CN101826661B - Antenna with double grounding parts - Google Patents
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- CN101826661B CN101826661B CN200910004645.1A CN200910004645A CN101826661B CN 101826661 B CN101826661 B CN 101826661B CN 200910004645 A CN200910004645 A CN 200910004645A CN 101826661 B CN101826661 B CN 101826661B
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Abstract
The invention relates to an antenna with double grounding parts, which comprises a body part, a feed-in part, a first grounding part and a second grounding part. The body part is respectively electrically connected with the feed-in part, the first grounding part and the second grounding part. In addition, the body part corresponds to a resonance length for receiving or transmitting a radiation wave, wherein the current path from the first grounding part to the feed-in part along the body part is 1/2 of the resonance length, and the relative distance between the second grounding part and the first grounding part is 1/4 of the resonance length.
Description
Technical field
The invention relates to a kind of antenna, and particularly about a kind of antenna with double grounding parts.
Background technology
In Research of wireless communication systems field, different system not only has different frequencies and frequency range, sometimes also has the field pattern of different radiated waves and the design requirement of polarization.In addition, the environment of mobile communication has been full of and has disturbed and change, antenna is except the coordinating of the field pattern that will meet frequency, frequency range and radiated wave and polarization, also has the further problem of solution that needs, as multi-path (multipath) interference, the transformation of radiated wave polarization, the change of field pattern and the size of antenna, weight and the shape etc. of radiated wave.Wherein, multi-path interference can cause signal when transmitting, to produce the phenomenon of decline (fading), and reduces widely the reliability of wireless communication system.
The decline that the interference of solution multi-path causes is at present mainly space diversity (spatialdiversity), the field pattern diversity (pattern diversity) and polarization diversity (polarization diversity) that relies on antenna.Yet in the design of antenna, circular polarized antenna, when reception or emitted radiation ripple, does not have specific polarised direction, can solve easily the interference of being interfered the phase difference causing by multi-path.Therefore, satellite assisted communication system, global positioning system, microwave video monitoring system, E-payment system and microwave remote control and microwave measurement system etc., the design of the antenna of these communication systems all adopts circular polarized antenna to transmit signal.
Figure 1A and Figure 1B illustrate respectively the structural representation of conventional circular polarization antenna and the field pattern figure of radiated wave.Conventional circular polarization antenna is mainly that the radiation body 110 of antenna is printed in ceramic bases 120, and ceramic bases 120 is placed on the ground plane 130 of a symmetry.The symmetry of carrying at this refers to that ceramic bases 120 edges all equate to the distance of ground plane 130 edges.Radiation body 110 is mainly that a square is main metal covering, respectively intercepts respectively an isosceles triangle, to utilize its path difference to judge the characteristic of radiated wave in its lower-left and the upper right corner.When the conventional circular polarization antenna shown in Figure 1A is seated in symmetrical ground plane 130, it can produce radiated wave field pattern as shown in Figure 1B, and radiated wave is maximum toward the gain of z direction (zenith direction).
But on current communication products, as shown in the structural representation of Fig. 2 A conventional circular polarization antenna in application, the design of circular polarized antenna is often limited to moulding and the system of product, and need to be placed on asymmetrical ground plane 130.That is to say, a certain position that is limited to ground plane 130 is arrested in the position that now conventional circular polarization antenna can be put, and can not be arranged on symmetrical ground plane.At this, compare with the field pattern figure of the radiated wave of Figure 1B, when circular polarized antenna is positioned over asymmetrical ground plane, as shown in Figure 2 B, its radiated wave obviously reduces toward the gain of z direction (zenith direction), causes the collection of letters deleterious of antenna.In other words, when conventional circular polarization antenna applications is on current communication products, conventional circular polarization antenna can be limited to its allocation position and not have the characteristic of circular polarization.
Summary of the invention
The invention provides a kind of antenna with double grounding parts, utilize the design of two grounding parts to produce the linearly polarized wave of two quadratures, and then inspire the radiated wave of approximate circle polarization.By technological means of the present invention, not only can there is the gain effect of circular polarization radiation ripple, and the allocation position of antenna has elasticity in the extreme.
The invention provides a kind of antenna with double grounding parts, utilize the radiated wave that inspires approximate circle polarization with feeding portion two grounding parts side by side.
