Radio frequency circuit impedance regulator
By using an adjustment knob and slide rail structure within the package in the RF circuit, combined with a capacitor/inductor board and a GND board, the problems of large space, high cost and complex debugging in traditional RF circuit design are solved, and rapid impedance adjustment and efficient debugging are achieved.
Patent Information
- Application Number
- CN202520030334.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-07
AI Technical Summary
In traditional RF circuit design, the Π-type matching circuit occupies a large space, is costly, has a complex design, and low debugging efficiency.
The system employs an adjustment knob and slide rail structure within the package, combined with a capacitor/inductor board and a GND board. Impedance adjustment is achieved by changing the position of the capacitor/inductor board in the signal transmission circuit through the sliding adjustment knob. The QFN package and high-temperature resistant insulating dielectric filling simplify the design and debugging process.
It achieves a compact design for RF circuits, reduces PCB area and cost, improves debugging efficiency, simplifies operation procedures, and requires no power supply.
Smart Images
Figure CN223885171U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of radio frequency circuit, specifically relates to a radio frequency circuit impedance regulator. BACKGROUND
[0002] In the traditional radio frequency circuit design, in order to realize the impedance matching between radio frequency device and device or device and antenna, Π type matching circuit is usually adopted.This circuit needs to reserve three positions on transmission line, respectively for connecting inductance or capacitance, changes the impedance of transmission line by constantly replacing the elements in three positions, to realize impedance matching.This method can realize impedance matching, but there are many problems:
[0003] 1. Large space occupation, high cost: Π type matching circuit needs to reserve larger space to place inductance, capacitance and other elements, which will lead to the increase of the overall area of radio frequency circuit board, increase the difficulty of structure design and bare board cost.
[0004] 2. Complex design, low debugging efficiency: there are many Π type matching circuits on the radio frequency circuit board, so that the schematic design and PCB layout wiring become tedious.When debugging impedance, the elements in Π type matching circuit need to be replaced constantly, which is complex and inefficient. UTILITY MODEL CONTENTS
[0005] The utility model aims at solving the above problems and provides a radio frequency circuit impedance regulator to solve the problems of large space occupation, complex design and difficult debugging of traditional π type matching network.
[0006] The utility model realizes the above-mentioned purposes through the following technical schemes:
[0007] The utility model provides a radio frequency circuit impedance regulator, which comprises a packaging body, and the packaging body is provided with:
[0008] Adjusting knob and slide rail, which are slidingly connected;
[0009] Capacitance / inductance plate and GND plate, and the two sides of one capacitance / inductance plate are provided with GND plates in parallel;
[0010] Solder pad, the solder pad includes input solder pad, GND solder pad and output solder pad;
[0011] The input solder pad, the capacitance / inductance plate, the slide rail and the output solder pad are connected in series to form a signal transmission loop, and the GND solder pad is connected with the GND plate;
[0012] When the adjusting knob is slid, the position of the adjusting knob on the slide rail is changed to make the capacitance / inductance plate change the impedance of the signal transmission loop.
[0013] Further, the soldering pad adopts QFN package in the package body.
[0014] Further, the package body is filled with high-temperature-resistant insulating medium.
[0015] Further, the capacitor / inductor plate is arranged in an array form by a plurality of capacitor / inductor elements.
[0016] Further, the adjusting knob further comprises a sliding shaft arranged at the end of the adjusting knob, and the sliding shaft is slidably connected through the slide rail and the capacitor / inductor plate.
[0017] Further, the adjusting knob comprises a knob one, a knob two and a knob three, the capacitor / inductor plate comprises a capacitor / inductor plate one, a capacitor / inductor plate two and a capacitor / inductor plate three, and the slide rail comprises a slide rail one, a slide rail two and a slide rail three.
[0018] The input soldering pad is connected in series with the capacitor / inductor plate one, the slide rail three, the capacitor / inductor plate two, the slide rail two, the capacitor / inductor plate three, the slide rail one and the output soldering pad in sequence.
[0019] Further, the radio frequency circuit impedance regulator is connected with an external radio frequency circuit signal through the input soldering pad and the output soldering pad, and is used for adjusting the impedance of the radio frequency circuit.
