CN203103496U - High Directivity Antenna Module - Google Patents

Abstract

The utility model relates to an antenna module of high directive property, include: the electromagnetic energy gap structure comprises a carrier, a first radiator, a second radiator, an electromagnetic energy gap, an electrode part, an electric connection part and a pattern layer; the first radiator and the second radiator are arranged in the carrier, the electromagnetic energy gap is arranged in the carrier and is positioned below the second radiator, the electrode part is arranged on the top surface and the bottom surface of the carrier, and the electric connection part is arranged on the two side surfaces of the carrier and is electrically connected with the electrode part, the first radiator and the second radiator. The utility model provides an antenna module, its electric connection is on the base plate of no headroom to with the coupling relation cooperation modulation that the part parallel of this first irradiator and this second irradiator overlapped, reach predetermined target impedance, resonant frequency, bandwidth and radiation effect, can effectively reduce antenna size and reduce the injury of SAR value to the human body.

Description

High Directivity Antenna Module

technical field

The utility model relates to an antenna, especially an antenna module with high directivity that does not require a clear space.

Background technique

The positioning method of GPS (Global Positioning System) is to use the basic triangulation positioning principle to measure the distance by measuring the transmission time of radio signals, and then use more than three satellites for cross-comparison, and simultaneously convert the satellites obtained by the signal receiving speed and time Distance, with the built-in electronic map in the GPS receiver for azimuth identification.

At present, in addition to the vehicle-mounted GPS system combined with the in-car audio-visual system, the satellite navigation system for vehicles has also developed a variety of GPS products such as portable PDA (handheld computer), Notebook (notebook), and mobile phones, among which are closely related to consumers. There is nothing better than portable car GPS. For car owners whose vehicles are not equipped with original GPS, it is indeed a good choice to choose a portable car GPS, because in addition to being more affordable, its portable feature allows users to take it out of the car and use it, even if It can also be used for changing cars in the future.

Traditional portable GPS systems all have a built-in receiving antenna structure for receiving GPS signals. The receiving antenna structure of this GPS system is a pin type flat antenna, as shown in FIG. 1A and FIG. 1B . The antenna 100 has a substrate 101 of ceramic material, the surface of the substrate 101 has a radiating metal sheet 102, the bottom surface of the substrate 101 has a grounding metal sheet 103, the substrate 101, the radiating metal sheet 102 and the grounding metal sheet 103 are provided with A through hole 104 passes through the through hole 104 to provide a T-shaped signal feeding body 105 to form a planar antenna structure that can be assembled on the motherboard 200 . However, this kind of pin antenna has a large volume and cannot be installed on a new generation of light, thin and small portable electronic devices.

Utility model content

In view of this, the purpose of the present invention is to provide a highly directivity antenna module.

In order to achieve the above purpose, the utility model provides a high directivity antenna module, including:

A carrier having at least one top surface, one bottom surface and two side surfaces;

A first radiator, which is arranged inside the carrier and adjacent to the top surface, and has a first end and a second end on the first radiator;

A second radiator, which is disposed inside the carrier, below the first radiator and adjacent to the top surface of the carrier, and has a third end and a fourth end on the second radiator;

an electromagnetic energy gap, which is set inside the carrier and is located below the second radiator and adjacent to the top surface;

an electrode portion disposed on the top surface and the bottom surface;

an electrical connection part, which is arranged on two side surfaces of the carrier, and electrically connects the electrode part, the second end part of the first radiator and the fourth end part of the second radiator;

Wherein, part of the first radiator and the second radiator overlap in parallel, and the first end of the first radiator and the third end of the second radiator are set inside the carrier in opposite directions, and The frequency is adjusted according to the coupling relationship of the parallel overlapping of the radiators.

Preferably, the carrier is a rectangular semiconductor chip antenna composed of multi-layer ceramic substrate or glass fiber board.

Preferably, the first radiator is a sheet made of metal.

Preferably, the second radiator is a flake made of metal.

Preferably, the electromagnetic energy gap is a flake made of metal material.

Preferably, the electrode part is a member made of metal material, and is composed of an upper electrode part and a lower electrode part, the upper electrode part is arranged on the top surface, and the lower electrode part is arranged on the bottom surface.

Preferably, the electrical connection part is a member made of metal material, consisting of a first electrical connection part and a second electrical connection part, the first electrical connection part electrically connects the top surface and the bottom surface The upper electrode portion and the lower electrode portion, the second electrical connection portion electrically connects the upper electrode portion and the lower electrode portion on the other side of the top surface and the bottom surface.

