Coupled antenna with frequency modulation function

Abstract

The utility model discloses a coupled antenna with a frequency modulation function, which comprises a substrate, a grounding unit and a radiation unit which are arranged on the substrate, and a frequency modulation element which is arranged on the radiation unit and is used for adjusting the frequency of the coupled antenna, the grounding unit is provided with a grounding point, the radiation unit is provided with a feeding point, and the frequency modulation element is used for adjusting the frequency of the coupled antenna. A first gap used for coupling feed is arranged between the grounding unit and the radiation unit, the radiation unit is provided with a second gap used for coupling feed, and the frequency of the coupled antenna can be adjusted by adjusting the frequency modulation element. According to the utility model, the cost can be saved, and the light and thin or miniaturized design can be met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of coupling antenna, especially, relate to a coupling antenna with frequency modulation function.

BACKGROUND

[0002] Most of the communication products use antenna devices to realize the function of wireless transmission to meet the needs of consumers. However, with the increasing functions and smaller size of communication products, miniaturized antenna devices not only need to provide multiple frequency bands, but also need to have a smaller size.

[0003] In the prior art, the coupling antenna disclosed in Chinese Patent Publication No. CN106785414A includes a dielectric substrate, a radiation unit and a ground unit are provided on the dielectric substrate, characterized in that one end of the ground unit extends a parasitic unit, the parasitic unit and the ground unit form a concave area, the radiation unit is arranged in the concave area, the radiation unit includes a first radiation arm arranged on one side of the ground unit and a second radiation arm arranged on one side of the parasitic unit. The coupling antenna generates high frequency through the first radiation arm, then adjusts the size of the first radiation arm and the size of the first gap between the first radiation arm and the ground unit to adjust the impedance matching of the high frequency band (5.15GHz-5.85GHz), and further tunes the resonant frequency. The second radiation arm generates low frequency, and the size of the second radiation arm and the size of the second gap are adjusted to adjust the impedance matching of the low frequency band (2.4GHz-2.5GHz), and further tune the resonant frequency. However, the above-mentioned scheme still has the following three problems:

[0004] (1) The above-mentioned scheme adjusts the frequency by adjusting the distance between the radiation arm and the gap. Since the radiation body, the ground unit and the parasitic unit are metal patches formed by laser or printing on the dielectric substrate, if other frequency antennas are needed, a new material number needs to be established to re-form the antenna, and if multiple frequency antennas need to be tested, multiple frequency antennas need to be formed, which will increase the production cost.

[0005] (2) Moreover, the above-mentioned scheme can only realize the impedance matching of the high frequency band (5.15GHz-5.85GHz) and the low frequency band (2.4GHz-2.5GHz), and cannot realize the low frequency band below 2.4GHz.

[0006] (3) The structure of the radiation body, the ground unit and the parasitic unit in the above-mentioned scheme is complex, which is not convenient for welding and printing, and will increase the molding difficulty and production cost.

[0007] Therefore, it is necessary to provide a coupling antenna with frequency modulation function to solve the above-mentioned technical problems. The utility model discloses a kind of coupled antennas with frequency modulation function, can save cost, also can meet the design of light and thin or miniaturization.

[0008] The main purpose of the utility model is to provide a kind of coupled antennas with frequency modulation function, can save cost, also can meet the design of light and thin or miniaturization.

[0009] The utility model discloses a kind of coupled antennas with frequency modulation function, which realizes the above-mentioned purposes by the following technical solutions: a kind of coupled antennas with frequency modulation function, it includes substrate, ground unit and radiation unit being set on the substrate and the frequency modulation element for adjusting the coupling antenna frequency being set on the radiation unit, ground point is provided on the ground unit, feed point is provided on the radiation unit, first gap for coupling feed is provided between the ground unit and the radiation unit, second gap for coupling feed is provided on the radiation unit, the adjustment of coupling antenna frequency can be realized by adjusting the frequency modulation element.

[0010] Further, the ground unit and the radiation unit are opposite to each other and are in the shape of rectangular sheet, and the first gap is located between the ground unit and the radiation unit.

[0011] Further, the ground point is located at the lower right corner of the ground unit, the feed point is located at the lower left corner of the radiation unit, and the ground point and the feed point are opposite to each other and located on both sides of the first gap.

[0012] Further, the second gap is set as a U-shaped gap with the opening facing left, the second gap includes a first segment gap extending horizontally rightward from the left side of the radiation unit, a second segment gap extending vertically upward from the first segment gap, and a third segment gap extending horizontally leftward from the second segment gap.

[0013] Further, the right end of the first segment gap, the upper and lower ends of the second segment gap, and the left end of the third segment gap are all located inside the radiation unit.

[0014] Further, the frequency modulation element is welded on the radiation unit at the position of the third segment gap, and the radiation unit is provided with a pad for welding the frequency modulation element.

[0015] Further, the ground unit and the radiation unit are arranged on the same surface of the substrate.

