Broadband antenna

Abstract

The utility model discloses a broadband antenna, which relates to the technical field of antennas, aims to solve the problem that the bandwidth of the existing antenna is improved by increasing the area of the antenna, and the use of an installation space is influenced by the increase of the area of the antenna, and comprises a first substrate, a fixed pin, an antenna ground, an antenna feed point and other components, a second substrate is fixed to the top end of the first substrate, an antenna matching network and frequency dividers U1, U2 and U3 are arranged on the second substrate, the second substrate is further connected with a supporting plate with a port, an antenna oscillator is fixed to the top of the supporting plate, an oscillator port is electrically connected with the frequency dividers through a microstrip cable, the frequency dividers and a synthesizer are added to antenna feeding and grounding positions, and after a radio frequency signal enters a circuit, the radio frequency signal is transmitted to the antenna. The single-frequency oscillator is divided into a high-frequency part and a low-frequency part through the frequency divider, the antenna is matched to high frequency through the high-frequency part, the antenna is matched to low frequency through the low-frequency part, the low-frequency characteristic and the high-frequency characteristic of the same single-frequency oscillator are achieved through different matching modes, the purpose of improving the broadband is achieved, and the application scene is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and specifically relates to a broadband antenna. Background Art

[0002] With the diversification of functions of wireless communication devices and consumer electronic products, the requirements for antenna design are becoming increasingly stringent. On the one hand, it must match the product shape design and take into account good reception effects. On the other hand, it must meet the electromagnetic wave characteristics of various wireless communication technologies, making the antenna technology continuously move towards broadband and miniaturization. To pursue the beauty of the shape of terminal products, developing smaller-sized antennas has become an important topic for manufacturers' product development. The monopole antenna emerged under this market trend. It removes the negative radiator of the dipole antenna and replaces it with a metal ground plane. In this way, the length of the antenna is only half of that of the dipole antenna, and better radiation effects can be achieved. Subsequently, the industry further developed a folded monopole antenna design for reducing the antenna volume, bending the metal wire, which not only reduces the antenna configuration volume but also improves the problem of the antenna radiation blind area at the bending point.

[0003] For example, a patent with the publication number CN101420062A discloses a broadband antenna, which includes: a substrate, a coupling part, a serial conductor, a grounding conductor, and a ground plane; the coupling part includes a first coupling part and a second coupling part, the serial conductor and the grounding conductor are connected to the end of the second coupling part, wherein the serial conductor extends in a direction away from the second coupling part; the ground plane is connected to the other end of the grounding conductor. However, current antennas all achieve the purpose of increasing the antenna bandwidth by increasing the antenna area, and the increased antenna area affects the use of its installation space.

[0004] In view of the above problems, a broadband antenna is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a broadband antenna, which works with this device, thus solving the problem in the above background that the existing antenna increases the antenna area to achieve the purpose of increasing the antenna bandwidth, while the increased antenna area affects the use of the installation space.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A broadband antenna includes a first substrate. Fixed feet are respectively and evenly spaced and fixedly connected to both sides of the bottom edge of the first substrate. At one end of the top of the first substrate, there is an antenna ground. An antenna feeding point is arranged at the top edge of the first substrate on one side of the antenna ground. The top of the first substrate adjacent to the antenna ground is set as an antenna forbidden area. The top end of the first substrate is fixedly connected to a second substrate. An antenna matching network is arranged at the top of the second substrate corresponding to the antenna ground. A number of frequency dividers are fixedly connected at the antenna matching network at even intervals. The frequency dividers include frequency divider U1, U2 and U3. The second substrate is fixedly connected to a support plate. A through hole is opened at the end of the support plate corresponding to the antenna matching network. When the support plate is attached to the top of the second substrate, the through hole sleeves outside the antenna matching network. And an antenna oscillator is fixedly connected to the top of the support plate. A vibrator port is arranged at one side edge of the end of the antenna oscillator. The vibrator port is electrically connected to the frequency divider through a microstrip cable.

[0007] Further, the 2nd pins of the frequency dividers U1 and U2 are respectively connected to the port1 port and the port2 port. The 6th pin of the frequency divider U1 is connected to an inductor L1. The other end of the inductor L1 is connected to the 6th pin of the frequency divider U2. Capacitors C1 and C2 are respectively connected to the nodes at both ends of the inductor L1. The other ends of the capacitors C1 and C2 are both connected to the ground wire. And the 4th pin of the frequency divider U1 is connected to a capacitor C3. The other end of the capacitor C3 is connected to the 4th pin of the frequency divider U2. Inductors L2 and L3 are respectively connected to the nodes at both ends of the capacitor C3. The other ends of the inductors L2 and L3 are both connected to the ground wire.

