TW200952252A - A mobile device digital television antenna - Google Patents

A mobile device digital television antenna Download PDF

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Publication number
TW200952252A
TW200952252A TW97121016A TW97121016A TW200952252A TW 200952252 A TW200952252 A TW 200952252A TW 97121016 A TW97121016 A TW 97121016A TW 97121016 A TW97121016 A TW 97121016A TW 200952252 A TW200952252 A TW 200952252A
Authority
TW
Taiwan
Prior art keywords
metal portion
dielectric substrate
antenna
end
item
Prior art date
Application number
TW97121016A
Other languages
Chinese (zh)
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TWI353685B (en
Inventor
Kin-Lu Wong
Chih-Hung Huang
Ting-Wei Kang
Original Assignee
Univ Nat Sun Yat Sen
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Publication date
Application filed by Univ Nat Sun Yat Sen filed Critical Univ Nat Sun Yat Sen
Priority to TW97121016A priority Critical patent/TWI353685B/en
Publication of TW200952252A publication Critical patent/TW200952252A/en
Application granted granted Critical
Publication of TWI353685B publication Critical patent/TWI353685B/en

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Abstract

The present invention is related to a mobile device digital television antenna. The antenna comprises a dielectric substrate, a ground plane, a feeding metal portion, a first radiating metal portion, and a second radiating metal portion. The ground plane is located on the dielectric substrate and has a shorting point. The feeding metal portion and the first radiating metal portion are located on the dielectric substrate, without overlapping the ground plane. One end of the feeding metal portion is connected to a source. The other end of the feeding metal portion is electrically open. One end of the first radiating metal portion has a first predefined distance from the feeding metal portion. The other end of the first radiating metal portion is electrically open. The second radiating metal portion is supported by a dielectric supporter and is spaced with a second predefined distance above the first radiating metal portion. One end of the second radiating metal portion is connected through a connecting metal line to a shorting metal line on the dielectric substrate. The other end of the shorting metal line is connected to the shorting point of the ground plane.

