TWM260009U - Dual-polarization dipole antenna - Google Patents

Description

M260009 IV. Creative Instructions (1) [Technical Field to which the Creative belongs] This creative is a dual-polarized dipole antenna, especially a dual-polarized dipole antenna with a built-in switching circuit. [Previous technology] In mobile communication systems, multipath interference (Multipath fading) causes poor communication quality. This is because there are many obstacles between transmitting and receiving. These obstacles can cause electromagnetic waves to refract and reflect. The signal is not single-directional, but multi-directional. Therefore, the technology of diversity (Diversity Schemes) is usually used in mobile communication systems to solve the problem of multi-path interference, that is, transmitting two or more signals with different The receiving end achieves the purpose of increasing the signal strength of the received signal. Generally speaking, there are two types of space diversity, Polarization diversity. The former uses two linear antennas with different azimuths to receive signals from different azimuths to increase the strength of the received signal. The purpose is to receive two signals with a phase difference of 90 degrees, because when the signals are 90 degrees out of phase, the correlation (C0rre 1 ati ο η) is the worst, to achieve the purpose of increasing the strength of the received signal, The latter is a better choice because it uses fewer antennas. However, when transmitting such dual-polarized signals, a switching circuit is required to switch antenna lines with different polarization directions to transmit signals with different polarization directions. Most of the switching circuits are designed on the communication system side, and An external power source is required for the switching circuit. On the system side, there are usually large and complicated electronic circuit devices. The signal interference between these electronic circuit devices

Page 5 M260009 Fourth, the creation description (2), for wireless communication systems, is undoubtedly one of the factors affecting its communication quality. Therefore, how to simplify the system-side circuit to reduce signal interference factors and improve its overall efficiency, Become a researcher's problem to be solved. [Creation content] In view of the problems and shortcomings of the previous technology, this creation proposes a dual-polarized dipole antenna with a built-in switching circuit. By integrating the switching circuit into a bipolar The antenna is simplified to simplify the circuit design at the system end and improve its overall efficiency. Therefore, to achieve the above purpose, the dual-polarized dipole antenna mentioned in this work contains the following modules: substrate, dual-polarized antenna, and switching circuit. The dual-polarized antenna and the switching circuit are arranged on a substrate. The dual-polarized antenna has more than one vertically-polarized antenna and more than one horizontal-polarized antenna to generate a vertical polarization direction or a horizontal polarization direction. Radiation signals, and the use of radio frequency signals and switching signals included in the input signal, by inputting voltage signals of different levels to the switching circuit, switch antenna units of different polarization directions to radiate radio frequency signals of different polarization directions. In addition, in order to enhance the directional gain of the antenna, a metal reflective plate (such as an aluminum plate or an iron plate, etc.) can be arranged in parallel on one side of the dual-polarized antenna and spaced a predetermined distance to reflect the radiation signal to a specific Direction to increase the directivity of the antenna. With this dual-polarized dipole antenna, the design of the switching circuit integrated with the antenna can simplify the circuit design at the system end and reduce signal interference.

Page 6 M260009

Fourth, the creation description (3) factors to improve its overall efficiency. The above description of the content of this creation is used to demonstrate and explain the creation of this creation and grant Taiji your patent application scope further-a step-by-step explanation, and provide this creation [Implementation] About this creation The characteristics and implementation are explained in detail below. Hereby, h = diagram for the best embodiment. Please refer to "Figure 1" for details. This is the appearance diagram of this creation. It includes a switching circuit 10, a dual-polarized antenna 20, a substrate 30, and a reflector. 40 and metal wire 50. The dual-polarized antenna 20 created in this work is a printed circuit antenna. The substrate 30 is made of a non-metal material (for example, glass fiber FR4). The required circuit pattern is made. The substrate 30 is connected to the electronic device 100 through a metal wire 50, and an input signal is inputted to the switching circuit from the first node 1 through the metal wire 50. The antenna units of different paths are switched by the switching circuit 10 to Radiation polarized radio frequency signals that are 90 degrees apart in three directions. The switching circuit 10 is arranged on the substrate 30 and switches the radiation path of the radio frequency signal to a vertically polarized antenna or a horizontally polarized antenna according to the switching signal, so that the radio frequency signal is controlled by the vertically polarized antenna or the horizontally polarized antenna. "Among them," dual-polarization antenna 20 can be divided into vertical polarization antenna units 20a according to the polarization direction, and has more than one vertical antenna line junction and structure to generate a vertical electromagnetic field shape; horizontal pole The antenna unit 20b 'has more than one horizontal antenna line structure to generate