The present invention proposes a kind of antenna with double grounding parts, comprises a body, a feeding portion, one first grounding parts and one second grounding parts.Wherein, body is electrically connected feeding portion, the first grounding parts and the second grounding parts, and the corresponding resonance length of body, to receive and dispatch a radiated wave.In addition, the current path of the first grounding parts along body to feeding portion is resonance length 1/2 times.Between the second grounding parts and the first grounding parts, there is a relative distance.It is worth mentioning that, wherein resonance length can be between 1/3 to 1/5 times of wavelength of radiated wave.
In one embodiment of this invention, the first above-mentioned grounding parts and the relative distance between the second grounding parts are resonance length 1/4 times.
In one embodiment of this invention, above-mentioned body comprises one first electric-conductor, one second electric-conductor and one the 3rd electric-conductor.Wherein, the first electric-conductor, the second electric-conductor and the 3rd electric-conductor have first end and the second end respectively, and the first end of the second electric-conductor is electrically connected the first end of the first electric-conductor, and the first end of the 3rd electric-conductor is electrically connected the second end of the first electric-conductor.In addition, the second electric-conductor is electrically connected feeding portion, the first grounding parts and the second grounding parts.
In one embodiment of this invention, the second electric-conductor of the above-mentioned antenna with double grounding parts is electrically connected feeding portion by load point, and the current path of the second end of load point to the three electric-conductors is resonance length.
In one embodiment of this invention, the first grounding parts of the above-mentioned antenna with double grounding parts and the second grounding parts are arranged in respectively the same side of feeding portion along the direction of the second end towards the second electric-conductor, and the width of the first electric-conductor, the width of the second electric-conductor and the width of the 3rd electric-conductor are equal to each other.
In one embodiment of this invention, the first grounding parts of the above-mentioned antenna with double grounding parts and the second grounding parts are arranged on respectively the dual-side of feeding portion, and the width of the 3rd electric-conductor is greater than the width of the second electric-conductor.Wherein, there is the 3rd electric-conductor of antenna of double grounding parts and the ratio of the width of the second electric-conductor between 1.5 to 2.
In one embodiment of this invention, the first grounding parts of the above-mentioned antenna with double grounding parts and the second grounding parts are arranged in respectively the same side of feeding portion along the direction of the first end towards the second electric-conductor, and the width of the second electric-conductor and the 3rd electric-conductor is greater than respectively the width of the first electric-conductor.
In one embodiment of this invention, the width of the second above-mentioned electric-conductor and the 3rd electric-conductor with respect to the ratio of the width of the first electric-conductor respectively between 1.5 to 2.
From another viewpoint, the present invention proposes again a kind of antenna with double grounding parts, and comprises a body, a feeding portion, one first grounding parts and one second grounding parts.Wherein, body is electrically connected feeding portion, the first grounding parts and the second grounding parts.In addition, body has a load point, to extend a resonance length, receives and dispatches a radiated wave.At this, feeding portion is electrically connected body by load point.The first grounding parts, the second grounding parts and feeding portion are mutually side by side.Wherein, the current path of the first grounding parts along body to feeding portion is resonance length 1/2 times, and the relative distance of the first grounding parts and the second grounding parts is resonance length 1/4 times.It is worth mentioning that, wherein resonance length can be 1/3 to 1/5 times of wavelength of radiated wave.
Based on above-mentioned, the present invention is the design of utilizing two grounding parts, causes the antenna with double grounding parts can produce the linearly polarized wave of two quadratures, and then inspires the radiated wave of approximate circle polarization.Whereby, the antenna with double grounding parts of the present invention, except having microminiaturized advantage, also can be applicable to the transmission of the radiated wave between global positioning system, electronic product and satellite.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.
Accompanying drawing explanation
Figure 1A and Figure 1B are respectively the structural representation of conventional circular polarization antenna and the field pattern figure of radiated wave.
Fig. 2 A is the structural representation of conventional circular polarization antenna in application.
Fig. 2 B is the field pattern figure of conventional circular polarization antenna radiated wave while being arranged on asymmetric ground plane.
Fig. 3 A illustrates the structural representation according to the planar inverted F-shape antenna of one embodiment of the invention.
Fig. 3 B illustrates the structural representation according to the planar inverted F-shape antenna of another embodiment of the present invention.
