TWI334671B - Multi-band antenna - Google Patents

Description

1334671 IX. Description of the invention: 'The technical field to which the invention pertains' The present invention relates to a multi-band antenna, and more particularly to a multi-band antenna for use in a portable electronic device. [Prior Art] In recent years, with the advancement of wireless communication technology and the close integration with international networks, wireless communication applications have experienced explosive growth. In the current daily life, wireless communication related products have been seen everywhere, for example, mobile phone, global positioning system (GPS), wireless local-area network (WLAN), Bluetooth products, laptops with wireless communication capabilities, and more.

All wireless communication systems lack antennas. Antennas are wireless communication system portals and the antenna design will directly affect the communication quality. In different regions of the world, the wireless communication standards are different, that is, the wireless communication frequency range is different. Therefore, in order to adapt the antenna as much as possible to different wireless communication standards in different regions, it is necessary to increase the antenna frequency band as much as possible. In order to match the antenna with the portable electronic device, it is necessary to reduce the size of the antenna as much as possible to meet the requirements of miniaturization and slimming of the portable electronic device. Reducing the size of the antenna will result in attenuation of the antenna band. Related antenna

See IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 53, NO. 1, JANUARY 2005 u Dual-Band Flat-Plate Antenna With a Shorted Parasitic

Element for Laptop Applications” [Explanation] A multi-band antenna has a multi-band antenna, and the multi-band antenna has a received signal bandwidth. - Short-circuit bar, a feed point, 2 knives t 'I know the light-shooting branch, the slap-in blade, the short-circuit bar and the feed point are all set at a first level ^ (4) is connected to the grounding portion, the connection The portion connects the H short radiation branch and the short circuit bar to the long radiation, and the connection portion constitutes an inverted F-shaped structure to receive the low frequency band signal, the two-round branch, the short-circuit bar and the connection portion constitute another inverted structure, The frequency band signal 'the multi-band antenna further includes a long parasitic strip and a short = sliver'. The long parasitic strip and the short parasitic strip are disposed on the second plane, and the first plane is parallel to the first plane, the long parasitic a strip and the short parasitic strip are respectively connected to the ground portion, the long parasitic strip cooperates with the long radiating branch to expand a bandwidth of the multi-band antenna to receive a low-band signal, and the short parasitic strip cooperates with the short-radiation branch Extend the multi-band The antenna receives the bandwidth of the high frequency band signal. Compared with the prior art, the multi-band antenna cooperates with a long parasitic strip and a long light-emitting branch to extend the bandwidth of the multi-band antenna to receive the low-band signal to enhance its ability to receive low-band signals. The parasitic strip cooperates with the short-radiation branch to extend the bandwidth of the multi-band antenna to receive the high-band signal to enhance its ability to receive the high-band signal. Therefore, the multi-band antenna has a wider receiving range and a stronger receiving capability. L33467l [Embodiment] Hereinafter, embodiments of the present invention will be further described in detail in conjunction with the drawings. Referring to FIG. 1 to FIG. 2, a multi-band antenna is provided according to an embodiment of the present invention. The multi-band antenna includes a long radiating branch 110 (longer radiating

Branch), a short radiating branch 120, a shorting strip 130, a feed position 170, a long parasitic strip 140, a short parasitic strip 150 (shorter parasitic strip), a ground portion 160, a connecting portion 180. The long radiation branch 110, the short radiation branch 120 and the short circuit strip 13 are all disposed on a first plane. The long parasitic strip 140 and the short parasitic strip 15 are both disposed on a second plane, and the first plane is parallel to the second plane. The connecting portion 180 has the long radiating branch 110, and the short radiating branch 12〇 And the shorting bars 130 are connected together. Referring to FIG. 3 and FIG. 4 , the long radiation branch 110 is an approximately c-shaped structure, and includes a first level portion 111 , a second level portion 112 , and a first level portion 111 and the second level. The vertical portion 113 of the portion 112. The width of the first level portion 111 is about 1.5 mm, the length of the second level portion 112 is about 1.5 mm, and the distance between the first level portion ι and the second level portion 112 is about 2.5. Mm. The vertical portion 113 has a length of about 5.6 mm. The short radiating branch 120 is a strip-like structure disposed between the first level portion 111 and the second level portion 112 of the long radiating branch 110. The short radiation branch 120 has a width of about 1.5 mm, and the distance between the short-handed 13364671 shot branch 120 and the first level portion 111 is about 0.5 mm, and the distance from the second level portion 112 is also about 0.5 mm. The short radiating branch 120 is spaced from the vertical portion 113 of the long radiating branch 110 by a distance of about 12.4 mm.