[0020] The radio frequency circuit impedance regulator has the advantages that:
[0021] The radio frequency circuit impedance regulator is combined with the capacitor / inductor array through the QFN package soldering pad, so that the impedance is quickly adjusted. The structure is compact, the space of the radio frequency circuit is greatly saved, the PCB area and the cost are reduced. The adjusting knob and the sliding shaft are designed, so that the user can slide the knob according to the need, the impedance value is accurately adjusted through the sliding of the sliding shaft on the capacitor / inductor array, the components do not need to be replaced, the design process and the debugging steps are simplified. In addition, the impedance regulator does not need to be powered, and the use cost is reduced. In summary, the radio frequency circuit design is optimized, the debugging efficiency is improved, and the overall cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a schematic diagram of the overall structure of the utility model.
[0023] In the diagram: 1. Input pad; 2. GND pad; 3. Wire 1; 4. Output pad; 5. Knob 1; 6. Knob 2; 7. Knob 3; 8. Slide rail 1; 9. Slide rail 2; 10. Slide rail 3; 11. Capacitor / inductor board 1; 12. Capacitor / inductor board 2; 13. Capacitor / inductor board 3; 14. Wire 2; 15. Wire 3; 16. Wire 4; 17. GND board; 18. Wire 5; 100. Package; 200. Adjustment knob; 300. Capacitor / inductor board; 400. Slide rail. Detailed Implementation
[0024] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0025] Example 1
[0026] like Figure 1 As shown, this embodiment proposes an RF circuit impedance regulator, including a package 100, which is QFN packaged. The package 100 is provided with: an adjustment knob 200, a slide rail 400, a capacitor / inductor board 300, a GND board 17, and pads. The adjustment knob 200 and the slide rail 400 are slidably connected. The GND board 17 is arranged parallel to both sides of the capacitor / inductor board 300. The pads include an input pad 1, a GND pad 2, and an output pad 4. The input pad 1 is connected in series with the capacitor / inductor board 300, the slide rail 400, and the output pad 4 to form a signal transmission loop. The GND pad 2 is signal connected to the GND board 17. When the adjustment knob 200 is slid, the position of the adjustment knob 200 on the slide rail 400 is changed, so that the impedance of the capacitor / inductor board 300 connected to the signal transmission loop is changed.
[0027] More preferably, the capacitor / inductor board 300 is composed of a plurality of capacitor / inductor elements arranged in an array.
[0028] For example, such as Figure 1 In the package 1, three parallel capacitor / inductor plates 300 and six parallel GND plates 17 are respectively provided. Both sides of a capacitor / inductor plate 300 are provided with parallel GND plates 17.
[0029] More preferably, the encapsulation body 1 is filled with a high-temperature resistant insulating medium.
[0030] In a further preferred embodiment, the RF circuit impedance regulator also includes a sliding shaft located at the end of the adjustment knob 200, the sliding shaft passing through the slide rail 400 and slidably connected to the capacitor / inductor plate 300.
[0031] Further preferably, the adjusting knob 2 comprises knob one 5, knob two 6 and knob three 7, the capacitance / inductance plate 300 comprises capacitance / inductance plate one 11, capacitance / inductance plate two 12 and capacitance / inductance plate three 13, and the slide rail 400 comprises slide rail one 8, slide rail two 9 and slide rail three 10;
[0032] The input pad 1 is connected in series with the capacitance / inductance plate one 11, the slide rail three 10, the capacitance / inductance plate two 12, the slide rail two 9, the capacitance / inductance plate three 13, the slide rail one 8 and the output pad 4 in turn.
[0033] More specifically, in the package 1, the GND pad 2 is connected with the GND plate 17 through the wire one 3, the input pad 1 is connected with the capacitance / inductance plate one 11 through the wire five 18, the slide rail three 10 and the slide rail two 9 are connected through the wire four 16, the capacitance / inductance plate two 12 and the capacitance / inductance plate three 13 are connected through the wire two 14, and the output pad 4 is connected with the slide rail one 8 through the wire three 15.
[0034] In specific implementation, the knob one 5 moves left and right on the slide rail three 10, drives the sliding shaft to slide left and right on the capacitance / inductance plate one 11, and changes the impedance of the access path; the knob two 6 moves left and right on the slide rail two 9, drives the sliding shaft to slide left and right on the capacitance / inductance plate two 12, and changes the impedance of the access path; and the knob three 7 moves left and right on the slide rail one 8, drives the sliding shaft to slide left and right on the capacitance / inductance plate three 13, and changes the impedance of the access path.