Fig. 3 C illustrates the structural representation according to the planar inverted F-shape antenna of yet another embodiment of the invention.
Fig. 4 A and Fig. 4 B are respectively radiated wave according to one embodiment of the invention field pattern figure on direction in space angle theta and phi.
Fig. 4 C illustrates the field pattern figure according to the radiated wave of one embodiment of the invention.
The field pattern figure of its radiated wave when Fig. 5 A and Fig. 5 B illustrate respectively planar inverted F-shape antenna and only have a grounding parts.
Fig. 5 C illustrates the field pattern figure according to the radiated wave of another embodiment of the present invention.
Main element symbol description
110: radiation body
120: ceramic bases
130: ground plane
300,300 ', 300 ": planar inverted F-shape antenna
310,310 ', 310 ": body
311,311 ', 311 ": the first electric-conductor
312,312 ', 312 ": the second electric-conductor
313,313 ', 313 ": the 3rd electric-conductor
320: feeding portion
331: the first grounding parts
332: the second grounding parts
P31, P32, P33: load point
W11, W12, W13: the width of the first electric-conductor
W21, W22, W23: the width of the second electric-conductor
W31, W32, W33: the width of the 3rd electric-conductor
A01～A12: end points
B1, B2: direction
D11, D12, D13: current path
D21: distance
Embodiment
In the following description, for presenting the consistency to explanation of the present invention, therefore in different embodiment, if there is the same or analogous element of function and structure can be by identical component symbol and title.
The first embodiment
Fig. 3 A illustrates the structural representation according to the planar inverted F-shape antenna of one embodiment of the invention.With reference to Fig. 3 A, planar inverted F-shape antenna 300 comprises a body 310, a feeding portion 320, one first grounding parts 331 and one second grounding parts 332.Wherein, body 310 comprises one first electric-conductor 311, one second electric-conductor 312 and one the 3rd electric-conductor 313.
Specifically, the first electric-conductor 311 has two end points, is denoted as respectively A01 and A02; The second electric-conductor 312 has two end points, is denoted as respectively A03 and A04; The 3rd electric-conductor 313 has two end points, is denoted as respectively A05 and A06; Feeding portion 320 has two end points, is denoted as respectively A07 and A08; The first grounding parts 331 has two end points, is denoted as respectively A09 and A10; The second grounding parts 332 has two end points, is denoted as respectively A11 and A12.
Continuation is with reference to Fig. 3 A, and the first end A01 of the first electric-conductor 311 is electrically connected the first end A03 of the second electric-conductor 312, and the second end A02 of the first electric-conductor 311 is electrically connected the first end A05 of the 3rd electric-conductor 313.And the second end A07 of feeding portion 320 is electrically connected the second electric-conductor 312 accordingly by load point P31.The second end A09 of the first grounding parts 331 is electrically connected the second electric-conductor 312 of body 310.In addition, the second end A11 of the second grounding parts 332 is electrically connected the second electric-conductor 312 of body 310.
Further, on the interelement relative configuration relation of planar inverted F-shape antenna 300, the first grounding parts 331, the second grounding parts 332 and feeding portion 320 are mutually side by side.In addition, the the second end A04 of the second electric-conductor 312 of take is benchmark, along the direction B1 of the first end A03 towards the second electric-conductor 312, the second grounding parts 332, the first grounding parts 331 and feeding portion 320 are sequentially arranged in the same side of the second electric-conductor 312.From another angle, if take load point P31 as benchmark, along the direction B2 of the second end A04 towards the second electric-conductor 312, feeding portion 320, the first grounding parts 331 and the second grounding parts 332 are sequentially arranged in the same side of the second electric-conductor 312.