[0008] Further, the port1 port and the port2 port are respectively used for wire feeding and vibrator feeding.

[0009] Further, the 1st, 3rd and 5th pins of the frequency dividers U1 and U2 are all respectively connected to the ground wire.

[0010] Further, the 2nd pin of the frequency divider U3 is connected to a port3 port. The port3 port is set as a vibrator ground. The 4th pin and the 6th pin of the frequency divider U3 are respectively connected to a capacitor C4 and an inductor L4. The other ends of the capacitor C4 and the inductor L4 are both respectively connected to the ground wire.

[0011] Further, the 1st, 3rd and 5th pins of the frequency divider U3 are all respectively connected to the ground wire.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] A broadband antenna proposed by the present utility model, in the single oscillator mode, divides the radio frequency signal into high-frequency and low-frequency parts through a frequency division matching network and matches them respectively to achieve the purpose of broadband of the antenna and improve the performance; adopts a stacked structure, with the upper layer being the antenna oscillator and the middle layer being the matching network, reducing the antenna area and improving the space utilization rate; at the same time, the antenna presented in the form of a chip can be used in more scenarios, expanding the application range and providing a more reliable and efficient solution for the wireless communication functions of various electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a circuit diagram of the working principle of the frequency divider of the present utility model.

[0016] In the figure: 1, the first substrate; 2, the fixed foot; 3, the antenna ground; 4, the antenna feed point; 5, the antenna forbidden air area; 6, the second substrate; 7, the antenna matching network; 8, the frequency divider; 9, the support plate; 10, the antenna oscillator; 11, the oscillator port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] To further understand the content of the present utility model, the present utility model will be described in detail in conjunction with the accompanying drawings.

[0019] In order to solve the problem that the existing antenna increases the antenna bandwidth by increasing the antenna area, while the increase in the antenna area affects the use of the installation space, please refer to Figure 1 and Figure 2 , and the following preferred technical solutions are provided:

[0020] A broadband antenna of the present utility model is composed of a first substrate 1, fixing feet 2, an antenna ground 3, an antenna feed point 4, an antenna forbidden zone 5, a second substrate 6, an antenna matching network 7, a frequency divider 8, a support plate 9, an antenna oscillator 10, an oscillator port 11, etc. The first substrate 1, the second substrate 6, the support plate 9, etc. are all made of FR4 material. On both sides of the bottom edge of the first substrate 1, a number of fixing feet 2 are evenly spaced and fixedly connected. At one end of its top, there is an antenna ground 3. At the edge on one side of the antenna ground 3, there is an antenna feed point 4. The area adjacent to the antenna ground 3 is set as the antenna forbidden zone 5. The top end of the first substrate 1 is fixedly connected to the second substrate 6. At the position corresponding to the antenna ground 3 on the top of the second substrate 6, there is an antenna matching network 7. A number of frequency dividers 8 (the model of the frequency divider 8 is DPX162690DT - 5058A1), including frequency dividers U1, U2, and U3, are evenly spaced and fixedly connected to this network. There is also a support plate 9 fixedly connected to the second substrate 6. A through - hole is opened at the end of the support plate 9 corresponding to the antenna matching network 7. When the support plate 9 is attached to the top of the second substrate 6, the through - hole sleeves outside the antenna matching network 7. The top of the support plate 9 is fixedly connected to the antenna oscillator 10. At the edge on one side of the end of the antenna oscillator 10, there is an oscillator port 11. This port is electrically connected to the frequency divider 8 through a microstrip cable.

[0021] The following further describes the present utility model in conjunction with embodiments.

[0022] The 2nd pins of the frequency dividers U1 and U2 are respectively connected to the port1 port and the port2 port. The port1 port and the port2 port are respectively used for wire feeding and oscillator feeding. The 6th pin of the frequency divider U1 is connected to the inductor L1. The other end of the inductor L1 is connected to the 6th pin of the frequency divider U2. Capacitors C1 and C2 are respectively connected to the nodes at both ends of the inductor L1. The other ends of the capacitors C1 and C2 are both connected to the ground wire. The capacitors C1 and C2 are used for low - frequency matching. At the same time, the 4th pin of the frequency divider U1 is connected to the capacitor C3. The other end of the capacitor C3 is connected to the 4th pin of the frequency divider U2. Inductors L2 and L3 are respectively connected to the nodes at both ends of the capacitor C3. The other ends of the inductors L2 and L3 are also connected to the ground wire. The inductors L2 and L3 are used for high - frequency matching. The 1st, 3rd, and 5th pins of the frequency dividers U1 and U2 are all respectively connected to the ground wire.

