TW538561B - Integrated dual polarization printed monopole antenna - Google Patents

Abstract

An integrated dual-polarization printed monopole antenna comprises the followings: a microwave substrate, which has the first surface and the second surface; a first monopole antenna, which is disposed on the first surface of the substrate, fed into the line by the first 50 Omega micro-strip and excited by the first feeding port; a second monopole antenna, which is disposed on the first surface of the substrate, fed into the line by the second 50 Omega micro-strip and excited by the first feeding port such that the second monopole antenna is perpendicular to the first monopole antenna; and a metal grounding plane disposed on the second surface of the substrate, in which the grounding plane contains a main metal grounding plane and a protruding metal grounding plane that extends between the first and the second monopole antenna.

Description

538561 V. Description of the Invention [Field of the Invention] The present invention relates to an antenna system, and more particularly to an integrated dual polarization printed single dipole antenna for a wireless local area network, which provides polarization d1Versity to Solve the multiple path attenuation effects of wireless communication systems. [Xianru Technology] With the rapid development of wireless communication m, everyone's requirements for communication quality are getting higher and higher. Today's products are not only light and thin, but also must have good and stable communication quality. In addition, multipath attenuation The effect further reduces the communication quality of the system. Therefore, antenna diversity needs to be used to overcome the multiple path attenuation effects of wireless communication systems. Generally, the antenna diversity used in the g ′ category is achieved by frequency diversity, time diversity (t i mep ~, diversity), or spatial diversity (spatial diversity). Yu Win: In frequency diversity, the system is switched between different frequencies' to overcome the multipath attenuation effect. In a time diversity (ti m e d i ver s it ty) system, signals are transmitted or received at different times to overcome multiple path attenuation effects. In a spatial diversity system, two or more antennas are placed at different spatial positions' to overcome the multipath attenuation effect. U.S. Patent No. 5,9 0,8 3 8 issued to Burns et al. On November 23, 1999, with the invention name "Dual Orthogonal Monopole Antenna System" ", Which reveals a spatial diversity antenna system, which has

538561 V. Description of the invention (2) $ :: Ma Jitian, Chongdao is located—printing with the first and second dielectric layers = the surface of the board T—the ground plane (grundund ρΐ_) conductive layer design Γ ί : And younger two, | between the electrical layers, where the pair of single dipole antennas are perpendicular to each other. The betel electric coupler is connected to the pair of single dipole antennas, and it is connected to a main US patent No. 590,83 8 although it has provided tiai ΓΓ two lines, and systems to improve the wireless communication system-multiple paths (s21), in order to overcome the reflection coefficient (s ") of multiple paths and the isolation number 5,99〇, 838, it is necessary to use agricultural / saline / wenying. Moreover, the United States has the highest cost. The printed substrate of the Xi layer has a complicated structure and causes, so it is necessary to seek—including the antenna system, to get the best solution to the previous technical problems to overcome the wireless communication system I :: to =) and separate calls ^ [Summary of the invention 】 Dong Lu t agricultural reduction effect. _ The main purpose of the present invention is the antenna, in order to obtain the best response ;; = multiple and polarized printed single dipole service wireless communication system multiple and isolation; the secondary purpose of the present invention is to provide an antenna, which Polarization diversity (pola ^ z = '-type dual-polarization printed single dipole communication system with multiple path attenuation effects 1 should be like ... can solve the wireless Another object of the present invention is to provide a human antenna, the structure is simple and low Manufacturing cost: Oral and polarized printing single dipoles: ...

P〇l-157.ptd Page 5 538561 V. Description of the invention (3) The line mainly includes: a microwave-based two surfaces; a first 'single dipole and a first 50 ohm microstrip feed plate' The substrate has an antenna , Located on the line, by a first single dipole antenna, on the first band feeding line of the board, by a second feeding the first second metal connection according to the approximate moment cut according to the long straight and one 90 degrees is doubled according to or approximately the same, which is based on a single dipole antenna with a good dipole path on the surface of each other, and the grounding ground extends along the vertical direction of the incoming port; the surface includes the first and the surface, And a second feature of the present invention is one gold and one main gold. The lengths of the adjacent wearing corners of the main metal are the same. Another feature of the present invention is that the first and the lengths are both ground shapes. Two radiating metal wires on two sides and at a load angle, which protrude from the main metal connection, two first surfaces cut off with a first surface and a first plate, are excited by the feed port; a second 'by a second 50 ohm micro this second single dipole antenna and the ground plane Located between the metal ground plane and a projection of the dipole antenna plate. The ground plane is a rectangle or is cut off to a 4 5 ^ 〇 The first single dipole antennas are all and resonate at 1/4 wavelength, at the corners, and at the truncated angles. Another special rectangle 'of the present invention has one side whose length is about the width and the width is about the first. According to the present invention, the amount of engagement between the protruding lines is impedance matching. The experimental results of the embodiment of the present invention are that the protruding metal ground plane is 1.5 and the second single dipole antenna with the first and second monodipole antenna lengths of two truncated angles connected to the main metal ground plane at a moment g. 0.8 times the length. The metal ground plane can effectively reduce the two branches, that is, to obtain good isolation and help = = The antenna is designed in the 2.4-GHz wireless area. ^ It is shown that using this prominent metal ground plane at MHz can make two Within the operating band of a single dipole antenna (2 4 0 0- 2484

