PCB board integrated television receiving antenna

Abstract

The utility model provides a kind of PCB board integrated formula television receiving antenna, including the radiation unit, feed point, ground plane and signal interface integrated on PCB board, radiation unit is located on the large area copper sheet of PCB board upper half portion, it is T-shaped structure;Feed point is located at the tail end of longitudinal portion of T-shaped structure, and feed point is connected TV / set top box through signal interface;Ground plane is located on the large area copper sheet of PCB board front and back, and its front and back are connected through via on PCB board, and ground plane is concave, and it is matched to form improved dipole antenna structure with the radiation unit.The utility model integrates television receiving antenna on PCB board, small in size, easy to manufacture;And radiation unit is designed as T-shaped structure, and multi-band coverage can be realized.

Description

Technical Field

[0001] This utility model relates to the field of wireless communication and receiving technology, and more specifically, to a PCB-integrated television receiving antenna. Background Technology

[0002] Currently, television receiving antennas mainly fall into two categories: outdoor metal rod antennas and simple indoor antennas.

[0003] 1. Although outdoor metal pole antennas have strong receiving capabilities, they are large in size, complex to install, and have high costs.

[0004] 2. Indoor simple antennas are small in size, but they are usually a single telescopic rod or a small loop, which have problems such as low receiving sensitivity, poor directivity and insufficient operating bandwidth.

[0005] With the widespread adoption of smart TVs, set-top boxes, and miniaturized terminals, there is an urgent need for a small, low-cost, and stable TV receiving antenna that can be directly integrated into the circuit board, reducing the impact of external antennas on the product's appearance. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a PCB-integrated television receiving antenna that is small in size, low in cost, and stable in performance.

[0007] According to a first aspect of this utility model, a PCB-integrated television receiving antenna is provided, comprising a radiating element, a feed point, a ground plane, and a signal interface integrated on a PCB. The radiating element is a large area of ​​copper foil located on the upper half of the PCB, forming a T-shaped structure. The feed point is located at the tail end of the longitudinal portion of the T-shaped structure, and the feed point is connected to a television / set-top box through the signal interface. The ground plane is a large area of ​​copper foil located on the front and back of the PCB, and its front and back are connected through vias on the PCB. The ground plane is concave and cooperates with the radiating element to form an improved dipole antenna structure.

[0008] The receiving dipole antenna structure formed by the radiating element and the ground plane receives radio frequency signals and transmits them to the television / set-top box via the feed point and the signal interface.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Optionally, the radiating element is used to receive VHF / UHF band signals, and the T-shaped radiating element is designed with multiple stepped structures.

[0011] Optionally, a plurality of the stepped structures extend along the tail end of the longitudinal portion of the T-shaped structure, and the width of the steps decreases progressively.

[0012] Optionally, an impedance matching circuit is integrated on the PCB. The impedance matching circuit is located between the feed point and the signal interface. The impedance matching circuit includes inductors, capacitors, and resistors. The impedance matching circuit is used to tune the impedance matching of the TV receiving antenna.

[0013] Optionally, the signal interface is a standard 75Ω coaxial connector, the power supply point is connected to the signal interface, and the signal interface is connected to the inner conductor of the coaxial cable.

[0014] Optionally, the radiating element and the grounding plane are coupled in a mirror-coupled manner to form an electromagnetic field coupling structure.

[0015] This utility model provides a PCB board integrated TV receiving antenna, which integrates the TV receiving antenna on the PCB board, making it small in size and easy to manufacture; and the radiating unit is designed as a T-shaped structure, which can achieve multi-band coverage. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a PCB board integrated television receiving antenna is provided for one embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of a PCB-integrated television receiving antenna, provided as another embodiment of the present invention.

[0018] In the attached image:

[0019] 1. Radiation unit, 2. Grounding plane, 3. Feed point, 4. Signal interface, 5. Impedance matching circuit. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In addition, the technical features of the various embodiments or individual embodiments provided by this utility model can be arbitrarily combined to form feasible technical solutions. Such combinations are not bound by the order of steps and / or structural composition patterns, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] Figure 1 An embodiment of this utility model provides a PCB-integrated television receiving antenna, such as... Figure 1 As shown, the television receiving antenna includes a radiating element 1, a feed point 3, a ground plane 2, and a signal interface 4 integrated on a PCB board. The radiating element 1 is a large copper area located on the upper half of the PCB board, forming a T-shape. The feed point 3 is located at the tail end of the vertical portion of the T-shape and is connected to a television / set-top box via the signal interface 4. The ground plane 2 is a large copper area located on both the front and back sides of the PCB board, connected via vias on the PCB board. The ground plane 2 is concave and, together with the radiating element 1, forms an improved dipole antenna structure.

