PCB built-in antenna with adjustable capacitor

Abstract

The utility model relates to the technical field of antenna structures, and discloses a PCB built-in antenna with an adjustable capacitor in order to solve the technical problems of high cost, complex process production and poor stability caused by the fact that an existing antenna design structure can only realize a single fixed frequency. Comprising a substrate used for printing electrodes and installing components, the substrate is provided with seven electrodes and a plurality of combination devices, the first electrode is used for feeding in RF signals, the second electrode and the seventh electrode are distributed on the two sides of the first electrode, and a sixth electrode, a fourth electrode and a third electrode used for signal flowing through are sequentially arranged between the first electrode and the second electrode. A sixth electrode and a fifth electrode through which signals flow are sequentially arranged between the first electrode and the seventh electrode, and combined devices for adjusting antenna parameters are arranged between the electrodes. The first electrode part, the second electrode part and the seventh electrode part are used for generating capacitance to form electromagnetic waves, the needed frequency is achieved by adjusting electrical devices connected with the electrodes, and the signal receiving and transmitting function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of antenna structures, in particular to a PCB built-in antenna with adjustable capacitance. Background Art

[0002] With the rapid development of the field of wireless communications, various antenna structures have been widely used in wearable products or 5G network equipment. Variable multi-band fixed-frequency antennas replace traditional antennas because of their simple structure, convenient design, low cost, strong compatibility and other advantages. They are truly energy-saving and therefore suitable for wireless network communications including Bluetooth devices, remote control devices, star flash devices, new energy equipment and other uses. Traditional antennas are expensive, complex in production process and have poor stability. This causes the antenna to lose its function. The main function of the variable multi-band fixed-frequency antenna is that there is no need for an external antenna. It only needs to use the metal layer of the original circuit plus capacitive or inductive or resistive or metal layer direct-through devices to combine and achieve coupled resonance, thereby matching the frequency required by the chip end.

[0003] The existing antenna design structure is generally a double-piece or multi-piece metal sheet design or an external long antenna, with a first metal sheet bonded to the upper side of the medium by thick film technology or thin film technology, and a second metal sheet bonded to the lower side of the medium by thick film technology or thin film technology. And it can only achieve a single fixed frequency, and it needs to be used with a special antenna on the market, which limits the use of products and greatly increases the cost. Utility Model Content

[0004] The utility model aims to provide a PCB built-in antenna with adjustable capacitance, so as to solve the technical problems that the existing antenna design structure can only achieve a single fixed frequency, resulting in high cost, complex production process and poor stability.

[0005] To achieve the above purpose, the specific technical solution of a PCB built-in antenna with adjustable capacitance of the utility model is as follows:

[0006] A PCB built-in antenna with adjustable capacitance, characterized in that it includes a substrate for printing electrodes and installing components, the substrate is provided with a first electrode, a second electrode, a third electrode, a fourth electrode, a fifth electrode, a sixth electrode, a seventh electrode and a plurality of combination devices, the first electrode is used to feed an RF signal, the second electrode and the seventh electrode are distributed on both sides of the first electrode, the sixth electrode, the fourth electrode and the third electrode for signal flow are sequentially arranged between the first electrode and the second electrode, the sixth electrode and the fifth electrode for signal flow are sequentially arranged between the first electrode and the seventh electrode, and a combination device for adjusting antenna parameters is arranged between each electrode.

[0007] Furthermore, the antenna is a variable multi-band fixed-frequency antenna, and each electrode is a single layer or multiple layers of parallel layers.

[0008] Furthermore, the plurality of combined devices are each composed of one or more devices connected to form an inductive device, a capacitive device, a resistive device, and a through-connection.

[0009] Furthermore, the capacity, frequency and electromagnetic waves generated by each electrode are connected to the feed line RF connection electronic device through the second electrode to reach the IC radio frequency pin.

[0010] Furthermore, a metal layer is laid at each electrode in parallel with the circuit to increase the antenna signal.

[0011] Furthermore, the plurality of combined devices also include a metal sheet.

[0012] Furthermore, the substrate is a ceramic material, a resin material or a polymer PCB material.

[0013] Furthermore, each electrode material is made of silver, copper or nickel alloy.