Description

200952252 IX. INSTRUCTIONS: TECHNICAL FIELD OF THE INVENTION The present invention relates to a digital television antenna, and more particularly to a mobile-mounted digital television antenna. [Prior Art] In an era of rapid information dissemination, television has become an indispensable role for people to receive news, entertainment, leisure and information. With the development of wireless communication, TV programs transmit analog signals in analogy, and then display their images via analog TV. The signal transmission process is not only susceptible to noise interference, but also the clarity and stability of the presentation. So it is much lower. In contrast, the digital signal transmitted by the digital system has not only better image quality, but also stable signal, and can provide further multimedia services. Therefore, replacing the traditional analog TV system with a digital television system has become The inevitable trend, and the mobile device combined with the digital TV function can be expected to have a considerable 10% market opportunity. In order to achieve this goal, how to design a digital TV antenna with simple structure, light weight and easy integration into mobile devices has become a major problem to be solved. "Taiwan Patent Bulletin No. M325,617" ultra-wideband digital TV antenna, which discloses a digital TV antenna. Although the antenna structure has been shortened by the use of a squatting method, it is still an exposed type. The antenna does not conform to the current trend of antennas. Taiwan Patent Publication No. M305,968 "Operational Digital TV Receiver Antenna" uses a unipolar antenna with a variable capacitor to achieve the requirement of covering digital TV reception 5 200952252 band. However, its disadvantage is The variable capacitor requires an active circuit to control the capacitance value, and the manufacturing cost is increased, and the power consumption is increased on the other hand, and the operation time of the action device is reduced, which does not meet the current low production cost, long device usage time. In order to solve the above problems, we propose a kind of mobile device digital TV antenna - again. Ten can generate broadband operating bandwidth, which in turn covers Taiwan digital TV band (53G ~ 602 MHz) and US regulations (47 〇 ~嶋MHz), European standard (47〇©~, 862 MHZ) digital TV band. At the same time, the antenna of the present invention is designed and built easily, and is quite suitable for use in mobile devices. The purpose of the present invention is to provide a digital television antenna design suitable for mobile devices, which can cover digital television bands in Taiwan and US regulations, Europe. Digital television band m. A mobile device digital television antenna comprising: a dielectric substrate. The dielectric substrate can be a system board of a mobile device; - grounding, the ground can be formed on the medium using printing or engraving techniques On the surface of the substrate - having a - short-circuit point · a feeding metal portion, the feeding metal portion can be brushed or (4) formed on the surface of the dielectric substrate, and the grounding surface does not overlap each other 'its-end connection To a signal source, the other end is an open circuit; a first-light metal 胄 'the first - Korean metal portion can be printed or formed on the surface of the dielectric substrate, and the ground plane does not overlap each other = - the end and the donor metal portion have a - first - spacing, the other end is 6 200952252 open circuit; and a second radiating metal portion ' is supported by a supporting medium, which can be air, glass substrate, a plastic material or a ceramic material located above the first radiating metal portion and having a first specific spacing from the first radiating metal portion (generally at least greater than 2 mm to reduce the first radiating metal portion and the second portion) The second radiant metal may be formed on the support medium by printing, etching or sputtering techniques, and may be formed by stamping or cutting a metal sheet, and then attached to the support struts" Qualitatively, one end thereof is electrically connected to a short-circuited metal line on a surface of one of the dielectric substrates via a connecting metal wire, and the short-circuited metal wire can be formed on the dielectric substrate by using a printing or etching technique, and the length thereof is at least 2 mm. The other end is electrically connected to the short-circuit point of the ground plane. In the antenna of the present invention, the first radiating metal portion is excited by the first metal, the pitch (which should be less than 3 mm to provide sufficient electromagnetic interference) The quarter-wavelength mode (1) is ❹; 20 MHz), and the second radiating metal portion increases the length of the resonant path by the short-circuit metal line effect, and resonances its quarter-wavelength mode (I Finer than about 5GGMHZ). ^In the direct township approach, this will result in the average: the current distribution of the injection of the f-portion in the band of about 800 MHz is less than I ♦ so that the impedance of the antenna in this band changes drastically, so it cannot cover the operation of r bandwidth. In addition, if the second radiating metal portion is not connected to the line of words, the resonant mode frequency of the second radiating metal portion is excessively generated by the J method, and the resonant mode is operated at about 5 GG MHz, thereby causing The frequency band cannot meet the requirements of Taiwan's digital TV frequency band and the German and European regulations 7 200952252 digital TV operating band. In the antenna of the invention, the current distribution is uniform, and the high-frequency ## is fed in, so that the feeding/injecting metal portion is connected to a short ^ and in the first - Wheel: The operating frequency band can effectively reduce the low frequency in a limited space, thus covering the Taiwan digital video ^ (four) state operation. ^And the US regulations, European standard digital TV band ® [implementation] Medium = original! The structure diagram of the first embodiment of the present invention includes a board 11 and a ground plane 12 on the surface of the medium such as: a short circuit point 121; a feed metal portion 14 on the dielectric substrate L ® is not overlapped with the ground plane 12, the end is connected to the - signal source 18, and the other end is an open circuit; a first radiating metal portion 15 is located on the surface of the dielectric substrate 11, and the ground plane 12 is not Overlap each other, and one end has a first specific spacing 与 with the feeding metal portion 14, and the other end is an open circuit ' & a radiant metal portion 17, supported by a undulating medium" Above the metal portion 15 and having a second specific spacing 171 from the first radiating metal crucible 15, one end of which is electrically connected via a connecting metal wire 2 to a short-circuited metal wire 16 on one of the surfaces of the dielectric substrate The shorted wire 16 is at least 20 mm in length and the other end is electrically connected to the shorting point 121 of the ground plane 12. Fig. 2 is a diagram showing the return loss of the antenna of the first embodiment of the present invention. In the actual example, the following dimensions were selected for experiment: a dielectric substrate n, a long-term production of 35 coffee, a width of about 80 mm, a ground (four), a length of about 12 inches, a width of about 80 mm, located on the dielectric substrate 11 a surface having a short-circuit point 121; a metal-infeeding portion 14 having a length of about 7 Å and a width of about 1 mm, located on a surface of the dielectric substrate n and not overlapping the ground plane 12 One end is connected to a signal source 18, and the other end, a first radiating metal portion 15' has a length of about 14 mm, which is one; the equal width design has a width of about 1.5 mm at one end and a width at the other end. For, ❹

