TW554566B - Integrated dual-band printed monopole antenna - Google Patents

Abstract

An integrated dual-band printed monopole antenna includes a microwave substrate, a first dual-band monopole antenna, a second dual-band monopole antenna and a ground plane. The substrate has a first surface and a second surface. The first and the second antennas are disposed on the first surface of the substrate and each is excited by a first or a second microstrip feeding line through a first or a second feeding port. The first and the second dual-band monopole antennas both include a first horizontal radiating metallic line, a second horizontal radiating metallic line and a vertical radiating metallic line. The vertical radiating metallic line has a feeding point in one end connecting to the first or the second microstrip feeding line. The ground plane is disposed on the second surface of the substrate, wherein the ground plane has a main ground plane and a protruded ground plane extending between the first and the second antenna.

Description

554566 V. Description of the invention (1) ----- [Field of invention] A month is about an antenna system, and more about an integrated dual-frequency printed single dipole antenna applied to a wireless local area network. [Prior art]

Ik ^ The rapid development of wireless communication, and everyone ’s requirements for communication quality are becoming more and more important. Vietnam ’s current products not only pay attention to lightness, shortness, but also good and stable communication. Ασ I ’However, the multiple path attenuation effect significantly reduces the system. Therefore, antenna diversity needs to be used to overcome the multiple path attenuation effects of wireless communication systems. Antenna diversity, which is customary for β ’, is achieved by frequency diversity, time diversity, or spatial diversity. In frequency diversity, the system is switched between different frequencies' to overcome multiple path attenuation effects. In a time diversity system, signals are transmitted or received at different times to overcome multiple path attenuation effects. In a spatial diversity (spatial d i v er s i t y) system, two or more antennas are placed in different spatial locations to overcome multiple path attenuation effects. U.S. Patent No. 5,99 0,838, issued to Burns et al. On November 23, 1999, with the invention name "Dual Orthogonal Monopole Antenna System", which A spatial diversity antenna system is disclosed, which has a pair of single dipole antennas, which are located on the upper and lower surfaces of a printed circuit board with a first and a second dielectric layer, respectively, and a ground plane. Conductive layer

00500.ptd Page 5 554566 V. Description of the invention (2) Between the first and second dielectric layers, j: the middle sister 2 is straight, a feeding circuit is coupled to the pair; Mutual system. Ding early dipole antenna, connected to a main US patent No. 5,990, 838 although rQitv has been described ^ has been provided for a spatial diversity (spatial di versi < big green system, to try to change the helmet Xilang, but Xiji said that the multi-path reduction effect of wireless communication systems, but L is only applicable to the two feed ports of a single-band system. It is still not jealous of the society and the 4-antenna S21 is higher than- 20 dB). In addition, the isolation degree (the isolation degree of the seal layer, the board 20,000 has a complicated structure and high manufacturing costs. Therefore, it is necessary to find a solution that can effectively solve the problem. The antenna system described in the prior art is applicable to the operation of dual bands such as 2.4 gHz and local area network systems. At the same time, it can be used from μ * '' '^ ^ [Summary of the invention]… Multiple line condition systems Path Attenuation Effect The main purpose of the present invention is to provide an integrated dual-frequency printed single dipole hall J, in order to obtain dual-band operation capability, which can be applied to operations such as 2 4 GHZ / 5. 2 GHz wireless local area network systems. The secondary object of the present invention is to provide an integrated dual-frequency printed single dipole antenna, which has better isolation between the two feed ports of the antenna, so as to be effective. Multiple path attenuation effects of wireless communication systems Another object of the present invention is to provide an integrated dual-frequency printed single dipole antenna, which has a simple structure and can be manufactured at a low cost. To achieve the above object, the present invention provides an integrated dual-frequency printed single-dipole beta antenna , Its main Contains a microwave substrate, a first dual-frequency single dipole sky 00500.ptd page 6 554566