P〇l-157.ptd Page 6 538561 V. Description of the invention (4) The m-degrees are all 27d ^ ~ The results also show that the antenna has a ^ = target-only radiation field-type measuring line structure is simple and easy to make. Korean shooting characteristics. In the present invention, the circuit is integrated into the heart; the second is called ‘, and at the same time it is very easy to be related. [Explanation of the invention], ... ,, & Although the present invention can be described in the following and is exemplified in the form of ^ = form, the figures shown in the drawings are considered as ς = 可 j, a preferred embodiment, and please understand that the present invention is limited to The icon and / are = examples, and Asian and African are intended to be used, please refer to page! As shown in the figure, an example of a fixed b ". It mainly includes a microwave substrate 40, a first / chemically printed single dipole antenna 1, a dipole antenna 20, and inverse = Gongli j —early dipole antenna 10, A second single Γ ^; 2 ton ^; ^ a surface 42 (lower surface) of the bean, γ 40 in the bean; a line 10 and a second single dipole antenna 2 ° are located on the surface 41 of the microwave substrate 40, And are perpendicular to each other, and the main metal ground plane 31 ^ is on the second surface 42 of the microwave substrate 40 and has a protruding metal connection 32 extending to the first single dipole antenna 10 and a second single dipole antenna According to the present invention, the microwave substrate 40 is generally a printed circuit board made of glass fiber reinforced BT (bi smalei mi de-triaz ine) resin or FR4 glass fiber reinforced jujube, resin (fiberglass reinforced epoxy resin). Flexible film substrate made of polyimide (p ο 1 yimide). The first single dipole antenna i0 and the second single dipole antenna 20 are printed on the microwave substrate 40. The first surface 41 is printed on the second surface 42 of the microwave substrate 40.

P01-157.ptd Page 7 538561 V. Description of the invention (5) The main metal ground plane 31 is preferably rectangular or approximately rectangular, and the protruding metal ground plane 3 2 is also rectangular or approximately rectangular. In addition, in order to make the two single dipole antennas 10 and 20 perpendicular to the edges of the main metal ground plane 31 (90 degrees) (angle α), the two The adjacent corners are worn into a 45 degree cut plane, and the radiating metal wires of the single dipole antennas 10 and 20 are vertically placed on the sides of the worn corners. The first and second single dipole antennas 10 to 20 pass through a first microstrip feed line 丨 1 and a second microstrip feed line 21, respectively, from a first feed port J 2 and a second feed The input port 22 is excited; the first microstrip feed line 11 and a second microstrip feed line 2 are 50 ohm microstrip lines. The two single dipole antennas 0 and 20 are both long and straight radiating metal wires with the same length, resonating at 1/4 wavelength, and symmetrical to the protruding metal ground 32. The protruding metal ground plane 32 can effectively reduce the amount of engagement between two single dipole antennas; by appropriately adjusting the length L and width D 1 of the protruding metal ground plane, and the arrangement of the single dipole antenna (The distance between the single dipole antenna and the inner end of the truncated edge of the main metal ground plane can reach an optimal value of isolation, so the mutual coupling between the two single dipole antennas can be greatly reduced. Ideal isolation. According to the integrated dual-polarized printed single dipole antenna 2 of the present invention, the antenna implementation results are shown in Figs. 2 to 8. Fig. 2 is the astronomical coefficient (Sll) of the present invention. And the isolation (s2i) experiment (qu 2 0 2) results. Appropriate selection of appropriate projections; supply / curve curve to an optimal value of isolation, 伃 ia ^, η Η * /-FREE in the figure. ^ It can be seen that the experimental and simulation results are quite close to the results of the middle, the, and the °. On the same day, when the wireless LAN is at 2 (240 0-2484 MHz), the reflection loss of all Beige f frequencies is -20 dB. To

538561 V. Description of the invention (6), its impedance is very good, and the isolation of the two feed ports is below -2 7 d B, Hao has very good isolation. Figures 3 to 5 illustrate the protruding ground metal surface 32 at different lengths L and D1, and the placement of the early dipole antenna at different positions (the inner end of the truncated edge of the early dipole antenna and the main metal ground plane). The distance d) between points will affect the reflection coefficient and isolation of the antenna.

