CN101777702B - Antenna Devices and Antennas - Google Patents

Abstract

An antenna comprises a grounding part, a T-shaped radiation part, a first feed-in arm and a second feed-in arm. The radiation part comprises a short circuit section, a first radiation section and a second radiation section, wherein the short circuit section extends upwards from the grounding part, and the first radiation section and the second radiation section respectively extend towards two opposite directions from a section of the short circuit section away from the grounding part; the first feed-in arm comprises a first section which is adjacent to the first radiation section at intervals, and a first feed-in section which is adjacent to the grounding section at intervals and can be used for feeding signals; the second feed-in arm comprises a second section which is adjacent to the second radiation section at intervals, and a second feed-in section which is adjacent to the grounding section at intervals and can be used for feeding signals.

Description

Antenna Devices and Antennas

technical field

The invention relates to an antenna, in particular to a composite antenna applicable to different frequency bands.

Background technique

At present, there are many different wireless communication technologies on the market, which can be roughly divided into: (1) Wireless Wide Area Network [Wireless Wide Area Network, the frequency band is 824~ 960MHz and 1710-2170MHz, referred to as WWAN]. (2) The communication range can cover the wireless local area network [Wireless Local Area Network, the frequency band is 2412-2462MHz (802.11b/g) and 4900-5875MHz (802.11a), referred to as WLAN] about 100 meters from the access point to the user terminal.

Referring to Fig. 1 and Fig. 2, a notebook computer 9 covering the above-mentioned various communication frequency bands usually installs various antennas 91, 92 in the area 90 of the notebook computer 9, in addition, the corresponding signal feeder 93 , 94 are arranged in the area 90, and are connected to these antennas 91, 92, respectively.

Since notebook computers strive to be thin and light, the antenna must meet the antenna performance without taking up too much space, and the signal feeder should be as short as possible to free up more space in the notebook computer and save costs .

Contents of the invention

Therefore, the object of the present invention is to provide an antenna which is small in size and applicable to at least two different communication standards.

Therefore, the antenna of the present invention includes a grounding portion, a T-shaped radiation portion, a first feeding arm and a second feeding arm. The radiating section includes a short-circuit section extending upward from the ground section, and a first radiating section and a second radiating section respectively extending in two opposite directions from the end of the short-circuit section away from the ground section; the first feeding The arm includes a first segment adjacent to the first radiating segment at intervals, and a first feed segment adjacent to the ground portion at intervals and capable of feeding signals; the second feed arm includes a segment adjacent to the first segment at intervals The second segment of the two radiating segments, and a second feed-in segment adjacent to the ground part at intervals and available for signal feed-in.

Preferably, the first feeding section of the first feeding arm is farther away from the first radiation section than the first section, and the second feeding section of the second feeding arm is farther away from the first section than the second section. a radiation segment.

Another object of the present invention is to provide an antenna in which the signal feeder can be connected to the outermost side of the antenna to reduce the length of the signal feeder.

The first feeding arm is in an inverted L shape, the first section and the first radiating section extend substantially along the same straight line, and the first feeding section is from the end of the first section away from the first radiating section to the The direction of the grounding part extends; and the second feeding arm is in an inverted L shape, and the second section and the second radiation section generally extend along the same straight line, and the second feeding section is formed by the second section An end away from the second radiating section extends toward the grounding portion.

Yet another object of the present invention is that the antenna of the present invention can not only resonate with the high-frequency bands in different communication standards except the aforementioned first feeding arm, the second feeding arm and the radiating part, but also be compatible with the low-frequency bands in these communication standards. resonance.

More preferably, the antenna of the present invention may further include a first parasitic arm and a second parasitic arm; one end of the first parasitic arm is connected to the ground part, and along the short-circuit section, the first radiating section and the second parasitic arm, A feeding arm extends parallel to the second feeding arm; one end of the second parasitic arm is connected to the ground portion, and extends along the short-circuit section, the second radiating section and the second feeding arm in parallel; the first parasitic arm The second parasitic arm and the second parasitic arm each have an inverted L shape and are respectively located on opposite sides of the short-circuit section.

