A New Dual-Polarized Digital TV Antenna

Abstract

The invention discloses a novel dual-polarized digital television antenna, comprising a mounting plate, on which are arranged first and second antenna elements symmetrically arranged around a center point in a horizontal direction, and third and fourth antenna elements symmetrically arranged around the center point in a vertical direction, wherein the first, second, third and fourth antenna elements comprise arc segments, first straight segments and second straight segments which are enclosed together to form a fan-shaped blade, and the connection point of the first and second straight segments is used as an output end; a PCB board, on which are arranged first, second, third and fourth matching modules connected to the first, second, third and fourth antenna elements, the single-port output composed of the first and second matching modules is connected in parallel with the single-port output composed of the third and fourth matching modules, and then the signal is output through the fifth matching module; through the above structure, the same efficiency can be achieved when receiving vertically and horizontally polarized signals, the polarization loss is minimized, and the gain after the two groups of antennas are combined can be enhanced to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of wireless communications, and in particular to a novel dual-polarization digital television antenna. Background Art

[0002] The antenna vibrator receives the weak electromagnetic waves in the air and sends them to the transceiver through the coaxial cable for processing. Signal transmission is divided into vertical polarization and horizontal polarization. The transceiver antenna is also divided into vertical polarization and horizontal polarization. The signal and the antenna polarization must be consistent to maximize the efficiency of the received signal.

[0003] Most of the existing antennas on the market work in single polarization mode. The two polarization modes of the antenna are set separately by installing the antenna horizontally or vertically, but only one polarization mode can be used at the same time, resulting in one antenna being unable to send and receive signals of two polarization modes at the same time, thereby reducing the receiving and transmitting performance of the device. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a novel dual-polarized digital television antenna.

[0005] The technical solution adopted by an embodiment of the present invention to solve the technical problem is: a novel dual-polarized digital television antenna, comprising:

[0006] A mounting plate is provided on which first and second antenna elements are symmetrically arranged around a center point in the horizontal direction and third and fourth antenna elements are symmetrically arranged around the center point in the vertical direction, the first, second, third and fourth antenna elements include an arc segment, a first straight line segment and a second straight line segment that are collectively enclosed to form a fan blade shape, and a connection point between the first and second straight line segments serves as an output end;

[0007] A PCB board is provided with a first matching module connected to a first antenna element, a second matching module connected to a second antenna element, a third matching module connected to a third antenna element, and a fourth matching module connected to a fourth antenna element. The single-port output composed of the first and second matching modules is connected in parallel with the single-port output composed of the third and fourth matching modules, and the output end after parallel connection outputs a signal through a fifth matching module.

[0008] Furthermore, the first matching module includes a capacitor C1 and an inductor L1, one end of the capacitor C1 is connected to the output end of the first antenna element, the other end of the capacitor C1 is respectively connected to one end of the inductor L1 and the second, third, fourth and fifth matching modules, and the other end of the inductor L1 is grounded.

[0009] Furthermore, the fifth matching module includes a capacitor C5 and an inductor L5-6, one end of the capacitor C5 is respectively connected to one end of the inductor L5 and the output ends of the first, second, third and fourth matching modules, the other end of the capacitor C5 is respectively connected to one end of the inductor L6 and an external device, the other end of the inductor L5 and the other end of the inductor L6 are grounded, and the fifth matching module can match the impedance after parallel connection to 75Ω and then output it.

[0010] Furthermore, a novel dual-polarization digital television antenna also includes a front cover and a rear cover, the mounting plate is connected between the front cover and the rear cover through a connecting structure, and the PCB board is arranged in the front cover or the rear cover.

[0011] Furthermore, the connection structure is configured as a bolt connection structure, and the bolts are simultaneously connected to the front cover, the mounting plate, the PCB board and the rear cover to form a whole.

[0012] Furthermore, the fifth matching module outputs the signal through a coaxial cable.

