TWI232613B - Planar dual L-type double-frequency antenna - Google Patents

Abstract

A kind of planar dual L-type double-frequency antenna is disclosed in the present invention. The antenna is manufactured through the following steps. On one side face of the dielectric substrate, a coplanar waveguiding wire or a microstrip is printed, and one of its ends is used as the signal-feeding terminal. On the same side face or the other side face of the dielectric substrate, a grounding metal face corresponding to the position of the coplanar waveguiding wire or the microstrip is printed such that a constant separation distance is maintained between the grounding metal face and the coplanar waveguiding wire or the microstrip. The other end of the coplanar waveguiding wire or the microstrip is extended toward the position excluding the grounding metal face, so as to extend from its longitudinal axial side to form one radiation body having a reversed L shape. The grounding metal face extends from the position near the radiation body having a reversed L shape toward the position excluding the grounding metal face to form the other radiation body having a reversed L shape. Both radiation bodies are extended along the corresponding direction or parallel direction; and a constant separation distance is maintained between them with the length approximately equal to one quarter wavelength of each frequency band of the double-frequency section such that each radiation body can respectively generate different frequency band signals.

Description

1232613 V. Description of the invention (1) The technical field to which the invention belongs: The invention is an L-shaped queen, + m ^ The main eight deep, especially a kind of printing substrate which can be used on a dielectric substrate to produce 4 Germany is hungry, and the technology is in line. Flat-type dual L-shaped antenna with dual-band MIMO technology: According to the L-shaped antenna used in traditional communication devices, please refer to the second, including two identical, electrical line 10, 1 coaxial coaxial thin line 10 includes one 3 said to be separated by "outer conductor i 6 (also referred to as ground shield conductor T6 separated by an insulating dielectric material I?), The inner conductor 14 and the outer conductor 16 of two K are formed-electromagnetically: The outer edge of the coaxial electrical line 10 at the end Lb is covered with -insulating outer 1, ', and connected to the control circuit of a wireless communication device (Figure ti: "using the coaxial cable 10 as a feed line, Otherwise-the outer conductor 16 is connected =: =, the metal ground plane 18 is connected to the outer conductor 16 of the coaxial cable 10, and is extended to the metal ground plane 18, An inverted L-shaped round projectile is formed. The letter 丨 丨 # _ and the right is certain> The length of the L projectile is related to the resonance frequency of the antenna ^, and this type of antenna is generally a single-frequency design. ,, In order to make this type 1 ^ antenna thinner and lighter, some people will already make AV printed circuit boards. Refer to Figure 2 ^ =-there is a printed on the side With two electric shells / plates 27, the dielectric substrate 27 is from τ line 24, and one end of the microstrip line 24 is used as 1232613. V. Description of the invention (2) is the signal feeding end 2 4 1. The dielectric A position on the other side of the substrate 27 corresponding to the microstrip line 24 is printed with a ground metal surface 28, and the other end of the microstrip line 24 is directed to a position other than the ground metal surface 28. An inverted L-shaped radiator 242 is extended. The length of the inverted L-shaped radiator 242 has a certain proportional relationship with the resonance frequency of the antenna. Generally, the antenna is also designed for early frequency.

In addition, another manufacturer uses a coplanar waveguide (Cop 1 anar Wave Guide) as a feed line to make this l-type antenna on a printed circuit board. Refer to FIG. 3, this coplanar waveguide The l-type antenna includes an " electrical substrate 37, and the dielectric substrate 37 is printed on the side with a coplanar waveguide 34, and one end of the coplanar waveguide 34 is used as a signal feeding end 34m. On the same surface of the coplanar waveguide line 34, corresponding to the peripheral position of the coplanar waveguide line 34, a ground metal surface 38 is printed, and the ground metal surface 38 is kept constant with the coplanar waveguide line 34 Space, the other end of the coplanar waveguide line 34 extends beyond the ground metal surface 38 to form an inverted L-shaped radiator 342. The length of the inverted L-shaped radiator 342 and the resonance frequency of the antenna are constant. Proportional relationship, and the antenna is also designed for single frequency.