The effect of the present invention is to use the short-circuit section of the antenna to realize that the left and right parts of the antenna can be effectively applied to two different communication standards respectively, and maintain a good isolation (Isolation), so that the left and right will not interfere with each other In addition, the antenna of the present invention uses the first and second feed-in sections on both sides as signal feed-in, so that the signal feed-in line connecting the antenna can minimize the space occupied in a notebook computer or any electronic communication device.

Description of drawings

FIG. 1 is a schematic diagram of a traditional notebook computer;

Fig. 2 is a schematic diagram of an antenna device in a traditional notebook computer;

3 is a schematic diagram of a preferred embodiment of the antenna device of the present invention installed in a notebook computer;

Figure 4 is a front view of the antenna device;

Fig. 5 shows the front view of the substrate of the antenna and each element on its surface;

6 is a measurement data diagram of the voltage standing wave ratio (VSWR) of the antenna in the wireless wide area network (WWAN for short) frequency band of the present embodiment;

7 is a measurement data diagram of the voltage standing wave ratio (VSWR) of the antenna in the wireless area network (WLAN for short) frequency band of the present embodiment;

FIG. 8 is a measurement data diagram of the isolation (Isolation) of the antenna in the WWAN frequency band in this embodiment;

Figure 9, Figure 10 and Figure 11 are the measurement results of the radiation pattern in the xy plane, xz plane, yz plane and three-dimensional when the antenna works at 880MHz, 1850MHz and 2110MHz in WWAN respectively; and

Figure 12 and Figure 13 show the measurement results of the radiation pattern in the xy plane, xz plane, yz plane and three-dimensional when the antenna works at 2437MHz and 5470MHz in the WLAN.

Description of main component symbols

10 antenna assembly

101 Antenna

1 first feed arm

11 first paragraph

12 First feed-in section

2 Second feed arm

21 second paragraph

22 Second feed-in section

3 radiation department

31 The first radiation section

32 Second radiating segment

33 short circuit

4 ground part

41 First grounding segment

42 Second ground segment

43 Ground foil

5 Substrate

51 surface

61 First feeder

62 Second feeder

71 First parasitic arm

72 Second parasitic arm

8 laptops

80 area

81, 83 high frequency resonant frequency band

82, 84 low frequency resonant band

detailed description

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings.

Referring to FIGS. 3 and 4 , FIG. 3 is a schematic view of the antenna device 10 installed in the notebook computer 8 , and FIG. 4 is a front view of the antenna device 10 . The preferred embodiment of the antenna device 10 of the present invention is installed in the area 80 of the notebook computer 8, and includes an antenna 101, the first feeder 61 and the second feeder 62 that are individually connected to both sides of the antenna 101, and are located on the notebook computer. 8 and is used as the grounding part 4 for system grounding. The antenna 101 then includes a substrate 5 with a surface 51, a first ground section 41, a second ground section 42, a part of which is arranged on the substrate 5 and used for grounding, and a T-shaped radiating element arranged on the surface 51 of the substrate 5. part 3 , a first feeding arm 1 and a second feeding arm 2 respectively connected to the first feeding line 61 and the second feeding line 62 , and a first parasitic arm 71 and a second parasitic arm 72 . In this embodiment, the grounding part 4 includes the grounding metal foil 43 used as the system grounding of the notebook computer 8 , and the first and second grounding sections 41 and 42 arranged on the surface 51 of the substrate 5 .

Referring to FIG. 4 , the first ground segment 41 of the antenna 101 extends from the lower left corner of the substrate 5 to the center, and the left end of the first ground segment 41 is connected to the signal negative end of the first feeder 61 , and the second ground segment 42 is It extends from the lower right corner of the substrate 5 to the center, and the right end of the second ground segment 42 is connected to the signal negative end of the second feeder 62 .

