CN201181734Y - Three-dimensional multi-frequency antenna - Google Patents

Abstract

In order to improve the bandwidth, the utility model discloses a three-dimensional multifrequency antenna, which comprises a grounding part; a first radiation element, which comprises a first section part, a second section part and a bending part, and is connected with the first section part and the second section part; a second radiating element; a short circuit element connected to the grounding part and the second radiation element; and a feed-in element having two non-parallel sides, the feed-in element connecting the first section of the first radiation element and the second radiation element. The feed-in element can make the current generate paths in different directions, thereby increasing the resonance point and further achieving the effect of improving the bandwidth.

Description

Stereometric multi-frequency antenna

Technical field

The utility model is meant a kind of multifrequency antenna, refers to a kind of stereometric multi-frequency antenna that is used for the various wireless communication network especially.

Background technology

Antenna is to be used for emission or reception radio wave, to transmit or the exchange radio signal.The electronic product that generally has radio communication function as notebook computer, visits wireless network by built-in antenna usually.Generally speaking, desirable antenna should be able to be contained the required frequency band of different wireless communication network with single antenna.In addition, should reduce as much as possible in the antenna size design,, aerial integration be gone in the notebook computer to cooperate the trend of portable radio communication equipment volume-diminished.In the prior art, (PlanarInverted-F Antenna PIFA) is widely used in the mobile communication equipment a kind of plane inverse-F formula antenna, in order to realize built-in multiple frequency type antenna.Plane inverse-F formula antenna has simple in structure and convenient advantage of making, yet its duty-cycle unipole antenna that can provide (Monopole Antenna) is little.Another kind of have high-gain and undersized advantage by the antenna improved three-dimensional PIFA antenna that forms of plane inverse-F formula, but still limited for the lifting effect of frequency range.

Please refer to Fig. 1, Fig. 1 is the schematic diagram of existing one three-dimensional multifrequency antenna 10.Multifrequency antenna 10 comprises a short-circuit component 12, a Connection Element 14, a radiant element 16 and a feed-in element 18.Short-circuit component 12 is used for multifrequency antenna 10 is short-circuited to ground.Feed-in element 18 is coupled to a feed-in line 19, is used for signal is fed into radiant element 16.Radiant element 16 is to form via bending one long-bar metal sheet, can be by different path radiation high frequency and low-frequency electromagnetic waves.In addition, please refer to Fig. 2 and Fig. 3, Fig. 2 is the expanded view of multifrequency antenna 10, and its Jin Yi Walk indicates the size example of multifrequency antenna 10.Fig. 3 is voltage standing wave ratio (Voltage Standing Wave Ratio, oscillogram VSWR) that multifrequency antenna 10 changes the width gained of feed-in element 18.In Fig. 3, CH1, CH2, CH3 represent the width W of feed-in element 18 respectively _PDuring for 2mm, 3mm, 4mm, the waveform of measured voltage standing wave ratio.As shown in Figure 3, be under 2: 1 the condition, in voltage standing wave ratio even change the width W of feed-in element 18 _P, still can't effectively promote frequency range.

In addition, know usually that as this area tool the knowledgeable knows, the radiant body path of antenna need greater than or approximate 1/4th of the defeated or wavelength of radio wave that receives of tendency to develop.In this case, radiant element 16 can take the area of plane of certain size, causes multifrequency antenna 10 shared areas effectively to reduce, and is difficult to adapt to the miniaturization and promote the demand of frequency range of taking up room.

Summary of the invention

Therefore, main purpose of the present utility model is to provide a kind of stereometric multi-frequency antenna.

The utility model is to disclose a kind of three-dimensional multifrequency antenna, includes a grounding parts; One first radiant element includes one first section portion; One second section portion; And a kink, connect this first section portion and this second section portion; One second radiant element; One short-circuit component connects this grounding parts and this second radiant element; And a feed-in element, having non-parallel dual-side, this feed-in element connects this first section portion and this second radiant element of this first radiant element.

Description of drawings

Fig. 1 is the schematic diagram of existing one three-dimensional multifrequency antenna.

Fig. 2 is the expanded view of the multifrequency antenna of Fig. 1.

Fig. 3 is the oscillogram of the voltage standing wave ratio of the multifrequency antenna of Fig. 1 width gained that changes the feed-in element.

Fig. 4 is the schematic diagram of the three-dimensional multifrequency antenna of the utility model embodiment one.

Fig. 5 is the expanded view of the multifrequency antenna of Fig. 4.

Fig. 6 is the oscillogram of voltage standing wave ratio of the multifrequency antenna of the multifrequency antenna of Fig. 1 and Fig. 4.

