TWM618354U - Antenna structure - Google Patents

Abstract

This creation discloses an antenna structure, which includes: a ground plate, the upper part of the front surface of the ground plate has a protruding boss formed forward; a first antenna part, the first antenna part includes a first radiator and a The second radiator, the first radiator is arranged on the boss, the first radiator extends from the front surface of the boss to the lower surface of the boss to form a feeding part, and the second radiator is arranged at the bottom of the front surface of the boss; The second antenna part is formed by extending the first radiator to the right, and the second antenna part is connected with the second radiator; the third antenna part is arranged at the bottom of the front surface of the boss, and is located at the first radiator and the second radiator. Between the radiator and the second antenna portion, there is a gap between the third antenna portion and the second antenna portion, and the gap has the effect of increasing the bandwidth; the fourth antenna portion includes a third radiator and a fourth radiator The third radiator is arranged on the left of the feeding part of the first radiator, and the fourth radiator is formed by extending the feeding part to the left.

Description

Antenna structure

This creation relates to an antenna structure, in particular to an antenna structure with multiple frequency bands.

In response to the future development of 5G communications, it is necessary to add n77, n78, and n79 frequency bands to the existing 4G frequency bands in the Sub-6G frequency band to meet the current multi-frequency demand for mobile communications. Therefore, it is a big challenge to design a multi-band antenna in a limited space.

Generally speaking, the antennas used in hidden mobile communication devices on the market are basic antenna forms such as PIFA (Planar Inverted F Antenna), Monopole, or Loop. There are certain restrictions on increasing the application bandwidth and area size. Meet the needs of multiple frequency bands and miniaturization.

Therefore, it is necessary to provide an antenna structure that can have a multi-band function in a limited space.

The purpose of this creation is to provide an antenna structure with multiple frequency bands.

In order to achieve the above objectives, the present invention discloses an antenna structure, which includes: a ground plate, the upper part of the front surface of the ground plate has a protruding boss formed forward; a first antenna part, the first antenna part includes a first antenna part A radiator and a second radiator, the first radiator is arranged on the boss, the first radiator extends from the front surface of the boss to the lower surface of the boss to form a feeding part, and the second radiator is arranged on the boss The bottom of the front surface; the second antenna part is formed by extending the first radiator to the right, and the second antenna part is connected with the second radiator; the third antenna part is arranged at the bottom of the front surface of the boss and is located at the first There is a gap between the radiator, the second radiator and the second antenna part, and between the third antenna part and the second antenna part, the gap has the effect of increasing the bandwidth; the fourth antenna part includes the third radiator The third radiator is arranged on the left of the feeding part of the first radiator, and the fourth radiator is formed by extending the feeding part to the left.

In summary, the antenna structure of this creation uses parasitic and coupling methods to generate the remaining resonance frequencies. This method can use the harmonics of the original main frequency and the coupled frequency to overlap each other to increase the bandwidth range and make the original Creative antenna structure application frequency band can be wider, and the area can be used more effectively without occupying too much space.

In order to explain in detail the technical content, structural features, achieved goals and effects of this creation, the following examples are given with examples and detailed descriptions in conjunction with the drawings.

Please refer to the first and second figures. The present invention discloses an antenna structure 100, which is a Planar Inverted F Antenna (PIFA). The antenna structure 100 includes a ground plate 1.

The upper part of the front surface of the ground plate 1 has a boss 11 formed by protruding forward. The boss 11 includes a first antenna portion 2, a second antenna portion 3, a third antenna portion 4 and a fourth antenna portion 5. The lower surface of the boss 11 is connected with a grounding area 12.

The first antenna part 2 includes a first radiator 21 and a second radiator 22. The first radiator 21. The first radiator 21 is provided on the boss 11. The first radiator 21 has a first extension 211 extending from the bottom to the top of the front surface of the boss 11.

The first extension 211 extends from the front surface of the boss 11 to the lower surface of the boss 11 to form a feeding part 212. The feeding part 212 is not connected to the grounding area 12, and the signal can enter the antenna structure 100 through the feeding part 212. The top of the first extension portion 211 extends to the right to form a second extension portion 213. The second extension 213 then extends rightward to the rightmost end of the boss 11 to form a third extension 214. The second extension 213 is wider than the third extension 214. The third extension 214 extends upward from the front surface of the boss 11 to the upper surface of the boss 11 to form a fourth extension 215. The fourth extension 215 extends leftward from the rightmost end of the boss 11 to the leftmost end of the boss 11 to form a fifth extension 216.

The second radiator 22 is arranged on the right of the first radiator 21, and the second radiator 22 is arranged on the bottom of the front surface of the boss 11. The left end of the second radiator 22 has a sixth extending portion 221 formed to extend upward. The right end of the second radiator 22 extends downward to the lower surface of the boss 11 to form a first grounding portion 222, and the first grounding portion 222 is connected to the grounding area 12. Both the first radiator 21 and the second radiator 22 in the first antenna part 2 have a bandwidth of 704 MHz to 960 MHz.