Preferably, parts of the first radiator and the second radiator are in a parallel overlapping coupling relationship, and the frequency can be controlled or adjusted by the coupling area and coupling distance.

Preferably, it further includes a pattern layer, the pattern layer is arranged on the top surface of the carrier, and the pattern layer is a pattern of a model number and a company logo.

Preferably, it further includes a substrate, at least one surface of the substrate has a first metal layer and a first hollow part, and the first metal layer on both sides of the first hollow part has a first contact and a second A contact, one side of the first contact is electrically connected with a microstrip feed-in line, the microstrip feed-in line is composed of a first microstrip feed-in line and a second microstrip feed-in line, the microstrip feed-in line Each of the two sides has a second hollow part separated from the first metal layer.

Preferably, the lower electrode portion on the bottom surface of the carrier is electrically connected to the first contact point and the second contact point of the first metal layer, and the electrical connection between the first microstrip feed-in line and the second microstrip feed-in line A coupling element is electrically connected to the second microstrip feed-in line, and a copper axis cable is electrically connected to the second microstrip feed-in line.

Preferably, it further includes a substrate, the front surface of the substrate has a first metal layer and a first hollow part, and the first metal layer on both sides of the first hollow part has a first contact and a second contact, One side of the first contact point is electrically connected to a microstrip feed-in line, the microstrip feed-in line is composed of a first microstrip feed-in line and a second microstrip feed-in line, the two sides of the microstrip feed-in line each has a second hollow part separated from the first metal layer; and the back of the substrate has a second metal layer.

Preferably, the lower electrode part on the bottom surface of the carrier is electrically connected to the first contact and the second contact of the first metal layer, and corresponds to the third hollow part on the back of the substrate, and the first microstrip feed-in line and A coupling element is electrically connected between the second microstrip feed-in lines, and a copper-axis cable is electrically connected to the second microstrip feed-in lines.

The antenna module with high directivity provided by the utility model utilizes the parallel overlapping of the radiators of the two antennas to carry out the coupling relationship and the structural design of reflecting and receiving signal waves, which can increase the directivity of the antenna, increase the radiation efficiency of the antenna and reduce the size of the antenna. It can relatively reduce the SAR value, reduce the damage of antenna radiation to the human body, and does not require a clear space. When the antenna module is close to metal objects or close to metal objects, it can avoid being interfered by metal objects.

Description of drawings

FIG. 1A is a three-dimensional schematic diagram of the appearance of a flat panel antenna structure used in a traditional GPS;

FIG. 1B is a schematic side view of a flat panel antenna structure used in a traditional GPS;

Figure 2 is a three-dimensional schematic diagram of the appearance of the high directivity antenna module of the present invention;

Fig. 3 is a schematic side sectional view of the antenna module with high directivity of the present invention;

Fig. 4 is the schematic diagram of the substrate of the present utility model;

5 is a schematic diagram of the combination of the antenna module and the substrate of the present invention;

Fig. 6 is a schematic diagram of the radiation field pattern of the XZ plane of the antenna module of the present invention at 1.575GHZ;

Fig. 7 is a schematic diagram of the radiation field pattern of the YZ plane when the antenna module of the present invention is at 1.575GHZ;

Fig. 8 is a schematic diagram of the radiation field pattern of the XY plane when the antenna module of the present invention is at 1.575GHZ;

Fig. 9 is a comparative schematic diagram of the reflection coefficient of the antenna module of the present invention;

Fig. 10 is a schematic diagram of the radiation field pattern of the XZ plane of the antenna module of the present invention at 2.48;

Fig. 11 is a schematic diagram of the radiation field pattern of the YZ plane of the antenna module of the present invention at 2.48GHZ;

Fig. 12 is a schematic diagram of the radiation field pattern of the XY plane of the antenna module of the present invention at 2.48GHZ;

Fig. 13 is a schematic front view of the application of the antenna module of the present invention on a substrate with a clearance area;

Figure 14 is a schematic diagram of the application of the antenna module of the present invention on the back of the substrate with a clearance area;

FIG. 15 is a schematic diagram showing the comparison of reflection coefficients of the antenna module of the present invention used in areas with clearance and areas without clearance.

[Description of main component symbols]

Carrier-1; Antenna Module-10; Antenna-100; Substrate-101; Radiating Metal Sheet-102; Grounding Metal Sheet-103; side - 13;

The first radiator-2; the motherboard-200; the first end-21; the second end-22;

The second radiator-3; the third end-31; the fourth end-32;

Electromagnetic gap-4;

Electrode part-5; Upper electrode part-51; Lower electrode part-52;

Electrical connection part-6; first electrical connection part-61; second electrical connection part-62;

pattern_layer-7;

Substrate-8; first metal layer-81; first contact-811; second contact-812; first hollow-82; microstrip feed-in line-83; first microstrip feed-in-line-831; Microstrip feed-in line-832; second hollow part-84; second metal layer-85; third hollow part-86.