In Figure 3, the curves 3101, 3002, 3303, and 304 are the test results of the protruding ground metal surface 32 at different lengths l equal to 32, 44, 22, and 0 mm, respectively; Among them, the result of the curve 3 0 1 (the same as the curve 2 0 1 in the second figure) is the best, and the isolation of the two feeds is the best; at this time, the length [is approximately equal to 1.5 times the length of the single dipole antenna. . In Figure 4, the curves 40m, 402, and 4.03 are the protruding grounding gold ^ 31. The experiments obtained under different widths Di equal to 17, 22, and '/ 、 China-Israel curve 4 〇1 (the same as the curve 2 in Figure 2 and Figure 3: Curve 3 01) has the best results, and the two feed ports have the best isolation; the width t is approximately equal to A single dipole antenna is 0.8 times longer. Expose

Green, medium, curves 501, 502, 503, and 504 are the positions of the single dipole sky and Kashan 5, respectively (the distance d between the single dipole antenna and the main metal ground plane wearing a corner edge = point = is equal to ◦). And 15)) = ^ Curve green ini curve 501 (same as curve 201 in Figure 2 and Figure 3 has the best isolation: T curve 401) The result is the best. . At this time, the distance d of the sub-second is approximately equal to 0,25 of the length of the single dipole antenna. ‘The two feed 1 tests also found that the effect of changing the distance between the two feed ports W and the isolation of the port is very small.

538561 V. Description of the invention (7) ^ Figure + and 7th are the first and second feeds, respectively, and the radiance at 245 0 MHz is a% type experimental junction I; it can be seen from the results that the radiation of the two feed ports The field two has symmetry, and both the E and Η planes are perpendicular to each other, showing a good ^ polarized round shot. Fig. 8 is the result of the real eyelid gain of the antenna of the present invention operating at 24 50 MHz π. From the obtained results, it can be seen that the antenna has a good gain. /, Ϊ The figure shows other implementations of the protruding metal ground plane 32 in the antenna of the present invention: The metal ground plane of the woman can also be a T-shaped or a trapezoidal gold, and one side is connected to the two of the main metal ground plane 31 The ground plane that belongs to the original two can also effectively reduce the amount of coupling between the p-level flat dipole antennas that are not f, so that the two feed ports can help to obtain good impedance. match. Although the "mentioned illustrations just now have been disclosed, it is necessary to understand the various added, many modified, and illustrated preferred embodiments, which must be the preferred embodiments, without departing from the spirit of the more obvious principles of the present invention that may be used. Inverse scope. Familiar with the technique: The practice defined by the scope is used in many forms, structures, arrangements, and both will appreciate the modification of the present invention. Therefore, "materials, elements and components disclosed herein are considered as useful In order to illustrate the present invention, rather than to use the examples in all points, the scope of the invention should be limited by the scope of the appended patent application. The invention is not limited to the foregoing description. 1 ’’ and covers its legal parity

538561 Brief description of the drawings [Illustration] Figure 1 is a structural diagram of the integrated dual-polarization printed monodipole antenna of the present invention. Figure 2 shows the results of simulation and reflection coefficient (S 丨 丨) and isolation (& 丨) of the antenna of the present invention. Figure 3 is the experimental result of the antenna fixedly protruding the width of the ground metal surface, and changing the reflection coefficient (Su) and isolation (S21) of different lengths. Fig. 4 is the experimental result of the antenna of the present invention fixedly protruding the length of the ground metal surface and changing the reflection coefficient (Su) and isolation (s21) of different widths. Fig. 5 is the result of experiment of reflecting coefficient (Sn) and isolation (S21) of changing the position of a single dipole antenna by fixing the length and width of the ground plane of the antenna of the present invention. Figure 6 shows the radiation field experiment results of the antenna's first feed port at 2450 mhz. Fig. 7 is a radiation field type experiment result of the antenna's second feed port at 2450 MHz. Figure 8 shows the experimental results of the gain of the antenna operating in the 245 MHz band. Fig. 9 is a structural diagram of another embodiment of a metal ground plane 32 protruding from an antenna of the present invention. [Description of Component Symbols] 1: An integrated dual-polarized printed single dipole antenna I 0: the first single dipole antenna II · the first 50 ohm microstrip feed line