The line, the first line, the first line, the first line, and the mutual band feed line antenna all include a first dual-frequency single-odd surface, and a first and second dual-frequency vertical. The substrate of the first or first antenna and a second surface of a ground plane. The early dipole antenna is a line via a surface of the substrate and a vertical spoke. The second horizontal direct-radiation gold feed water. The vertical radiant gold-ray metal wire is a line-connected in-line laser radiation. The metal wire is a wire. The first end, the end position is connected to the first (open end) of the first end facing the same other glyph. The first and second pairs of the vertical radiation constitute the (lower) operating line to the second operating line. Therefore, the radiating metal line to the antenna operates at the operating frequency. For the other two horizontal radiation resonance paths, the antenna may have the first first outer, determine the dual-band position from the metal wire, and extend the dipole sky horizontal light resonance direction. The operation of feeding the open-end antenna is set on the substrate. The first single dipole antennas are all m—a younger brother and a dual-frequency single dipole, and a second horizontal radiating metal horizontal radiating metal wire is connected to the opposite end of the feed port. The horizontal light emitting metal wire and the vertical and Two horizontal radiating metal wires are extended, so that the antenna forms an F-line, both of which pass from the feed port through the open end of the radio wire, and determine the path of the first port of the antenna via the vertical light beam to constitute the antenna operation. Second (higher) operating frequency capability. The ground plane is located on the second surface of the substrate. The main ground plane of the ground bread 3 and a protruding ground plane extend between the first and second antennas. The main ground plane is a rectangle or an approximate rectangle. , Which has two adjacent truncated angles, which are respectively cut into a 45-degree cutting plane, and the length f of both sides of the truncated angle is the same. The first and second dual-frequency single dipole antennas are respectively disposed on two truncated sides of the main ground plane, and are arranged perpendicular to (9 {) degrees with the truncated sides.

554566

(Angle + angle α) and their orientations are symmetrical to each other over the protruding ground plane, so that the ground plane can effectively reduce the amount of coupling between two dual-frequency single dipole antennas, and obtain good isolation to obtain good Impedance matching. [Explanation of the Invention] Although the present invention may be embodied in different forms of embodiments, those shown in the drawings and those described below are the preferred embodiments of the present invention. The invention is an example and is not intended to limit the invention to the specific embodiments illustrated and / or described. Please refer to FIG. 1, an integrated dual-frequency printed single dipole antenna 1 mainly includes a microwave substrate 4 〇, a first dual-frequency single dipole antenna 丨 0, and a second dual-frequency single dipole antenna 20, And a ground plane 30. The microwave substrate 40 has a first surface 41 (upper surface) and a second surface 42 (lower surface), wherein the first dual-frequency single dipole antenna 10 and a second dual-frequency single dipole antenna 2 The system is located on the first surface 41 of the microwave substrate 40 and is perpendicular to each other, and the system 30 is located on the second surface 42 of the microwave substrate 40. The ground plane 30 includes a main plane 31 and a protruding ground plane 32 extending between the first dual-frequency single dipole 10 and a second dual-frequency single dipole antenna 200. According to the present invention, the microwave substrate 40 is generally a printed circuit board made of glass fiber reinforced BT (bismaleimide-triazine) resin or FR4 fiberglass reinforced epoxy resin (polyimide). polyimide) flexible film substrate. The first dual-frequency single-dipole antenna 10 and a second dual-frequency single-dipole antenna 20 are printed on the microwave substrate 40. The first surface 41, and the ground plane 30 is printed on the microwave substrate 40. Surface 42

00500.ptd Page 8 554566 V. Description of the invention (5) --- On. The first dual-frequency single-dipole antenna 20 and the second dual-frequency single-dipole antenna 20 according to the present invention have substantially the same structure. Referring to FIG. I, the dual-frequency single-dipole antennas 10 and 20 mainly include a first horizontal radiation metal wire, a second horizontal radiation metal wire, a vertical radiation metal wire, and a feed point. The first surface 41 of the microwave substrate 40 has a feed-in metal wire 14. The first and first horizontal radiation metal lines 11 and 2 and the vertical radiation metal lines 3 are printed on the first surface 41 of the substrate 40, and the vertical radiation metal lines 13 are substantially irradiated with the first horizontal radiation. The metal line 丨 丨 is perpendicular to the second horizontal radiation metal line 12. The feeding point 16 is located on the vertical radiation metal line 丨 3, and is used to connect the feeding metal line 14 and the vertical radiation metal line 13 so as to transmit information. In this embodiment, the first horizontal radiating metal wire 丨 丨 is connected to or near one end of the vertical radiating metal wire 13 and the end is located at the opposite end of the feeding point 丨 6 and the second horizontal radiating metal wire丨 2 Connected to different positions where the first horizontal shot metal wire 11 and the vertical round shot metal wire 13 are connected, and the other ends (open ends) of the day and two horizontal radiation metal wires 11 and 12 face the same direction = extension, The antennas 10 and 20 are formed into an F-shape. In the embodiment shown in Fig. I, the F-shaped dual-frequency single dipole antennas 10 and 20 are arranged back-to-back. The path from the feeding point 16 through the vertical radiating metal wire 13 to the open end of the first horizontal light-emitting metal wire 11 constitutes the first resonance path of the dual-frequency single dipole antenna 10 and ^ operation, and determines The first (lower) ^ mulberry operating frequencies of the antennas 10 and 20. In addition, the path from the feeding point 16 through the vertical radiation metal wire 13 to the open end of the second horizontal radiation metal wire 12 constitutes the antennas 10 and 2 ^

