1353685 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a digital television antenna. Digital TV antennas, especially a mobile device [Prior Art] In the era of rapid communication, TV has become an indispensable role for people to receive news, entertainment and entertainment. With the development of wireless communication, the analogy method transmits the signal, and then the analog TV will appear as the king. The signal transmission process is not only susceptible to noise interference, but also reduces the clarity and stability of the picture. a lot of. In contrast, the signal transmitted in digital mode is not only better in enamel appearance: it is stable, and it can provide further multimedia services. Therefore, it has become inevitable that Zhusi will replace the traditional analog TV system. The trend, the position! The function of the mobile device is expected to have a relative I ^ \ ^ to achieve this purpose, how to design a structural bar, thin and easy to integrate into the mobile device 4 need to solve a large problem. The rear view antenna becomes the Taiwan Patent Publication No. M325,617. The ultra-wideband digital line reveals a digital TV antenna. Although the extension method ί shortens the height of the exposed antenna, it is still 夕 = , , ' Does not meet the current trend of antenna built-in (2) mobile digital TV receiver antenna pole antenna with a variable capacitor approach to achieve coverage:: Electricity::: 5 1353685
The demand for frequency bands, however, has the disadvantage that 兮MA 需 requires active circuits for the variable capacitors:: electrical valleys, which increase the manufacturing cost, and on the other hand increase the power consumption'. The long-term (4) magnetic current low production to solve the above problems, we propose a mobile device digital TV antenna design 'which can generate broadband operating bandwidth' and then cover Taiwan's view == 2MHZ) and US regulations ~ 862 MHz) Digital TV band. At the same time, the antenna of the present invention is designed and designed to be easy to use, and is quite suitable for use in mobile devices. SUMMARY OF THE INVENTION As described above, the object of the present invention is to provide a digital television antenna design suitable for mobile devices. It can cover digital television bands in Taiwan and digital television bands in Wu and Europe. A mobile device digital television antenna comprises: a system substrate which can be a mobile device; a connection:: a reverse: the ground can be formed on the surface of the dielectric substrate by using printing or etching technology. a feed into the metal portion 'the feed: the genus can make = brush or etch technology formed on one surface of the dielectric substrate, yT τ- ι_ ^ m , , 5 Hai ground plane: mutual eyebrows 1 is connected to a signal source, and the other end is an open circuit... The light-emitting metal and the first radiating metal portion can be formed on the surface of the dielectric substrate, and the ground plane is not =, one end thereof and the feed metal The portion has a first specific spacing, and the other end is 6 I353685 open circuit; and a second radiating metal portion supported by a supporting medium made of air, a glass substrate, a plastic material or a ceramic material. Located above the first light-emitting metal portion and having a second specific spacing (generally at least greater than 2 mm) to reduce the interaction between the first radiating metal portion and the second radiating metal portion ), the second The radiant metal portion may be formed on the supporting medium by stamping or cutting using a metal sheet by printing, surname or splashing technique, and then attached to the bud medium, one end (four) - the connecting metal wire is electrically connected to the supporting = On the surface of the substrate - a shorted metal line that can be formed on the dielectric substrate using f7 brushing or etching techniques, at least at its length, and the other end of which is electrically connected to the shorting point of the ground plane. In the antenna of the present invention, the first radiating metal portion is provided by the first characteristic distance (generally should be less than 3 mm to provide sufficient electromagnetic surface area).
Si gold ^: the wire resonates with its quarter-wavelength mode (operation, with = 〇〇mhz), and the second light-emitting metal portion effectively increases the length of the resonance path by the short-circuited metal wire, and resonates One quarter of it operates at approximately 500 MHz). If; ^ w古## A skin long 杈~, (-the method of feeding into the h, will cause the current distribution of the 'th' in the band of about 8 〇〇MHz to be less = line in this band The impedance changes drastically, so it can't cover the width of the rut. For the second light metal part, the ugly metal wire will cause the second light person to be 'unable to produce' - operate at about the antenna operation. The Um, which is used by the people, has caused the demand for '5 sets of TVs (4) and 7 1353685 digital TV operating bands of the US and Europe. Therefore, in this invention, it is proposed to use the electric shaft feed in the -_ metal part. The squares of the two squares are evenly distributed, and the high-frequency operating frequency band is increased. The two-incident incident metal portion is connected to a short-circuited gold gas, and the second light-operating frequency band can be used to reduce the low frequency in a limited space: In addition, the digital television band of the United States and the European standard digital television are implemented. [Embodiment] FIG. 1 is a structural diagram of a first embodiment of the antenna of the present invention, including a dielectric substrate η, a ground plane 12, located in the medium. On one surface of the substrate u, with a short circuit point 121 feeding gold The pedestal portion 14 is located on a surface of the dielectric substrate 11 and does not overlap with the ground plane 12, and has one end-signal source 18 and an open end at the other end; a first urging metal portion 15 is located on the dielectric substrate 11. On the surface, the ground plane 12 does not overlap each other, one end of the