled signal line comprises a second input terminal and a second output terminal, and the second input terminal is close to the inductor; a first resistor is connected to one side of the second input terminal of the coupled signal line; an electronic load and a capacitor are sequentially connected to the other side of the second input terminal of the coupled signal line; one end of the capacitor is connected to the electronic load, and the other end is connected to the second output terminal.

[0006] In some embodiments, the main signal line includes a first horizontal line segment; one end of the first horizontal line segment is connected to the first input end, and the other end is connected to the first output end; the inductor is connected to the first horizontal line segment and close to the first output end.

[0007] In some embodiments, the coupled signal line includes a second horizontal line segment, a third horizontal line segment, a fourth horizontal line segment, a first vertical line segment and a second vertical line segment; the second horizontal line segment is parallel to the first horizontal line segment, and the two ends of the second horizontal line segment are correspondingly connected to one end of the first vertical line segment and the second vertical line segment; the other end of the first vertical line segment is connected to one end of the third horizontal line segment, and the other end of the third horizontal line segment is connected to the second output terminal; the other end of the second vertical line segment is connected to the fourth horizontal line segment, and the other end of the fourth horizontal line segment is connected to the ground terminal; the ends of the second horizontal line segment and the second vertical line segment that are connected to each other are both connected to the second input terminal; the first resistor is connected to the second vertical line segment, and the electronic load and the capacitor are connected to the third horizontal line segment in sequence.

[0008] In some embodiments, the electronic load is composed of a second resistor, a third resistor and a fourth resistor; one end of the second resistor is respectively connected to the second input terminal and one end of the third resistor, and the other end of the second resistor is respectively connected to one end of the fourth resistor and one end of the capacitor; the other ends of the third resistor and the fourth resistor are both grounded.

[0009] In some embodiments, the main signal line and the coupled signal line are both microstrip lines.

[0010] In some embodiments, the main signal line and the coupled signal line are both strip lines.

[0011] In some embodiments, the coupling signal line has a line length of 195 mil and a line width of 7.4 mil.

[0012] In some embodiments, the resistance of the first resistor is 49.9Ω; the inductance of the inductor is 0.6nH; and the capacitance of the capacitor is 15pF.

[0013] In some embodiments, the resistance of the second resistor is 43Ω; the resistance of the third resistor and the fourth resistor are both 150Ω.

[0014] On the other hand, the utility model further provides an electronic device, comprising any one of the above-mentioned radio frequency couplers.

[0015] The beneficial effect of the utility model is that, different from the prior art, the RF coupler of the utility model couples a small part of the RF signal input into the main signal line to the second input terminal and the second output terminal through a coupling signal line; one end of the second input terminal is connected to a matching load of a first resistor to match the line impedance to the impedance required by the circuit; the other end of the second input terminal uses a second resistor, a third resistor and a fourth resistor to form an electronic load; the signal after passing through the electronic load is fed back to the CPU through the capacitor through the second output terminal; the CPU can accurately control the intensity of the wireless signal output power through the RF coupler, while ensuring its significant performance effect, it can effectively reduce the production design, development, manufacturing and other costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a radio frequency coupler in an embodiment of the utility model;

[0017] The names and numbers of the marks in the figure are: first input terminal-1; first output terminal-2; second input terminal-3; second output terminal-4; electronic load-10; first horizontal line segment-11; second horizontal line segment-12; third horizontal line segment-13; fourth horizontal line segment-14; first vertical line segment-15; second vertical line segment-16. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the utility model, rather than all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technical workers in this field without creative labor belong to the protection scope of the utility model. In addition, the directional terms mentioned in the utility model, such as "one end", "the other end", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the utility model, rather than indicating or implying the orientation that the utility model must have, and therefore cannot be understood as limitations on the utility model.

[0019] The utility model is implemented as follows Figure 1 As shown in, a radio frequency coupler includes a main signal line and a coupled signal line coupled in parallel; the main signal line includes a first input terminal 1 and a first output terminal 2, and an inductor L1 is connected to the main signal line near the first output terminal 2; one end of the inductor L1 is connected to the first input terminal 1, and the other end is connected to the first output terminal 2; the coupled signal line includes a second input terminal 3 and a second output terminal 4, and the second input terminal 3 is close to the inductor L1; a first resistor R1 is connected to one side of the second input terminal 3 of the coupled signal line; an electronic load 10 and a capacitor C1 are connected in sequence on the other side of the second input terminal 3 of the coupled signal line; one end of the capacitor C1 is connected to the electronic load 10, and the other end is connected to the second output terminal 4.

[0020] Specifically, the main signal line includes a first horizontal line segment 11; one end of the first horizontal line segment 11 is connected to the first input terminal 1, and the other end is connected to the first output terminal 2; the inductor L1 is connected to the first horizontal line segment 11 and is close to the first output terminal 2. The inductance value of the inductor L1 is 0.6nH. The main signal line is a microstrip line.