[0014] The utility model provides a PCB built-in antenna with adjustable capacitance, which has the following advantages:

[0015] The present application provides a variable multi-band fixed-frequency antenna design, which reduces the cost while reducing the size of the antenna. It greatly improves the signal radiation receiving surface of the product, thereby improving the antenna efficiency and gain, and fully realizing the intelligent, modern and miniaturized product. It can achieve coupling of multiple resonant frequency points, and there is no need to consider how and where the antenna should be placed. It only needs to cooperate with capacitive, inductive or resistive devices on the original circuit to debug the frequency set by itself. Through the flexible setting of each electrode and each combined device, the use of external PCB board plus capacitors can truly save costs, and the rational use of the PCB radiation surface greatly increases the antenna efficiency and gain, reduces the high cost factor of product signal difference, and also reduces the size of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the assembly structure of an implementation example provided by the utility model.

[0017] In the figure: 1, first electrode; 2, second electrode; 3, third electrode; 4, fourth electrode; 5, fifth electrode; 6, sixth electrode; 7, seventh electrode; 8, combined device. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] See also Figure 1 The utility model provides a PCB built-in antenna with adjustable capacitance, which is used for a circuit board, and includes a substrate for printing electrodes and installing components. The substrate is provided with a first electrode 1, a second electrode 2, a third electrode 3, a fourth electrode 4, a fifth electrode 5, a sixth electrode 6, a seventh electrode 7 and a plurality of combination devices 8. The first electrode 1 is used to feed an RF signal, and the second electrode 2 and the seventh electrode 7 are distributed on both sides of the first electrode 1. The sixth electrode 6, the fourth electrode 4, and the third electrode 3 for signal flow are sequentially arranged between the first electrode 1 and the second electrode 2. The sixth electrode 6 and the fifth electrode 5 for signal flow are sequentially arranged between the first electrode 1 and the seventh electrode 7. A combination device 8 for adjusting antenna parameters is arranged between each electrode. A metal layer parallel to the circuit for increasing antenna signals is laid at each electrode.

[0020] The first electrode 1, the second electrode 2 and the seventh electrode 7 generate capacitance to form electromagnetic waves, and the required frequency is achieved by adjusting the electrical devices at the positions of the combined devices 8 to provide signal transceiver functions. Each electrode has a metal layer, or a metal layer parallel to the circuit through punching, non-punching, straight-through, etc. can greatly increase the antenna signal.

[0021] The electrodes are arranged on the surface and back of the substrate, the first electrode 1 is located on the surface of the substrate, and the substrate uses the electrodes and the area of ​​the electrodes to generate capacitance. The first electrode 1 is connected to the signal feed line RF, and the other electrodes are selectively grounded, so it has a powerful signal receiving and transmitting effect.

[0022] The present application can adjust the capacity and increase the welding area through the setting of each metal electrode, thereby improving the bonding strength and bending resistance of the product and reducing the probability of product failure.

[0023] By combining various components, the capacity can be adjusted and the traditional antenna can be eliminated. There is no need for any external antenna, which can make the product more compact and reduce the cost to almost zero.

[0024] Furthermore, in order to adjust the frequency more accurately, each combination device 8 is composed of one or more electrical devices connected in series or in parallel with inductive devices, capacitors, resistors, or directly connected. The positions of all electrodes and all combination devices can also be directly replaced by metal sheets. Each combination device is composed of one or more inductive devices, or one or more capacitive devices, or one or more resistive devices, forming a circuit connected in parallel or in series or in series and in parallel, or directly connected. By changing the value of the circuit device, the coupling frequency is adjusted to achieve the frequency point required.

[0025] Preferably, the plurality of combined devices 8 further include metal sheets. By properly designing the shape and position of the metal sheets, better impedance matching can be achieved, thereby improving the performance of the antenna. The metal sheets can also be used as part of an adjustable capacitor, and the capacitance value can be adjusted by changing the distance or relative area between the metal sheets, thereby adjusting the antenna frequency.

[0026] Preferably, the substrate is a ceramic material, a resin material or a polymer PCB material. Ceramic material, resin material or polymer PCB material as the antenna substrate not only helps to miniaturize and thin the antenna, but also provides good electrical performance and environmental adaptability, and can effectively meet the requirements of modern communication technology for material performance.