Continue referring to Fig. 3 A, the width W 11 of the first electric-conductor, the width W 21 of the second electric-conductor and the width W 31 of the 3rd electric-conductor are equal to each other.Specifically, the relative configuration relation between body 310 elements, for adjusting the impedance matching of planar inverted F-shape antenna 300 and the size of excitation current.Wherein, the size of excitation current and distribution, to the length of planar inverted F-shape antenna 300 with the resonance frequency wanting to reach relevant, and the current path of excitation current is denoted as D11 in Fig. 3 A, under a resonance frequency, effective resonance length of planar inverted F-shape antenna 300 is body 310 extends in order to the length that receive or launch a radiated wave, and 1/3 to 1/5 times of the wavelength (λ) that wherein resonance length is radiated wave is preferably 1/4 times.At this, the flow direction of current path D11 is through terminal A 01, A02 to A06 by load point P31.In addition, change along with indivedual width of the first electric-conductor 311, the second electric-conductor 312 and the 3rd electric-conductor 313, and first grounding parts 331, the second grounding parts 332 and feeding portion 320 relative allocation position to each other, all by the size of capable of regulating excitation current and distribute.In other words, the first electric-conductor 311, the second electric-conductor 312 and the length and width of the 3rd electric-conductor 313 of body 310 and the flow direction of current path D11 and corresponding resonance length thereof are relevant.
In addition, the current path of the first grounding parts 331 along body 310 to feeding portion 320,, from terminal A 10 along the first grounding parts 331, body 310 and feeding portion 320 to the formed current path of terminal A 08, be namely 1/2 times (being the length of λ/8) of resonance length.In addition, the relative distance D21 of the second grounding parts 332 and the first grounding parts 331, namely the vertical interval between the first end A12 of the second grounding parts 332 and the first end A10 of the first grounding parts 331, is 1/4 times (being the length of λ/16) of resonance length.
In integrated operation, the first grounding parts 331 and the second grounding parts 332 can be in order to adjust the impedance matching of planar inverted F-shape antenna 300.In addition, the design of the first grounding parts 331 and the second grounding parts 332, will make planar inverted F-shape antenna 300 can form the linearly polarized wave of two quadratures, and then produce the radiated wave of approximate circle polarization.For instance, if the radiated wave field pattern with different direction in space angle theta (θ) with phi (ψ) planar inverted F-shape antenna 300, to distinguish as shown in Figure 4A and 4B, but with general effect, the greatest irradiation field pattern of planar inverted F-shape antenna 300, towards z direction (zenith direction) radiation, therefore can form the radiated wave of approximate circle polarization as shown in Figure 4 C.
Comparatively speaking, if the planar inverted F-shape antenna described in this example 300 does not adopt the design of two grounding parts, and while only thering is the first grounding parts 331 or the second grounding parts 332, the field pattern of radiated wave will be distinguished as shown in Figure 5A and 5B, to produce obvious zero point (null), when the logical near zero-crossing point of any signal, its signal will have decay significantly, and have influence on the collection of letters quality of antenna.Otherwise, adopt the planar inverted F-shape antenna 300 of the design of the present embodiment, even if by near the factor that can affect antenna, such as: loud speaker, camera and battery etc. are incorporated to design, the radiated wave field pattern of planar inverted F-shape antenna 300 also will be as shown in Figure 5 C, the radiated wave of approximate circle polarization.
In other words, the planar inverted F-shape antenna 300 described in this example, because adopting the design of the first grounding parts 331 and the second grounding parts 332, therefore produces the linearly polarized wave of two quadratures, and then inspires the radiated wave of approximate circle polarization.In addition,, because the radiation characteristic of circularly polarised wave is receiving or during emitted radiation ripple, there is no specific polarised direction, also, without the above-mentioned region at zero point of generation, therefore can maintain its signal strength signal intensity, can not have influence on the collection of letters quality of antenna.So the planar inverted F-shape antenna 300 described in the present embodiment is suitable for being applied in global positioning system, the transmission of the radiated wave between electronic product and satellite.
The second embodiment
Fig. 3 B illustrates the structural representation according to the planar inverted F-shape antenna of another embodiment of the present invention.Please refer to Fig. 3 A and Fig. 3 B, the Main Differences of the second embodiment and the first embodiment is that the width of body 310 ' changes, the flow direction and the length of current path D12, and the putting in order and set-up mode of feeding portion 320, the first grounding parts 331 and the second grounding parts 332.
Specifically, in the present embodiment, body 310 ' comprises one first electric-conductor 311 ', one second electric-conductor 312 ' and one the 3rd electric-conductor 313 '.Current path D12 on body 310 ' is through terminal A 01, A02 to A06 from load point P32.On the interelement relative configuration relation of planar inverted F-shape antenna 300 ', the second end A07 of feeding portion 320 is by corresponding second electric-conductor 312 ' that is electrically connected of load point P32.The first grounding parts 331, the second grounding parts 332 and feeding portion 320 are mutually side by side.In addition, the first grounding parts 331 and the second grounding parts 332 are separately positioned on the dual-side of feeding portion 320.In other words, the second grounding parts 332, feeding portion 320 and the first grounding parts 331 are sequentially arranged in the same side of the second electric-conductor 312 ' along the direction B1 towards the first electric-conductor 311 '.