[0022] The improved dipole antenna structure formed by the radiating element 1 and the ground plane 2 receives radio frequency signals, which are transmitted to the television / set-top box via the feed point 3 and the signal interface 4.

[0023] Among them, see Figure 1 and Figure 2 The PCB-integrated television receiving antenna provided by this utility model mainly consists of five parts: a radiating unit 1, a feed point 3, a grounding plane 2, an impedance matching circuit 5, and a signal interface 4. Each component is described below.

[0024] Radiation unit 1 refers to Figure 1 The large copper area located on the upper half of the PCB board has a T-shaped radiating unit 1, which is mainly used to receive VHF / UHF band signals.

[0025] In an embodiment of this utility model, the radiating unit 1 of the T-shaped structure is designed with multiple stepped structures. These stepped structures extend along the tail end of the longitudinal portion of the T-shaped structure, and the width of each step decreases progressively. For example, Figure 1 and Figure 2 As shown, the top of the longitudinal section of the T-shaped structure refers to the segment connected to the transverse section of the T-shaped structure, while the tail end refers to the other end of the T-shaped structure. Multiple steps (stairs, segmented structures) are designed along the extension direction from the top to the tail of the T-shaped structure, and the width of the steps gradually decreases along the extension direction.

[0026] The radiating element is designed as a T-shaped structure, and multiple stepped structures are designed within the T-shaped radiating element, which has the following characteristics:

[0027] (1) Equivalent electrical length adjustment:

[0028] Each additional step in the radiating element is like "adding a distance" to the antenna's current path. This extends the equivalent electrical length without increasing the overall PCB size, allowing the antenna to resonate at lower frequencies. The more steps in the design, the longer the effective length, and the better the low-frequency coverage.

[0029] (2) Multi-band / broadband characteristics:

[0030] The horizontal portion of the "T" shape effectively increases the electrical length, similar to an extension line or branch. It can create multiple resonances at different frequency points, thus covering a wider bandwidth (e.g., VHF + UHF). This is particularly suitable for television signals, as television broadcasts cover tens to hundreds of MHz, not a single frequency point.

[0031] (3) Reduce physical size:

[0032] If only a single linear radiating arm is used, the antenna would be very large to meet the λ / 4 length requirement for low frequencies (e.g., around 100 MHz). The "T"-shaped lateral portion increases the effective electrical length, allowing for a lower resonant frequency to be achieved within the same PCB area, i.e., "smaller size for larger size".

[0033] (4) More flexible impedance matching:

[0034] The "T"-shaped structure makes the current distribution more complex, and the resonances generated by different branches can superimpose or harmonize with each other. Combined with the impedance matching circuit on the PCB, this makes it easier for the antenna input impedance to approach 75Ω, reducing the VSWR and improving reception efficiency.

[0035] (5) Directional improvement:

[0036] The radiation direction of a conventional linear dipole antenna is relatively fixed, while the distribution of the "T"-shaped arms allows for a more dispersed current distribution. This can improve the radiation pattern to some extent, avoid dead zones, and enhance the stability of indoor reception.

[0037] (6) Simple structure and easy to process:

[0038] Achieving a "T" shape on a PCB simply involves extending a section of copper, eliminating the need for complex 3D metal components. Costs remain virtually unchanged, but performance is significantly improved, making it ideal for integrated designs (TVs, set-top boxes, small terminals).

[0039] The power supply point 3 is located at the tail end of the T-shaped structure, which is also the center of the lower half of the PCB board. Power supply point 3 connects to the TV / set-top box via signal interface 4. Signal interface 4 is a standard 75Ω coaxial connector. Power supply point 3 connects to signal interface 4, and signal interface 4 connects to the conductor inside the coaxial connector. An impedance matching circuit 5 can be designed between power supply point 3 and signal interface 4.

[0040] Ground plane 2 refers to the large copper area located on the front and back of the PCB board, which are connected by numerous vias. Ground plane 2 is concave in shape and, together with radiating element 1, forms an improved dipole antenna structure. Radiating element 1 and ground plane 2 work in a "mirror-coupled" manner. Simply put, radiating element 1 and ground plane 2 are similar to a pair of "positive and negative electrodes," jointly forming an electromagnetic field. Ground plane 2 is connected to the ground terminal of the external circuit.

[0041] Radiation element 1 is responsible for "sound emission," while ground plane 2 is responsible for "resonance." They work together through three mechanisms—mirror image, capacitive coupling, and current return—to enable the antenna to achieve broadband, efficient, and stable signal reception within a limited space.

[0042] The grounding plane 2 is designed as a concave structure, which has the following characteristics:

[0043] (1) Equivalent to a choke ring:

[0044] The concave structure is equivalent to a choke ring in the high-frequency band, which suppresses the flow of current on the outer conductor of the coaxial line and keeps the antenna pattern pure.