[0027] Preferably, each electrode material is silver, copper or nickel alloy. Silver and copper are metals with extremely high electrical conductivity, so they are very efficient in transmitting current and reduce energy loss. Silver-copper alloy maintains high electrical conductivity and thermal conductivity, which is very suitable for occasions requiring high electrical conductivity.

[0028] In summary: the present application is a variant multi-band fixed frequency antenna, a first electrode 1 is set on a substrate of a dielectric material to connect the signal feed line RF, a second electrode 2 and a seventh electrode 7 are set to connect the PCB ground line, and the first electrode 1, the second electrode 2 and the seventh electrode 7 are partially used to generate capacitance to form electromagnetic waves, and the required frequency is achieved by adjusting the electrical devices connected to the electrodes, so as to provide signal receiving and transmitting functions. Each electrode has a metal layer, or a metal layer parallel to the circuit by punching, non-punching, straight-through, etc. can greatly increase the antenna signal. The electrodes are set on the surface and back of the substrate, the first electrode 1 is located on the surface of the substrate, and the substrate uses the electrodes and the area of ​​the electrodes to generate capacitance. The first electrode 1 is connected to the signal feed line RF, and the other electrodes are selectively connected to the ground of the circuit board, so it has a powerful signal receiving and transmitting effect. The setting of each electrical device is that the present application can adjust the capacity and no longer use the traditional antenna, and no external antenna is required, which makes the product more miniaturized and can also reduce the cost to almost zero.

[0029] The utility model provides a PCB built-in antenna with adjustable capacitance, which has the following advantages:

[0030] The present application provides a variable multi-band fixed-frequency antenna design, which reduces the cost while reducing the size of the antenna. It greatly improves the signal radiation receiving surface of the product, thereby improving the antenna efficiency and gain, and fully realizing the intelligent, modern and miniaturized product. It can achieve coupling of multiple resonant frequency points, and there is no need to consider how and where the antenna should be placed. It only needs to cooperate with capacitive, inductive or resistive devices on the original circuit to debug the frequency set by itself. Through the flexible setting of each electrode and each combined device, the use of external PCB board plus capacitors can truly save costs, and the rational use of the PCB radiation surface greatly increases the antenna efficiency and gain, reduces the high cost factor of product signal difference, and also reduces the size of the antenna.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit 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 PCB built-in antenna with adjustable capacitance, characterized in that: The invention comprises a substrate for printing electrodes and installing components, wherein the substrate is provided with a first electrode (1), a second electrode (2), a third electrode (3), a fourth electrode (4), a fifth electrode (5), a sixth electrode (6), a seventh electrode (7) and a plurality of combined devices (8), wherein the first electrode (1) is used to feed an RF signal, the second electrode (2) and the seventh electrode (7) are distributed on both sides of the first electrode (1), the sixth electrode (6), the fourth electrode (4) and the third electrode (3) are arranged in sequence between the first electrode (1) and the second electrode (2), the sixth electrode (6) and the fifth electrode (5) are arranged in sequence between the first electrode (1) and the seventh electrode (7), and a combined device (8) for adjusting antenna parameters is arranged between the electrodes.

2. The PCB built-in antenna with adjustable capacitance according to claim 1, characterized in that: The antenna is a variable multi-band fixed-frequency antenna, and each electrode is one or more parallel layers.

3. The PCB built-in antenna with adjustable capacitance according to claim 1, characterized in that: The plurality of combined devices (8) are each composed of one or more devices connected to form an inductance device, a capacitance device, a resistance device, and a through-hole.

4. The PCB built-in antenna with adjustable capacitance according to claim 1, characterized in that: The capacity, frequency and electromagnetic waves generated by each electrode are connected to the feed line RF connection electronic device through the second electrode (2) to reach the IC radio frequency pin.

5. According to the PCB built-in antenna with adjustable capacitance as claimed in claim 1, a metal layer parallel to the circuit for increasing the antenna signal is laid at each electrode.

6. The PCB built-in antenna with adjustable capacitance according to claim 3, characterized in that: The plurality of combined devices (8) further comprise metal sheets.

7. The PCB built-in antenna with adjustable capacitance according to claim 1, characterized in that: The substrate is made of ceramic material, resin material or polymer PCB material.

8. The PCB built-in antenna with adjustable capacitance according to claim 1, characterized in that: The electrode materials are silver, copper or nickel alloy.

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