Page 7 M260009 IV. Creation instructions (4) Horizontal electromagnetic wave field shape and use the turn signal to include the RF signal and the switching signal, by inputting voltage signals of different levels to the switching circuit 10 Switching of antenna paths.

In addition, in order to enhance the gain value of the antenna directivity, a metal reflecting plate 40 (for example, an aluminum plate or an iron plate, etc.) may be arranged in parallel on the bipolar I-side and spaced a predetermined distance to reflect the radiation mu direction. To increase the directivity of the antenna. f Refer to "Figure 2", which is the switching circuit diagram of this creation, including: the first diode switch D 1, the second diode switch D 2, the inductor Li, the first capacitor Cl, and the second capacitor C2 , A third capacitor ㈡, a resistor R1, a vertical 线 line unit 20a, a horizontally polarized antenna unit 20b, and a section of 1/4 λ micro ▼ line 15. First, the resistor R1 and the first capacitor C1 are connected in parallel to the first node 1 and the second capacitor g to reduce noise and limit the rated current. The first diode = area 1 to the second node 2, the first The N pole followed by a diode is connected to Γ Γ point 3 to block the direct current, and the second capacitor C2 is connected to the vertically polarized antenna unit 20a, and the other end of the inductor u is roundj. Forms a current loop when used with a vertically polarized antenna. One quarter of a quarter (also: wavelength) of the microstrip line 15 is described by J2 at one end, and the other-end is coupled to the fourth node 4, $ to match the second-rate circuit of the line 1 and the third to ground. When the horizontally polarized antenna is electrically connected to the fourth node 4 to prevent direct

Page 8 M260009 IV. Creative Instructions (5) Galvanic ’its other end is connected to the horizontally polarized antenna unit 20k. Next, the operation of the 'switching circuit 1 0' is explained as follows: When the input voltage number is a high level (for example, a DC 3 volt voltage), the first diode switch D 1 and the second diode switch D 2 are caused by It is turned on (ON), and the inductor L1 is used to provide a path for switching the signal to the ground. For the radio frequency signal, 'from a quarter of a microstrip line 15 to the second diode switch 1) 2 and then the path to the ground It is regarded as an open circuit, so the radio frequency signal cannot pass, and the path of the second capacitor C2 to the vertically polarized antenna unit 20a is generated to generate a radiation signal in the vertical polarization direction. When the input voltage signal is at a low level (for example, DC 0 volt voltage), the first diode switch D1 and the second diode switch D2 are not conductive (0FF), so the RF signal cannot pass through the first diode. The vertically polarized antenna path formed by the switch D 1 can only pass through the 1/4 microstrip line 15 to the third capacitor C 3 and then reach the horizontally polarized antenna unit 2 0 b to generate horizontally polarized radiation. Signal. The circuit components are soldered to a predetermined position on the substrate 30 by Surface Mounted Technology (SMT), and the input signal line includes a switching signal and a wireless signal, and a high-level voltage signal is used. To switch two antenna circuits with different polarization directions to radiate radio frequency signals in the horizontal or vertical direction. In addition, 'this creation also puts forward the actual test radiation field diagrams for illustration, using different frequencies of 2 · 4GHz, 2 · 45GHz, and 2 · 5GHz for different tests. ❿ Please refer to "Figure 3 A" for the high switching voltage In the case of potential position, the radiation field pattern of the η-plane, the "Figure 3B" is when the switching voltage is high, ν-

Page 9 M260009 IV. Creative Instructions (6) Plane radiation field pattern; “Figure 3 C” is the H-plane radiation field pattern when the switching voltage is at a low level, and “3D graph” is Radiation field pattern of the V-plane when the switching voltage is low. With such a dual-polarized dipole antenna, the circuit design at the communication system side can be simplified to achieve the purpose of simplifying the design and improving the overall efficiency. Although the above-mentioned preferred embodiments are disclosed as above, it is not intended to limit the creation; without departing from the spirit and scope of the creation, changes and retouching are within the scope of the patent protection of the creation; For the protection scope defined by the creation, please refer to the attached patent application scope.