200952252 is located on one surface of the dielectric substrate ,, and the ground plane i2 does not overlap each other*, and one end thereof has a first specific spacing 与 with the feeding metal portion 4, and the first specific spacing 141 is about 1 Mm, the other end is an open circuit; and a second radiating metal portion 17, which has a length of about 80 mm and a width of about 15 mm, is supported by a supporting medium 13 having a length of about 8 mm and a width of about 15 And a height of about 4 mm, located above the first radiating metal portion 15, and having a second specific spacing 171 from the first radiating metal portion 15, the second specific spacing 171 being about 4 mm, one end of which is via a The connection metal wire port 2 is electrically connected to a short-circuit metal wire 16 on a surface of the dielectric substrate n. The connection metal wire 172 has a length of about 4 mm and a width of about 1. The short-circuit metal wire 16 has a length of about 35 mm and a width. About, the other end is electrically connected to the short-circuit point 121 of the ground plane 12. From the experimental result obtained, under the definition of 3dB return loss, the resonant mode 21 of the first radiating metal portion cooperates with the resonant mode 22 of the second radiating metal portion, which is sufficient to cover the digital television band of Taiwan and the US regulations and Europe. Digital TV band. 9 200952252 Figure 3 is a graph showing the simulated radiation efficiency of an embodiment of the antenna of the present invention. In the example, the simulation was performed by selecting the dimensions as described above. In the digital TV band in Taiwan and the digital TV band in the US and European regulations, the antenna radiation efficiency is about 3〇~85%. Therefore, the antenna of the present invention not only conforms to the built-in and reduced antenna: the design goal, but also conforms to the digital TV antenna. The radiation efficiency requirement is quite suitable for use in mobile devices to receive digital television. Figure 4 is a structural view of another embodiment 4 of the antenna of the present invention, comprising: a dielectric substrate 41; a ground plane 42 on a surface of the dielectric substrate 41 having a short-circuit point 421; - feeding the metal portion 44, located on a surface of the dielectric substrate 41, and the ground plane 42 does not overlap each other, one end of which is connected to a signal source 48, and the other end is an open circuit; a first radiating metal portion 45 is located in the dielectric substrate 41 On the surface, the ground plane 42 does not overlap with each other, and one end thereof has a first specific spacing 441 with the feeding metal portion 44 and the other end is an open circuit; and a second radiating metal portion 47 is supported by a supporting medium. Located above the first radiating metal portion 45 and having a second specific spacing 471 from the first radiating metal portion 45, one end of which is electrically connected to a surface of the dielectric substrate 41 via a connecting metal wire 472. A shorted metal line 16 having a length of at least 2〇〇1111 and the other end electrically connected to the shorting point 421 of the ground plane 42. The difference between the embodiment 4 and the embodiment 1 is that the feed metal portion 44 of the embodiment 4 and the first radiation metal portion 45 are located on different surfaces of the dielectric substrate 41, and the short-circuit metal line 46 is located at the ground plane 42. The dielectric substrate 41 is on the same surface. The two embodiments have the same operation principle, and the fourth embodiment can also obtain similar results as the implementation of the example 200952252, which can cover the operating band requirements of the Taiwan digital TV band and the US and European digital TV bands. The actual demand selects a more appropriate antenna structure. The embodiments described in the above description are merely illustrative of the principles of the invention and the <RTIgt; Therefore, those skilled in the art can make modifications and changes to the above embodiments without departing from the spirit of the invention. The scope of the invention should be as set forth in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing an embodiment of an antenna according to the present invention. Figure 2 is a graph showing the measured return loss for an embodiment of the antenna of the present invention. Figure 3 is a graph showing the simulated radiation efficiency of an embodiment of the antenna of the present invention. Fig. 4 is a structural view showing another embodiment of the antenna of the present invention.

