Small-size laminated onboard array antenna and remote control equipment

Abstract

The utility model relates to a small-size laminated onboard array antenna and remote control equipment, the antenna comprises a PCB laminated plate and an array antenna, and the PCB laminated plate is at least provided with a first laminated layer and a second laminated layer which are arranged in the PCB laminated plate; the array antenna comprises an antenna main body and a reflecting antenna; the antenna main body is arranged on the first lamination layer of the PCB, and the reflection antenna is arranged on the second lamination layer. According to the utility model, the array antenna is arranged in the laminated structure in the PCB laminated plate, so that poor antenna test stability caused by the fact that the antenna is exposed in the air is effectively avoided, and the size of the array antenna can be reduced at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless communication, in particular to a small-sized stacked board-mounted array antenna and a remote control device. Background Art

[0002] At present, UWB and StarFlash SLP technologies are gradually applied in remote control products to achieve the precise pointing function of remote controls. However, due to the application scenarios being different from traditional applications, it is required that the UWB or SLP antenna of the remote control product is a directional antenna, which is at a 90° direction relative to the remote control. Therefore, an antenna independent of the product PCB needs to be used in antenna design, and the independent antenna will greatly increase the price of the product.

[0003] Regarding the problem of the high price of independent antennas, related technologies use surface-mounted board-mounted antennas, which are arranged on the PCB board of the remote control, where half of the antenna is exposed to the air and half is in the FR4 board. However, the test stability of the antenna exposed to the air is poor, the service life is short, and it is impossible to achieve a small size. Summary of the Utility Model

[0004] Based on this, in view of the problem of poor stability of the remote control antenna, it is necessary to provide a small-sized stacked board-mounted array antenna and a remote control device.

[0005] A small-sized stacked board-mounted array antenna provided by the utility model includes a PCB stacked board and an array antenna. The PCB stacked board is at least provided with a first stack and a second stack built inside the PCB stacked board; the array antenna includes an antenna body and a reflection antenna; the antenna body is arranged on the first stack of the PCB, and the reflection antenna is arranged on the second stack.

[0006] In some embodiments, the PCB stacked board includes a first stacked board, a second stacked board, and a third stacked board. The first stack is located between the first stacked board and the second stacked board, and the second stack is located between the second stacked board and the third stacked board.

[0007] In some embodiments, both the first stacked board and the third stacked board are made of FR-4 material, and the second stacked board is made of polypropylene material.

[0008] In some embodiments, the antenna body includes a transmitting antenna body and a receiving antenna body, and both the transmitting antenna body and the receiving antenna body include a balun circuit, a primary radiation antenna, and a secondary radiation antenna.

[0009] In some embodiments, the isolation degree between the transmitting antenna body and the receiving antenna body is -19 dB @ 8 GHz.

[0010] In some of these embodiments, the effective bandwidth range of the array antenna is 6.58 GHz to 8.73 GHz.

[0011] In some of these embodiments, the maximum gain of the array antenna is 4.25 dBi @ 8 GHz.

[0012] In some of these embodiments, the array antenna is a UWB antenna or an SLP antenna.

[0013] The present utility model also provides a remote control device, including the above-mentioned small-sized stacked board-mounted array antenna.

[0014] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0015] 1. By arranging the array antenna in the stacked structure inside the PCB stacked board, the poor test stability of the antenna caused by the antenna being exposed to the air is effectively avoided, and at the same time, the array antenna can be miniaturized.

[0016] 2. The antenna body adopts a secondary radiation method to increase the radiation area and eliminate the limitation of the internal stack of the PCB on the radiation direction and angle of the antenna.

[0017] 3. The isolation degree between the transmitting antenna body and the receiving antenna body is set to -19 dB @ 8 GHz to avoid self-coupling interference between the antenna bodies and improve signal stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the small-sized stacked board-mounted array antenna shown in the embodiment of the present utility model;

[0019] Figure 2 Shown in the embodiment of the present utility model Figure 1 A schematic structural diagram of a partial enlarged view;

[0020] Figure 3 It is an exploded perspective structural diagram of the small-sized stacked board-mounted array antenna shown in the embodiment of the present utility model;

[0021] Figure 4 It is a schematic structural diagram of the antenna body shown in the embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used herein in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] See Figures 1 to 3 , a schematic structural diagram of a small-sized laminated board-mounted array antenna shown in an embodiment of the present utility model. The small-sized laminated board-mounted array antenna includes a PCB laminated board 1 and an array antenna 2. The PCB laminated board 1 is at least provided with a first laminate 11 and a second laminate 12 built inside the PCB laminated board 1; the array antenna 2 includes an antenna body 21 and a reflecting antenna 22; the antenna body 21 is disposed on the first laminate 11 of the PCB, and the reflecting antenna is disposed on the second laminate 12.