The upper surface of the boss 11 also has a recessed groove 23 under the fourth extension 215 of the first radiator 21. The groove 23 and the third extension portion 214 have a frequency doubling effect, so that the first antenna portion 2 has a frequency bandwidth of 1710 MHz to 2170 MHz.

The second antenna portion 3 is formed by extending the first extension portion 211 to the right. The second antenna portion 3 is connected to the top end of the sixth extension portion 221 of the second radiator 22. The second antenna portion 3 then extends to the right to form a seventh extension portion 31. The seventh extension portion 31 is wider than the second antenna portion 3. The second antenna section 3 has a bandwidth of 2300 MHz to 2600 MHz.

The third antenna part 4 is arranged at the bottom of the front surface of the boss 11 and located between the first radiator 21, the second radiator 22 and the second antenna part 3. There is a gap G between the third antenna portion 4 and the second antenna portion 3, and the gap G has the effect of increasing the bandwidth. The left end of the third antenna portion 4 extends downward to the lower surface of the boss 11 to form a second grounding portion 41, and the second grounding portion 41 is connected to the grounding area 12. The third antenna unit 4 has a bandwidth of 3300 MHz to 3800 MHz.

The fourth antenna part 5 includes a third radiator 51 and a fourth radiator 52. The third radiator 51 is arranged on the left of the feeding part 211 of the first radiator 21. The third radiator 51 has an eighth extending portion 511 extending upward. The eighth extension portion 511 is wider than the third radiator 51. The third radiator 51 extends downward to the lower surface of the boss 11 to form a third grounding portion 512, and the third grounding portion 512 is connected to the grounding area 12. The fourth radiator 52 is formed by extending the feeding part 211 to the left. The fourth radiator 52 has a ninth extending portion 521 extending to the left. The ninth extension portion 521 is wider than the fourth radiator 52. The third radiator 51 has a bandwidth of 4400 MHz to 5000 MHz. The third radiator 51 is coupled with the fourth radiator 52, so that the fourth antenna section 5 simultaneously increases the bandwidth of the two frequency bands of 3300 to 3800 MHz and 4400 to 5000 MHz.

Referring to the third figure and the fourth figure, the voltage standing wave ratio (VSWR) test chart and Smith chart of the antenna structure 100 of the present invention are disclosed. When the creative antenna structure 100 operates at 704MHz, the voltage standing wave ratio is 6.5449 (M1 in the figure). When the creative antenna structure 100 operates at 960 MHz, the voltage standing wave ratio is 6.4916 (M2 in the figure). When the structure 100 operates at 1710MHz, the voltage standing wave ratio is 2.998 (M3 in the figure). When the creative antenna structure 100 operates at 2170MHz, the voltage standing wave ratio is 2.6258 (M4 in the figure). When the creative antenna structure 100 operates at At 2300MHz, the voltage standing wave ratio is 2.2879 (M5 in the figure). When the creative antenna structure 100 operates at 2690MHz, the voltage standing wave ratio is 2.4559 (M6 in the figure). When the creative antenna structure 100 operates at 3300MHz, the voltage The standing wave ratio is 2.6523 (M7 in the figure). When the creative antenna structure 100 operates at 3800MHz, the voltage standing wave ratio is 2.3726 (M8 in the figure). When the creative antenna structure 100 operates at 4400MHz, the voltage standing wave ratio is 5.8307 (M9 in the figure), when the creative antenna structure 100 operates at 5000MHz, the voltage standing wave ratio is 5.0647 (M10 in the figure). Therefore, the multi-frequency antenna 100 of the present invention can stably operate in the frequency range of 704-960MHz, 1710-2170MHz, and 2300-2600MHz.

Please refer to the fifth figure, which reveals the equivalent omnidirectional radiation power diagram of the creative antenna structure 100, showing the maximum radiation of the creative antenna structure 100 at each frequency. In this embodiment, the peak value of the equivalent omnidirectional radiation power in the full frequency band falls within the same range, that is, the power is stable.

bandwidth Frequency (MHZ) efficient(%) 700 704-824 55.56 800 791-894 60.72 900 880-960 50.47 1800 1710-1890 77.71 1900 1845-1995 77.98 2100 1920-2170 69.22 2300 2300-2360 71.84 2600 2500-2690 76.86 3500 3300-3800 53.98 4500 4400-5000 46.21 Table I

Please refer to the sixth, seventh and table 1 to respectively disclose the radiation power diagram, the radiation efficiency diagram, and the radiation efficiency average table of each frequency band of the creative antenna structure 100. Among them, the radiation power can be converted to the radiation efficiency. Radiation efficiency refers to the efficiency of converting average power into antenna radiation. At different frequencies, the higher the efficiency, the better. In this embodiment, the low frequency bandwidth is above 50%. Therefore, the inventive multi-frequency antenna 100 can achieve high efficiency of low frequency bandwidth and maintain high frequency bandwidth and efficiency in a limited space.

