CN201060929Y - multi-frequency antenna - Google Patents

Abstract

The utility model discloses a multifrequency antenna that area is less. The multi-frequency antenna comprises an edge portion, a first radiation portion, a second radiation portion and a connecting portion. The first radiating part is provided with a radiating transverse strip and a radiating longitudinal strip. The second radiation part is rectangular plate-shaped, is arranged above the right side and the edge part of the radiation longitudinal strip of the first radiation part and is separated from the radiation longitudinal strip and the edge part by a gap, the left end of the second radiation part is provided with a notch which is parallel to the radiation longitudinal strip and is communicated with the gap between the second radiation part and the edge part, and the right end of the second radiation part is provided with a feed-in point. This first radiation portion makes second radiation portion and first radiation portion coupling near the second radiation portion for the electric length of second radiation portion need not reach high frequency electromagnetic wave's quarter wavelength alright receive and dispatch high frequency electromagnetic wave band signal, thereby makes the utility model discloses multifrequency antenna's area is less, simple structure, the manufacturing degree of difficulty is low.

Description

multi-frequency antenna

Technical field

The utility model relates to an antenna, in particular to a multi-frequency antenna used for consumer electronic products such as mobile phones.

Background technique

Consumer electronic products such as mobile phones usually have antennas to send and receive electromagnetic signals. As consumer electronic products such as mobile phones are increasingly miniaturized and must adapt to different current wireless communication standards, the antennas on consumer electronic products must have the characteristics of small area and covering multiple wireless communication frequency bands.

Please refer to FIG. 1 , which is a structural diagram of a built-in multi-frequency antenna 1' disclosed in Chinese Patent Application No. 02116126.7, which uses the half-wavelength of electromagnetic waves as the receiving and receiving induction and can cover three frequency bands of 900MHz, 1800MHz and 1900MHz. The built-in multi-frequency antenna 1' includes a bent antenna body 10', and a signal feed-in point 11' is set on the antenna body 10', and the signal feed-in point 11' separates the antenna body 10' into electrical The first radiating portion 12 ′ whose length is one-half the wavelength of the electromagnetic wave with the frequency of 900 MHz is bent back and forth and the second radiating portion 13 ′ whose electrical length is one-half the wavelength of the electromagnetic wave with the frequency of 1800 MHz. The first radiating part 12' sends and receives low-frequency electromagnetic wave signals of 900 MHz, the second radiating part 13' sends and receives high-frequency electromagnetic wave signals of 1800 MHz, and the first radiating part 12' and the second radiating part 13' can transmit and receive electromagnetic wave signals at two Resonance at one-half wavelength makes the bandwidth of the second radiating part 13 ′ also cover the range of 1900 MHz, thereby meeting the requirement of three frequencies. However, since the built-in multi-frequency antenna 1' sets its receiving operating frequency to one-half wavelength, the length of the built-in multi-frequency antenna 1' is relatively large, and the built-in multi-frequency antenna 1' The back and forth bent design is adopted, so the built-in multi-frequency antenna 1' occupies a relatively large area and is difficult to manufacture.

Utility model content

The purpose of this utility model is to provide a multi-frequency antenna with small size and low manufacturing difficulty to solve the defects of the above-mentioned prior art.

To achieve the above purpose, the utility model multi-frequency antenna includes an edge part, a first radiating part, a second radiating part and a connecting part. The edge portion is in the shape of a strip extending laterally. The first radiating portion has a radiating horizontal bar extending transversely and a radiating vertical bar vertically extending downward from the right end of the radiating horizontal bar and connected to the left end of the edge portion. The second radiating part is in the shape of a rectangular plate. It is placed on the right side and above the edge of the radiating longitudinal bar of the first radiating part and is separated from the radiating longitudinal bar and the edge by a gap. A feed-in point is arranged at the right end of the slot communicating with the gap between the second radiating portion and the edge portion. The connection part is connected between the lower right end of the second radiation part and the right end of the edge part.