[0016] Further, the frequency modulation element is selected from one of resistance, capacitance, or inductance.

[0017] Further, the ground unit and the radiation unit are both metal patches formed by laser direct forming or printing on the substrate.

[0018] Further, the ground unit and the radiation unit are arranged on different surfaces of the substrate.

[0019] Compared with the prior art, the coupling antenna with the frequency adjustment function has the advantages that:

[0020] (1) The frequency adjustment element is arranged on the radiation unit, and the frequency of the coupling antenna can be adjusted by adjusting the parameters, position and type of the frequency adjustment element, so that the efficiency of the test is improved, and the cost is saved.

[0021] (2) The ground unit and the radiation unit are arranged on the same surface of the substrate, so that the thickness of the coupling antenna is reduced, and the design of thinning is suitable, and the ground unit and the radiation unit can also be arranged on different surfaces of the substrate, so that the size of the coupling antenna is reduced, and the design of miniaturization is suitable, so that the scheme can adapt to different requirements and meet the design of thinning or miniaturization. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The structure diagram of the coupling antenna with the frequency adjustment function is shown in the embodiment of the utility model.

[0023] The numbers in the figure represent:

[0024] 100 - the coupling antenna with the frequency adjustment function;

[0025] 1 - the substrate, 2 - the ground unit, 3 - the radiation unit, 4 - the frequency adjustment element, 5 - the first gap;

[0026] 6 - the second gap, 61 - the first section gap, 62 - the second section gap, 63 - the third section gap; 7 - the grounding point, 8 - the feeding point.

DETAILED DESCRIPTION

[0027] Embodiment one:

[0028] Please refer to Figure 1 The embodiment is a coupling antenna 100 with the frequency adjustment function, and the coupling antenna 100 with the frequency adjustment function comprises a substrate 1, a ground unit 2 and a radiation unit 3 arranged on the substrate 1, and a frequency adjustment element 4 arranged on the radiation unit 3 and used for adjusting the frequency of the coupling antenna. The ground unit 2 is provided with a grounding point 7, the radiation unit 3 is provided with a feeding point 8, a first gap 5 for coupling feeding is arranged between the ground unit 2 and the radiation unit 3, a second gap 6 for coupling feeding is arranged on the radiation unit 3, and the frequency of the coupling antenna can be adjusted by adjusting the frequency adjustment element 4.

[0029] The ground unit 2 and the radiation unit 3 are metal patches formed on the substrate 1 by laser direct structuring or printing, and have a small thickness and a simple forming process, thus reducing production cost.

[0030] In this embodiment, the ground unit 2 and the radiation unit 3 are arranged on the same surface of the substrate 1, thus reducing the thickness of the coupled antenna and being suitable for thin design. In this embodiment, the periphery of the ground unit 2 and the radiation unit 3 is close to the edge of the substrate 1, thus reducing the size of the coupled antenna as much as possible.

[0031] In this embodiment, the ground unit 2 and the radiation unit 3 are rectangular patches arranged opposite to each other, and the first gap 5 is located in the middle of the ground unit 2 and the radiation unit 3. The ground unit 2 and the radiation unit 3 not only have a simple structure, but also have a simple layout, thus facilitating welding and printing forming and reducing the difficulty of forming and the production cost.

[0032] In this embodiment, the grounding point 7 is located at the lower right corner of the ground unit 2, and the feeding point 8 is located at the lower left corner of the radiation unit 3. Therefore, the grounding point 7 and the feeding point 8 are arranged opposite to each other and located on both sides of the first gap 5, and the grounding point 7 and the feeding point 8 are adjacent to each other, thus facilitating the connection of other wires.

[0033] In other embodiments, the positions of the grounding point 7 and the feeding point 8 can be adjusted according to actual conditions, and thus the specific positions of the grounding point 7 and the feeding point 8 are not limited herein.

[0034] In this embodiment, the second gap 6 is designed as a U-shaped gap with an opening to the left. The second gap 6 includes a first section gap 61 extending horizontally to the right from the left side of the radiation unit 3, a second section gap 62 extending vertically upward from the first section gap 61, and a third section gap 63 extending horizontally to the left from the second section gap 62. The right end of the first section gap 61 is located inside the radiation unit 3, the upper and lower ends of the second section gap 62 are located inside the radiation unit 3, and the left end of the third section gap 63 is located inside the radiation unit 3. The specific sizes of the radiation unit 3, the first section gap 61, the second section gap 62, and the third section gap 63 are adjusted according to the design principle of the antenna, and thus are not limited herein. In actual application, the coupled amount obtained by the second gap 6 designed in this way can obtain an antenna with a low frequency, such as a commonly used 868MHz frequency or other low frequency bands (0-2.4GHz).

[0035] In other embodiments, the sizes of the first section gap 61, the second section gap 62, and the third section gap 63 can be adjusted to change the coupled amount, thus obtaining an antenna with other frequency bands.