[0013] The beneficial effects of the present invention are as follows: a novel dual-polarized digital television antenna comprises a mounting plate, on which are arranged first and second antenna elements symmetrically arranged around a center point in a horizontal direction and third and fourth antenna elements symmetrically arranged around the center point in a vertical direction, the first, second, third and fourth antenna elements comprising an arc segment, a first straight line segment and a second straight line segment which are enclosed together to form a fan blade shape, and the connection point of the first and second straight line segments is used as an output end; a PCB board, on which are arranged first, second, third and fourth matching modules connected to the first, second, third and fourth antenna elements, the single-port output composed of the first and second matching modules is connected in parallel with the single-port output composed of the third and fourth matching modules, and then the signal is output through the fifth matching module; through the above structure, the same efficiency can be achieved when receiving vertically and horizontally polarized signals, the polarization loss is minimized, and the gain after the two groups of antennas are combined will be enhanced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 It is a structural schematic diagram of a new type of dual-polarized digital TV antenna;

[0016] Figure 2 This is an exploded view of a new dual-polarized digital TV antenna;

[0017] Figure 3 It is a schematic diagram of the structure of the antenna vibrator;

[0018] Figure 4 This is the circuit schematic on the PCB board;

[0019] Figure 5 This is the radiation pattern of a new dual-polarized digital TV antenna at 0 degrees (Phi=0) on the E plane;

[0020] Figure 6 This is a new type of dual-polarized digital TV antenna with a 90 degree (Phi=90) radiation pattern on the E plane;

[0021] Figure 7 The radiation pattern of a new dual-polarization digital TV antenna in the H plane (Theta = 90). DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0023] In the description of the present invention, the meaning of "above", "below", "exceed", etc. is not inclusive of the number itself, and the meaning of "above", "below", "within", etc. is inclusive of the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0026] Reference Figures 1 to 7 , a new dual-polarized digital TV antenna, comprising:

[0027] A mounting plate 10 is provided with first and second antenna elements 21, 22 symmetrically arranged around a center point in the horizontal direction and third and fourth antenna elements 23, 24 symmetrically arranged around the center point in the vertical direction. The first, second, third and fourth antenna elements 21, 22, 23, 24 include an arc segment 31, a first straight segment 32 and a second straight segment 33 that are collectively enclosed into a fan-blade shape, and a connection point between the first and second straight segments 32, 33 serves as an output end;

[0028] The PCB board 40 is provided with a first matching module 51 connected to the first antenna element 21, a second matching module 52 connected to the second antenna element 22, a third matching module 53 connected to the third antenna element 23, and a fourth matching module 54 connected to the fourth antenna element 24. The single-port output composed of the first and second matching modules 51 and 52 is connected in parallel with the single-port output composed of the third and fourth matching modules 53 and 54, and the parallel output end outputs a signal through the fifth matching module 55.

[0029] In the present invention, the antenna uses four antenna elements, including the first, second, third and fourth antenna elements 21, 22, 23 and 24, which are divided into two groups of resonant design modes, wherein the first and second antenna elements 21 and 22 are horizontally polarized signal receiving antenna elements, and the third and fourth antenna elements 23 and 24 are vertically polarized signal receiving antenna elements. Furthermore, in order to expand the bandwidth of the antenna, the first, second, third and fourth antenna elements 21, 22, 23 and 24 are set to be a fan-shaped blade formed by an arc segment 31, a first straight line segment 32 and a second straight line segment 33, and the connection point of the first and second straight line segments 32 and 33 is used as an output end. Each group of antenna ports adopts an LC balun (Balance to The dual-port antenna is converted into a single-port output by the first, second, third and fourth matching modules 51, 52, 53 and 54, and the outputs of the two groups of antennas are connected in parallel after the Barun transformation. After the parallel connection, an LCΠ-type matching circuit is added, i.e., the fifth matching module 55. The fifth matching module 55 can match the combined impedance to 75Ω and prevent the antenna from introducing susceptance to affect the performance of the entire antenna. The present invention adopts a design method in which four antenna elements are divided into two groups of resonances. Such a design method can achieve the same efficiency when the antenna is placed in any direction when receiving vertically polarized and horizontally polarized signals, and can minimize the polarization loss. After the two groups of antennas are combined, the gain of the entire antenna will be enhanced to a certain extent.