[0021] Specifically, the coupling signal line includes a second horizontal line segment 12, a third horizontal line segment 13, a fourth horizontal line segment 14, a first vertical line segment 15, and a second vertical line segment 16; the second horizontal line segment 12 is parallel to the first horizontal line segment 11, and the two ends of the second horizontal line segment 12 are connected to one end of the first vertical line segment 15 and the second vertical line segment 16; the other end of the first vertical line segment 15 is connected to one end of the third horizontal line segment 13, and the other end of the third horizontal line segment 13 is connected to the second output terminal 4; the other end of the second vertical line segment 16 is connected to the fourth horizontal line segment 14, and the other end of the fourth horizontal line segment 14 is connected to the ground terminal; the ends of the second horizontal line segment 12 and the second vertical line segment 16 connected to each other are both connected to the second input terminal 3; the first resistor R1 is connected to the second vertical line segment 16, and the electronic load 10 and the capacitor C1 are connected to the third horizontal line segment 13 in sequence. Among them, the resistance value of the first resistor R1 is 49.9Ω. The capacitance value of the capacitor C1 is 15pF. The coupling signal line is a microstrip line, and the line length of the microstrip line is 195 mil and the line width is 7.4 mil. In this embodiment, the second output terminal 4 is used to connect to the detection pin of the CPU.

[0022] Specifically, the electronic load 10 is composed of a second resistor R2, a third resistor R3 and a fourth resistor R4; one end of the second resistor R2 is connected to the second input terminal 3 and one end of the third resistor R3 respectively, and the other end of the second resistor R2 is connected to one end of the fourth resistor R4 and one end of the capacitor C1 respectively; the other ends of the third resistor R3 and the fourth resistor R4 are both grounded. The resistance value of the second resistor is 43Ω; the resistance values ​​of the third resistor and the fourth resistor are both 150Ω.

[0023] In some other embodiments, both the main signal line and the coupled signal line are strip lines.

[0024] The working principle is: when the RF signal is input from the first input terminal 1, most of the signal will be directly output from the first output terminal 2, and a small part of the signal will be coupled to the second input terminal 3 and the second output terminal 4 through the coupling signal line; one end of the second input terminal 3 is connected to the matching load of the first resistor R1 to match the line impedance to the impedance required by the circuit. The other end of the second input terminal 3 uses the second resistor R2, the third resistor R3 and the fourth resistor R4 to form an electronic load 10. The signal after passing through the electronic load 10 is fed back to the detection pin of the CPU through the capacitor C1 and the second output terminal 4. The CPU can accurately control the intensity of the wireless signal output power through the RF coupler. The coupling degree of the RF coupler can reach 20dB, the application cost is low, and the performance is also good.

[0025] In other embodiments, the utility model further provides an electronic device, which includes the above-mentioned radio frequency coupler, and reduces the costs of production design, development, and manufacturing while ensuring its significant performance effect.

[0026] It should be understood that ordinary technical workers in the field can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A radio frequency coupler, characterized in that: It comprises a main signal line and a coupled signal line coupled in parallel; the main signal line comprises a first input terminal and a first output terminal, an inductor is connected to the main signal line near the first output terminal; one end of the inductor is connected to the first input terminal, and the other end is connected to the first output terminal; the coupled signal line comprises a second input terminal and a second output terminal, and the second input terminal is close to the inductor; a first resistor is connected to one side of the second input terminal of the coupled signal line; an electronic load and a capacitor are sequentially connected to the other side of the second input terminal of the coupled signal line; one end of the capacitor is connected to the electronic load, and the other end is connected to the second output terminal.

2. The radio frequency coupler according to claim 1, characterized in that: The main signal line includes a first horizontal line segment; one end of the first horizontal line segment is connected to the first input end, and the other end is connected to the first output end; the inductor is connected to the first horizontal line segment and is close to the first output end.

3. The radio frequency coupler according to claim 2, characterized in that: The coupled signal line includes a second horizontal line segment, a third horizontal line segment, a fourth horizontal line segment, a first vertical line segment and a second vertical line segment; the second horizontal line segment is parallel to the first horizontal line segment, and the two ends of the second horizontal line segment are correspondingly connected to one end of the first vertical line segment and the second vertical line segment; the other end of the first vertical line segment is connected to one end of the third horizontal line segment, and the other end of the third horizontal line segment is connected to the second output terminal; the other end of the second vertical line segment is connected to the fourth horizontal line segment, and the other end of the fourth horizontal line segment is connected to the ground terminal; the ends of the second horizontal line segment and the second vertical line segment that are connected to each other are both connected to the second input terminal; the first resistor is connected to the second vertical line segment, and the electronic load and the capacitor are connected to the third horizontal line segment in sequence.

4. The radio frequency coupler according to claim 3, characterized in that: The electronic load consists of a second resistor, a third resistor and a fourth resistor; one end of the second resistor is respectively connected to the second input end and one end of the third resistor, and the other end of the second resistor is respectively connected to one end of the fourth resistor and one end of the capacitor; the other ends of the third resistor and the fourth resistor are both grounded.

5. The radio frequency coupler according to claim 1, characterized in that: The main signal line and the coupled signal line are both microstrip lines.

6. The radio frequency coupler according to claim 1, characterized in that: The main signal line and the coupling signal line are both strip lines.

7. The radio frequency coupler according to claim 5 or 6, characterized in that: The coupling signal line has a length of 195 mil and a width of 7.4 mil.

8. The radio frequency coupler according to any one of claims 1 to 6, characterized in that: The resistance value of the first resistor is 49.9Ω; the inductance value of the inductor is 0.6nH; and the capacitance value of the capacitor is 15pF.

9. The radio frequency coupler according to claim 4, characterized in that: The resistance value of the second resistor is 43Ω; the resistance values ​​of the third resistor and the fourth resistor are both 150Ω.

10. An electronic device, characterized in that: Comprising the radio frequency coupler according to any one of claims 1 to 9.

Images