TW561647B - Dual-band dual-slot antenna - Google Patents

Abstract

The present invention is related to a dual-band dual-slot antenna. The antenna comprises a slender metal strip, a longer linear slot embedded within the said metal strip for generating the first (lower) frequency operating mode, and a shorter linear slot embedded within the slender metal strip for generating the second (higher) resonant mode. A prototype of the present invention suitable for applications in the wireless local area network (WLAN) in the 2.4 GHz (2.4-2.484 GHz) and 5.2 GHz (5.15-5.35 GHz) bands has been successfully implemented, and the prototype shows good antenna gain for WLAN operations.

Description

^ 61647 V. Description of the invention (1) -------- The wireless communication technology of the k-persons is also developing like a bamboo shoots after the rain, and various communication products and technologies in the human life ^ appear Therefore, wireless communication products have gradually become an action, which is very useful, and notebook computers often need to do data transmission in order to achieve: 'it; it can simplify many of its wiring and setting problems, and the design of wireless antennas is not possible. be lacked. And-the department is certain that the complex sigma L-type c-type computer wants to be widely accepted and key in the market, so: f-view, size and performance will be very important. Institute: even better antenna design . m :: Slot antennas used in notebook computers are single-slot antennas, and are designed for: ·, and early frequency. U.S. Patent No. 6,339,400 "Integrated antenna for la two electric app 1 i ca ti ns", which discloses a method of using a ground plane built into a notebook computer LCD screen to design a slot in the ground plane Examples of antennas and inverted-F antennas, but this antenna is limited to helmet-limited local area network systems in a single band of 2 · 4 GHz, and is not applicable to other wireless band network systems such as 5 · 2 GHz; US Patent No. 6, 373, 443 "Arcuate slot antenna assembly", which discloses a curved slot antenna design, but the same is only for single-frequency operation | Operates at 2 · 4 GHz. In order to solve this problem, in the present invention, we propose "an innovative design of a dual-frequency dual-slot antenna, which not only has the operation function of dual-band (such as 2.4 and 5. 2 GHz bands), but also has a slender antenna The form factor is particularly suitable for communication products such as notebook computers, to achieve the purpose of hiding the antenna, and to maintain the appearance of the product. As described above, the object of the present invention is to provide a dual-frequency dual-slot antenna.

Page 6 561647 V. Description of Invention (2) The innovative design of the line. The long slot of the hair is controlled by the antenna's first (low frequency is cut to the slender gold frequency) operating mode; a wire that feeds the short slot of the single slot; a first ground point edge to connect To a feed with the same ground point, located on the outer layer of the coaxial transmission line. By adjusting the positions of the two and the required frequency ground point, you can easily connect the GHz dual-band antenna to a feed of the same elongated metal. The longer to the shorter one-to-one ratio; the design obtained by the tuning indicates that the antenna is cut in). The operating point is in-chip entry point, interval, even, located in the shaft transmission word ground guide slot. The feed should be good. : The slender mode; for the slot body located outside the longer line. At the length of the input point, the impedance is grounded to the outside of the wireless layer. This item is set to get the first match. In the area of the mesh metal sheet, a zigzag antenna and a zigzag shaft transmit the slotted conductor; the appropriate grounding point in the connection is 2. #; one is used to generate the slotted slot, the second (The high slot and the outer side of the center of the line and-the second to a feed we can resonance frequency and the second characteristic, I 4 / 5.2 refer to Figure 1, the implementation of the dual-frequency dual slot antenna of the present invention Example i includes: an elongated metal sheet 10;-a longer zigzag slot u having an outer edge 1 1 1 and an inner edge 1 1 2 is cut into the elongated metal sheet 10 for Generate the first (low-frequency) operating mode of the antenna; a shorter zigzag slot 12 having an outer edge 1 2 1 and an inner edge 22 is cut into the elongated metal sheet 10, A second (high frequency) operating mode for generating the antenna; a feed point 1 3 is located between the longer one slot 11 and the shorter one slot 12 and is connected to _Feed the central conductor of the coaxial transmission line; a first ground point 14 is located in the longer one