[0023] The 2nd pin of the frequency divider U3 is connected to the port3 port, which is set as the oscillator ground. The 4th pin and the 6th pin of the frequency divider U3 are respectively connected to the capacitor C4 and the inductor L4. The other ends of the capacitor C4 and the inductor L4 are both respectively connected to the ground wire. The capacitor C4 is used for high - frequency ground matching, and the inductor L4 is used for low - frequency ground matching. The 1st, 3rd, and 5th pins of the frequency divider U3 are all respectively connected to the ground wire.

[0024] Specifically, a frequency divider and a synthesizer are added at the antenna feed and grounding points. After the radio frequency signal enters the circuit, it is divided into high-frequency and low-frequency parts by the frequency divider 8. The high-frequency part matches the antenna to the high frequency, and the low-frequency part matches the antenna to the low frequency. The same single-frequency oscillator realizes low-frequency and high-frequency characteristics through different matching methods. By changing the matching method, the antenna bandwidth is increased, and each frequency controls the antenna bandwidth through different paths, achieving the purpose of wideband antenna under one oscillator. At the same time, in order to reduce the antenna area, a stacked structure is adopted. The top layer is the antenna oscillator, and the middle layer is the matching network. The antenna oscillator adopts a loop antenna mode. The stacked structure reduces the antenna area and improves the antenna space utilization rate. The whole antenna is in the form of a chip and can be used in more scenarios, providing the applicability of the antenna.

[0025] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A broadband antenna, comprising a first substrate (1), and fixing feet (2) are fixedly connected to both sides of the bottom edge of the first substrate (1) at equal intervals respectively, and it is characterized in that: At one end of the top of the first substrate (1), an antenna ground (3) is provided. At the top edge of the first substrate (1) on one side of the antenna ground (3), an antenna feed point (4) is provided. The top of the first substrate (1) adjacent to the antenna ground (3) is set as an antenna clearance area (5). The top end of the first substrate (1) is fixedly connected to a second substrate (6). At the position corresponding to the antenna ground (3) on the top of the second substrate (6), an antenna matching network (7) is provided. A number of frequency dividers (8) are fixedly connected at the antenna matching network (7) at uniform intervals. The frequency dividers (8) include frequency dividers U1, U2, and U3. The second substrate (6) is fixedly connected to a support plate (9). A through hole is opened at the end of the support plate (9) corresponding to the antenna matching network (7). When the support plate (9) is attached to the top of the second substrate (6), the through hole sleeves the outside of the antenna matching network (7). And an antenna oscillator (10) is fixedly connected to the top of the support plate (9). At one side edge of the end of the antenna oscillator (10), an oscillator port (11) is provided. The oscillator port (11) is electrically connected to the frequency divider (8) through a microstrip cable.

2. A broadband antenna according to claim 1, characterized in that: The 2nd pins of the frequency dividers U1 and U2 are respectively connected to the port1 port and the port2 port. The 6th pin of the frequency divider U1 is connected to an inductor L1. The other end of the inductor L1 is connected to the 6th pin of the frequency divider U2. Capacitors C1 and C2 are respectively connected to the nodes at both ends of the inductor L1. The other ends of the capacitors C1 and C2 are both connected to the ground wire. And the 4th pin of the frequency divider U1 is connected to a capacitor C3. The other end of the capacitor C3 is connected to the 4th pin of the frequency divider U2. Inductors L2 and L3 are respectively connected to the nodes at both ends of the capacitor C3. The other ends of the inductors L2 and L3 are both connected to the ground wire.

3. A broadband antenna according to claim 2, characterized in that: The port1 port and the port2 port are respectively used for wire feeding and oscillator feeding.

4. A broadband antenna according to claim 3, characterized in that: The 1st, 3rd, and 5th pins of the frequency dividers U1 and U2 are all respectively connected to the ground wire.

5. A broadband antenna according to claim 1, characterized in that: The 2nd pin of the frequency divider U3 is connected to a port3 port. The port3 port is set as an oscillator ground. The 4th and 6th pins of the frequency divider U3 are respectively connected to a capacitor C4 and an inductor L4. The other ends of the capacitor C4 and the inductor L4 are both respectively connected to the ground wire.

6. A broadband antenna according to claim 5, characterized in that: The 1st, 3rd, and 5th pins of the frequency divider U3 are all respectively connected to the ground wire.

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