[0036] In another embodiment, the structure of the second slot 6 can be redesigned according to the frequency band actually needed, the coupling amount is changed by changing the structure of the second slot 6, so that the antenna of other frequency bands is obtained.

[0037] The frequency of the coupled antenna is changed by welding the frequency adjusting element 4 on the radiating unit 3, and the adjustment of the frequency of the coupled antenna can be realized by adjusting the frequency adjusting element 4. Specifically, the adjustment of the frequency of the coupled antenna can be realized by adjusting the parameters and position of the frequency adjusting element 4, or directly adjusting the type of the frequency adjusting element 4.

[0038] In this embodiment, if the frequency of the coupled antenna is 868MHz, a 0Ω resistor can be welded on the radiating unit 3 to obtain a coupled antenna with a frequency of 915MHz. At this time, the 0Ω resistor is located on the radiating unit 3 at the position of the third section slot 63, and the soldering pads for welding the resistor are arranged on the radiating unit 3 on both sides of the third section slot 63. If other low frequency bands (0-2.4GHz) are needed, for example, 1.6GHz or 2.4GHz, the resistance value of the resistor can be changed to achieve the desired frequency, or the position of the resistor can be changed. This is set according to the actual situation. Of course, a plurality of soldering pads can be arranged at different positions of the radiating unit 3 to facilitate welding of the resistor at different positions of the radiating unit. Compared with the prior art, the antenna of multiple other frequencies does not need to be reshaped. Only the original resistor needs to be de-soldered and re-soldered with a resistor of a different resistance value or the position of the resistor needs to be changed to change the frequency of the antenna. This facilitates testing of multiple frequency antennas, improves testing efficiency, and saves costs.

[0039] In other embodiments, the frequency adjusting element 4 can be a capacitor or an inductor. The specific parameters or positions of the inductor or capacitor can be adjusted to adjust the frequency of the coupled antenna. Correspondingly, a plurality of soldering pads can be arranged at different positions of the radiating unit 3 to facilitate welding of the capacitor or inductor at different positions of the radiating unit to adjust the frequency of the coupled antenna. This facilitates testing of multiple frequency antennas, improves testing efficiency, and saves costs.

[0040] Embodiment two:

[0041] In this embodiment, the ground unit 2 and the radiating unit 3 are arranged on different surfaces of the substrate 1, which can reduce the size of the coupled antenna and is suitable for miniaturized design.

[0042] In this embodiment, the ground unit 2, the radiating unit 3, the first slot 5, and the second slot 6 can be adjusted according to the required frequency band. The type, parameter value, and position of the frequency adjusting element 4 can be set according to the actual situation, which is not limited herein.

[0043] The above merely describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A coupled antenna with frequency modulation function, characterized in that: It includes a substrate, a grounding unit and a radiating unit disposed on the substrate, and a frequency modulation element disposed on the radiating unit for adjusting the frequency of the coupled antenna. The grounding unit is provided with a grounding point, the radiating unit is provided with a feed point, a first gap for coupling feed is provided between the grounding unit and the radiating unit, and a second gap for coupling feed is provided on the radiating unit.

2. A coupled antenna with frequency modulation function as described in claim 1, characterized in that: The grounding unit and the radiating unit are opposite each other and are both rectangular plates. The first gap is located between the grounding unit and the radiating unit.

3. A frequency-modulated coupled antenna as described in claim 1, characterized in that: The grounding point is located at the lower right corner of the grounding unit, and the feed point is located at the lower left corner of the radiating unit. The grounding point and the feed point are opposite each other and located on both sides of the first gap.

4. A frequency-modulated coupled antenna as described in claim 1, characterized in that: The second gap is configured as a U-shaped gap with its opening facing left. The second gap includes a first section gap extending horizontally to the right from the left side of the radiation unit, a second section gap extending vertically upward from the first section gap, and a third section gap extending horizontally to the left from the second section gap.

5. A frequency-modulated coupled antenna as described in claim 4, characterized in that: The right end of the first segment gap, the upper and lower ends of the second segment gap, and the left end of the third segment gap are all located inside the radiation unit.

6. A frequency-modulated coupled antenna as described in claim 4, characterized in that: The frequency modulation element is welded to the radiating unit at the gap position of the third section, and the radiating unit is provided with a pad for welding the frequency modulation element.

7. A frequency-modulated coupled antenna as described in any one of claims 1 to 6, characterized in that: The grounding unit and the radiation unit are disposed on the same surface of the substrate.

8. A frequency-modulated coupled antenna as described in claim 1, characterized in that: The frequency modulation element is selected from a resistor, capacitor, or inductor.

9. A frequency-modulated coupled antenna as described in claim 1, characterized in that: Both the grounding unit and the radiating unit are metal patches that are laser-formed or printed on the substrate.

10. A coupled antenna with frequency modulation function as described in claim 1, characterized in that: The grounding unit and the radiation unit are disposed on different surfaces of the substrate.

Images