[0045] (2) Adjust the current path to change the equivalent electrical length:

[0046] A concave ground plane allows current to travel along the edges, extending the electrical length of the ground plane.

[0047] This means that the ground plane is not just a "simple mirror," but participates in resonance together with the radiating element, which can shift the resonant point to a lower frequency. It also allows for low-frequency (VHF) reception within a limited PCB size.

[0048] (3) Forming a coupled structure and broadbanding

[0049] The grooves make the electric field distribution between the radiating element and the ground plane more complex, essentially adding several "parasitic elements." These parasitic elements couple with the radiating element, creating additional resonant points. This results in a wider bandwidth, covering more television signal sub-bands.

[0050] (4) Impedance matching optimization:

[0051] A standard, perfectly rectangular ground plane often has a relatively rigid input impedance. By creating notches, certain areas of the ground plane exhibit capacitive or inductive loading, making it easier to adjust the antenna's input impedance to close to 75Ω. This reduces the VSWR and improves reception efficiency.

[0052] (5) Improve the radiation pattern:

[0053] A perfectly formed ground can cause the radiation pattern to be too concentrated, resulting in weak signals in certain directions. A concave structure, on the other hand, "breaks the symmetry," making the current distribution more uniform and the radiation pattern smoother. Indoor reception is more stable, and the problem of "signal loss when the placement angle changes" is less likely to occur.

[0054] In one embodiment of this invention, an impedance matching circuit 5 is provided between the feed point 3 and the signal interface 4. The impedance matching circuit 5 consists of inductors, capacitors, and resistors, and is used to tune the impedance matching between the antenna and the receiver, reducing reflection loss. The impedance matching circuit 5 can be integrated on a PCB board or externally placed on the cable connecting to the TV / set-top box.

[0055] Among them, the impedance matching circuit 5 ensures that the VSWR of the antenna remains within an acceptable range in the 50MHz~800MHz wide frequency band, thereby achieving stable reception of television signals.

[0056] The working principle of the TV receiving antenna provided by this utility model is as follows: the improved dipole antenna structure formed by the radiating element 1 and the ground plane 2 receives radio frequency signals, which are transmitted to the TV / set-top box via the feed point 3 and the signal interface 4.

[0057] The PCB-integrated TV receiving antenna provided in this embodiment of the utility model has the following advantages:

[0058] (1) Integrating the TV receiving antenna directly on the PCB board simplifies the structure and reduces costs.

[0059] (2) The radiating unit and the grounding plane adopt a “T” shaped radiating unit + grounding plane design to achieve wideband reception.

[0060] (3) Introduce a dedicated impedance matching circuit in the TV receiving antenna to improve bandwidth and signal quality.

[0061] (4) Integrate the TV receiving antenna on the PCB board and modularize each part of the TV receiving antenna to facilitate integration with smart TVs and set-top box motherboards.

[0062] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0063] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0064] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A PCB-integrated television receiving antenna, characterized in that, The device includes a radiating unit (1), a ground plane (2), a feed point (3), and a signal interface (4) integrated on a PCB board. The radiating unit (1) is a large area of ​​copper foil located on the upper half of the PCB board, and has a T-shaped structure. The feed point (3) is located at the tail end of the vertical part of the T-shaped structure, and the feed point (3) is connected to a TV / set-top box through the signal interface (4). The ground plane (2) is a large area of ​​copper foil located on the front and back of the PCB board, and its front and back are connected through vias on the PCB board. The ground plane (2) is concave and cooperates with the radiating unit (1) to form an improved dipole antenna structure. The improved dipole antenna structure formed by the radiating element (1) and the ground plane (2) receives radio frequency signals and transmits them to the television / set-top box via the feed point (3) and the signal interface (4).

2. The television receiving antenna according to claim 1, characterized in that, The radiating unit (1) is used to receive VHF / UHF band signals, and the T-shaped radiating unit (1) is designed with multiple stepped structures.

3. The television receiving antenna according to claim 2, characterized in that, The plurality of the stepped structures extend along the tail end of the longitudinal portion of the T-shaped structure, and the width of the steps decreases progressively.

4. The television receiving antenna according to claim 1, characterized in that, An impedance matching circuit (5) is integrated on the PCB. The impedance matching circuit (5) is located between the feed point (3) and the signal interface (4). The impedance matching circuit (5) includes inductors, capacitors and resistors. The impedance matching circuit (5) is used to tune the impedance matching of the TV receiving antenna.

5. The television receiving antenna according to claim 1, characterized in that, The signal interface (4) is a standard 75Ω coaxial connector. The power supply point (3) is connected to the signal interface (4), and the signal interface (4) is connected to the conductor inside the coaxial connector.

6. The television receiving antenna according to claim 1, characterized in that, The radiating unit (1) and the grounding plane (2) are coupled in a mirror-coupled manner to form an electromagnetic field coupling structure.

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