In recent years, as the market demand for mobile communication products has increased significantly, the development of Yiyi has become more rapid. Among the many wireless communication standards, the most attractive 802 1 1 ZO Ξ 5 Sub-Electrical Engineers Association (hereinafter referred to as 1ΕΕΕ) ^ ΜΕΕΕ 802 ^ ΐΓΓ? ί ^ L〇Cal NetWOrk) ^ 提 # ^ The system was established in 1997. The agreement not only cultivates wireless products that do not drink; it also provides solutions that enable each other to communicate with each other. , The agreement

1232613 V. Description of the invention (3) The system of undoubtedly opened a new milestone for the development of wireless communication. However, in August 2000, 1 £ ^ made the 8021 agreement become the American Institute of Electrical and Electronics Engineers (IEEE) / American National Standards Institute (ANSI) and the International Standards Organization (I SO) / International Electronic Technology The association (& [EC) among the associations & quasi 'has made further amendments to it, adding two important contents to the amendment, namely the IEEE 8 02. Ua agreement and IEEE 80.2. Nt ) Xie Xuan 'according to the provisions of the two agreements, in the extended standard physical layer, its operating frequency band must be set at 5 billion Hertz (5GHz) and 2.4 billion Hertz (2.4 GHz). Therefore, when a wireless communication product When using these two wireless communication protocols at the same time, the aforementioned traditional L-shaped antenna cannot meet this requirement, and multiple antennas must be installed according to the requirements on the frequency band. However, this not only increases the cost of parts and installation procedures Moreover, it is necessary to free up a lot of space on the wireless communication product to install the L-shaped antennas, so that the volume of the wireless communication product cannot always be easily reduced to meet the thin, light and short design trend. Summary of the Invention: In view of the foregoing traditional L-shaped antennas, all of them are single-frequency antennas and cannot meet the [in the frequency band requirements. # 明人 is based on years of technical experience in antenna manufacturing and accumulated expertise, targeting L-shaped antennas. The characteristics of the antenna were studied in various solutions, and after continuous research, testing and research, finally developed and designed the planar dual L-type dual-frequency antenna of the present invention. An object of the present invention is to print a J: J tape 'line' on one side of a dielectric substrate. The micro-strip line-end is used as a signal feed-in terminal, and On the other side, corresponding to the position of the microstrip line,

Page 7 1232613

A grounded metal surface is printed. The other end of the microstrip line extends to a position other than the metal surface and extends from its longitudinal axis. A :: = = light shot H, and the grounded metal surface is adjacent to the grounded metal surface. At the position of the starved body, another field-shaped radiator extends to a position other than the grounded metal surface. The two radiation systems maintain a certain distance from each other, and extend in the direction or in the same direction, each of the radiators. Can be used to receive signals from different frequency bands. Another object of the present invention is on one side of a dielectric substrate. Two or two coplanar waveguide lines are used as a signal and on the same side of the dielectric substrate. In the above, a ground metal self is printed corresponding to the peripheral position of the coplanar f-conductor. The ground metal plane system / the coplanar waveguide line is kept at a certain distance, and the other end of the coplanar waveguide line is toward the ground metal plane. It extends outside and extends from its longitudinal axis to one side, the inverted L-shaped radiator, and the ground metal surface extends from a position adjacent to the inverted L-shaped radiator to a position other than the ground metal surface. Another radiator with an inverted L-shape, the two radiation systems maintain a certain distance from each other, and extend in parallel in the 2 direction or the same direction. Each of the radiators can be used to receive signals in different frequency bands. Another object of the present invention is that the length of the two radiators is equal to about one-fourth of the wavelength of each frequency band in the two dual frequency bands—the length, and each of the Korean radiators can be used to receive the IEEE 80 2.1 1 a protocol and IEEE 8 〇 21ib agreement of the dual-band signal. In order that the review committee can further understand and understand the shape, structure, design king of the present invention and its effects, a few implementations are enumerated.