[0026] In this embodiment, the length of the half-wavelength antenna is equal to half of the wavelength (L = λ / 2), and the length of the quarter-wavelength antenna is equal to one-quarter of the wavelength (L = λ / 4). The wavelength λ = c / f, where c is the speed of light and f is the operating frequency. The resonant frequency of the dielectric antenna is related to the magnitude of the dielectric constant. Specifically, the antenna size L = k / (dielectric constant DK × resonant frequency f). Thus, at the same resonant frequency, the higher the relative dielectric constant, the smaller the antenna size. Since the relative dielectric constant of air is usually 1, the antenna size exposed to air usually cannot be made smaller, and the relative dielectric constant of air usually varies due to environmental temperature and humidity, so the test stability of the antenna exposed to air is poor. For this reason, the present utility model places the array antenna inside the inner stack of the PCB laminate, which can achieve a small-size antenna required for devices such as remote controls and improve the antenna stability at the same time.

[0027] Optionally, the array antenna 1 is a UWB antenna or a StarFlash SLP antenna, so that the device using this small-size stacked-board-mounted array antenna can meet the requirements of UWB wireless communication or StarFlash communication.

[0028] See Figure 2 and Figure 3 , in some embodiments, the PCB laminate 1 includes a first laminate 13, a second laminate 14, and a third laminate 15. The first stack 11 is located between the first laminate 13 and the second laminate 14, and the second stack 12 is located between the second laminate 14 and the third laminate 15.

[0029] In this embodiment, for a three-layer PCB, the side of the first laminate 13 exposed to air is the L1 layer, the first stack 11 is the L2 layer, the second stack 12 is the L3 layer, and the side of the third laminate 13 exposed to air is the L4 layer. The antenna body 21 and the reflective antenna 22 are respectively arranged on the L2 layer and the L3 layer, and the second laminate 14 can be provided with vias for wiring the L2 layer and the L3 layer.

[0030] Optionally, both the first laminate 13 and the third laminate 15 are made of FR-4 material, and the second laminate 15 is made of polypropylene material. FR-4 is the code for the flame-retardant material grade, that is, both the first laminate 13 and the third laminate 15 are 4th-grade flame-retardant materials. The relative dielectric constant of the FR-4 material is 4.2 - 4.7, which is much larger than the relative dielectric constant of air being 1. Therefore, based on the fact that at the same resonant frequency, the higher the relative dielectric constant, the smaller the antenna size, it can be known that the size of this array antenna is smaller than that of the current surface-mounted board-mounted array antenna, and the small-size of the array antenna can be achieved.

[0031] See Figure 4, in some embodiments, the antenna body 21 includes a transmitting antenna body 211 and a receiving antenna body 212, and both the transmitting antenna body and the receiving antenna body include a balun circuit 213, a primary radiation antenna 214, and a secondary radiation antenna 215.

[0032] In this embodiment, the balun circuit 213 converts the RF single-ended signal into an antenna differential signal, and the radiation antenna is used to radiate the antenna signal and convert the antenna differential signal into an electromagnetic signal. Due to the need to limit the radiation direction and angle, the secondary radiation antenna method is adopted in this embodiment to increase the radiation area.

[0033] Optionally, the isolation between the transmitting antenna body 211 and the receiving antenna body 212 is -19 dB @ 8 GHz. The isolation characterizes the power ratio between the signal transmitted by the transmitting antenna body 211 and the signal received by the receiving antenna 212. Since the array antenna is composed of two horizontally arranged antenna elements, in order to avoid self-coupling interference of the antenna elements, the design specification requires that the isolation between the two antenna bodies at the center frequency of 8 GHz is less than -15 dB, and the actual isolation designed in this solution is -19 dB @ 8 GHz, meeting the design specification.