M260009 on page 10 Brief description of the diagram. The first diagram is the schematic diagram of the appearance of the creation; the second diagram is the switching circuit diagram of the creation; the third A is the switching voltage of the creation. Η-plane radiation field pattern; Figure 3B is the radiation field pattern of V-plane when the switching voltage is high level; When the switching voltage is at a low level, the radiation field pattern of the 平面 -plane; and the 3D figure is the radiation field pattern at the V-plane when the switching voltage is low level mentioned in this creation. [Symbol description] 1 First node 10 Switching circuit 15 1/4 λ Microstrip line 100 Electronic device 2 Second node 20 Dual polarization antenna 2 0a Vertically polarized antenna unit 20b Horizontally polarized antenna unit 3 Third node 30 Base plate 4 Fourth node 40 Reflective plate 50 Metal wire

Page 11 M260009 Schematic description ci First capacitor C2 Second capacitor C3 Third capacitor D1 First diode switch D2 Second diode switch L1 Inductance R1 Resistance (ill page 12

Claims (1)

M260009 5. Scope of patent application 1 · A dual-polarized dipole antenna is a printed circuit antenna. The antenna includes: a substrate with a first node for inputting a signal, the signal includes a radio frequency signal and a Switching signals; a dual-polarized antenna configured on the substrate, having more than one vertically polarized antenna and more than one horizontally polarized antenna to radiate the radio frequency signal; and a switching circuit configured on the substrate, according to The switching signal switches the radiation path of the radio frequency signal to the vertically polarized antenna or the horizontally polarized antenna, whereby the radio frequency signal is radiated by the vertically polarized antenna or the horizontally polarized antenna. _ 2. The dual-polarized dipole antenna described in item 1 of the scope of patent application, further comprising a reflecting plate for reflecting the radiation signal in a specific direction to increase the directivity of the antenna. 3. The dual-polarized dipole antenna according to item 2 of the scope of patent application, wherein the reflecting plate is arranged in parallel on one side of the antenna. 4. The dual-polarized dipole antenna as described in item 1 of the scope of the patent application, wherein the material of the substrate is made of 1 × 〇6 ^ 1 × 04 3 5 06. 5. The dual-polarized dipole antenna as described in item 1 of the scope of patent application, wherein when the switching signal is at a high level, the radio frequency signal passes through the one or more vertically polarized antennas to generate the vertical polarization direction. Radiation signal. 6 · The dual-polarization dipole antenna as described in item 1 of the scope of patent application, wherein when the switching signal is at a high level, the RF signal passes through the one or more horizontally polarized antennas to generate the horizontally polarized direction Radiation signal. Page 13 M260009 V. Application for patent scope 7 · The dual-polarized dipole antenna described in item 1 of the patent application scope, wherein the switching circuit further includes: a resistor and a first capacitor connected in parallel with the first node and A second node for filtering noise and limiting the rated current; a first diode switch, the P pole of the first diode is coupled to the second node, and the N pole thereof is coupled to a first node; Three nodes; one end of an inductor and a second capacitor is connected to the third node in common, the other end of the inductor is grounded, and the other end of the second capacitor is coupled to the one or more vertically polarized antennas so as to be used in A current loop when the antenna is vertically polarized; a 1/4 long microstrip line, one end of the 1/4 person microstrip line is coupled to the third node, and the other end is coupled to a fourth node for Match the impedance required by the line; a second diode switch, the P pole of the second diode switch is coupled to the fourth node, and the N pole is grounded to form the current when the horizontally polarized antenna is used A loop; and one end of a third capacitor is coupled to the fourth node, and One end is coupled to one or more of the horizontally polarized antenna, to block the direct current 0 Page 14