[Main component symbol description] 1 Antenna embodiment of the present invention 11, 41 dielectric substrate 12, 42 ground plane 121, 421 short-circuit point 13, 43 support medium 14, 44 feed metal portion 141, 441 first specific pitch 15, 45 first radiating metal Portion 16, 46: shorted metal wire 200952252 161,461 connection point 17, 47 second radiating metal portion 171, 471 second specific spacing: 172, 472 connecting metal wire 18, 48 signal source 21 • south frequency resonant frequency band 22 • low frequency resonant frequency band 4: the present invention Antenna - Other Embodiments ❹ 12

Claims (1)

  1. 200952252 X. Patent application scope: 1. A mobile device digital television antenna comprising: a dielectric substrate; a ground plane on a surface of the dielectric substrate having a short circuit point; a feed metal portion located on the dielectric substrate On one surface, the ground planes do not overlap each other, one end of which is connected to a signal source, and the other end is an open circuit;
    2. a first radiant metal portion on a surface of the dielectric substrate, which does not overlap with the ground plane, one end of which has a first specific spacing from the feed metal portion, and the other end is an open circuit; a second radiating metal portion supported by a supporting medium, located above the first radiating metal portion, and having a second specific spacing from the first radiating metal portion, one end of which is electrically connected to the second via a connecting metal wire One of the surfaces of the dielectric substrate is short-circuited with a metal wire having a length of at least 2 mm and the other end of the dielectric substrate is electrically connected to a short-circuit point of the ground plane. The antenna of claim 1, wherein the dielectric substrate is a system board of the action. The antenna according to Item 1, wherein the supporting medium is made of an air fiberglass substrate, a plastic material or a ceramic material. The antenna of item 1, wherein the ground plane is formed on the dielectric substrate by printing or etching. The antenna according to item 1, wherein the feeding metal portion and the first spoke 13 5. 200952252 6. 8. 9. Ο 10. 11. 12. The ejector metal portion is located on the same surface of the dielectric substrate . The antenna of item 1, wherein the feed metal portion and the first radiating metal portion are on different surfaces of the dielectric substrate. The antenna of claim 1, wherein the first specific spacing is less than 3 mm. The antenna of claim 1, wherein the second specific spacing is greater than 2 legs: the antenna of item 1 wherein the feeding The metal inlet portion and the first spoke and metal portion are formed on the dielectric substrate by printing or etching techniques. The antenna of item 1 wherein the second radiant metal portion is formed on the support medium by printing, engraving or splashing techniques. The antenna of the item, wherein the second light metal portion is stamped or cut from a metal sheet. The antenna of item 1, wherein the short-circuit engraving technique is formed on the dielectric substrate. , " ‘, brush or 14
TW97121016A 2008-06-06 2008-06-06 A mobile device digital television antenna TWI353685B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW97121016A TWI353685B (en) 2008-06-06 2008-06-06 A mobile device digital television antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW97121016A TWI353685B (en) 2008-06-06 2008-06-06 A mobile device digital television antenna

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TW200952252A true TW200952252A (en) 2009-12-16
TWI353685B TWI353685B (en) 2011-12-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI556506B (en) * 2012-08-29 2016-11-01 宏達國際電子股份有限公司 Mobile device
US10027025B2 (en) 2012-08-29 2018-07-17 Htc Corporation Mobile device and antenna structure therein

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI556506B (en) * 2012-08-29 2016-11-01 宏達國際電子股份有限公司 Mobile device
US10003121B2 (en) 2012-08-29 2018-06-19 Htc Corporation Mobile device and antenna structure
US10027025B2 (en) 2012-08-29 2018-07-17 Htc Corporation Mobile device and antenna structure therein
US10553932B2 (en) 2012-08-29 2020-02-04 Htc Corporation Mobile device and antenna structure

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Publication number Publication date
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