Page 8 1232613 V. Description of the Invention (5)-Example 'and the illustrations, the detailed description is as follows: Implementation: In a preferred embodiment of the present invention, please refer to FIG. A microstrip line is printed on the side of the dielectric substrate 47, and one end of the microstrip line 44 is used as a signal feeding terminal 441, and on the other side of the dielectric substrate 47, corresponding to the The position of the microstrip line 44 is printed with a ground metal surface 48. The other end of the microstrip line 44 extends to a position corresponding to the ground metal surface 48 and extends from the longitudinal axis to the side. The inverted L-shaped radiator 442, and the ground metal surface 48 extends another inverted L-shaped radiator 481 from a position adjacent to the inverted [shaped radiator 442 to a position other than the grounded metal surface 48. The two inverted radiators 442, 48 1 are kept at a certain distance from each other and extend in corresponding directions. Each of the radiators 442, 481 can be used to receive signals of different frequency bands, respectively. In the preferred embodiment, since each of the radiators 442 and 481 is used to receive signals of different frequency bands, the length of each of the radiators 442 and 481 should be respectively different from the different resonance frequencies intended by the antenna. A certain proportional relationship. In the preferred embodiment of the present invention, the length of each of the radiators 442, 4 81 is preferably approximately equal to a quarter of the wavelength of each of the frequency bands in the dual frequency band to be designed, wherein each of the radiators The medium and longer radiator 442 is used as a low-frequency radiator, and the shorter radiator 481 is used as a high-frequency radiator. Each of the radiators 442 and 481 of different lengths can be used to receive the IEEE 80 2.1 1 a protocol and the IEEE, respectively. The dual-band signal specified in the 8012b agreement.

Page 1232613 V. Description of the invention (6) In another preferred embodiment of the present invention, please refer to FIG. 5, a coplanar wave is printed on one side of a dielectric substrate 57 The lead wire 54, 俾 uses one end of the coplanar waveguide line 54 as the signal feed-in end 541, and on the same side of the dielectric substrate 57, corresponds to the peripheral position of the coplanar waveguide line 54, A ground metal surface 5 8 is printed, and the ground metal surface 5 8 is kept at a certain distance from the coplanar waveguide line 5 4, and the other end of the coplanar waveguide line 5 4 is positioned outside the ground metal surface 5 8 Extending, and an inverted L-shaped radiator 5 4 2 is extended from one side of the longitudinal axis, and the ground metal surface 58 is directed toward the ground metal surface from a position adjacent to the inverted L-shaped radiator 542 An inverted L-shaped radiator 581 extends from a position other than 58. The two inverted-L radiators 542 and 581 are kept at a certain distance from each other and extend in parallel in the same direction. Each of the radiators 5 4 2 , 5 8 1 can be used to receive signals in different frequency bands. . In addition, according to the antenna structure shown in FIG. 5, the present invention prints the coplanar waveguide 54, the two radiators 542 and 581 and the ground metal surface 58 to a thickness of 0.8 mm and a dielectric. The flat-shaped dielectric substrate 57 with a coefficient of about 4 · 3 ~ 4 · 7 is used to 'actually produce the planar dual-type dual-type antenna according to the present invention', in which the coplanar waveguide 54 and the two The width of the inverted L-shaped radiator 5 ancient 42/58 1 is about 1 millimeter (mm), the length of the low-frequency radiator 542 is about 23, and the length of the high-frequency radiator 581 is about 12 mm (mm). 23 · 588 1 ~ 32. 524 1 billion Hertz (2.3 5 88 1 ~ 3. 2524 1 GHz) and 49.7438 ~ 55. 0920 billion Hertz (4. 97438 ~ 5.50920 GHz) frequency bands—κ to measure its return loss (Return l 0ss), the measurement results are shown in Figure 9 'both frequency bands are better than 9 decibels (dB). So by this

