TWI275202B - An ultra-wideband monopole antenna for mobile phone - Google Patents

Abstract

The present invention is related to an ultra-wideband monopole antenna for mobile phone application. The antenna comprises three major elements: a first (system) ground plane, a second (antenna) ground plane, and a radiating element. The said first ground plane is of a substantially rectangular shape. The said second ground plane is in perpendicular and connected to the said first ground plane. The said radiating element consists of a first radiating element (a conducting cone) and a second radiating element (a hollow conducting cylinder). The tip of the first radiating element is the antenna feeding point. The present invention can provide an ultra-wide operating bandwidth to easily cover the UMTS band (1920 to 2170 MHz) and the 2.4/5.2/5.8 GHz WLAN bands for mobile/WLAN dual-mode operation or the UMTS and the UWB (ultra-wideband, 3.1 to 10.6 GHz) bands for mobile/UWB dual-mode operation.

Description

1275202

V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) A monopole antenna according to the technical field of the invention, in particular, the present invention relates to a monopole antenna suitable for a mobile phone having an ultra-wideband operation capability. [Prior Art] With the increasing popularity of mobile phones, 烈μ, in the case of fierceness, • In order to meet the market competition: the transmission of the Bellow must be transmitted through the electromagnetic wave to complete the performance of the antenna. One of the important keys to good or bad. / Currently, most of the used mobile phone antennas are designed using a monopole antenna, but in order to achieve the purpose of antenna reduction, the antenna designer usually deforms the monopole antenna, such as a spiral deformation. The design of the related conventional antenna is as follows: US Patent No. 6 0 5 4 6 6 "Antenna Operating in Two Frequency Ranges" 1 and US Patent No. 673483 1 B2 n Double Resonance Antenna (Dual-Resonance) Antenna) 11 and US Patent No. 6 71 〇7 5 2 B 2 n-helical antenna (H e 1 ica 1 A nte η na) ff, both reveal a monopole antenna design suitable for exposed mobile phones. We can find This kind of antenna design is a spiral deformation of the antenna for the purpose of achieving reduction and multi-frequency operation. The design of the pitch in the spiral becomes a very important and sensitive parameter. The impedance bandwidth is usually small and also causes the allowable error in design to be small, that is, it must be quite accurate in production to maintain mass production days. It is good

1275202 V. The invention rate (2) ^ rate. In order to solve this problem, in the present invention, we propose an innovative design of an ultra-wideband monopole antenna. The antenna of the present invention can be realized by a simple metal surface, thereby providing a large bandwidth performance while maintaining the miniaturization of the antenna. Moreover, it has a large allowable error, and an embodiment of the antenna of the present invention can easily cover the third generation mobile communication (丨92〇~21 7〇Μ), wireless local area network (24 00 ~ 2484 /5 1 50 ~ 5 350 /5 725 ~ 5875 MHz) and UWB (Ultra_wideband, 31 ~ 1 〇 6 gHz) required for each frequency band 'is suitable for dual-network mobile phone applications.

SUMMARY OF THE INVENTION As described above, an object of the present invention is to provide an innovative design of an ultra-wideband monopole antenna, which can be achieved by a simple metal surface, which not only provides a reduction in the antenna but also a wide frequency performance. At the same time, it also has a large allowable error, and can easily maintain good yield when manufacturing mass production antennas. The antenna of the present invention mainly comprises: a first (system) ground plane, a second (antenna) ground plane and a radiating element. The first (system) ground plane is substantially rectangular in shape, and has a substantially rectangular cutout at a corner of the rectangle, the notch having a first edge and a second substantially perpendicular to the first edge edge. The second (antenna) ground plane, and the second

The grounding surface is substantially perpendicular and has a substantially rectangular shape, wherein the rectangular edge is electrically connected to the first edge of the notch of the first grounding surface, and the grounding surface has a uniform hole. The radiating element mainly comprises: a sub-radiation element substantially perpendicular to the second ground plane, the shape of the substantially meso-conical shape having an apex and an opening to the vertex, the top two π points toward