The radiation part 3 includes a short-circuit section 33 extending upward from the end of the first ground section 41 close to the center of the substrate 5 , and a first radiation section extending leftward and rightward respectively from the end of the short-circuit section 33 away from the first ground section 41 31 and a second radiating section 32, the radiating portion 3 is generally T-shaped.

The first feeding arm 1 is in an inverted L shape, and includes a first section 11 adjacent to the first radiating section 31 at intervals, and a first feeding section 12 connected to the positive signal end of the first feeding line 61; The first section 11 and the first radiating section 31 extend substantially along the same straight line, and the first feeding section 12 extends from the end of the first section 11 away from the first radiating section 31 to the first grounding section 41, And it is connected with the first feeder 61 to one end adjacent to the first ground segment 41 at intervals.

The second feeding arm 2 is also in an inverted L shape, and includes a second section 21 adjacent to the second radiating section 32 at intervals, and a second feeding section 22 connected to the signal positive end of the second feeding line 62; The second section 21 and the second radiating section 32 extend substantially along the same straight line, and the second feeding section 22 extends from the end of the second section 21 away from the second radiating section 32 to the second grounding section 42, And the second feeder 62 is connected to one end adjacent to the second ground segment 42 at intervals.

It is worth mentioning that since the first feeder arm 1 and the second feeder arm 2 are respectively connected to the first feeder 61 and the second feeder 62 on the left and right sides of the antenna 101, the present embodiment shown in FIG. 2, it can be seen that the first and second feeder lines 61, 62 of this embodiment do not need to extend the signal feeder lines 93, 94 in the area 80 of the notebook computer 8 as traditionally, and the available space in the area 80 is therefore More than 90 in the traditional area.

One end of the first parasitic arm 71 of the antenna 101 is connected to the first ground segment 41, and extends along the short-circuit segment 33, the first radiation segment 31 and the first feeding arm 11 in parallel; and one end of the second parasitic arm 72 is connected to the first feeding arm 11. The first ground section 41 is connected and extends along the short-circuit section 33, the second radiating section 32 and the second section 21 of the second feeding arm 2 in parallel; the first parasitic arm 71 and the second parasitic arm 72 are respectively located The opposite sides of the short-circuit section 33 are each in an inverted L-shape with bilateral symmetry.

Please refer to FIG. 5 for the actual size of this embodiment. FIG. 5 is a front view of the substrate 5 and its surface 51. The unit of the numbers in the figure is mm. You can refer to various data to know the actual specifications of this embodiment. size.

Referring to FIG. 6 , FIG. 6 is a measurement data diagram of the voltage standing wave ratio (VSWR) of the antenna 101 in the wireless wide area network (Wireless Wide Area Network, WWAN for short) frequency band of this embodiment. It can be known from experiments that the measured VSWR values of the antenna 101 are lower than 4 in the frequency bands of 824-960 MHz and 1710-2170 MHz, which meets the basic requirement of the radiation performance of the antenna. Among them, the second feeding arm 2, the second radiating section 32, the short-circuit section 33 and the second grounding section 42 jointly contribute the high-frequency resonant frequency band 81 between 1710-2170 MHz, and the second parasitic arm 72 contributes the low-frequency between 824-960 MHz The resonant frequency band 82, so this embodiment can indeed be applied in the wireless wide area network frequency band.

Cooperate with Table 1, Table 1 shows the efficiency (Efficiency) of the total radiation energy (Total Radiation Power) received (Rx column in Table 1) and transmitted (Tx column in the table) by antenna 101 in the WWAN application frequency band, in each The frequency (unit: MHz) is greater than -5.4dB, that is, greater than 28%, which can meet the work requirements.