00500.ptd Page 9 554566 V. Description of the invention (6) The second resonance path, and determine the second (higher) operating frequency of antennas 10 and 20. The main ground plane 31 is preferably rectangular or approximately rectangular, and the protruding metal ground plane 32 is also rectangular or approximately rectangular. In addition, in order to make the two dual-frequency single dipole antennas 10 and 20 perpendicular to the edge of the main metal ground plane 31 (90 degrees), the two angles of the main ground plane 31 Adjacent corners are cut into a 45-degree cut plane, and the radiating metal wires of the single dipole antennas 10 and 20 are placed vertically on the sides of the cut corner. The first and first dual-frequency single-dipole antennas 10 and 20 are respectively excited by a first microstrip feed line 14 through a first feed port 14. The microstrip feed line 14 is preferably a 50 ohm microstrip line. . The first and second dual-frequency single-dipole antennas 10 and 20 have the same structure, the same size, and are configured symmetrically to the protruding ground plane 32. The protruding ground plane 3 2 can effectively reduce the two dual-frequency single-pole antennas. The amount of surface contact between dipole antennas. An optimal value of isolation (S2i) can be obtained, so the amount of mutual coupling between the two dual-frequency single dipole antennas is greatly reduced to improve the multipath attenuation effect of the wireless communication system. The actual measurement results of the integrated dual-frequency printed single dipole antenna 1 according to the present invention are shown in Figs. 2 to 8. The experimental results of the reflection coefficient (Sii) and the isolation (Sgl) of the antenna of the present invention are shown in Fig. 2. As shown in Figure 2,

In the 2.4 GHz band (2400-2484 MHz) and the 5.2 GHz band (5 1 50-5350 MHz) of the local area network, the reflection coefficients of all frequencies are below -1 () dB ', which means that its impedance matching is greatly improved, and The isolation of both feed ports is below -28 dB, so it can provide better isolation. Figures 3 to 6 show the two feed ports at 2450 MHz and 5250 MHz.

00500.ptd Page 10 554566 Description of the invention (7)-Field scraping: type experimental results, from which we can see 'radiation of two feed ports G :::: weighing' and the combination of the two can provide the present invention Antenna-large 245Π 3 盍 range. Fig. 7 and Fig. 8 are the experimental results of gains of the antenna of the present invention operating in the 4bO MHz and 5250 MHz bands, respectively. From the obtained results, it can be seen that the antenna has a good gain. The (b) and (b) diagrams are structural diagrams of other embodiments of the integrated dual-frequency printed single dipole antenna of the present invention. As shown in Figure 9 (a)

Two two ... member single dipole days fine, 92. The first horizontal radiation j belongs to the center line. The first horizontal radiation metal line 912 and the vertical radiation metal line 913 =, and in the embodiment shown in FIG. 9 (b), two of F = U = , 92 ° can be placed face to face (compared to Figure 1: :: The foregoing description and illustration have revealed the better of the present invention, and must be solved to add, many modifications and substitutions may be used in the present invention. Example without departing from the spirit and scope of the principle as shown in the appended patent scope. ㈣ The artist will _ use: in many forms, structures, arrangements, proportions, 元, yuan I ::; modifications. Because: "The embodiments disclosed herein are from all perspectives" and should be considered to illustrate the invention, not to limit the invention: The scope should be defined by the scope of the appended patents and cover their combination. Things are not limited to the previous description.