[0030] Referring to Table 1, which is a table of gain and efficiency of the present invention at various frequencies, it can be seen that the antenna structure of the present invention has good gain and efficiency at various frequencies. Figure 5-7, which are respectively the radiation pattern of the present invention at 0 degrees (Phi=0) on the E plane, the radiation pattern at 90 degrees (Phi=90) on the E plane, and the radiation pattern on the H plane (Theta=90). It can be seen that the reception effects of horizontal polarization and vertical polarization signals at various frequencies are better.

[0031] Table 1

[0032]

[0033]

[0034] The first matching module 51 includes a capacitor C1 and an inductor L1. One end of the capacitor C1 is connected to the output end of the first antenna element 21. The other end of the capacitor C1 is connected to one end of the inductor L1 and the second, third, fourth and fifth matching modules 52, 53, 54 and 55 respectively. The other end of the inductor L1 is grounded.

[0035] The fifth matching module 55 includes a capacitor C5 and an inductor L5-6. One end of the capacitor C5 is connected to one end of the inductor L5 and the output ends of the first, second, third and fourth matching modules 51, 52, 53, 54 respectively. The other end of the capacitor C5 is connected to one end of the inductor L6 and an external device respectively. The other end of the inductor L5 and the other end of the inductor L6 are grounded. The fifth matching module 55 can match the impedance after parallel connection to 75Ω and then output it.

[0036] A novel dual-polarized digital TV antenna further includes a front cover 61 and a rear cover 62 , a mounting plate 10 is connected between the front cover 61 and the rear cover 62 via a connecting structure, and a PCB board 40 is disposed in the front cover 61 or the rear cover 62 .

[0037] The connection structure is configured as a bolt connection structure, and the bolts 70 are simultaneously connected to the front cover 61, the mounting plate 10, the PCB board 40 and the rear cover 62 to form a whole.

[0038] The fifth matching module 55 outputs a signal through the coaxial cable 70 .

[0039] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A novel dual-polarized digital TV antenna, characterized in that: include: A mounting plate (10) is provided on which first and second antenna elements (21, 22) are symmetrically arranged around a center point in the horizontal direction, and third and fourth antenna elements (23, 24) are symmetrically arranged around the center point in the vertical direction, wherein the first, second, third and fourth antenna elements (21, 22, 23, 24) include an arc segment (31), a first straight segment (32) and a second straight segment (33) which together enclose a fan blade shape, and a connection point between the first and second straight segments (32, 33) serves as an output end; A PCB board (40) on which a first matching module (51) connected to the first antenna element (21), a second matching module (52) connected to the second antenna element (22), a third matching module (53) connected to the third antenna element (23), and a fourth matching module (54) connected to the fourth antenna element (24) are arranged; a single-port output formed by the first and second matching modules (51, 52) and a single-port output formed by the third and fourth matching modules (53, 54) are connected in parallel; and a signal is output at the output end after the parallel connection through a fifth matching module (55); The first matching module (51) comprises a capacitor C1 and an inductor L1, one end of the capacitor C1 is connected to the output end of the first antenna element (21), the other end of the capacitor C1 is respectively connected to one end of the inductor L1 and the second, third, fourth and fifth matching modules (52, 53, 54, 55), and the other end of the inductor L1 is grounded; The fifth matching module (55) comprises a capacitor C5 and an inductor L5-6, one end of the capacitor C5 is respectively connected to one end of the inductor L5 and the output ends of the first, second, third and fourth matching modules (51, 52, 53, 54), the other end of the capacitor C5 is respectively connected to one end of the inductor L6 and an external device, the other end of the inductor L5 and the other end of the inductor L6 are grounded, and the fifth matching module (55) can match the impedance after parallel connection to 75Ω and then output.

2. The novel dual-polarized digital television antenna according to claim 1, characterized in that: It also comprises a front cover (61) and a rear cover (62), the mounting plate (10) being connected between the front cover (61) and the rear cover (62) via a connecting structure, and the PCB board (40) being arranged in the front cover (61) or the rear cover (62).

3. The novel dual-polarized digital television antenna according to claim 2, characterized in that: The connection structure is configured as a bolt connection structure, and the bolts (70) are simultaneously connected to the front cover (61), the mounting plate (10), the PCB board (40) and the rear cover (62) to form a whole.

4. The novel dual-polarized digital television antenna according to claim 1, characterized in that: The fifth matching module (55) outputs a signal via a coaxial cable (70).

Images