561647 V. Description of the invention (3) " = outside edge of the hole 1 1 1 is connected to the outer ground and body of a feed coaxial transmission line, and a second ground point 15 is located outside the shorter one of the zigzag slot holes Edge 1, connected to an outer ground conductor that feeds the coaxial transmission line. • FIG. 2 is an experimental measurement result of the return loss of the antenna according to an embodiment of the present invention. ^ In this embodiment, the elongated metal sheet has a length of about 0 mm and a width of about 1 mm; the longer The zigzag slot η has a length of about 61 mm and a width of about 2 mm; the shorter zigzag slot 12 has a length of 30 mm and a width of about 2 mm; a feed point ι3, and a first ground point 丨The bucket and the ground contact point 15 are both about 7 mm from the bottom of the slot. In this experimental measurement, in order to simulate the grounded metal surface environment built into the reed delta-type computer LCD screen, we used a steel sticker to electrically connect this embodiment to a length of about 260 mm and a width of about 200 mm. Side of one of the metal faces. From the obtained experimental results, the center frequency of the first (low-frequency) operating mode 21 is located at about 2.45 GHz, and the center frequency of the second (high-frequency) operating mode 22 is located at about 5.25 GHz. The voltage standing wave ratio is less than 2 · Under the definition of 5 (return loss is less than approximately 7.3 dB), the bandwidth of the first and first operating modes is sufficient to cover both 2 4 GHz (2.4-2.484 GHz) and 5 · 2 GHz (5.15-5.35 GHz). Wireless LAN bands. Figure 3 is an experimental measurement result of the antenna gain of the antenna of the present invention in the 2 · 4 GHz band (the first operating mode); from the obtained experimental results, the antenna gain of the first operating mode is about 5 · 8-7 · 1 network commonly used frequency band 2. 4 GHz (2. 4-2. 484 GHz) gain requirements. Figure 4 is an embodiment of the antenna of the present invention in the 5. 2 GHz band (second operating mode) antenna gain experimental measurement results; from the obtained experimental results, the antenna gain of the second operating mode is about 4. 8- 6 · 8 dB i, also applicable to

561647 Five-line requirements, description of the invention (4) Gain requirements for the frequency band 5 · 2 GHz (5 · 15-5 · 35 GHz) commonly used in local area networks. Figure 5 is a structural diagram of another embodiment of the antenna of the present invention. This embodiment includes: an elongated metal sheet 50; a longer one-shaped slot 51 having an outer edge 5 11 and an inner edge 5 1 2 is cut into the elongated metal sheet 50 for generating The first (low-frequency) operating mode of the antenna; a shorter zigzag slot 5 2 is cut into the elongated metal sheet 50 and has an outer edge 5 2 1 and an inner edge 5 2 2. ^ 1: high frequency) operation mode for generating the antenna; a mine entry point 53 is located between the I-shaped & hole 51 and the short one-shaped slot 52 and is connected to a The center conductor of the feed coaxial ^ transmission line; a first grounding point 54 located at the outer edge of the longer _ slot 5 1 1 is connected to the outside of the feed coaxial transmission line / conductor; and a second The ground point 5 5 is located at the short edge of the ^, and is connected to the short outer layer of the coaxial transmission line that is fed in-so as not to be at the-ground point-the "" connection: Figure 6 is also the antenna of the present invention The structural examples of other embodiments include: an elongated metal sheet 60; a longer one is envious of the application-outside edge 6 " and an inside edge 612, is cut "II: In the metal sheet 60, it is used to generate the _ (low frequency) operating mode of the antenna f. The width of the slot may not be a certain value; a shorter one is traced and has an outside edge. With an inner edge 622 = and the width of the slot may not be a certain value, the state 'text point b 3' is located in the comparison