The main element symbol description:

10,20 multifrequency antennas

12,22 short-circuit components

14 Connection Elements

16 radiant elements

18,28 feed-in elements

19,36 feed-in lines

280 load points

24 first radiant elements

26 second radiant elements

30 first sections portions

32 second sections portions

34 kinks

38 grounding parts

The L1 top

L2 bottom

S1, S2 side

The waveform of CH1, CH2, CH3, CH4 voltage standing wave ratio

Embodiment

Please refer to Fig. 4, Fig. 4 is the schematic diagram of the three-dimensional multifrequency antenna 20 of the utility model embodiment one.Multifrequency antenna 20 includes a grounding parts 38, one first radiant element 24, one second radiant element 26, a short-circuit component 22 and a feed-in element 28.Grounding parts 38 is used for multifrequency antenna 20 ground connection, and it can be a conductor patch or a metallic plate.The path radiation low-frequency electromagnetic wave of first radiant element 24 includes one first section portion 30, one second section portion 32 and kink 34.Kink 34 connects first section portion 30 and second section portion 32.The path that second radiant element 26 is coupled to feed-in element 28 and short-circuit component 22, the second radiant elements 26 is used for the radiation frequency electromagnetic waves.Short-circuit component 22 connects second radiant element 26 and grounding parts 38.Feed-in element 28 is formed by a trapezoidal sheet metal, and include a top L1 and be coupled to 30, the one following L2 of first section portion and be coupled to second radiant element 26, and nonparallel dual-side S1 and S2.

In Fig. 4, first radiant element 24 can form by bending a long-bar metal sheet or joint multi-disc sheet metal.In other words, first section portion of first radiant element 24 30, second section portion 32 and kink 34 can be the each several part of the long-bar metal sheet of a bending, or are sheet metal independently.First section portion 30, second section portion 32 and kink 34 form an opening, towards the left side of Fig. 4.The part plane of first section portion 30 and second section portion 32 is parallel to each other.Feed-in element 28 is parallel with first section portion 30, and the length of top L1 is greater than the length of following L2, and side S1 and S2 symmetry are isometric, and the dual-side line stretcher forms 125 ° angle.Certainly, in other embodiment of the utility model, the side S1 of feed-in element 28 and S2 can also asymmetric mode form 125 ° angle.In addition, in other embodiment of the utility model, other comprises a feed-in line 36 and is coupled to a load point 280, is used for signal is fed into first radiant element 24 and second radiant element 26.

Please refer to Fig. 5, Fig. 5 is the expanded view of multifrequency antenna 20, and its Jin Yi Walk indicates the size example of multifrequency antenna 20.Compare with the existing multifrequency antenna 10 of Fig. 2, the length of both radiant elements of multifrequency antenna 20 and multifrequency antenna 10 is close.In addition, please refer to Fig. 6, (CH2 and CH4 represent the waveform of the voltage standing wave ratio of multifrequency antenna 10 multifrequency antennas 20 respectively to Fig. 6 for Voltage Standing Wave Ratio, oscillogram VSWR) for the voltage standing wave ratio of existing multifrequency antenna 10 and the utility model multifrequency antenna 20.In Fig. 6, the waveform of the voltage standing wave ratio of multifrequency antenna 10 is the width W with feed-in element 18 _PFor the condition of 3mm records (being the CH2 among Fig. 3), the waveform of the voltage standing wave ratio of multifrequency antenna 20 is that the following L2 with feed-in element 28 is that the condition of 3mm records.As shown in Figure 6, be that multifrequency antenna 20 has promoted high frequency frequency range partly significantly compared to multifrequency antenna 10 under 2: 1 the condition in voltage standing wave ratio.In existing multifrequency antenna 10, because feed-in element 18 is a rectangle, the identical resonance point that current path produced is limited.In comparison, the utility model embodiment multifrequency antenna 20 is by trapezoidal feed-in element 28, and therefore the path that makes electric current produce different directions can increase resonance point, and then reaches the effect that increases frequency range.In brief, multifrequency antenna 20 is the path radiation low-frequency electromagnetic waves by first radiant element 24, and, utilize trapezoidal feed-in element 28 to increase resonance point simultaneously, and then reach the effect that increases frequency range by the path radiation frequency electromagnetic waves of second radiant element 26.

As from the foregoing, the utility model embodiment is by trapezoidal feed-in element, and therefore the path that makes electric current produce different directions can increase resonance point, and then reaches the effect that increases frequency range.On the other hand, the utility model embodiment also has undersized advantage, therefore is more suitable for being applied in the limited Portable communication equipment of antenna space.

The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim scope change and modify, and all should belong to covering scope of the present utility model.

Claims (4)

1. A three-dimensional multi-frequency antenna is characterized in that it comprises: a grounding portion; A first radiating element, comprising: - the first paragraph; a second paragraph; and a bending portion connecting the first section and the second section; a second radiating element; a short circuit element connecting the ground portion and the second radiating element; and A feed-in element has non-parallel two sides, the feed-in element connects the first section of the first radiating element and the second radiating element. 2. The multi-frequency antenna according to claim 1, wherein partial planes of the first section and the second section are parallel to each other. 3. The multi-frequency antenna according to claim 1, wherein the length of the side connecting the feeding element to the first radiating element is longer than the side connecting the feeding element to the second radiating element length. 4. The multi-frequency antenna according to claim 1, wherein the angle formed by the extension lines of the two sides of the feeding element is 125 degrees.

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