Based on the above, the antenna structure 100 of this creation is an inverted-F antenna of 704MHz-960MHz, 1710MHz-2170MHz, and 2300MHz-2600MHz. Parasitic and coupling methods are used to generate the remaining resonant frequencies. In this way, the harmonics of the original main frequency and the coupled frequency can be superimposed on each other to increase the frequency bandwidth, so that the antenna structure 100 of the creative antenna structure can be used in a wider range. , And the area can be used more effectively without occupying too much space.

100: antenna 1: Ground plate 11: Boss 12: Pick up area 2: The first antenna part 21: The first radiator 211: first extension 212: Feeding part 213: second extension 214: Third Extension 215: Fourth Extension 216: Fifth Extension 22: second radiator 221: Sixth Extension 222: The first ground part 23: Groove 3: The second antenna part 31: seventh extension 4: The third antenna part 41: The second ground part G: gap 5: The fourth antenna part 51: There is a third radiator 511: Eighth Extension 512: third ground part 52: The fourth radiator 521: Ninth Extension

[The first picture] is a three-dimensional view of the antenna structure of this creation.

[Second Picture] is another perspective view of the antenna structure of this creation.

[The third picture] is the working frequency of the antenna structure resonance of this creation.

[Fourth picture] is the Smith diagram of the antenna structure of this creation.

[Fifth Picture] is the equivalent omnidirectional radiation power diagram of the antenna structure of this creation.

[Picture 6] is the radiation power diagram of the antenna structure of this creation.

[Picture 7] is the radiation efficiency diagram of the antenna structure of this creation.

100: Antenna structure

1: Ground plate

11: Boss

12: Pick up area

2: The first antenna part

21: The first radiator

212: Feeding part

22: second radiator

222: The first ground part

23: Groove

3: The second antenna part

4: The third antenna part

5: The fourth antenna part

51: There is a third radiator

512: third ground part

52: The fourth radiator

Claims (9)

An antenna structure, comprising: a ground plate, the upper part of the front surface of the ground plate has a boss projecting forwardly, and the lower surface of the boss is connected with a ground area; a first antenna part, the The first antenna part includes a first radiator and a second radiator. The first radiator is disposed on the boss, and the first radiator extends from the front surface of the boss to the The lower surface of the boss forms a feed-in part, the feed-in part is not connected with the ground area, the second radiator is arranged on the right of the first radiator, and the second radiator is arranged on the On the bottom of the front surface of the boss, the second radiator is connected to the ground area, and the upper surface of the boss also has a groove formed by a depression; a second antenna part is formed by the first radiator Extending to the right side, the second antenna part is connected to the second radiator; a third antenna part is arranged at the bottom of the front surface of the boss, and is located at the first radiator and the Between the second radiator and the second antenna portion, there is a gap between the third antenna portion and the second antenna portion, and the gap has the effect of increasing the bandwidth, the third antenna Part is connected to the grounding area; a fourth antenna part includes a third radiator and a fourth radiator, the third radiator is arranged on the left of the feeding part of the first radiator, The third radiator is connected to the ground area, and the fourth radiator is formed by extending the feeding part to the left. The antenna structure according to claim 1, wherein the first radiator has a first extension extending from the bottom to the top of the front surface of the boss, and the first extension is from the front surface of the boss Extending to the lower surface of the boss to form the feeding portion, the feeding portion is not connected to the grounding area, the top of the first extension portion extends rightward to form a second extension portion, and the second extension portion Extending rightward to the rightmost end of the boss to form a third extension, the third extension extends from the front surface of the boss upwards to the upper surface of the boss to form a fourth extension, the first The four extension parts extend leftward from the rightmost end of the boss to the leftmost end of the boss to form a fifth extension part. The antenna structure according to claim 2, wherein the groove is recessed below the fourth extension of the first radiator on the upper surface of the boss, and the groove and the third extension have The effect of frequency multiplication. The antenna structure according to claim 2, wherein the left end of the second radiator has a sixth extension formed upward, and the right end of the second radiator extends downward to form on the lower surface of the boss A first grounding portion, the first grounding portion is connected to the grounding area. The antenna structure according to claim 1, wherein the second antenna portion extends to the right to form a seventh extension portion. The antenna structure according to claim 1, wherein the left end of the third antenna portion extends downward to the lower surface of the boss to form a second grounding portion, and the second grounding portion is opposite to the grounding area connect. The antenna structure according to claim 1, wherein the third radiator has an eighth extension formed by extending upward. The antenna structure according to claim 1, wherein the third radiator extends downward to the lower surface of the boss to form a third grounding portion, and the third grounding portion is connected to the grounding area. The antenna structure according to claim 1, wherein the fourth radiator has a ninth extension formed to extend leftward.

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