1232613 V. Description of the invention (7)

The equivalent measurement results show that the planar dual L-type dual-frequency antenna designed by the present invention can be used to receive the IEEE 8 0 2. 1 1 a protocol and the IEEE 8 0 2 · 1 1 b protocol, respectively. Dual-band signal. In this another preferred embodiment, since each of the radiators 5 4 2, 5 8 1 is used to receive signals of different frequency bands respectively, the length of each of the radiators 5 4 2, 5 8 1 should be separately from There is a certain proportional relationship between the different resonance frequencies that the antenna is intended to design. In another preferred embodiment of the present invention, the length of each of the radiators 5 4 2 and 5 8 1 is preferably approximately equal to a quarter of the wavelength of each frequency band in the desired dual frequency band. Among them, the longer radiator 5 4 2 is used as a low-frequency radiator, and the shorter radiator 5 8 1 is used as a south-frequency wheel radiator. Each of the radiators 5 4 2, 5 8 1 Can be used to receive dual-band signals specified by the IEEE 802.11a protocol and the iee 802 · lib protocol, respectively. -In the preferred embodiment, please refer to Figures 4 and 5 again :: The coplanar waveguide 54 of Ming Dynasty is a long strip that extends in a straight line. At the time of this month's construction, < Paper ♦ It is designed to be bent and extended to match κ teeth, hidden features or characteristics, as shown in the figure. In addition, in the present invention, when the two common waveguides 64, such as No. 6 481, are actually implemented, it can be reported that the two radiators 442 need to be paralleled to extend in the same direction. or? Health matching 'is shown. As for the present invention, in the second field projectile 74 2, 781 'as shown in Figure 7 581, when the actual implementation, == the two radiators 542, counted to maintain a certain interval between each other, Π, or The characteristics match, and set 842, 881, as shown in Figure 8. Radiators extending in corresponding directions

1232613 V. Description of the invention (8) --- According to the antenna structure shown in Figure 6, the present invention prints the coplanar waveguide 64, the two radiators 642, 681, and the ground metal surface 68 to a thick production line as 〇 · 8 millimeters (mm) and the dielectric constant is about one of 4 · 3 ~ 4 · 7 ^ plate-shaped dielectric $ = on the substrate 67, the planar dual-type dual-frequency antenna according to the present invention is actually manufactured . In addition, according to the antenna structure shown in FIG. 4, the present invention prints the microstrip line 44, the two radiators 442, 481, and the ground metal surface 48 to a thickness of about 0.8 millimeters (mm) and a dielectric constant. About one of the flat dielectric substrates 47 of 4 · 3 ~ 4 · 7, a planar dual-type dual-frequency antenna according to the present invention is manufactured, in which the microstrip line 44 and the two are inverted L-shaped radiations. The width of the body 442, 481 is about 1 meter (mm), the length of the low-frequency radiator 442 is about 25 millimeters (mm), and the length of the high-frequency radiator 481 is about 14 millimeters (mm), which enables the antenna to operate from 2.4 to 2.5 billion Hertz (2.4 to 2.5 GHz) and 52.5 to 5.85 billion Hertz (5.25 to 5.85 GHz) A frequency # is used to continuously measure its return loss (return10 ss). The measurement results are as shown in Figure 1 It shows that both frequency bands are better than 10 decibels (dB). Therefore, the speculative results show that the 'planar dual L-type dual-frequency antenna designed by the present invention' can indeed be used to receive the IEEE 8 02. 1 1 a protocol and the IEEE 80 2.1 and lb protocol respectively. Required dual-band signal. The above description is only a preferred embodiment of the present invention, but the scope of profit claimed by the present invention is not limited to this. According to the technical content disclosed by the person skilled in the art according to the present invention, The equivalent variant sentence that is easily considered should belong to the protection scope of the present invention.