feed metal portion 14 has a first specific spacing 141, and the other end is an open circuit; and - the second light metal portion 17, supported by the medium 13 is supported above the first light-emitting metal portion 15 and has a second specific spacing 171 with the first light-emitting metal portion 15, and its -terminal (four)-connection metal wire 172 is electrically connected to the dielectric substrate. One of the surfaces 21 is short-circuited with a metal wire 16'. The short-circuited metal wire 16 has a length of at least 2 mm, and the other end thereof is electrically connected to the short-circuit point 121 of the ground plane 12. FIG. 2 is an embodiment 1 of the antenna of the present invention. Return loss map. In the real 8 example, the following dimensions were selected for experiment: a medium of 135 mm, a width of about length, a width of about ^ a ground plane 12, and a length of about 12 〇 is a degree. , located at a short-circuit point 121; on the surface of A, with .M gold邛14, its length is about 7〇mm, width ^1mm 'on the surface of the dielectric substrate", the grounding: 12 do not overlap each other, the hair is / /, the grounding surface; - the first, eight "connection To a signal source 18, the other end is an open-circuited metal part 15 having a length of about 14 〇 设计 design, the width of the end is about - and the other end is not located at the interface. 10mm, on one surface of the earthworm, the ground surface 12 and the grounding surface 12 are not mutually contiguous. The one end of the ground surface 12 and the feeding metal portion 14 have a first-specific spacing (4), the spacing (4) is about 1 mm, and the other end is an open circuit; a second;; '邛17, which has a length of about 80 mm and a width of about 15 mm, is supported by the standard medium 13'. The length of the medium 13 is about 8 〇, the degree of completion is about 15 mm, and the height is about 4_, located above the first light-emitting metal portion ^ and having a second specific spacing Η! with the first radiant metal portion 5, the second specific spacing 171 is about 4 mm, one end of which is connected via a connecting metal The wire 172 is electrically connected to a shorted metal wire 16 on one of the surfaces of the dielectric substrate u, the connecting wire 172 having a length of about g4 mm A width of about ^ mm, 16 New Road, te length of the metal wire is about 35 mm, a width of about Shu, and the other end electrically connected to the ground plane 12 of the short-circuit point 121. From the experimental results obtained, the first radiation metal is defined under the definition of 3 dB return loss. The resonant mode 21 of the 协同 cooperates with the resonant mode 22 of the second light-emitting metal part, which is sufficient to cover the digital television band of Taiwan and the US and European digital television bands. 9 1353685 Fig. 3 is a diagram showing the simulated light-emission efficiency of the antenna of the present invention. = Example: Select the size as described above for simulation. In Taiwan's digital video and audio regulations, the European standard digital TV band, the sky shooting efficiency is about 3 〇 10 mesh ^ Therefore, the antenna of the present invention not only conforms to the built-in and reduced antenna =:, but also meets the digital TV antenna Light shot efficiency requirements, Xiang Tian k. Applied to mobile devices to receive digital televisions.
.One:! The figure is a structural diagram of another embodiment 4 of the antenna of the present invention, comprising a b-substrate 41; a ground plane 42 on the surface of one of the dielectric substrates Having a short-circuit point 421; - feeding 厶 邶 μ. The metal inlet portion 44 is located on the surface of the medium and does not overlap with the ground plane 42. One end of the metal portion 44 is connected to the L source 48 and the other end is an open circuit. A first radiating metal portion 45 is formed on the dielectric substrate 41. - on the surface, the ground plane 42 does not overlap each other. The second end has a first specific spacing 々々I with the feed metal portion 44, and the other is an open circuit 'and a second radiating metal portion 47' is supported by a support The medium is placed above the fourth metal portion 45 and is electrically connected to the surface of one of the dielectric substrates 41 via the first radiation. One of the short-circuited metal wires 46 has a length of at least 2, and the other end thereof is connected to the short-circuit point 42ι of the ground plane 42. The difference between the embodiment 4 and the implementation is that the feed metal portion 44 of the embodiment 4 and the first radiation belong to different surfaces of the dielectric substrate 41, and the short-circuit gold/the ground plane 42 is located on the dielectric substrate 41. Same as - on the surface. The *solids her case's operation principle is the same, and the fourth embodiment can also obtain similar results as the first embodiment, all of which can be π strike A, attack. White 盍 对 对 对 对 对 电视 电视 电视 电视 电视 对 对 对 对 对 对The antenna structure of the TV band is chosen. (V) Seeking to be able to select according to the requirements of the present invention. The embodiments described in the above description are merely illustrative of the principles of the invention and the invention. Therefore, those skilled in the art can modify and change the above embodiments in the spirit of the two days. The right scope of the present invention should be as set forth in the scope of the patent application to be described later. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view of an antenna according to an embodiment of 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. [Explanation of main component symbols] .1: Antenna of the present invention, an embodiment n, 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 spacing 15, 45: first radiating metal portion 16, 46: shorting metal line 13-53685 161, 461: connecting point 17.47: second radiating metal portion 171, 471: second specific spacing 172, 472: connecting metal line 18.48: signal Source 21 · Southern Frequency Resonant Band 22: Low Frequency Resonant Band 4: Another Embodiment of Antenna of the Present Invention