P〇l-157.ptd Page 11 538561 Brief description of the diagram 12 The first one feed port (p〇rt 1) 20 The second single dipole antenna 21 The second 50 ohms: the microstrip feed line 22 the second Feed port (ρ 〇rt 2) D2 The distance between the first and second feed ports a First (second) single dipole antenna and the included angle d:: First (second two) single dipole antenna and. Distance between points 30 metal ground plane 31 main metal for ground 32 protruding metal ground plane L length of protruding metal ground plane Di: protruding metal. Width of ground plane 'degree 40 microwave substrate 41 microwave substrate first surface 42 microwave base Anti-second surface 201, 202, 30 1 to 304, 401 to 403 Within the curve 5 (Η ~ 5 Ο 4, 8 Ο 1, 8 Ο 2: Ο

P01-157.ptd Page 12

Claims (1)

^^ The scope of the OJOI application for patents is an integrated 燮 polarized printed monopole * surface; from first to first—the microwave substrate, which has a f0 3 2M —the first single dipole antenna ' :: Microstrip feed line, white 〆 first feed port is excited; Vapor Ϊ 2 t dipole sky '' is located on the first surface of the board, a second and the first-single dipole antenna are perpendicular to each other And the second single dipole antenna main metal ground plane is grounded between the first early dipole sky green ^ on the second surface of the board, the ground plane includes-the main metal ground plane and-the protruding metal ground plane The extension is located between the first and second. 2. The integrated dual-polarization printed mono-dipole antenna as described in the item g㈣1 of the application patent, wherein the black metal ground plane is-rectangular or approximately rectangular, and the bean has two adjacent truncated corners, which are respectively cut into A 45-degree cut, the length of both sides of the ^ angle is the same. .l! N 3. Integrated dual polarized printing as described in the patent application Fanyuan Item 1: line 'wherein' the second single dipole antenna is long and straight: line 'its length is the same' and resonance At the quarter-wavelength, and protruding from the two wearing angle edges that belong to the metal ground plane, they are not the same as the wearing angle edges. 4. The integrated dipole antenna described in item 3 of the application for special garden Where the first and second single dipole antennas are against the early dipole ground. τ _ Yuda out of the metal connection P01-157.ptd Page 13 538561 VI. Application for patents within 5 days: The integrated dual-polarization printing monocouple described in the eighth item of the extreme-edge connected to = = rectangular or approximately rectangular, and :: and the- The h2 early dipole antenna is h5 times the length, and its width is approximately 0.8 times the length of the younger and younger 1st pigeon antenna. The metal ground plane of the integrated dual-polarization printed single dipole sky described in item 1 of Shen Wai is a τ-shaped or trapezoidal metal plane, and two sides connected to the main metal ground plane Between the truncated angles. 7. The integrated dual-polarized printed antenna described in item 1 of the patent application, wherein the first and second microstrip feed lines are 50 ohm microstrip lines. ° 8. An integrated dual polarized printed single dipole antenna, including: a first microwave substrate, the substrate having a first surface and a second surface and a metal ground plane, located on the second surface of the plate, The connection ^ = a main metal ground plane and a protruding metal ground plane, the main metal connection system is a rectangular or approximately rectangular, with two adjacent truncated angles, truncated, a 45-degree cut surface, and The length of both sides of the truncated angle is the same; a first single dipole antenna is located on the first surface of the board and is excited by a 50 ohm microstrip feed line and excited by a first feed port. The first single line is Long and straight radiating metal wire protruding from the first side of the main metal ground plane to a 90-degree angle with the truncated edge side; and page 14 P0l] 57.ptd 538561 Sixth, the scope of patent application-a second single dipole antenna Is located on the first surface of the board, is excited by a second 50 ohm microstrip feeder line, is excited by a second feed port, and the second single dipole antenna is a long, straight radiating metal wire, protruding from On the second truncated edge of the main metal ground plane, a 90-degree angle is formed with the loading angle edge, and Single dipole antenna perpendicular to each other. 9. The integrated dual-polarized printed single dipole antenna according to item 8 in the scope of the patent application, wherein the first and second single dipole antennas are symmetrical to the protruding metal ground plane. 41 1 0. The integrated dual-polarized printed single dipole antenna as described in item 8 of the scope of the patent application, wherein the protruding metal ground plane is a rectangle or an approximately rectangular shape, and one side thereof is connected to two sides of the main metal ground plane. Between the truncated angles, and its length is approximately 1.5 times the length of the first and second single dipole antennas, and its width is approximately 0.8 times the length of the first and second single dipole antennas. Between P01-157.ptd Page 15