At this, with reference to Fig. 3 B, the width of the first electric-conductor 311 ' is denoted as W12, and the width of the second electric-conductor 312 ' is denoted as W22, and the width of the 3rd electric-conductor 313 ' is denoted as W32.At this, the width W 32 of the 3rd electric-conductor 313 ' is greater than the width W 22 of the second electric-conductor 312 ', the width W 32 of the 3rd electric-conductor 313 ' is also greater than the width W 12 of the first electric-conductor 311 ', and the ratio (W32/W22) of the width of the 3rd electric-conductor 313 ' and the second electric-conductor 312 ' is between 1.5 to 2, and the ratio (W32/W12) of the width of the 3rd electric-conductor 313 ' and the first electric-conductor 311 ' is also between 1.5 to 2.Specifically, first grounding parts 331 of the present embodiment can have influence on size and the distribution of excitation current, and namely the first grounding parts 331 can attract the excitation current of part, makes to reduce at the excitation current of current path D12.Impact excitation current being caused in order to eliminate the first grounding parts 331, the present embodiment strengthens the width W 32 of the 3rd electric-conductor 313 ', the total amount of excitation current is improved, to offset the excitation current being attracted by the first grounding parts 331.
In addition, similar to the first embodiment, body 310 ' is corresponding to a resonance length, and resonance length is its 1/3 to 1/5 times of wavelength that receives or launch a radiated wave, is preferably 1/4 times.The current path of the first grounding parts 331 along body 310 ' to feeding portion 320 is resonance length 1/2 times.The relative distance D21 of the second grounding parts 332 and the first grounding parts 331 is resonance length 1/4 times.Whereby, the planar inverted F-shape antenna 300 ' of the present embodiment can pass through the design of the first grounding parts 331 and the second grounding parts 332, and produces the linearly polarized wave of two quadratures, and then inspires the radiated wave of approximate circle polarization.Thin portion operation principle as for the present embodiment, is included in the various embodiments described above, therefore do not repeat them here.
The 3rd embodiment
Fig. 3 C illustrates the structural representation according to the planar inverted F-shape antenna of yet another embodiment of the invention.Please refer to Fig. 3 A and Fig. 3 C, the Main Differences of the 3rd embodiment and previous embodiment is body 310 " width change, the flow direction and the length of current path D13, and the putting in order and set-up mode of feeding portion 320, the first grounding parts 331 and the second grounding parts 332.
Specifically, in the present embodiment, body 310 " comprise one first electric-conductor 311 ", one second electric-conductor 312 " and one the 3rd electric-conductor 313 ".Body 310 " on current path D13 be through terminal A 01, A02 to A06 from load point P33.Planar inverted F-shape antenna 300 " on interelement relative configuration relation, the second end A07 of feeding portion 320 is by corresponding second electric-conductor 312 that is electrically connected of load point P33 ".The first grounding parts 331, the second grounding parts 332 and feeding portion 320 are mutually side by side.In addition, the first grounding parts 331 and the second grounding parts 332 are along towards the second electric-conductor 312 " the direction B1 of first end A03 be arranged in respectively the same side of feeding portion 320.Further, feeding portion 320, the second grounding parts 332 and the first grounding parts 331 are along towards the first electric-conductor 311 " direction B1 be sequentially arranged in the second electric-conductor 312 " same side.