Table 1

Referring to FIG. 7 , FIG. 7 is a measurement data diagram of the voltage standing wave ratio (VSWR) of the antenna 101 in the wireless area network (Wireless Local Area Network, WLAN for short) frequency band of this embodiment. It can be known from experiments that the VSWR measurement values of the antenna 101 are lower than 3 in the frequency bands of 2412-2462 MHz and 4900-5875 MHz, which meets the basic requirement of the radiation efficiency of the antenna. Among them, the first feeding arm 1, the first radiating section 31, the short-circuit section 33 and the first grounding section 41 jointly contribute the high-frequency resonance frequency band 83 between 4900 and 5875 MHz, and the first parasitic arm 71 contributes the low frequency between 2412 and 2462 MHz. The resonant frequency band 84, so this embodiment can indeed be applied in the wireless area network frequency band.

Refer to Table 2. Table 2 shows that the efficiency (Efficiency) of the total radiation energy (Total Radiation Power) of the antenna 101 in the WLAN application frequency band is greater than -4.5dB at each frequency (unit: MHz), which means greater than 35 %, can meet the job requirements.

Table 2

Referring to FIG. 8 , FIG. 8 is a diagram of measurement data of isolation (Isolation) of the antenna 101 in the WWAN frequency band in this embodiment. Generally, the traditional antenna device that can be applied to different frequency bands is as shown in Figure 2, and the antenna 91 and the antenna 92 are arranged at a distance to maintain the isolation between the two antennas 91 and 92, so that the antenna device can operate in two different frequency bands. The transmitting and receiving effect of the antenna 101 is kept above the standard level. The short-circuit section 33 of the antenna 101 of this embodiment can resonate with the frequency bands of WWAN and WLAN. Therefore, compared with FIG. 2, the antenna 101 is not two antenna bodies separated by a certain distance, but connected The main body of the antenna together, and its isolation is much less than -10dB, so the interference between the two antenna systems is hardly affected.

The radiation pattern (Radiation Pattern) of the antenna 101 is shown in FIGS. 9 to 13 . Fig. 9, Fig. 10 and Fig. 11 respectively show the radiation pattern measurement results in the xy plane, xz plane, yz plane and three-dimensional plane when the antenna 101 works at 880MHz, 1850MHz and 2110MHz in WWAN, while Fig. 12 and Fig. 13 are When the antenna 101 works at 2437MHz and 5470MHz in the WLAN, the measurement results of the radiation pattern in the xy plane, xz plane, yz plane and three-dimensional. The color part of the three-dimensional field diagram represents its gain value (gain, unit: dBi), while for other plane field diagrams, the dark dotted line is the measurement result of the magnetic field (Phi), while the light dotted line is the electric field (Theta) The measurement results of , and the solid line is the total of electric field and magnetic field. It can be seen from the radiation pattern diagrams that the radiation pattern of the antenna 101 is also close to omnidirectional radiation pattern, which can achieve good transceiving performance.

To sum up, the effect of the present invention is to use the short-circuit section 33 of the antenna 101 to effectively apply the left and right parts of the antenna 101 to two different communication standards (WWAN and WLAN), while maintaining good isolation degree (Isolation), so that the left and right will not interfere with each other; in addition, the antenna 101 of the antenna device 10 of the present invention uses the first and second feed-in sections 12, 22 on both sides as signal feed-in, so that the antenna 101 connected The first and second feeders 61, 62 can minimize the occupied space in the notebook computer 8 or any electronic communication device.

The above are only preferred embodiments of the present invention, and should not limit the implementation scope of the present invention, that is, all simple equivalent changes and modifications made according to the content of the present invention should fall within the scope of the present invention.

Claims (11)