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1275202 V. Description of the invention (3) to the second ground plane, and located at f Ek 1 β ^ and located at the through hole of the read second ground plane, the ground, ^ ί ί feed point; The second sub-radiation element is perpendicular to the second one and has a substantially hollow cylindrical shape, and has an upper opening, a vehicle compartment t, and a lower opening of the upper opening, the lower opening edge being electrically connected to the first sub- The edge of the opening of the light projecting element. In this design invention, since the first sub-radiation element of the antenna adopts a two-object guest, one of the cones is a hollow metal tile 1 Xia Zheng: the factory ... 梃 provides two of this - let - antenna A smooth interval with a more uniform surface current density distribution, up to V> Α/λ i_JU / -----------m-,, w heart w, phase τ - two - better - The homogeneity of the color radiating element and the length of the second sub-radiating element improve the effect of matching the impedance of the antenna, so that the design can easily have a broadband characteristic, if we are under the definition of 1 〇 dB return loss , its impedance bandwidth up to 87 70 MHz 'can easily cover third generation mobile communication (192 〇 ~ 2170 MHz), wireless area network (24 0 0 ~ 2484/5 1 50 ~ 5 35 0 / 5 725 ~ 5875 MHz) and UWB (ultra-wideband, 3. Bu 10.6 GHz) required for each frequency band. [Embodiment] FIG. 1 is a first embodiment of an antenna according to the present invention, comprising: a first (system) ground plane 11, a second (antenna) ground plane 丨2, and a radiating element 丨3. The first (system) ground plane 11 has a substantially rectangular shape and has a substantially rectangular cutout m at a corner of the rectangle. The cutout 具有1 has a first edge 112 and a substantially perpendicular The second edge 11 of the first edge 112. The second (antenna) ground plane 1 2 is substantially parallel to the first ground plane 1 1

Page 11 1 252 502 V. Inventive Description (4) Vertically, the shape is substantially a rectangle, wherein one side edge 丨 2 2 of the rectangle is electrically connected to the first edge 112 of the notch 111 of the first ground plane 11 , The second ground plane 12 has a uniform hole 121. The radiating element 13 mainly includes a first sub-radiation element 丨31, substantially perpendicular to the second ground plane 12, and has a substantially hollow shape, having a vertex 1 3 3 and a side of the vertex Forming an opening 1 3 2 , the vertex 1 3 3 faces the second ground plane 1 2 , and is located at the through hole 1 2 1 on the second ground plane 1 2 , the vertex 1 3 3 is the feeding of the antenna a second sub-lighting element 134 is substantially perpendicular to the second ground plane 1 2 and has a substantially hollow cylindrical shape with an upper circular opening 135 and a circular opening relative to the upper circular opening A circular opening 丨3 6 below the 丨3 5 is electrically connected to the edge of the circular opening 133 of the first sub-radiation element 1 3 1 . Figure 2 is a graph showing the return loss experimental measurement of the antenna of the first embodiment of the present invention. 'We chose the first (system) ground plane 11 to have a length of about 1 2 〇 mm and a width of about 60 mm. A corner of the ground 11 has a substantially rectangular cutout 丨丨1 having a length of about 10 mm and a width of about 25 mm. The second (antenna) ground plane 12 is selected to have a length of about 1 mm and a width of about 20 mm, the through hole 1 2 1 is about 5 mm from the side of the second ground plane 1 2 1 2 2; the height of the first sub-radiation element 丨 3 1 is selected to be approximately 丨〇匪, facing the vertex The circular opening 1 3 2 has a radius of about 5 mm, and the second sub-radiation element 1 3 4 has a length of about 10 mm and a radius of about 5 mm; from the experimental results obtained, the antenna is defined under the definition of 10 dB return loss. Operating mode impedance bandwidth up to 877 0 MHz 'It can easily cover 3rd generation mobile communication (192〇~217〇mHz), wireless area network (2400 ～248 4/5 1 50 ～5 350/5725 〜 587 5 MHz)

