CN101192709A - Digital television receiving antenna suitable for plug-and-play device - Google Patents

Abstract

The invention provides a digital television receiving antenna suitable for plug-and-play device, the digital television receiving antenna includes: a first conductive portion; and a second conductive part coupled to the first conductive part and having a resonant path, wherein the second conductive part is adjustable in position relative to the first conductive part, and an effective length of the resonant path is greater than a linear distance between two end points of the resonant path.

Description

Digital TV Receiving Antennas for Plug and Play Installations

technical field

The present invention relates to an antenna, in particular to a digital TV receiving antenna suitable for a plug-and-play device.

Background technique

At present, there are three sets of technical standards for Digital Television Broadcasting in the world, namely: ATSC (Advanced Television Systems Committee) for the United States, DVB-T (Digital Video Broadcasting-Terrestrial) for Europe, and ISDB-T (Terrestrial) for Japan. Integrated Services Digital Broadcasting). Compared with the traditional analog television broadcasting (AnalogTelevision Broadcasting) system using the NTSC (National Television Standard Committee) system, digital television broadcasting is a television system that converts television signals from "analog signals" to "digital signals". After digitizing the TV broadcast signal, some signal processing methods can be used to compress the digital signal before transmission, which can increase the efficiency of bandwidth usage, and signal processing can also be used to remove the noise accumulated during the transmission of digital signals , to greatly improve the signal quality received by the client. In addition to the advantages of mobile reception (mobile reception), the European standard system's modulation (COFDM) standard signal can more effectively solve the problem of multi-path (anti-multipath) interference, so Taiwan currently adopts European standard DVB -T system.

Although there are already quite a few digital TV signal receiving and demodulating modules on the market that are designed on a small-sized system ground plane, and use USB (Universal Serial Bus) as the transmission interface to connect to desktop or notebook computers. Ready-to-use digital television receiver. However, most plug-and-play digital TV receiving devices on the market use external receiving antennas. Such external receiving antennas must additionally require a connecting transmission line to connect the antenna to the plug-and-play digital TV receiving device. In addition to being inconvenient to carry, it will take up a lot of extra storage space and damage the appearance of the product, and the connection transmission line is often disconnected and used, and it is easy to cause poor contact of the internal transmission material. Taiwan Utility Model Patent No. M270,510 "Digital TV Receiver Box with Antenna". Big disadvantage. In order to solve these problems, we propose an innovative and miniaturized planar digital TV receiving antenna design, which can not only generate an operating bandwidth covering Taiwan's digital TV channels (530-602MHz), but also has a simple structure, easy fabrication, and Advantages of lightweight. At the same time, due to the appropriate miniaturization design of the antenna of the present invention, not only the overall height of the antenna is greatly reduced in the use state, but also the antenna is very easy to be directly bent and stored in the non-use state, so the antenna of the present invention is quite suitable Digital TV receiving antenna applied as a plug-and-play device.

Contents of the invention

The object of the present invention is to provide a kind of innovative miniaturized digital TV receiving antenna design suitable for plug-and-play devices, which can not only produce an operating bandwidth covering Taiwan digital TV channels (530-602MHz), but also the antenna of the present invention has a structure Simple, easy to make, light in appearance, easy to fold and store directly.

According to an embodiment of the present invention, the present invention discloses a digital TV receiving antenna suitable for plug-and-play devices, the digital TV receiving antenna includes: a first conductive part; and a second conductive part coupled to the first conductive part A conductive part has a resonant path, wherein the second conductive part can adjust its position relative to the first conductive part, and an effective length of the resonant path is greater than a linear distance between two ends of the resonant path.

The experimental results of the present invention show that an embodiment of the present invention can cover Taiwan digital TV channels (530-602 MHz), and the antenna radiation pattern and radiation efficiency can meet the practical application of digital TV receiving antennas.

In this design, we mainly use the meandering radiating metal arm (that is, the second conductive part in a meandering shape) to effectively achieve the effect of extending the current resonance path of the antenna, thereby achieving the purpose of reducing the size of the antenna , and then make the antenna of the present invention in use state the overall height of the antenna is greatly reduced, and the antenna of the present invention can still maintain good impedance bandwidth and radiation efficiency characteristics to meet the actual application requirements of Taiwan's digital TV channel (530-602MHz). Because the antenna of the present invention is simple in structure, easy to manufacture, and light in appearance, and the radiating metal sheet (that is, the first conductive part) has a complete shape and can be applied as a system ground plane of a plug-and-play device, the antenna of the present invention is quite suitable for application. Digital TV receiving antenna for plug-and-play devices.