00500.ptd Page 11 554566 Brief description of the diagrams [Illustration] Figure 1 is a structural diagram of an integrated dual-frequency printed single dipole antenna of the present invention; Figure 2: is an antenna according to an embodiment of the present invention The experimental results of the inverse miscellaneous C ..— and the isolation (S21), FIG. 3 is a radiation field type experimental result of the antenna's first feed port at 2450 MHz according to an embodiment of the present invention; FIG. 4 is a light field type experiment result of the second feeding port of the antenna at 2 450 Μ 根据 z according to an embodiment of the present invention; FIG. 5 is a first feeding of the antenna according to an embodiment of the present invention Radiation field experiment at 5250 MHz Surname: Yang: The antenna according to the present invention _, =, Example: Feeding the results of radiation field experiments at MHz; Field Antenna according to an embodiment of the present invention Measurement results of the antenna gain in the 2.4 GHz wireless zone system frequency band; FIG. 8 is a measurement result of the antenna gain in the system bandwidth of the road system according to the present invention; and, FIG. 9b. Figure: Dual-frequency printed single dipole sky according to other embodiments of the present invention [Illustration of the drawing number] | Integrated dual-material dipole antenna 0 First dual-frequency single dipole antenna 11 First horizontal radiation metal wire 12 Second level Radiation wire

00500.ptd Page 12 554566 Brief description of the diagram 13 Vertical radiation metal wire 14 Microstrip feed line 15 Feed port 16 Feed point a The first (second) dual-frequency single dipole antenna and the main ground plane 31 truncated edges Angle 20 Second dual-frequency single dipole antenna 30 Ground plane 31 Main ground plane 32 Protruding ground plane 40 Microwave substrate 41 First surface 42 Second surface 9 1 0 First dual-frequency single dipole antenna 9 11 First level Radiation metal wire 9 1 2 Second horizontal radiation metal wire 9 1 3 Vertical radiation metal wire 9 2 0 Second dual-frequency single dipole antenna 9 3 1 Main ground plane 932 Protruding ground plane 70 702, 801, 802 Curve

00500.ptd Page 13

Claims (1)

554566 VI. Scope of patent application 1. An integrated microwave substrate with a first dual-band from a first microstrip, a second dual-band from a second microstrip, a ground plane, between the main ground plane and a pole antenna, Double-frequency printing. The substrate has a single dipole antenna feed line, an early dipole antenna feed line, and an early dipole antenna protruding from the base. The antenna includes a first surface and a second surface line. A surface is excited by a first feed port; a line on the first surface of the substrate is excited by a second feed port; and on the second surface of the board, the ground plane ground extends on the first and second A vertical radiating metal line including the first radiating metal and the second radiating metal is inserted into the line. The first horizontal and second horizontal band-fed dual-frequency single dipole antennas each include a line; a line; and one end thereof is a feed point connected to the first or second line of the integrated dual-frequency printed single-pole as described in the item The pole's two ends, which are located at the same point of the feed point :: the connection of the metal line = the end of the subordinate line and the vertical metal line) in the same direction: = the other-end of the metal line (The opening J and Xun Shen make the antenna form an F-shape. 00500.ptd S Page 14 554566 VI. Patent application scope Radiation metal wire opening di μ ^ ^ diameter, and determine the first resonance path of the antenna d low-structure operation :: ~ Combined dual-frequency printed single dipole * The open end of the radiating metal wire is from Λΐΐ; ΐ line to; the path of the second horizontal wide 2 1 ^ constitutes the second resonance path of the antenna operation, and determines the antenna's The second (higher) operating frequency. 5. The integrated dual-frequency printed single dipole antenna as described in item 1 of the scope of patent application, wherein the main ground plane is a rectangular or approximately rectangular shape with two phases on it. The adjacent truncated angles are worn into a 45-degree cut. 6 · Rushen The integrated dual-frequency printed single dipole antenna described in item 1 of the patent scope, wherein the first and second microstrip feed lines are 50 ohm microstrip lines. 7. The integrated dual-frequency printed mono-dipole antenna according to item 1 of the scope of the patent application, wherein the first and second mono-dipole antennas are symmetrical to the protruding ground plane. 8 · The integrated dual-frequency printed single dipole antenna as described in item 1 of the scope of the patent application, wherein the far-vertical shot wire is substantially straight with the first and the second horizontally-controlled shot wires. 9 · Integrated dual-frequency printing single dipole sky as described in item 1 of the scope of patent application 00500.ptd Page 15 554566 6. Scope of patent application, wherein the widths of the first horizontal radiation metal line, the second horizontal radiation metal line, and the vertical radiation metal line may be different. ini 00500.ptd Page 16