Page 12 1275202 V. INSTRUCTIONS (5) and UWB (ultra-wideband, 3 1~id β requirements. · 6 GHz) required frequency bands Figure 3 is a field-type measurement result of the antenna of the present invention. Fig. 4 is a measurement result of the radiation field type of the radiation MHz of the invention 1 at > 4 5 MHz. The first embodiment and the first embodiment operate on the second embodiment of the present invention. The antenna is an embodiment of the present invention. The operation of the antenna of the present invention is implemented as two = 5 2 ' dBd real results, / in the frequency band. The antenna gain is approximately equal to the gain requirement of the general third-generation operational benefit/UWB operation. The line Q domain network and the ninth figure are another embodiment 2 of the antenna of the present invention, comprising: a first (ground) ground plane 21, a second (antenna) ground plane 22, and a radiating element" 23. The first (system) ground plane 21 is substantially rectangular in shape. The second (antenna) ground plane 22 is substantially perpendicular to the first ground plane 21, and has a substantially rectangular shape, wherein the rectangle One side 222 is electrically connected to one edge 2 1 1 of the first ground plane 2 1 such that the first 21 and the second ground plane 22 are combined to form an inverted L-shaped 'the second ground plane 2 2 And having a constant hole 2 2 1 . The radiating element 23 mainly includes: a first sub-radiation element mi, substantially perpendicular to the first ground plane 22, and having a shape substantially a hollow cone having a vertex 2 3 3 and a circular opening 2 3 2 of the vertex, the vertex 2 3 3 faces the second ground plane 22, and the through hole 221 is located on the second ground plane 22

I, p. 13, 1 272 502. V. Inventive Note (6), the vertex 2 3 3 is the feed point of the antenna; a second sub-radiation element 2 3 4 is substantially perpendicular to the second ground plane 22, and has a substantially uniform shape. a hollow cylindrical shape having an upper circular opening 2 3 5 and a lower circular opening 2 3 6 opposite the upper circular opening 2 3 5 , the lower circular opening 2 3 6 edge being electrically connected to the first The circular opening 2 3 2 edge of a sub-radiation element 2 3 1 . Figure 10 is a structural view of another embodiment of the radiating element of the antenna of the present invention; the opening of the first sub-radiating element may be an elliptical [Fig. 10 (a)], a rectangle [Fig. 10 (b) ) or a polygon [Fig. 10 (c)], or a structure having a slit 63 8 [Fig. 10 (d)]; and the cylindrical section of the second sub-radiation element may be an elliptical shape [Fig. 10 (a)], a rectangle [Fig. 10 (b)] or a polygon [Fig. 10 (c)], or a structure having a slit 73 7 [Fig. 10 (e) In view of the above description, the antenna of the present invention has a simple structure, a low manufacturing cost, and a clear function. Therefore, the antenna of the present invention has a high industrial application value and is sufficient for the scope of the invention. The embodiments described in the above description are merely illustrative of the principles of the device of the present invention and its effects, and are not intended to limit the invention. Therefore, those skilled in the art can modify and change the above embodiments without departing from the spirit of the invention. The scope of the invention should be as set forth in the appended claims.