In conjunction with the detailed description of the following drawings and embodiments, other objectives and advantages of the above-mentioned present invention will be described in detail below.

Description of drawings

Fig. 1 is a structural diagram of an embodiment of the antenna of the present invention.

FIG. 2 is a schematic diagram of the three-dimensional appearance structure of an embodiment of the antenna of the present invention in a non-use state.

FIG. 3 is an experimental measurement result of return loss of an embodiment of the antenna of the present invention.

FIG. 4 is a radiation pattern diagram at 570 MHz of an embodiment of the antenna of the present invention.

Fig. 5 is a diagram of antenna radiation efficiency of an embodiment of the antenna of the present invention.

Fig. 6 is a structural diagram of another embodiment of the antenna of the present invention.

Fig. 7 is a structural diagram of another embodiment of the antenna of the present invention.

Fig. 8 is a structural diagram of another embodiment of the antenna of the present invention.

Fig. 9 is a structural diagram of another embodiment of the antenna of the present invention.

Explanation of main component symbols

101, 401, 501, 601, 701 Digital TV receiving antenna

102, 602 Radiation metal sheet

103, 403, 503, 603, 703 Sinuous radiating metal arms

104, 604 Flexible insulating part

105 Dielectric substrate

201 Resonant path

202 endpoint

203 Signal feed point

204 short side

301 Zhangjiao

302 spacing

Detailed ways

Fig. 1 is a structural diagram of an embodiment 101 of the antenna of the present invention, as shown in the figure, the antenna 101 of the present invention is a digital TV receiving antenna that can be installed in a plug-and-play device (plug-and-play device), including : a radiating metal sheet (i.e. the first conducting portion) 102, a meandering radiating metal arm (i.e. the second conducting portion) 103, a flexible insulating portion (flexible insulating portion) 104 and a dielectric substrate 105 , wherein the radiating metal sheet 102 and the meandering radiating metal arm 103 are a pair of resonant radiators. The radiating metal plate 102 is substantially a rectangular radiating metal plate, which is the system ground of the plug-and-play device. The meandering radiating metal arm 103 is electrically coupled to the radiating metal sheet 102, and has a flare angle or angle 301 with the radiating metal sheet 102, and the resonance on the meandering radiating metal arm 103 One of the end points of the path (resonance path) 201 is the signal feed point (signalfeed point) 203 of the antenna 101, and there is a preset distance 302 between the signal feed point 203 and a short side 204 of the radiating metal sheet 102 . The opening angle 301 is between 45 degrees and 180 degrees, and the interval 302 of the preset distance is less than 5 mm. As shown in the figure, since the meandering radiating metal arm 103 is meandering, the effective length of the resonant path 201 of the meandering radiating metal arm 103 (the dotted line part shown in FIG. 1 ) is greater than that of the resonant path 201. The straight-line distance between the two ends 202, 203, in this way, the antenna 101 of the present invention can effectively achieve the effect of extending the antenna current resonance path 201 by means of the meandering radiation metal arm 103, thereby achieving the purpose of miniaturization, and then making the present invention The total antenna height of the inventive antenna 101 is greatly reduced when it is in use. In addition, the plug-and-play device may be an electronic device with a Universal Serial Bus interface (Universal Serial Bus interface, USB interface).

FIG. 2 is a schematic diagram of the three-dimensional appearance structure of the antenna 101 in the non-use state (ie, the folded state) of the present invention (when the opening angle 301 is zero degrees). Since the radiating metal sheet 102 and the meandering radiating metal arm 103 of the antenna 101 of the present invention are light and thin, when the antenna 101 of the present invention is applied as a digital TV receiving antenna of a plug-and-play device, it is easy to use when it is in use. Cooperate with various shapes and designs to achieve beautiful effects. In the non-use state, the antenna 101 of the present invention is also quite easy to fold and store directly.

Furthermore, as shown in FIG. 1 , the dielectric substrate 105 is coupled to the radiating metal sheet 102 via the flexible insulating part 104, so by bending the flexible insulating part 104, the dielectric substrate 105 (and the dielectric substrate The meandering radiating metal arm 103) on 105 can be adjusted relative to the radiating metal sheet 102, and, as shown in FIG. 2, when the meandering radiating metal arm 103 is adjusted to a retracted position (closed position) (that is, the position of the meandering radiating metal arm 103 in FIG. 2 ), the radiating metal sheet 102 and the meandering radiating metal arm 103 are substantially parallel.