561647

The long slot 61 and the shorter one-shaped slot are fed into the outer ground conductor of the coaxial transmission line; the first one is reversely connected to the outer edge of the longer sigmoid slot 6 6, which is even a dream. 6 A center wire of the transmission line; and a second feed point 6 to a feed coaxial Baoyou feed point b5, located at the shorter one Ί ΐ connected to the center line of a feed coaxial transmission line. The position of the ground point 63 may be on the line connecting the first feeding point 64 and the k feeding point 65. Figure 7 is a structural diagram of another embodiment of the antenna of the present invention. This embodiment includes: an elongated metal sheet 70; a longer one-shaped slot hole 具, which has two outer edges 711 and an inner edge 712, is cut into the elongated gold sheet 70 for generating The first (low-frequency) operating mode of the antenna; a short child-shaped slot 7 2 having an outer edge γ 2 1 and an inner edge $ 'is cut into the elongated metal sheet 70 for generating the Antenna 12 (high frequency) operation mode; a feed point 73 is located between the longer one slot 712 and the shorter one slot 72, connected to a feed j 1 is the center wire of the transmission line; an arched metal wire 7 5 crosses the longer one; ^ slot 7 1 and the shorter one of the zigzag slot 7 2, the two ends of which are respectively located at = 乂And the outer edges 7 丨 丨, 7 2 丨 of the shorter one of the glyph slots; and a site 74, which is located at about the center point of the arched metal wire 75, and is connected to the ground conductor on the outer layer of the coaxial transmission line. The embodiments described in the above description are only for explaining the principle of the present invention and its 1 ^ ', but not for limiting the present invention. Therefore, those skilled in the art can modify and change the above embodiments without departing from the spirit of the present invention. The scope of the rights of the present invention shall be as listed in the patent application scope mentioned later.

561647 Brief description of the drawings [Simplified description of the drawings] FIG. 1 is a structural diagram of an embodiment of an antenna of the present invention. FIG. 2 is an experimental measurement result of return loss of an embodiment of the antenna of the present invention. FIG. 3 is an antenna gain measurement result of an embodiment of the antenna of the present invention at 2.4 GHz (first operation mode).

FIG. 4 is an antenna gain measurement result of an embodiment of the antenna of the present invention at 5.2 GHz (second operation mode). FIG. 5 is a structural diagram of another embodiment of the antenna of the present invention. FIG. 6 is a structural diagram of another embodiment of the antenna of the present invention. FIG. 7 is a structural diagram of another embodiment of the antenna of the present invention. [Explanation of component symbols (1)] 1: An embodiment of the dual-frequency dual-slot antenna of the present invention

I 0: elongated metal sheet II: longer zigzag slot I 11: longer zigzag slot outside edge II 2: longer zigzag slot inside edge 1 2: shorter zigzag slot

P.11 561647 Brief description of the drawing [Description of component symbols (2)] 1 2 1: Outer edge of shorter zigzag slot 1 2 2: Inner edge of shorter zigzag slot 1 3: Feed point 1 4 : First ground point 1 5: Second ground point 2 1: First operation mode 2 2: Second operation mode 5: Other dual-frequency dual slot antenna of the present invention 5 0: Slim metal sheet 5 1: longer zigzag slot 5 11: longer zigzag slot outside edge 5 1 2: longer zigzag slot inside edge 5 2: shorter zigzag slot 5 2 1: shorter Outside edge of zigzag slot 5 2 2: shorter inside edge of zigzag slot 5 3: feed point 5 4: first ground point 5 5: second ground point

Page 561647 Brief description of the drawings [Description of component symbols (3)] 6: Other embodiments of the dual-frequency dual-slot antenna of the present invention 6 0: Slim metal piece 6 1: Longer zigzag slot 6 1 1 ············································································································· Â · Â · Â · Â ········································ in-in-a-square hole; : Shorter zigzag slot inside edge 63: Ground point 64: First feed point 65: No.—feed point

7: Other embodiment of the dual-frequency dual-slot antenna of the present invention 7 0: Slim metal sheet 7 1: Longer zigzag slot 7 1 1: Longer zigzag slot outer edge 7 1 2: Longer Inside edge of zigzag slot 7 2: shorter zigzag slot

7 2 1: Outside edge of shorter zigzag slot 7 2 2: Inside edge of shorter zigzag slot 73: Feed point 74: Ground point 7 5

Page 13

Claims (1)