Page 14 1275202 Schematic description of the drawings Fig. 1 is a structural view of an embodiment of the antenna 1 12 A of the present invention. The 罘Z diagram is the antenna of the present invention. Figure 3 is the antenna of the present invention; 歹, return loss measurement result. Measurement results. The yoke example operates on the light field type of 2045 MHz. Fig. 4 is the result of the radiation ρ β measurement of the embodiment of the present invention operating at 2442 MHz. ~ 知射%型 Fig. 5 is a measurement result of the antenna of the present invention. The actual example operates on a light field type of 55 〇〇 MHz. Figure 6:: 'Bright antenna _ Example 8 〇 〇 Measurement results. ~ Fine shot % type Fig. 7 is the antenna 1 sound of the invention # /1 ± ^ ? 艮 The yoke example operates at 1 〇 5 GHz.知射%型 The brother 8 is the antenna gain measurement result of the antenna #一 , 0 ^ ^ ^ of the invention. Fig. 9 is a structural view showing another embodiment of the antenna of the present invention. Fig. 10 is a structural view showing another embodiment of the radiating element of the antenna of the present invention.

Page 15 1272202 Brief Description of the Drawing [Component Symbol Description] 1 Ultra-wideband monopole antenna of the present invention - an embodiment 11 ^* (system) ground plane or system ground plane 111 of the mobile phone 1st one of the first ground planes π 119 112 One of the first ground planes lacks π One of the first edges 113 One of the first ground planes lacks V _ A second edge 12 Second (antenna) Ground plane 121 Via-hole 122 One side of the second ground plane 13 the radiating element 131 the first sub-radiation element 132 a circular opening on the first sub-radiation element 133 one of the apex of the first sub-radiation element and the feeding point of the antenna 134 the second sub Radiation element 135 on the second sub-radiation element - upper circular opening V 136 one of the second sub-radiation elements below circular opening V 2 Another embodiment of the ultra-wideband monopole antenna of the present invention 21 One (system) ground plane or mobile telephone system ground plane 211 one edge of the first ground plane 22 second (antenna) ground plane 221 through-hole ho 1 e 222: one side of the second ground plane

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1275202 Brief description of the drawing 23: radiating element 2 3 1 : first sub-radiating element 2 3 2 . · one circular opening on the first sub-radiating element 2 3 3 : one of the apex of the first sub-radiating element and the antenna Feed point 234: second sub-radiation element 2 3 5 : one of the second sub-radiation elements above the circular opening 2 3 6 : one of the second sub-radiation elements below the circular opening 3 3 : radiating element 3 3 1 a first sub-radiation element 3 3 2 : an elliptical opening 3 3 3 on the first sub-radiation element: a vertex on the first sub-radiation element and a feed point 334 of the antenna: the second sub-radiation element 3 3 5 : an upper elliptical opening on the second sub-radiation element 3 3 6 : one of the second sub-radiation elements below the elliptical opening 4 3 : the radiating element 431 : the first sub-radiation element 4 3 2 : the first sub-radiation element One of the upper rectangular openings 4 3 3 : one of the apexes on the first sub-radiation element and the feed point of the antenna 4 3 4 : the second sub-radiation element 4 3 5 : one of the upper sub-radiation elements above the rectangular opening 4 3 6: a rectangular opening below one of the second sub-radiation elements

Page 17 1275202 Brief description of the diagram 5 3 : Radiation element 5 3 1 : First sub-radiation element 5 3 2 : One of the first sub-radiation elements of the polygon opening 5 3 3 : one of the apexes of the first sub-radiation element Feed point 534 of the antenna: second sub-radiation element 5 3 5 : one of the upper sub-radiation elements above the polygonal opening 5 3 6 : one of the second sub-radiation elements below the polygonal opening 6 3 : the radiating element

6 3 1 : first sub-radiation element 6 3 2 : one circular opening 6 3 3 on the first sub-radiation element: one vertex on the first sub-radiation element and the feeding point of the antenna 6 3 4 : second sub- Radiation element 6 3 5 : one of the second sub-radiation elements above the circular opening 6 3 6 : one of the second sub-radiation elements below the circular opening 6 3 7 : one of the second sub-radiation elements slit 638: One slit on the first sub-radiation element

73: radiating element 731: first sub-radiation element 7 3 2 : one circular opening 7 3 3 on the first sub-radiation element: one vertex on the first sub-radiation element and the feeding point 734 of the antenna: second sub Radiation element 7 3 5 : a circular opening above one of the second sub-radiation elements

