TWI270236B - Loop antenna with capacitive structure - Google Patents

Abstract

The present invention relates to a loop antenna with a capacitive structure, comprising a grounding surface, a dielectric substrate, a signal feeding metal contact, and a radiation metal wire, wherein the radiation metal wire comprises a first radiation metal sub-wire, a second radiation metal sub-wire and a capacitive coupling metal wire. The first radiation metal sub-wire has a starting terminal and an ending terminal, and the starting terminal is connected to the signal feeding contact. The second radiation metal sub-wire has a starting terminal and an end terminal, and the ending terminal is connected to the grounding surface. The capacitive coupling metal wire has a starting terminal and an ending terminal, which are connected to the ending terminal of the first radiation metal sub-wire and the starting terminal of the second radiation metal sub-wire respectively. The capacitive coupling metal wire is located close to and parallel to the grounding surface to generate capacitive coupling, causing reduction of the size of the antenna. The present invention is employable to systems of digital TV band.

Description

1270236 玖, invention description: [Technical field of invention] 线通天·p ant晴)' system is applied to no [prior art] wide-band ί I size is small and must be dimensioned on the scale (==^TV products, usually with - ground plane u (refer to the figure), and antenna_body 10 5,945,958" loop antenna, (refer to the loop antenna of the tenth patent patent communication, its antenna contains - feed The short-distance coupling to the first radiation loop 21 and the second radiation_broad wave signal have a discontinuous section 23, 24, and the two-spoke off-circuit loop is used to adjust the resonant frequency of the antenna. ^ E and non-continuous segments The gap is the same as in the conventional antenna design described above. The antenna of the first clock must be about the operating segment (9) 3 up to the frequency of the effective radiation. For example, the antenna height must be 12 5 cm, = wavelength, and _ design; Although the second design structure meets the good radiation effect of the low-profile antenna, the required length of the loop antenna is about - the operation wave tn port ί wants to reach a comparative example, the total length of the antenna radiator is about 5 〇: ^ Advantages of 600MHz pose, but required by the antenna Too long, the road antenna is low to solve the above two problems, we put forward in the present day - kind of combination. ¢70236 loop antenna _ new design, not with the circuit board integration line and ground surface generated by the | Ma into the lightning cross-section:, electric valley light B Meng's bandwidth requirements, and antenna four == need value of the innovative design. - wavelength bungee has industry should [invention content] is to provide - a kind of rich structure The loop antenna's width ^=1 capacity' reduces the antenna size and increases the antenna frequency ίί bandwidth, which can effectively improve the operating bandwidth of the antenna. - The signal ^in point uses the second: micro?f bottom '-ground plane Located on the microwave substrate, the package; the first 1st known frequency signal factory light metal wire, the radiation metal wire and - the ancient * mountain heart Koda field shooting line 'the first child light metal wire has a starting end ίϊϋϊίίί and the signal The feed point is connected; the second sub-metal line, the i-ray line has a start end and an end end, and the end is connected to the ground and the valley metal/wire metal line. Having a starting end of the first sub-radiation metal line end and a second sub-spoke The metal wire generates a combined capacitance, reduces the size of the antenna, and increases the operational sin. [Embodiment], as in the 3® (4) The circuit of the present invention has a capacitor 3〇' 31 ' ί 32 模 ii ΐ The radiant metal line 33 is used to generate the operation of the antenna, the bismuth metal line 331, the second sub-radiation metal line 332, and the first sub-radiation metal line 331 has a start=-end. The start end is connected to the signal feed metal point 32:

a start end and an end end, the end being connected to the ground plane H having a start end and a end end, respectively, the first sub-radiation of the genus and the start of the sub-radio metal line 332 are connected, wherein the electric δ is Λ 333 'closes and parallels the ground plane 3〇 to create a coupling capacitor, and 1270236 reduces the size required for the antenna. The medium substrate is a microwave medium. Figure 4 is a graph showing the return loss experiment of Embodiment 3 of the antenna of the present invention. The antenna bandwidth can be from 443 MHz to 718 MHz (~47%) under the definition of a voltage standing wave ratio (VSWR) of less than 3.5.

FIG. 5 is another embodiment 5 of the loop antenna with a capacitor structure according to the present invention, comprising: a ground plane 5〇, a dielectric substrate 51, a signal feeding metal point 52, and a radiation metal line 53. . The radiant metal line brother is used to generate the operating mode of the day, and has a first sub-radiation metal line 531, a second sub-radiation metal line 532 and an L-capacitive coupling metal line 533, and the first sub-radiation metal line 531 has two, a start end and an end, the start end is connected to the signal feed metal point 52, the second shot has a start end and a end end, the end is connected to the ground plane =, f = valley coupling metal line 533 is located The outer side of the dielectric substrate 51 is a bent junction and a second holding and an end, respectively connected to the end of the first sub-projection metal wire 531 at the end of the woven wire 2, the line 532, wherein the capacitor consumes metal Line 533 夂5G is close to and parallel to generate a light-combining capacitor, and the antenna is reduced. The sixth package contains the = face = point 62 and a radiant metal green 63. And by, soil & 61, a §fl唬 feed metal 632 and - capacitor light metal wire yang, and the genus ^ structure ^: ^, the initial "connected to the signal feed ϋ the capacitive coupling Jinlin 633 has a connection grounding surface 60, the end of the metal wire 631 and the second sub-module, the material is light, the antenna size is reduced and the bandwidth is increased. The embodiments described in the description of the present invention are merely illustrative of the principles of the present invention and its work 13 1270236

5: Another embodiment 50 of the present invention: ground plane 52: signal feed point 531 · · first sub-radiation metal line 533: capacitive coupling metal line 6 · Another embodiment 60 of the present invention: ground plane 62: Signal feed point 631: first sub-radiation metal line 633: capacitive coupling metal line 51: dielectric substrate 5 3 · wheel metal line 532: second sub-radiation metal line 61: dielectric substrate 63: radiation metal line 632: second Sub-radiation metal wire

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Claims (1)

^70236 Preparation, patent application scope · Li has a capacitor recording structure of Wei antenna, including: a ground plane; - dielectric substrate; = number of feed points, located on the surface of the substrate, connected to the system signal source, with the slave transmission Signal Fortunately, Meng Mengxian, the round metal wire contains: : the first - sub-contact metal wire, the first - pin metal wire has - the starting end and one end, the starting end is connected to the signal feeding point; a metal line, the second sub-metal line has a start end and an end, the end is connected to the ground plane; and: the capacitor meets the metal line; the capacitor holding metal line has a start end and a last end respectively The end of the first-sub-wire metal line and the second sub-metal line start end are connected. The capacitor-age metal wire is close to and parallel to the ground plane to generate the age capacitance and control the frequency of the day and line operation. 2. The capacitive structure loop antenna of claim 1, wherein the radiating metal wire is used to generate an operational mode of the antenna. , '3', as described in the first paragraph of the patent application, has a capacitor antenna, and a channel antenna, wherein the substrate is a microwave medium. 4. As described in the first paragraph of the patent application, there is a capacitor god _ Υ ^ ^ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 5. The % sub-radiation wire with capacitive gentleman's broadcast +, ', ,, and mouth Fu as described in item 1 of the patent application, wherein 16 1270236 1 the first sub-radiation metal line and the second sub-radiation The wire can be a bent structure. 17 8