Detailed ways

Relevant technical contents and detailed description of the utility model are described as follows now in conjunction with the accompanying drawings.

Please refer to FIG. 2 and FIG. 3 , which are three-dimensional and side-sectional diagrams of the high directivity antenna module of the present invention. As shown in the figure: the high directivity antenna module 10 of the present utility model includes: a carrier 1, a first radiator 2, a second radiator 3, an electromagnetic energy gap 4, an electrode part 5, a The electrical connection part 6 and a pattern layer 7 .

The carrier 1 is a rectangular semiconductor chip antenna composed of multilayer ceramic substrates or glass fiber boards, and has at least a top surface 11 , a bottom surface 12 and two side surfaces 13 .

The first radiator 2 is a sheet-shaped body made of metal material, which is arranged inside the carrier 1 adjacent to the top surface 11, and the first radiator 2 has a first end 21 and a second end. Section 22.

The second radiator 3 is a plate-shaped body made of metal material, which is disposed inside the carrier 1 , below the first radiator 2 and adjacent to the top surface 11 of the carrier 1 . The second radiator 3 has a third end portion 31 and a fourth end portion 32 . The first radiator 2 and part of the second radiator 3 are in a parallel overlapping coupling relationship, so that the first end 21 of the first radiator 2 and the third end 31 of the second radiator 3 It is set up inside the carrier 1 in the opposite direction.

The electromagnetic band-gap (EBG) 4 is a sheet-shaped body made of metal material, which is disposed inside the carrier 1 below the second radiator 3 and adjacent to the top surface 11 . The electromagnetic energy gap 4 can reflect and receive signals for the first radiator 2 and the second radiator 3 to receive, which can increase the directivity of the antenna, increase the radiation efficiency of the antenna and reduce the size of the antenna, relatively can reduce the SAR value, and reduce the impact of antenna radiation on the antenna. human injury.

The electrode part 5 is a member made of metal material, which is composed of an upper electrode part 51 and a lower electrode part 52 . The upper electrode part 51 is arranged on the top surface 11 of the carrier 1, and the lower electrode part 52 is arranged on the bottom surface 12 of the carrier 1. The lower electrode part 52 is used for the antenna module to be surface-bonded on the substrate (not shown in the figure). superior.

The electrical connection portion 6 is a component made of metal material, which is composed of a first electrical connection portion 61 and a second electrical connection portion 62 , and is disposed on two side surfaces 13 of the carrier 1 . The first electrical connection portion 61 is electrically connected to the upper electrode portion 51 on the right side, the fourth end portion 32 of the second radiator 3 and the lower electrode portion 52 on the right side. The second electrical connection portion 62 is electrically connected to the upper electrode portion 51 on the left side, the second end portion 22 of the first radiator 2 and the lower electrode portion 52 on the left side.

The pattern layer 7 is arranged on the top surface 11 of the carrier 1 , and the pattern layer 7 can be printed with patterns of antenna models and company trademarks.

The above-mentioned coupling relationship of the first radiator 2 and the partial parallel overlap of the second radiator 3 is based on the coupling area and coupling distance relationship of the radiator to form two coupling capacitors that are coordinated and modulated (such as adjusting the size of the two coupling capacitors) To control the frequency level, it can be applied to 2.4GHZ or 1.575GHZ antenna), so as to achieve the predetermined target impedance, resonance frequency, bandwidth and radiation effect, and can effectively reduce the size of the antenna.

Please refer to FIG. 4 and FIG. 5 , which are front and back schematic diagrams of the combination of the substrate and the antenna module of the present invention. As shown in the figure: when the high directivity antenna module 10 of the present invention is in use, the antenna module 10 is electrically connected to a substrate 8 with no clearance area for illustration.

The substrate 8 has a first metal layer 81 and a first hollow portion 82 on the front surface, and the first metal layer 81 on both sides of the first hollow portion 82 has a first contact 811 and a second contact 812 . One side of the first contact 811 is electrically connected to a microstrip feed-in line 83, which is composed of a first microstrip feed-in line 831 and a second microstrip feed-in line 832. Two sides of the incoming line 83 respectively have a second hollow portion 84 separated from the first metal layer 81 . In addition, the back surface of the substrate 8 has a second metal layer 85 , and there is no clearance area on the second metal layer 85 .