At this, with reference to Fig. 3 C, the first electric-conductor 311 " width be denoted as W13, the second electric-conductor 312 " width be denoted as W23, the 3rd electric-conductor 313 " width be denoted as W33.At this, the 3rd electric-conductor 313 " width W 33 be greater than the first electric-conductor 311 " width W L13, and the second electric-conductor 312 " width W 23 be also greater than the first electric-conductor 311 " width W 13, the 3rd electric-conductor 313 wherein " with the second electric-conductor 312 " the ratio (W33/W23) of width equal 1, and the second electric-conductor 312 " and the 3rd electric-conductor 313 " with respect to the first electric-conductor 311 " the ratio (W23/W13 and W33/W13) of indivedual width between 1.5 to 2.In detail, first grounding parts 331 of the present embodiment and the second grounding parts 332 can have influence on size and the distribution of excitation current, namely the first grounding parts 331 and the second grounding parts 332 can attract the excitation current of part, make to reduce at the excitation current of current path D13.Impact excitation current being caused in order to eliminate the first grounding parts 331 and the second grounding parts 332, the present embodiment strengthens the width W 23 of the second electric-conductor 312 ' and the width W 33 of the 3rd electric-conductor 313 ', the total amount of excitation current is improved, to offset by the excitation current of the first grounding parts 331 and the second grounding parts 332 attractions.
In addition,, body 310 similar to the first embodiment " corresponding to a resonance length, and resonance length is its 1/3 to 1/5 times of wavelength that receives or launch a radiated wave, is preferably 1/4 times.The first grounding parts 331 is along body 310 " to the current path of feeding portion 320 be resonance length 1/2 times.The relative distance D21 of the second grounding parts 332 and the first grounding parts 331 is resonance length 1/4 times.Whereby, the planar inverted F-shape antenna 300 of the present embodiment " can pass through the design of the first grounding parts 331 and the second grounding parts 332, and produce the linearly polarized wave of two quadratures, and then inspire the radiated wave of approximate circle polarization.Thin portion operation principle as for the present embodiment, is included in the various embodiments described above, therefore do not repeat them here.
In sum, the present invention is the design of utilizing two grounding parts, causes planar inverted F-shape antenna in linearly polarized mode, to inspire the radiated wave of approximate circle polarization.Whereby, planar inverted F-shape antenna of the present invention, except having microminiaturized advantage, also can be applicable to global positioning system, the transmission of the radiated wave between electronic product and satellite.
Although the present invention with embodiment openly as above; so it is not in order to limit the present invention; under any, in technical field, have and conventionally know the knowledgeable; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on claims person of defining.
Claims (17)
1. an antenna with double grounding parts, comprising:
One body, corresponding to a resonance length, to receive and dispatch a radiated wave;
One feeding portion, is electrically connected this body;
One first grounding parts, is electrically connected this body, and the current path of this first grounding parts along this body to this feeding portion is this resonance length 1/2 times; And
One second grounding parts, be electrically connected this body, wherein the length of this first grounding parts is greater than the length of this second grounding parts, and there is a relative distance between this second grounding parts and this first grounding parts, wherein this relative distance is the vertical interval between the first end of this second grounding parts and the first end of this first grounding parts, and this vertical interval is this resonance length 1/4 times.
2. antenna according to claim 1, between 1/3 to 1/5 times of the wavelength that wherein this resonance length is this radiated wave.
3. antenna according to claim 1, wherein this body comprises:
One first electric-conductor, has a first end and one second end;
One second electric-conductor, has a first end and one second end, and the first end of this second electric-conductor is electrically connected the first end of this first electric-conductor, and this second electric-conductor is electrically connected this feeding portion, this first grounding parts and this second grounding parts; And
One the 3rd electric-conductor, has a first end and one second end, and the first end of the 3rd electric-conductor is electrically connected the second end of this first electric-conductor.
4. antenna according to claim 3, wherein this second electric-conductor is electrically connected this feeding portion by a load point, and this load point to the current path of the second end of the 3rd electric-conductor is this resonance length.
5. antenna according to claim 3, wherein this first grounding parts and this second grounding parts are arranged in respectively the same side of this feeding portion along the direction of the second end towards this second electric-conductor, and the width of this first electric-conductor, the width of this second electric-conductor and the width of the 3rd electric-conductor are equal to each other.
6. antenna according to claim 3, wherein this first grounding parts and this second grounding parts are arranged on respectively the dual-side of this feeding portion, and the width of the 3rd electric-conductor is greater than the width of this second electric-conductor, and the width of the 3rd electric-conductor is greater than the width of this first electric-conductor.
7. antenna according to claim 6, wherein the ratio of the width of the 3rd electric-conductor and this second electric-conductor is between 1.5 to 2.