The shorting bar 130 includes a first portion 131 and a second portion 132 extending from the first portion 131. The first portion 131 is wider than the second portion 132. Preferably, the first portion 131 has a length of about 8 mm and a width of about 2 mm. The second portion has a length of about 38.8 mm and a width of about 1 mm. And the upper surface of the second portion 132 is at the same level as the upper surface of the first portion 131. The grounding portion 160 includes a first vertical surface 161, a second vertical surface 162, and a horizontal plane 163 connecting the first vertical surface 161 and the second vertical surface 162. The surface 161 is surrounded by the second vertical surface 162 and the horizontal surface 163. The first vertical surface 161, the second vertical surface 162 and the horizontal surface 163 may each be made of metal. The lower surface of the first portion 131 of the short strip 130 is attached to the horizontal surface 163, and the lower surface of the second portion 132 of the shorting strip 130 is not in contact with the horizontal surface 163, which is about 1 mm from the horizontal surface 163. The connecting portion 180 respectively connects the long radiation branch 110, the short radiation branch 120 and the short circuit strip 130 together. Specifically, the connecting portion 180 is respectively away from the other end portion of the first level portion 111 of the long radiation branch 110 away from the vertical portion 113 thereof, and the short radiating branch 120 is away from the other end portion of the vertical portion 113 of the long radiating branch 110. And the second portion 132 of the shorting bar 130 is connected away from the other end of the first portion 131 thereof. The length of the joint 1334671 is about 3 mm, and the distance from the other end of the second level portion 112 of the long radiating branch 110 away from the vertical portion 113 is about 9.6 mm. The feed point 170 is disposed at an end of the connecting portion 180 with respect to the second portion 132 of the shorting bar " The long radiating branch 110, the shorting bar 130 and the connecting portion 180 constitute an inverted F antenna structure for receiving a low frequency band signal, specifically, a signal in a GSM850 (824-894 MHz) frequency band. The short radiating branch 120, the shorting bar and the connecting portion 180 constitute another inverted F-shaped antenna structure, which uses 9 to receive the high frequency band signal, specifically, the signal in the DCS (1710-1880 MHz) frequency band.

Referring to Figures 5 and 6, the long parasitic strip 140 is disposed on a second plane opposite the long radiating branch 110, the short radiating branch 120 and the first plane in which the short strip 130 is located. The long parasitic strip 140 is an approximately C-shaped structure including a first leveling portion 141, a second leveling portion 142 and a vertical portion 143 connecting the first leveling portion 141 and the second leveling portion 142. The first level portion 141 has a width of about 1.5 mm and a length of about 31.1 mm. The second level portion 142 has a width of about 1.5 mm and a length of about 19.7 mm, and the distance between the first level 7jc portion 141 and the second level portion 142 is about 5.3 mm. The vertical portion 143 has a length of about 6.5 mm. The first level portion 141 is connected to the second vertical surface 162 of the ground portion 160 away from one end of the vertical portion 143. The short parasitic strip 150 is disposed on a second plane relative to the long radiating branch 110, the short radiating branch 120 and the first plane in which the shorting strip 130 is located. The short parasitic strip 150 is also an approximately C-shaped structure, and includes a 11 1334671 first level portion 151, a second level portion 152 and a vertical portion connecting the first level portion 151 and the second level portion 152. 153. The first level portion 151 has a width of about 1.5 mm and a length of about 17.4 mm. The second level portion 152 has a width of about 1.5 mm and a length of about 2.9 mm, and the distance between the first level portion 151 and the second level portion 152 is about 2.9 mm. The vertical portion 153 has a length of about 2 mm. And the first level portion 151 is connected to the first vertical surface 161 of the ground portion 160 away from one end of the vertical portion 153.