When the antenna module 10 is electrically connected to the substrate 8, the right and left lower electrode portions 52 on the bottom surface 11 of the carrier 1 of the antenna module 10 are electrically connected to the first contact of the first metal layer 81. 811 and the second contact 812. A coupling element (not shown) is electrically connected between the first microstrip feed-in line 831 and the second microstrip feed-in line 832, and a copper is electrically connected to the second microstrip feed-in line 832. Shaft cables (not shown in the figure).

After the antenna module 10 receives the signal, it is transmitted to the microstrip feed-in line 83 through the second contact 812, and is transmitted to the copper axis cable (not shown) by the microstrip feed-in line 83, so that Copper cables carry the signal to the motherboard of the device (not shown).

Please refer to FIG. 6 , which is a schematic diagram of the radiation field pattern on the XZ plane of the antenna module of the present invention at 1.575 GHZ. As shown in the figure: when the frequency is 1.575GHZ, the main lobe magnitude (Main lobe magnitude) is 3.3dBi, the main lobe direction (Main lobe direction) is 2.0deg, and the angular width (Angular width) is 93.0 deg when it is 3dB , the side lobe level is at -3.0dB.

Please refer to FIG. 7 , which is a schematic diagram of the radiation field pattern of the YZ plane of the antenna module of the present invention at 1.575 GHZ. As shown in the figure: when the frequency is 1.575GHZ, the main lobe magnitude (Main lobe magnitude) is 3.6dBi, the main lobe direction (Main lobe direction) is 26.0deg, and the angular width (Angular width) is 222.8 deg when it is 3dB .

Please refer to FIG. 8 , which is a schematic diagram of the XY plane radiation pattern of the antenna module of the present invention at 1.575 GHz. As shown in the figure: when the frequency is 1.575GHZ, the main lobe magnitude (Main lobe magnitude) is 2.7dBi, the main lobe direction (Main lobe direction) is 273.0deg, and the angular width (Angular width) is 116.2 deg when it is 3dB , the side lobe level is -4.5dB.

Please refer to FIG. 9 , which is a schematic diagram of comparison of reflection coefficients of the antenna module of the present invention. As shown in the figure: S1 frequency is -13.438dB at 1.456GHZ, S2 frequency is -12.416dB at 1.4749GHZ, S3 frequency is -12.096dB at 1.4953GHZ, S4 frequency is -11.842dB at 1.5278GHZ, S5 The frequency is -10.974dB at 1.5814GHZ, the S6 frequency is -10.85dB at 1.5957GHZ, the S7 frequency is -10.491dB at 1.626GHZ, the S8 frequency is -9.9802dB at 1.6579GHZ, and the S9 frequency is 1.6925GHZ -9.6347dB.

Please refer to FIG. 10 , which is a schematic diagram of the radiation field pattern on the XZ plane of the antenna module of the present invention at 2.48. As shown in the figure: when the frequency is 2.48GHZ, the main lobe magnitude (Main lobe magnitude) is 1.9dBi, the main lobe direction (Main lobe direction) is 19.0deg, and the angular width (Angular width) is 180.0 deg at 3dB .

Please refer to FIG. 11 , which is a schematic diagram of the radiation field pattern of the YZ plane of the antenna module of the present invention at 2.48GHZ. As shown in the figure: when the frequency is 2.48GHZ, the main lobe magnitude (Main lobe magnitude) is 1.5dBi, the main lobe direction (Main lobe direction) is 4.0deg, and the angular width (Angular width) is 151.6 deg when it is 3dB , the side lobe level is -4.2dB.

Please refer to FIG. 12 , which is a schematic diagram of the XY plane radiation pattern of the antenna module of the present invention at 2.4GHZ. As shown in the figure: when the frequency is 2.48GHZ, the main lobe magnitude (Main lobe magnitude) is 0.6dBi, the main lobe direction (Main lobe direction) is 327.0deg, and the angular width (Angular width) is 216.5deg when it is 3dB , the side lobe level is -4.2dB.

Please refer to Fig. 13, Fig. 14, and Fig. 15, which are schematic diagrams comparing the reflection coefficients of the antenna module of the present invention applied on the front and back of the substrate with clearance area and the antenna module applied in the clearance area and no clearance area. As shown in the figure: when the antenna module 10 is electrically connected to a first metal surface 81 on the front side of the substrate 8, the antenna module 10 has a second metal layer 85 and a third metal layer 85 corresponding to the back side of the substrate 8. The hollow part 86 , the third hollow part 86 is a clearance area and corresponds to the antenna module 10 .