Page 18 1275202 Schematic description of the diagram 7 3 6 : a circular opening below one of the second sub-radiation elements 737: a slit on the second sub-radiation element

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Claims (1)

1275202 VI. Patent Application Range 1. An ultra-wideband monopole antenna suitable for a mobile phone, comprising: a first (system) ground plane having a shape substantially a rectangle having a shape substantially at one corner of the rectangle a notch having a rectangle having a first edge and a second edge substantially perpendicular to the first edge; a second (antenna) ground plane substantially perpendicular to the first ground plane and having a substantially rectangular shape, wherein one side of the rectangle is electrically connected to the first edge of the gap of the first ground plane, the first a grounding surface having a uniform hole; and a radiating element, comprising: a first sub-radiation element substantially perpendicular to the second ground plane, having a shape substantially a hollow cone having a vertex and a side to the vertex An opening, the vertex is toward the second ground plane, and is located at the through hole of the second ground plane, the vertex is a feeding point of the antenna; and a second sub-radiation element substantially perpendicular to the second ground plane and having a substantially hollow cylindrical shape having an upper opening and a lower opening opposite to the upper opening, the lower opening edge being electrically connected to the first sub- The edge of the opening of the radiating element. 2. The ultra-wideband monopole antenna of claim 1, wherein the opening shape of the first sub-radiation element is the same as the shape of the lower opening of the second sub-radiation element. The invention relates to an ultra-wideband monopole antenna according to claim 1, wherein the opening shape of the first sub-radiation component can be selected from a circular shape and an elliptical shape. A group consisting of a rectangle and a polygon. 4. The ultra-wideband monopole antenna according to claim 1, wherein the cylindrical shape of the second sub-radiation component is selected from the group consisting of a circle, an ellipse, a rectangle, and a polygon. One group. 5. The ultra-wideband monopole antenna of claim 1, wherein the first sub-radiation component has a slit. 6. The ultra-wideband monopole antenna of claim 1, wherein the second sub-radiation component has a slit. H An ultra-wideband monopole antenna suitable for mobile phones, comprising: a first (system) ground plane having a shape substantially rectangular; a second (antenna) ground plane substantially perpendicular to the first ground plane and having a substantially rectangular shape, wherein one side of the rectangle is electrically connected to one of the edges of the first ground plane, such that the first and second The ground plane is combined to form an inverted L-shape, and the second ground plane has a uniform hole; and a radiating element mainly includes: a first sub-radiation component substantially perpendicular to the second ground plane and having a substantially hollow shape Conical, with a vertex and one side Page 21 1275022 6. The opening of the patent application range point, the vertex is facing the second ground plane, and is located at the through hole of the second ground plane, the vertex is the feeding point of the antenna; and a second The sub-radiation element is substantially perpendicular to the second ground plane and has a substantially hollow cylindrical shape, and has an upper opening and a lower opening opposite to the upper opening, the lower opening edge being electrically connected to the first sub-radiation component The edge of the opening. 8. The ultra-wideband monopole antenna of claim 7, wherein the opening shape of the first sub-radiation element is the same as the shape of the lower opening of the second sub-radiation element. 9. The ultra-wideband monopole antenna according to claim 7, wherein the opening shape of the first sub-radiation component is selected from the group consisting of a circle, an ellipse, a rectangle, and a polygon. a group of people. The ultra-wideband monopole antenna according to claim 7, wherein the cylindrical shape of the second sub-radiation component is selected from a circular shape, an elliptical shape, a rectangular shape, and a polygonal shape. Form a group of people. 1 1. The ultra-wideband monopole antenna of claim 7, wherein the first sub-radiation element has a slit. 1 2. The ultra-wideband monopole antenna according to claim 7 of the patent application, wherein Page 22 1275202 VI. Patent Application The second sub-radiation element has a slit. Hliil