[0034] In some embodiments, the effective bandwidth range of the array antenna 1 is 6.58 GHz to 8.73 GHz. Since the S11 parameter needs to meet the 500 MHz bandwidth requirement, it is usually required that the in-band return loss is lower than -10 dB, and the bandwidth meets the center frequency ±500 MHz. In this embodiment, the effective bandwidth range of the array antenna 1 with an in-band return loss lower than -10 dB is 6.58 GHz to 8.73 GHz, >500 MHz requirement, and this antenna meets the design specifications.

[0035] In some embodiments, the maximum gain of the array antenna 1 is 4.25 dBi @ 8 GHz. The design index requires that the maximum gain meets 2 dBi @ 8 GHz. The gain characterizes the signal amplification factor, or can be characterized as: under the condition of equal input power, the ratio of the power density of the signal generated by the actual antenna and the ideal radiation element at the same point in space. In electronics, it is usually the ratio of the signal output to the signal input of a system. For example, the antenna gain is a parameter representing the radiation concentration degree of a directional antenna, which is the ratio of the square of the electric field intensity generated by the directional antenna and the non-directional antenna in the predetermined direction. Its calculation formula is Gain = log10(P2 / P1) bel = 10×log10(P2 / P1) dB = (Pout - Pase) / Pin, where Pase is the spontaneous emission power of the EDFA within the signal bandwidth, and Pout and Pin are the output and input powers of the signal respectively, characterizing the amplification factor of the input signal. The larger this value is, the better the amplification ability of the antenna and the smaller the loss. In this embodiment, the maximum gain is 4.25 dBi @ 8 GHz, meeting the design requirements.

[0036] In some embodiments, the two-dimensional direction of the antenna XOY is characterized as the actual horizontal angle. Since the horizontal angle measurement and distance test are mainly used, it is required to be centered on 0° and the effective angle is not less than 120°. The actual angle in this embodiment is 160°, meeting the specification requirements.

[0037] The present utility model also provides a remote control device, including the above-mentioned small-size stacked board-mounted array antenna. This remote control device uses an internal antenna, which can greatly reduce the antenna size and can realize UWB distance and angle measurement on products with a smaller size. At the same time, the internal antenna is hardly affected by the environment, and its measurement reliability and stability are greatly improved, and the measurement error is small after long-term use. Compared with the expensive independent external antenna, the internal antenna does not require adding an LDS antenna independent of the PCB, greatly reducing the production cost of the device and enhancing the product competitiveness.

[0038] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0039] The above-mentioned embodiments only represent several implementation manners of the present utility model, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A small-sized laminated board-mounted array antenna, characterized in that: It includes a PCB laminate and an array antenna, wherein the PCB laminate is provided with at least a first laminate and a second laminate built inside the PCB laminate; the array antenna includes an antenna body and a reflective antenna; the antenna body is arranged on the first laminate of the PCB, and the reflective antenna is arranged on the second laminate.

2. The small-sized laminated board-mounted array antenna according to claim 1, characterized in that: The PCB laminate includes a first laminate, a second laminate and a third laminate, the first laminate is located between the first laminate and the second laminate, and the second laminate is located between the second laminate and the third laminate.

3. The small-sized laminated board-mounted array antenna according to claim 2, characterized in that: The first laminate and the third laminate are both made of FR-4 material, and the second laminate is made of polypropylene material.

4. The small-sized laminated board-mounted array antenna according to claim 1, characterized in that: The antenna body comprises a transmitting antenna body and a receiving antenna body, and both the transmitting antenna body and the receiving antenna body comprise a balun circuit, a primary radiating antenna and a secondary radiating antenna.

5. The small-sized laminated board-mounted array antenna according to claim 4, characterized in that: The isolation between the transmitting antenna body and the receiving antenna body is -19dB @ 8GHz.

6. The small-sized laminated board-mounted array antenna according to claim 1, characterized in that: The effective bandwidth range of the array antenna is 6.58 GHz to 8.73 GHz.

7. The small-sized laminated board-mounted array antenna according to claim 1, characterized in that: The maximum gain of the array antenna is 4.25dBi @ 8GHz.

8. The small-sized laminated board-mounted array antenna according to claim 1, characterized in that: The array antenna is a UWB antenna or a SLP antenna.

9. A remote control device, characterized in that: It comprises the small-sized laminated board-mounted array antenna as described in any one of claims 1 to 8.

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