The frequency of the antenna is greatly affected by the use of the clearance area or not, so the utility model has made a comparison with or without the clearance area. When the headroom size is 5×4㎜, the frequency is 1.8822 GHZ, -18.6dB. When the headroom size is 5×2㎜, the frequency is 2.2145 GHZ, -10.9dB. When the headroom size is 5×6㎜, the frequency is 1.6465 GHZ, -10.7dB. When there is no headroom, the frequency is 2.4734 GHZ, -7.9dB.

The above is only a preferred embodiment of the utility model, and is not intended to limit the scope of protection of the utility model patent. Other equivalent changes made by using the spirit of the utility model patent should all belong to the utility model patent in the same way. protected range.

Claims (12)

1. the antenna modules of a high directivity is characterized in that, comprising:

One carrier has an end face, a bottom surface and two side faces at least on it;

One first radiant body, it is located at this carrier inside neighbour end face, has a first end and the second end on this first radiant body;

One second radiant body, it is located at this carrier inside and is positioned at the end face of this first radiant body below and this carrier of neighbour, has one the 3rd end and one the 4th end on this second radiant body;

One electromagnetic band gap, it is located at this carrier inside and is positioned at this second radiant body below and neighbour's end face;

One electrode part, it is located at this end face and bottom surface;

One electrical connection section, it is located on the two side faces of this carrier, and electrically connect electrode part, the second end of first radiant body and the 4th end of second radiant body;

Wherein, the partial parallel of this first radiant body and this second radiant body is overlapping, and the 3rd end of the first end of this first radiant body and this second radiant body is and is built up in the other direction this carrier inside.

2. antenna modules as claimed in claim 1 is characterized in that, this carrier is the ceramic substrate of multilayer or the rectangular semiconductor antenna component that glass mat is formed.

3. antenna modules as claimed in claim 2 is characterized in that, the plates of this first radiant body for being made by metal material.

4. antenna modules as claimed in claim 3 is characterized in that, the plates of this second radiant body for being made by metal material.

5. antenna modules as claimed in claim 4 is characterized in that, the plates of this electromagnetic band gap for being made by metal material.

6. antenna modules as claimed in claim 5 is characterized in that, the member of this electrode part for making by metal material, by a top electrode portion and once electrode part form, this top electrode portion is located at this end face, this bottom electrode portion is located on this bottom surface.

7. antenna modules as claimed in claim 6, it is characterized in that, the member of this electrical connection section for making by metal material, form by one first electrical connection section and one second electrical connection section, this top electrode portion of this this end face of first electrical connection section electrically connect and this bottom surface one side and this bottom electrode portion, this top electrode portion of this this end face of second electrical connection section electrically connect and this bottom surface opposite side and this bottom electrode portion.

8. antenna modules as claimed in claim 7 is characterized in that, more includes a patterned layer, and this patterned layer is located on the end face of this carrier.

9. antenna modules as claimed in claim 8, it is characterized in that, more include a substrate, have a first metal layer and one first hollow-out parts at least one surface of this substrate, have one first contact and one second contact on the first metal layer of these first hollow-out parts both sides, one side electrically connect of this first contact has a little band feed-in line, this little band feed-in line is made up of first little band feed-in line and second little band feed-in line, respectively has second hollow-out parts of separating with this first metal layer on the both sides of this little band feed-in line.

10. antenna modules as claimed in claim 9, it is characterized in that, the bottom electrode portion electrically connect of this carrier bottom surface is on first contact and second contact of this first metal layer, electrically connect has a coupling element between this first little band feed-in line and this second little band feed-in line, and electrically connect has a coaxial cable line on this second little band feed-in line.

11. antenna modules as claimed in claim 8, it is characterized in that, more include a substrate, have a first metal layer and one first hollow-out parts on this substrate front side, have one first contact and one second contact on the first metal layer of these first hollow-out parts both sides, one side electrically connect of this first contact has a little band feed-in line, this little band feed-in line is made up of first little band feed-in line and second little band feed-in line, respectively has second hollow-out parts of separating with this first metal layer on the both sides of this little band feed-in line; And this substrate back has one second metal level.

12. antenna modules as claimed in claim 11, it is characterized in that, the bottom electrode portion electrically connect of this carrier bottom surface is on first contact and second contact of this first metal layer, and to the 3rd hollow-out parts that should substrate back, electrically connect one coupling element between this first little band feed-in line and this second little band feed-in line, and electrically connect has a coaxial cable line on this second little band feed-in line.

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