As mentioned above, the multi-frequency antenna of the present invention transmits and receives low-frequency electromagnetic wave band signals through the first radiating part, and the first radiating part is close to the second radiating part to couple the second radiating part with the first radiating part, so that the second radiating part The electrical length does not need to reach a quarter of the wavelength of the high-frequency electromagnetic wave to transmit and receive signals in the high-frequency electromagnetic wave band, so that the area of the multi-frequency antenna is relatively small, and the first radiating part and the second radiating part of the multi-frequency antenna The structure is simple, thereby simplifying the structure of the multi-frequency antenna and reducing the difficulty of manufacturing the multi-frequency antenna.

Description of drawings

In the accompanying drawings of the manual:

FIG. 1 is a schematic structural diagram of an existing built-in multi-frequency antenna.

FIG. 2 is a structural schematic diagram of the multi-frequency antenna of the present invention.

Fig. 3 is a three-dimensional combination diagram of the multi-frequency antenna assembled on the antenna bearing plate of the present invention.

The reference numerals of each element in the figure are explained as follows:

Multi-frequency antenna 1 Antenna body 10, 10’

Upper edge 11 Lower edge 12

Left edge 13 Right edge 14

Rectangular notch 20 groove 30

First groove 31 Second groove 32

The first radiation part 40, 12' radiation horizontal bar 41

Radiating longitudinal bar 42 Second radiating part 50, 13'

Slot 51 Connection part 52

Feed point 53, 11' edge part 60

Antenna carrying plate 70 top surface 71

Front face 72

Built-in multi-frequency antenna 1’

Detailed ways

In order to illustrate the technical content, structural features, purpose and effect of the present utility model in detail, the following will describe in detail in conjunction with the embodiments and accompanying drawings.

Please refer to FIG. 2 , the multi-frequency antenna 1 of the present invention can be formed by stamping a rectangular metal plate extending horizontally or etching copper foil on a flexible circuit board. The multi-frequency antenna 1 includes an antenna body 10 in the shape of a rectangular plate. The antenna body 10 has an upper edge 11 , a lower edge 12 , a left edge 13 and a right edge 14 . A rectangular block is cut inward from the lower edge 12 and the left edge 13 at the lower part of the left end of the antenna body 10 to form a rectangular gap 20 .

The antenna body 10 defines an "L"-shaped groove 30 . The groove 30 has a first groove 31 opened from the left side of the upper edge 11 of the antenna body 10 to the lower edge 12 close to the lower edge 12 and a right edge from the lower end of the first groove 31. 14 opens to the second groove 32 close to the right edge 14, so that the first radiation part 40 is formed on the left side of the first groove 31, and the first radiation part 40 is formed on the right side of the first groove 31 and on the second groove 32. A rectangular plate-shaped second radiation portion 50 is formed on one side, and a strip-shaped edge portion 60 extending laterally is formed on the lower side of the second groove 32 .

The first radiating part 40 is a monopole antenna, and its electrical length is a quarter wavelength of the 900MHz electromagnetic wave. The radial vertical bar 42 extends and is connected to the left end of the edge portion 60 . Wherein, the length of the radiating horizontal bar 41 is greater than the length of the radiating vertical bar 42 , and the width of the radiating vertical bar 42 is greater than the width of the radiating horizontal bar 41 .

The second radiating part 50 is also a monopole antenna. A slot 51 parallel to the first groove 31 and connected to the second groove 32 is opened upwards from the lower part of the left end of the second radiating part 50. The right end of the second radiating part 50 Extending downward is a connecting portion 52 connected to the right end of the edge portion 60 . A feeding point 53 is disposed below the right end of the second radiating portion 50 adjacent to the second groove 32 and the connecting portion 52 . The electrical length of the second radiating portion 50 is less than a quarter wavelength of an electromagnetic wave with a frequency of 1800 MHz.