[0035] In the specific implementation process, the impedance can be adjusted by rotating the corresponding knob according to the impedance requirement of the radio frequency circuit. Since the impedance adjuster of the present application does not need to frequently replace the capacitance / inductance element, the debugging process is greatly simplified, and the debugging efficiency is improved.
[0036] It can be understood that the radio frequency circuit impedance adjuster proposed in the embodiment is a passive device and can work without power supply, thereby reducing the use cost. A QFN packaging pad is arranged below the package 100, and the pad is easy to be welded on the transmission line of various radio frequency circuits requiring impedance adjustment. Specifically, the QFN packaging pad comprises an input pad 1, an output pad 4 and a GND pad 2, wherein the input and the output are connected to two sections of transmission lines requiring impedance matching.
[0037] In the embodiment, the device is internally provided with a capacitance / inductance plate 300 (array structure), which is the core part of realizing impedance adjustment. Through a specific connection structure, the adjusting knob 200 is connected with the QFN packaging pad and the capacitance / inductance array. When the knob is slid, the sliding shaft connected to the knob will slide on the capacitance array / inductance array, thereby changing the impedance of the signal link.
[0038] Further preferably, the radio frequency circuit impedance regulator is connected to an external radio frequency circuit signal through the input pad 4 and the output pad 6 for adjusting the impedance of the radio frequency circuit.
[0039] The working principle of the radio frequency circuit impedance regulator of the utility model is as follows:
[0040] Inside the device, except for the GND plate 17 and the capacitor / inductor plate 300, the rest is filled with high-temperature-resistant insulating medium. When working, the user adjusts the knob 200, thereby driving the corresponding sliding shaft to slide on the slide rail 400, and the sliding shaft slides on the capacitor / inductor plate 300. Since the impedance value of the capacitor / inductor array will change with the change of the sliding shaft, the impedance of the signal link will also change.
[0041] Such design makes the impedance regulator of the utility model be able to flexibly adapt to different radio frequency circuit impedance requirements. At the same time, since numerous Π type matching positions do not need to be reserved, the area of the radio frequency board can be greatly reduced, and the structural design difficulty and the bare board cost are reduced.
[0042] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. An impedance regulator for radio frequency circuits, characterized in that: Includes a package (100), wherein the package (100) is provided with: The adjustment knob (200) and the slide rail (400) are slidably connected; A capacitor / inductor board (300) and a GND board (17) are provided on both sides of the capacitor / inductor board (300) in parallel. The pads include an input pad (1), a GND pad (2), and an output pad (4). The input pad (1) is connected in series with the capacitor / inductor board (300), the slide rail (400), and the output pad (4) to form a signal transmission circuit; the GND pad (2) is connected to the GND board (17) for signal transmission. When the adjustment knob (200) is slid, the position of the adjustment knob (200) on the slide rail (400) is changed so that the capacitor / inductor plate (300) changes the impedance connected to the signal transmission circuit.
2. The radio frequency circuit impedance regulator according to claim 1, characterized in that: The pads are QFN packaged within the package (100).
3. The radio frequency circuit impedance regulator according to claim 1, characterized in that: The encapsulation body (100) is filled with a high-temperature resistant insulating medium.
4. The radio frequency circuit impedance regulator according to claim 1, characterized in that: The capacitor / inductor board (300) is composed of multiple capacitor / inductor elements arranged in an array.
5. The radio frequency circuit impedance regulator according to claim 1, characterized in that: It also includes a sliding shaft located at the end of the adjustment knob (200), the sliding shaft passing through the slide rail (400) and the capacitor / inductor plate (300) in a sliding connection.
6. The radio frequency circuit impedance regulator according to claim 5, characterized in that: The adjustment knob (200) includes knob one (5), knob two (6) and knob three (7), the capacitor / inductor plate (300) includes capacitor / inductor plate one (11), capacitor / inductor plate two (12) and capacitor / inductor plate three (13), and the slide rail (400) includes slide rail one (8), slide rail two (9) and slide rail three (10). The input pad (1) is connected in series with the capacitor / inductor board one (11), the slide rail three (10), the capacitor / inductor board two (12), the slide rail two (9), the capacitor / inductor board three (13), the slide rail one (8), and the output pad (4).
7. The radio frequency circuit impedance regulator according to claim 1, characterized in that: The RF circuit impedance regulator is connected to the external RF circuit signal via the input pad (1) and the output pad (4) to adjust the impedance of the RF circuit.