1232613 on page 12 Brief description of the drawings: Figure 1 is a schematic diagram of a traditional L-shaped antenna; Figure 2 is a schematic diagram of a traditional microstrip L-shaped antenna; Figure 3 is a traditional coplanar waveguide L-type antenna Schematic diagram; Figure 4 is a schematic diagram of a preferred embodiment of the present invention; Figure 5 is a schematic diagram of another preferred embodiment of the present invention; Figure 6 is a coplanar waveguide line provided according to Figures 4 and 5 A schematic diagram of a preferred embodiment;

FIG. 7 is a schematic diagram of one of the preferred embodiments of the two radiators provided according to FIG. 4; FIG. 8 is a schematic diagram of one of the most preferred embodiments of the two radiators provided according to FIG. Figure 5 shows the actual measurement results according to the antenna provided in Figure 5. Figure 10 shows the actual measurement results according to the antenna provided in Figure 4. Description of main drawing numbers: Dielectric substrates 47, 57, 67

Microstrip lines ... 44 Coplanar waveguide lines ... 54, 64 Signal feed terminals " 441, 541 radiators ......... 442, 481, 542, 581, 642, 681, 742 ^ 781 ^ 842 > 881 Ground metal surface " 48, 58, 68

Page 13

Claims (1)

1232613 1. A flat dual L-type dielectric substrate; dual-frequency antennas include: Microstrip line, which is printed on the dielectric mine ', and one end is used as a signal mine input terminal. A ground metal surface on one side of the substrate corresponds to the other side of the microstrip line; a gas stands on the dielectric substrate radiator and extends to a position other than the ground metal surface, " 彳 = an inverted L-shaped radiator extending from the other end of the I line, and -w its longitudinal axial side of the metal surface adjacent to the m㈣ projectile u ^ body 2 from outside the ground plane Extending the position of another antenna that is connected to the two gold furnaces, as described in the first patent application scope of the translation of the antenna 'wherein the length of each of these radiators is approximately equal to one quarter of the wavelength of each frequency band in the dual frequency band degree. 3. The antenna according to item 1 of the scope of patent application, wherein the microstrip line can be a long strip that is bent and extended.乂 4. The antenna according to item 1 of the scope of patent application, wherein the two radiation systems maintain a certain distance from each other and extend in the corresponding direction. ^ 5. The antenna according to item 1 of the scope of patent application, wherein the two radiation systems are kept at a certain distance from each other and extend in parallel in the same direction. 6. A planar dual L-type dual-frequency antenna, including a dielectric substrate; 1232613 6. Patent application scope: a coplanar waveguide line printed on one side of the dielectric substrate One end is used as a signal feed-in end; a ground metal surface is printed on the dielectric substrate at a peripheral position on the same side of the coplanar waveguide line as the coplanar waveguide line Maintain a certain interval; two light emitters, one of which is a radiation system extending from the other end of the coplanar waveguide line to a position other than the ground metal surface, and one of which extends from one side of its longitudinal axis to an inverted L shape A radiator, another radiation system extending from the position of the ground metal surface adjacent to the inverted L-shaped radiator to a position other than the ground metal surface, another inverted L-shaped radiator, the two radiation systems Keep a certain interval from each other to receive signals from different frequency bands. The antenna according to item 6 of the patent application, wherein each of the radiation products. In addition, 々 and 々 are respectively equal to a quarter of the wavelength of each band in the dual band. The long wire 8 may be an antenna as described in item 6 of the patent scope, wherein the coplanar wave 9 is extended as described above. Long. The systems maintain the antennas described in item 6 of the exclusive range of each other, wherein the two radiations i 0 are spaced apart from each other and extend in corresponding directions. The radiation system guarantees each other = the antenna described in item 6 of the patent scope, wherein the two spokes ′ and the temple are spaced apart and extend in parallel in the same direction.