561647 6. Scope of patent application 1. A dual-frequency dual-slot antenna, comprising: an elongated metal piece; a longer one-shaped slot is cut into the elongated metal piece, and is used for generating the first antenna A (low frequency) operating mode; a shorter zigzag slot is cut into the elongated metal sheet to generate a second (high frequency) operating mode of the antenna; a feed point is located at the The longer slot and the shorter slot are connected to a central wire feeding a coaxial transmission line; a first ground point is located at the outer edge of the longer slot and is connected to A grounded conductor on the outer layer of the coaxial transmission line is fed; and a second ground point is located on the outer edge of the shorter one-shaped slot and is connected to a grounded conductor on the outer layer of the coaxial transmission line. 2. For the slot antenna of item 1 of the patent application, wherein the longer single slot is substantially parallel to the shorter single slot. 3. For the slot antenna of item 1 of the patent application scope, the position of the feed point may be on the line connecting the first ground point with the second ground point. 4. For the slot antenna of item 1 of the patent application scope, the position of the feed point may not be on the line connecting the first ground point with the second ground point. 5. If the slot antenna of item 1 of the patent application, the longer one Page 14 561647 6. Scope of patent application The shape of the slot hole may not be a certain value. 6. For the slot antenna of item 1 of the patent application scope, the shorter one of the glyph slots may not have a certain width. 7. A dual-frequency dual-slot antenna, comprising: an elongated metal piece; a longer one-shaped slot is cut into the elongated metal piece for generating the first (low-frequency) operation of the antenna Modal; a shorter zigzag slot is cut into the elongated metal sheet to generate the second (high-frequency) operating mode of the antenna; a ground point is located in the longer zigzag slot The hole and the shorter one of the glyph slots are connected to a ground conductor outside the feed coaxial transmission line; a first feed point is located at the outer edge of the longer one of the glyph slots and is connected to a feed coaxial A center wire of the transmission line; and a second feeding point located at the outer edge of the shorter one of the zigzag slots and connected to a center wire of the coaxial transmission line. 8. The slot antenna according to item 7 of the patent application, wherein the longer single slot is substantially parallel to the shorter single slot. 9. The slot antenna according to item 7 of the patent application, wherein the position of the ground point may be on the line connecting the first feeding point and the second feeding point. Page 15 561647 6. Scope of patent application 10. For the slot antenna of item 7 of the scope of patent application, the position of the ground point may not be on the line connecting the first feeding point and the second feeding point. 11. The slot antenna according to item 7 of the patent application, wherein the width of the longer one of the slot-shaped antennas may not be constant. 1 2. The slot antenna of item 7 in the scope of patent application, wherein the width of the shorter one of the zigzag slot may not be constant. 1 3. A dual-frequency dual-slot antenna, comprising: an elongated metal sheet; a longer one-shaped slot is cut into the elongated metal sheet to generate the first (low frequency) of the antenna Operating mode; a short zigzag slot is cut into the elongated metal sheet to generate the second (high-frequency) operating mode of the antenna; an arched metal wire spans the longer A glyph slot and the shorter glyph slot, and both ends of the glyph slot and the shorter glyph slot are located at the outer edges of the longer and the glyph; A ground point located approximately at the center point of the arched metal wire and connected to a ground conductor outside the feed coaxial transmission line; and a feed point located at the longer one of the glyph slot and the shorter one of the glyph Between the slots, connected to a central conductor that feeds into the coaxial transmission line Page 16 561647 6. Scope of patent application 1 4. The slot antenna according to item 13 of the patent application scope, wherein the longer one of the slotted holes is substantially parallel to the shorter one of the slotted holes. 15. The slot antenna according to item 13 of the patent application scope, wherein the arched metal wire can be directly above the feeding point. Line sky hole slot. On the side of the 3 1st point, the first point of the Fan Fanli benefits should be applied in the application. • May 6 1 line gold arches in the line. One of the values of the slot value is 3 1 is not the range of the range can be widened, please be special, m L _ 孑 as a slot • the shape of the 7 1 word is longer than the line. One of the values of the slot value is 3 1 not to be ranged to a wide range and to be wide. Please m ’L 孑 孑 as a groove