Fig. 3 is the return loss (retum loss) experimental measurement result of an embodiment 101 of the antenna of the present invention, and the present embodiment selects the following dimensions to carry out the experimental measurement: the radiating metal sheet 102 is roughly in the shape of a rectangular sheet, and its length is 90mm, The width is 20mm. The meandering radiating metal arm 103 has a width of 4 mm except the endmost metal arm width of 7 mm, and the distance between adjacent metal arms is also 4 mm. The overall height of the meandering radiating metal arm 103 is 95 mm, and the overall width is 20 mm. The opening angle 301 between the meandering radiating metal arm 103 and the radiating metal sheet 102 is equal to ninety degrees. The preset distance 302 between the antenna signal feeding point 203 of the meandering radiating metal arm 103 and a short side 204 of the radiating metal sheet 102 is 2 mm. The meandering radiating metal arms 103 are formed on the surface of a dielectric substrate 105 with a thickness of 0.8 mm by printing or etching. Referring to Fig. 3, the vertical axis represents the return loss value, and the horizontal axis represents the operating frequency. It can be observed from the measurement results of the return loss that the antenna 101 of the present invention has high antenna return loss values in the Taiwan digital TV channel (530-602MHz). Generally speaking, this antenna return loss level can meet the actual application requirements of digital TV signal reception. If the angle 301 of the antenna 101 of the present invention is less than forty-five degrees, the return loss value of the antenna 101 of the present invention will deteriorate rapidly, thus causing the impedance bandwidth of the antenna 101 of the present invention to be reduced, and cannot fully satisfy Taiwan digital TV channels. (530-602MHz) bandwidth requirements. In addition, when the pitch 302 of the predetermined distance of the antenna 101 of the present invention is greater than 5 mm, the return loss value of the antenna 101 of the present invention will also deteriorate.

Fig. 4 is the radiation pattern diagram of an embodiment 101 of the antenna of the present invention at 570MHz. From the obtained results, the radiation pattern of the horizontal plane (x-y plane) is roughly an omnidirectional (omnidirectional) radiation pattern, which satisfies general figures. Application requirements for TV channels.

Fig. 5 is the antenna radiation efficiency diagram of an embodiment 101 of the antenna of the present invention in its operating frequency band. With reference to Fig. 5, the vertical axis represents the antenna radiation efficiency, and the horizontal axis represents the operating frequency. From the obtained results, the digital television channel in Taiwan (530 -602 MHz), the radiation efficiency of the antenna 101 is higher than 60%, generally speaking, it meets the actual application requirements of digital TV channel operation.

As can be seen from the above, the antenna 101 of the present invention operates within the frequency range of the Taiwan digital TV channel (530-602MHz). In addition, the antenna 101 of the present invention operates at the opening angle between the radiation metal sheet 102 and the meandering radiation metal arm 103 (that is, Angle) 301 is greater than forty-five degrees (that is, between forty-five degrees and one hundred and eighty degrees), and the antenna 101 of the present invention operates between the signal feeding point 203 and the radiating metal sheet 102 Under the condition that the shortest distance between them is less than 5mm.

6 and 7 are structural diagrams of other embodiments 401 and 501 of the antenna of the present invention. The shape of the radiating metal arm (that is, the second conductive part) 503 is different from that of the embodiment 101, but because it can also achieve the effect of extending the antenna current resonance path, it can also make the antennas 401 and 501 of the present invention smaller. the goal of. Except for the shape difference between the meandering radiating metal arm 403 and the meandering radiating metal arm 503 , other structures of the embodiment 401 and the embodiment 501 are the same as the embodiment 101 . Both the embodiment 401 and the embodiment 501 can also meet the impedance bandwidth and radiation efficiency requirements of Taiwan digital TV channels (530-602 MHz).