8. antenna according to claim 3, wherein this first grounding parts and this second grounding parts are arranged in respectively the same side of this feeding portion along the direction of the first end towards this second electric-conductor, and the width of this second electric-conductor and the 3rd electric-conductor is greater than respectively the width of this first electric-conductor, and the ratio of the width of the 3rd electric-conductor and this second electric-conductor equals 1.
9. antenna according to claim 8, wherein the width of this second electric-conductor and the 3rd electric-conductor with respect to the ratio of the width of this first electric-conductor respectively between 1.5 to 2.
10. antenna according to claim 1, wherein this first with this second grounding parts in order to adjust the impedance matching of this antenna, and this antenna inspires the linearly polarized wave of two quadratures by this first grounding parts and this second grounding parts, and then produces this radiated wave.
11. antennas according to claim 1, wherein this antenna is suitable for receiving or launching this radiated wave from a global positioning system.
12. 1 kinds of antennas with double grounding parts, comprising:
One body, has a load point, to extend a resonance length, receives or launches a radiated wave;
One feeding portion, is electrically connected this body by this load point; And
One first and one second grounding parts, with this feeding portion mutually side by side, and be electrically connected this body, wherein the current path of this first grounding parts along this body to this feeding portion is this resonance length 1/2 times, the length of this first grounding parts is greater than the length of this second grounding parts, and there is a relative distance between this first grounding parts and this second grounding parts, wherein this relative distance is the vertical interval between the first end of this second grounding parts and the first end of this first grounding parts, and this vertical interval is this resonance length 1/4 times.
13. antennas according to claim 12,1/3 to 1/5 times of the wavelength that wherein this resonance length is this radiated wave.
14. antennas according to claim 12, wherein this body comprises:
One first electric-conductor, has a first end and one second end;
One second electric-conductor, has this load point, and be electrically connected this first electric-conductor first end, this feeding portion, this first with this second grounding parts; And
One the 3rd electric-conductor, be electrically connected the second end of this first electric-conductor, and this second electric-conductor is this resonance length from this load point to the formed current path of the 3rd electric-conductor.
15. antennas according to claim 14, wherein this second grounding parts, this first grounding parts and this feeding portion are sequentially arranged in the same side of this second electric-conductor along the direction towards this first electric-conductor, and the width of this first electric-conductor, the width of this second electric-conductor and the width of the 3rd electric-conductor are equal to each other.
16. antennas according to claim 14, wherein this second grounding parts, this feeding portion and this first grounding parts are sequentially arranged in the same side of this second electric-conductor along the direction towards this first electric-conductor, and this first grounding parts and this second grounding parts are arranged on respectively the dual-side of this feeding portion, and the width of the 3rd electric-conductor is greater than the width of this second electric-conductor, and the width of the 3rd electric-conductor is greater than the width of this first electric-conductor.
17. antennas according to claim 14, wherein this feeding portion, this second grounding parts and this first grounding parts are sequentially arranged in the same side of this second electric-conductor along the direction towards this first electric-conductor, and the width of this second electric-conductor and the 3rd electric-conductor is greater than respectively the width of this first electric-conductor, and the ratio of the width of the 3rd electric-conductor and this second electric-conductor equals 1.
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| CN200910004645.1A CN101826661B (en) | 2009-03-02 | 2009-03-02 | Antenna with double grounding parts |
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| CN200910004645.1A CN101826661B (en) | 2009-03-02 | 2009-03-02 | Antenna with double grounding parts |
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|---|---|---|---|---|
| CN1601807A (en) * | 2003-09-26 | 2005-03-30 | 富士康(昆山)电脑接插件有限公司 | Plane reverse F-shape antenna and its mfg method |
| CN1682454A (en) * | 2002-09-10 | 2005-10-12 | 摩托罗拉公司 | Dual grounded internal antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6980154B2 (en) * | 2003-10-23 | 2005-12-27 | Sony Ericsson Mobile Communications Ab | Planar inverted F antennas including current nulls between feed and ground couplings and related communications devices |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1682454A (en) * | 2002-09-10 | 2005-10-12 | 摩托罗拉公司 | Dual grounded internal antenna |
| CN1601807A (en) * | 2003-09-26 | 2005-03-30 | 富士康(昆山)电脑接插件有限公司 | Plane reverse F-shape antenna and its mfg method |
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| Publication number | Publication date |
|---|---|
| CN101826661A (en) | 2010-09-08 |
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