Please refer to FIG. 3 , the multi-frequency antenna 1 of the present invention is arranged on an antenna supporting board 70 . The antenna supporting board 70 has a top surface 71 and a front surface 72 . Both the first radiating portion 40 and the second radiating portion 50 are disposed on the top surface 71 of the antenna supporting board 70 . Wherein, the upper edge 11 of the antenna body 10 is flush with the rear end of the antenna carrying plate 70, the right edge 14 of the antenna body 10 is flush with the right end of the antenna carrying plate 70, and the left edge 13 of the antenna body 10 is flush with the antenna carrying plate 70. The left end of the plate 70 is flush. The antenna carrying plate 70 may be provided with other components, such as Bluetooth chips, etc. under the rectangular notch 20 . The edge portion 60 is bent downwards to be in close contact with the front surface 72 of the antenna supporting board 70 .

When the multi-frequency antenna 1 of the present invention is used for communication, the first radiating part 40 resonates with the electromagnetic wave with a frequency of 900MHz to send and receive electromagnetic wave signals of the GSM900 communication system. The first radiating part 40 is close to the second radiating part 50. The second radiating part 50 obtains energy by coupling with the first radiating part 40 to excite a resonant mode to realize the transmission and reception of electromagnetic waves. The second radiating part 50 can Send and receive electromagnetic wave signals of DCS1800 and PCS1900 communication systems. The edge portion 60 is disposed on the front surface 72 of the antenna supporting board 70 to increase the gain of the multi-frequency antenna 1 .

In summary, the utility model multi-frequency antenna 1 transmits and receives the electromagnetic wave signal of the GSM900 communication system through the first radiating part 40, and the first radiating part 40 is close to the second radiating part 50 so that the second radiating part 50 and the first radiating part 40 coupling, so that the electrical length of the second radiating part 50 does not need to reach a quarter wavelength of the high-frequency electromagnetic wave to send and receive electromagnetic wave signals of the DCS1800 and PCS1900 communication systems, so that the area of the multi-frequency antenna 1 is small, and the multiple The structure of the first radiating part 40 and the second radiating part 50 of the multi-frequency antenna 1 is simple, thereby simplifying the structure of the multi-frequency antenna 1 of the present invention and reducing the manufacturing difficulty of the multi-frequency antenna 1 .

Claims (6)

1. multifrequency antenna, it is characterized in that: described multifrequency antenna comprises edge part, first Department of Radiation, second Department of Radiation and connecting portion; This edge part is the strip of horizontal expansion; This first Department of Radiation has the radiation taeniae that the radiation horizontal stripe of horizontal expansion and right-hand member from this radiation horizontal stripe extend vertically downward and be connected with the left end of edge part; This second radiation is rectangular tabular, its place the right side of radiation taeniae of first Department of Radiation and edge part the top and with a radiation taeniae and edge part gap at interval, its left end offers a fluting parallel with the radiation taeniae and that be communicated with gap between this second Department of Radiation and the edge part, and its right-hand member is provided with a load point; This connecting portion is connected between the right-hand member of the downside right-hand member of second Department of Radiation and edge part.

2. multifrequency antenna according to claim 1 is characterized in that: the downside of described radiation horizontal stripe and radiation taeniae left side form the breach of a rectangle.

3. multifrequency antenna according to claim 1 is characterized in that: the length of described radiation horizontal stripe is greater than the length of radiation taeniae, and the width of radiation taeniae is greater than the width of radiation horizontal stripe.

4. multifrequency antenna according to claim 1 is characterized in that: vertical first Department of Radiation of described edge part and the second Department of Radiation setting.

5. multifrequency antenna according to claim 1 is characterized in that: the electrical length of described first Department of Radiation is that frequency is the electromagnetic quarter-wave of 900MHz.

6. multifrequency antenna according to claim 1 is characterized in that: the electrical length of described second Department of Radiation is the electromagnetic quarter-wave of 1800MHz less than frequency.

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