The long parasitic strip 140 is configured to receive a low frequency band signal in a GSM 900 (890-960 MHz) frequency band. The long parasitic strip 140 cooperates with the long radiating branch 110 to extend the bandwidth of the multi-band antenna receiving the low frequency band signal (ie, coverage). GSM850 and GSM900) enhance the ability of the multi-band antenna to receive low-band signals so that the multi-band antenna can receive low-band signals in the GSM850 and GSM900 bands. The short parasitic strip 150 is configured to receive a high frequency band signal in a PCS (1850-1990 MHz) frequency band, and the short parasitic strip 150 cooperates with the short radiation branch 120 to extend the bandwidth of the multi-band antenna to receive the high frequency band signal (ie, Covering the DSC and PCS) to enhance the ability of the multi-band antenna to receive high-band signals, such that the multi-band antenna can receive high-band signals in the DCS and PCS bands. Compared with the prior art, the multi-band antenna of the embodiment of the present invention uses the long parasitic strip 140 to enhance its ability to receive low-band signals, and the short parasitic strip 150 is used to enhance its ability to receive high-band signals. The multi-band antenna has a wider receiving range and a stronger receiving capability, and the long parasitic strip 140 of the multi-band antenna, the short parasitic strip 150 and the short-circuit strip 130 are directly connected to the 12 UJ4671_ground portion (10). Multi-band antennas are smaller in size and more suitable for portable electronic devices. In summary, the present invention has indeed met the requirements of the invention patent, and the patent is only a good implementation of the invention. The scope of the patent is not limited in this case. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the present invention are intended to be included in the scope of the following claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a multi-band antenna provided by an embodiment of the present invention. Stereoscopic view of Fig. 2 is another diagram of the multiband antenna shown in Fig. 1. Figure 3 _ i shows the multi-(four) sky-shaped wire branch, short light shot knife, short-circuit bar and grounding front view. , 4 series of multi-band antennas shown in Figure 3 ★ Long light knife with size, Μ radiation branch 'full bean road strip and front view of the grounding part. Figure 5 is a front elevational view of the multi-band day and ground portion shown in Figure 1.玍❻ 玍❻ New Parasitic Strips Figure 6 _ 5 shows the multi-band antenna _ with long size of the size, ugly parasitic strips and the front view of the ground. [Main component symbol description] Long radiation branch long radiation branch First level minister Radiation branch Second level 110 Long parasitic strip vertical part 143 ill Short parasitic strip 15Q 112 Short parasitic strip First level part Hi ί .5 13 1334671 Long radiation Branch vertical portion short radiation branch shorting bar first portion second portion long parasitic strip length parasitic strip first level first parasitic strip second level portion 113 short parasitic strip second level portion 152 120 short parasitic strip vertical portion 153 130 ground portion 160 131 First vertical plane 161 132 second vertical plane 162 140 horizontal plane 163 141 feed point 170 142

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Claims (1)

丄JJ yue U / 1 X. Patent application scope: 1. Multi-band antenna, including _ long _ branch, - short circuit strip, one feed point, knife 'short light shot split branch, short (four) branch a short-circuit strip connecting portion, the long-side strip, and the short-circuit strip is connected to the grounding portion, - a flat-fire branch, a short-radiation branch and a short-circuit strip are connected to the second:: the long-spoke short-circuit strip and the connecting portion The composition "aftershot branch, the short and light shot eight: fc open eight, the mouth structure to receive the low frequency band signal, (4) the shoot branch, the short circuit strip and the connection part consists of: receiving the high frequency band signal, the improvement is that the multi-frequency a long parasitic strip and a short parasitic strip, the long send: =; the step includes a second plane, and the second plane is parallel" the first strip is disposed in the bandwidth, the short parasitic strip is received by the antenna The bandwidth of the high-band signal. "Extending the multi-band range as described in item 1 of the multi-band range, wherein the long-water level-level" - the second level and - are connected to the first R-th. The vertical part of the 水 and 苐 二 level. The multi-band antenna according to claim 2, wherein the short knives are a long strip structure and disposed between the level portion and the second level portion. The multi-band antenna according to the parent of the text, wherein the short: the brother-part and the second file extending from the first portion, the first portion of the short-circuit bar is wider than the second portion, and the first A part of 15 (S 丄JJ矸0/丄 is connected to the grounding part. 5 Women as in the application of patent scope item i (4) with an antenna, wherein = section includes - the first level, - parallel to the first level : 6准1由和—Connecting the first level and the second level of the vertical Zou Guangshi as applied for the multi-band antenna described in Item 1. The short parasitic strip includes a first level , a parallel.s μ Le Qiu R ^ 'Shiyan Yudi's second water ° ' and - even (four) - the vertical part of the second level of the material. For example, the scope of claim 1 a multi-band antenna, wherein: money includes: a second surface that is perpendicular to the first vertical surface: a surface and a water between the first vertical surface and the second vertical surface The vertical surface, the second vertical surface and the horizontal surface are respectively connected to the short strip, the long parasitic strip and the short strip. 16