1. An antenna, comprising: a grounding part, including a first grounding section and a second grounding section for grounding; A radiating section, including a short-circuit section extending upward from the ground section, and a first radiating section and a second radiating section respectively extending in two opposite directions from an end of the short-circuit section away from the ground section; A first feeding arm, including a first section adjacent to the first radiating section at intervals, and a first feeding section adjacent to the ground part at intervals and available for signal feeding, the first feeding arm is In an inverted L shape, the first section and the first radiating section generally extend along the same straight line, and the first feeding section is from the end of the first section away from the first radiating section to the first grounding section Extending, the first feed-in segment is spaced adjacent to one end of the first ground segment; A second feed arm, including a second segment adjacent to the second radiating segment at intervals, and a second feed segment adjacent to the ground part at intervals and capable of feeding signals, the second feed arm is It is in an inverted L shape, and the second section and the second radiating section generally extend along the same straight line, and the second feeding section is from the end of the second section away from the second radiating section to the second grounding section extending in the direction, the second feed-in section is spaced adjacent to one end of the second ground section; a first parasitic arm, one end of which is connected to the first ground section, and extends along the short-circuit section, the first radiating section and the first feeding arm in parallel; and A second parasitic arm, one end of which is connected to the second ground section, extends along the short-circuit section, the second radiating section and the second feeding arm in parallel. 2. The antenna according to claim 1, wherein the first feeding section of the first feeding arm is farther away from the first radiating section than the first section, and the second feeding section of the second feeding arm The incoming segment is farther from the first radiating segment than the second segment. 3. The antenna according to any one of claims 1 to 2, further comprising a substrate having a surface, and the radiation part, the first feeding arm and the second feeding arm are all on the surface of the substrate Extend up. 4. The antenna according to claim 1, wherein each of the first parasitic arm and the second parasitic arm is inverted L-shaped and located on opposite sides of the short-circuit section. 5. The antenna according to claim 4, further comprising a substrate having a surface, and the radiation portion, the first feeding arm, the second feeding arm, the first parasitic arm and the second parasitic arm all extend on the surface of the substrate. 6. An antenna device comprising: a grounding part, including a first grounding section and a second grounding section for grounding; A radiating section, including a short-circuit section extending upward from the grounding section, a first radiating section and a second radiating section, the section of the first radiating section and the second radiating section away from the grounding section from the short-circuit section respectively extend in two opposite directions; A first feeding arm, including a first section adjacent to the first radiating section at intervals, and a first feeding section adjacent to the ground part at intervals and available for signal feeding, the first feeding arm is In an inverted L shape, the first section and the first radiating section generally extend along the same straight line, and the first feeding section is from the end of the first section away from the first radiating section to the first grounding section extend; A second feeding arm, including a second section adjacent to the second radiating section at intervals, and a second feeding section adjacent to the ground part at intervals and capable of feeding signals, and the second feeding arm It is in an inverted L shape, and the second section and the second radiating section generally extend along the same straight line, and the second feeding section is from the end of the second section away from the second radiating section to the second grounding end direction extension; a first feeder, capable of signal transmission and connected to the first feeder segment, the first feeder segment is spaced adjacent to one end of the first ground segment; a second feeder, capable of signal transmission and connected to the second feed-in segment, the second feed-in segment is spaced adjacent to one end of the second ground segment; a first parasitic arm, one end of which is connected to the first ground section, and extends along the short-circuit section, the first radiating section and the first feeding arm in parallel; and A second parasitic arm, one end of which is connected to the second ground section, extends along the short-circuit section, the second radiating section and the second feeding arm in parallel. 7. The antenna device according to claim 6, wherein the first feeding segment of the first feeding arm is farther away from the first radiation segment than the first segment, and the second feeding segment of the second feeding arm is The feeding section is farther away from the first radiating section than the second section. 8. The antenna device according to claim 7, wherein the first feeder is connected to an end of the first feed section adjacent to the ground portion, and the second feeder is connected to the second feed section adjacent to the ground One end of the connection. 9. The antenna device according to any one of claims 6-8, further comprising a substrate having a surface, and the radiating part, the first feeding arm and the second feeding arm are all located on the substrate of the substrate. extended on the surface. 10 . The antenna device according to claim 6 , wherein each of the first parasitic arm and the second parasitic arm is inverted L-shaped and respectively located on opposite sides of the short-circuit section. 11 . 11. The antenna device according to claim 10, further comprising a substrate having a surface, and the radiation part, the first feeding arm, the second feeding arm, the first parasitic arm and the second parasitic Arms each extend over the surface of the substrate.