FIG. 8 is a structural diagram of another embodiment 601 of the antenna of the present invention. In this embodiment 601, except that the meandering radiating metal arm (that is, the second conductive part) 603 is formed by cutting a single metal sheet (therefore the antenna 601 does not include any Dielectric substrate), other structures are similar to the embodiment 101. The meandering radiating metal arm 603 can also effectively extend the antenna current resonance path, so that the antenna 601 of the present invention can be miniaturized. However, the embodiment 601 can also meet the impedance bandwidth and radiation efficiency requirements of Taiwan's digital TV channels (530-602 MHz). Furthermore, the meandering radiating metal arm 603 is an integrally formed radiating metal component (radiating metal component) and generally located on the same plane (plane), and the flexible insulating part 604 is connected to the radiating metal sheet 602 and Between the meandering radiating metal arms 603 , the position of the meandering radiating metal arms 603 can be adjusted relative to the radiating metal sheet 602 .

Fig. 9 is a structural diagram of another embodiment 701 of the antenna of the present invention, except that the meandering radiating metal arm (that is, the second conductive part) 703 of this embodiment 701 is instead made of radiating metal wire (so the antenna 701 is not Except for any dielectric substrate), other structures are the same as the previous embodiment 601. The meandering radiating metal arm 703 can also effectively extend the antenna current resonance path, so that the antenna 701 of the present invention can be miniaturized. The embodiment 701 can also meet the impedance bandwidth and radiation efficiency requirements of Taiwan's digital TV channels (530-602 MHz).

Based on the above description, the antenna of the present invention only extends the antenna current resonance path by meandering the radiating metal arm, that is, the antenna of the present invention can achieve the purpose of miniaturization, and the overall height of the antenna is greatly reduced, and the good performance can still be maintained. Impedance bandwidth and radiation efficiency to meet the actual application requirements of Taiwan's digital TV channels (530-602MHz). Therefore, the antenna of the present invention is quite suitable to be used as a digital TV receiving antenna for a plug-and-play device. Furthermore, the antenna of the present invention is simple in structure, light in appearance, easy to manufacture, low in manufacturing cost, and has clear functions. Therefore, the antenna of the present invention has high industrial application value and is sufficient to meet the scope of the invention.

The embodiments described in the above description are only to illustrate the principle and effect of the device of the present invention, but not to limit the present invention. Therefore, those skilled in the art can make modifications and changes to the above-mentioned embodiments without departing from the spirit of the present invention. The scope of rights of the present invention should be listed in the claims.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the present invention shall fall within the scope of the present invention.

Claims (13)

1. A digital TV receiving antenna suitable for plug-and-play devices, comprising: a first conductive portion; and a second conductive part coupled to the first conductive part and having a resonant path, wherein the second conductive part can be adjusted in position relative to the first conductive part, and an effective length of the resonant path is greater than that of the resonant path A straight line distance between two points. 2. The digital TV receiving antenna according to claim 1, wherein the first conductive part and the second conductive part are a pair of resonant radiators. 3. The digital TV receiving antenna according to claim 1, wherein the second conductive portion is meander-shaped. 4. The digital television receiving antenna according to claim 1, further comprising: A flexible insulating part is connected between the first conductive part and the second conductive part, so that the second conductive part can adjust its position relative to the first conductive part. 5. The digital television receiving antenna according to claim 1, further comprising: a substrate, coupled to the first conductive portion and capable of adjusting its position relative to the first conductive portion; Wherein, the second conductive portion is formed on a surface of the substrate through printing technology or etching technology. 6. The digital TV receiving antenna according to claim 1, wherein the first conductive part is a rectangular radiating metal plate. 7. The digital TV receiving antenna according to claim 1, wherein the second conductive parts are substantially located on the same plane. 8. The digital television receiving antenna according to claim 1, wherein the second conductive portion is an integrally formed radiating metal member. 9. The digital TV receiving antenna according to claim 8, wherein the second conductive part is a radiating metal wire. 10. The digital TV receiving antenna according to claim 1, wherein when the second conductive part is adjusted to a retracted position, the first conductive part and the second conductive part are substantially parallel. 11. The digital TV receiving antenna according to claim 1, wherein the digital TV receiving antenna operates under the condition that an included angle between the first conductive portion and the second conductive portion is greater than 45 degrees. 12. The digital TV receiving antenna according to claim 1, wherein one of the two ends of the resonant path is a signal feeding point of the digital TV receiving antenna, and the digital TV receiving antenna operates at the signal feeding point Under the condition that a shortest distance between the point and the first conductive part is less than 5 mm. 13. The digital TV receiving antenna according to claim 1, wherein the digital TV receiving antenna is installed in a plug-and-play device, and the first conductive part is a system ground plane of the plug-and-play device.

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