TW503600B - Printed dipole antenna - Google Patents

Abstract

A printed dipole antenna comprises a printed antenna circuit board, two dipole antennas, and two feeding devices, wherein the printed antenna circuit board comprises a first and a second surface in opposite direction. The two dipole antennas comprises tow dipole sub-units, and the two dipole sub-units are configured on the first surface and the second surface of the printed antenna circuit board in opposite direction. The two dipole antennas are vertically configured in the space. The two feeding devices can feed the two dipole antennas, respectively. With the difference between the switching mechanism and antenna direction of the dual feeding, it can make two of the three radiation planes of X-Y, X-Z, Y-Z in the space have better transmitting and receiving effects.

Description

V. Description of the invention (l) [Field of the invention] The present invention is related to _ placed on an electronic device to realize i W 4 \\\ [Background of the invention]

Dipole antennas can be effectively used in various fields because of their effectiveness. A single dipole antenna is currently used. However, the single X-Y, X-Z, Y-Z and other three radiation planes have the best radiation effect, and the wireless transmission and reception effect is not good. Furthermore, the space is large, the structure is more complex, and the trend is short and small. Transmitting and receiving electromagnetic waves, so in many electronic devices, a relatively large number of dipole antennas on the surface in 3D space can often only make one of the antennas ignore the radiation of the other two planes, resulting in the conventional use The power feeding device generally does not comply with the current light, thin, and related conventional technologies of electronic devices, as shown in US Patent No. 4,605,931. The conventional antenna is a microstrip antenna using a parent fork feeder, including a complex number For the first feeder line and the second feeder line, the first feeder line and the second feeder line are placed on the same plane, and each pair of the crossed feeder lines is provided with the first, second, third, and fourth ports, of which the first port and the second port are used for The first signal is transmitted between each other, and the third and fourth ports are used to transmit the second signal. With this method, the signals have little interference with each other and can effectively eliminate feedback, but the structure is more complicated.

In addition, as disclosed in the Republic of China Patent Application No. 87 1 1 2281, a circularly circularly polarized microstrip antenna design with a tunable short metal patch is provided on the edge of the circular metal patch of the microstrip antenna. Adjustable short metal patch, and the feeding position is at a 45 ° crossing line with this short metal patch. The antenna can be fed by coaxial line or by microstrip line. Round metal

Page 5 503600 V. Description of the invention (2) The patch is made on a grounded substrate. It is proved that the x-y and z-planes have better receivability ... ::: month: the antenna can not be turned into s, and it accounts for Xiao. ~ More troublesome is to provide an eyebrow tip that has a good receiving effect on any two sides of the reed. | Receiving antennas with strong and weak mutual switching is imminent [Objective of the invention] The purpose of the present invention is to provide a switching mechanism using dual-polarized radiation to obtain a relatively high interior, with a dipole antenna. ... printed type with different receiving effect of soil Another object of the present invention is to provide a printed dipole antenna. This effective reduction > Antenna size manufacturing Another purpose of the Ming is to provide a system of printed dipole antennas [Inventive Features] Including printing: one of t: df is to provide a printed dipole antenna A dipole antenna is composed of two dipole units, which are located on two opposite sides of the printed antenna circuit board: Ma = Zi Zao 7 ^ minutes The space is vertically distributed, and all are distributed by a town electricity event =: Switching mechanism between double-feed devices and -dipole ^ ς feed, precisely because of the difference in the orientation of the X-Υ, X 7 ν 7-Μ 1 antennas, making the space

Γ χ ~ ζ and γ_ζ are two in one of the two radiation planes. ^ A A In addition, the dipole unit of the printed dipole antenna of the present invention uses a T-shaped surface. Page 6) 03600 V. Description of the invention (3 ) Path, which can save space and manufacturing costs, and reduce antenna size. [Preferred embodiment] As shown in the first figure and the first figure, the printed dipole antenna 1 of the present invention includes a first dipole antenna 2, a second dipole antenna 3, a printed antenna circuit board 4, and a feeding device. 8,8 ,. The printed antenna circuit board 4 has a first surface and a second surface 42 opposite to each other. The first dipole antenna 2 is composed of a first dipole unit 21 and a second dipole unit 22, and the second dipole antenna 3 is constituted by a third The dipole f element 31 and the fourth dipole unit 4 are composed. The first and third dipole units 21 and 31 are arranged on the first surface 41 of the printed circuit board 4 perpendicularly to each other, and the first and fourth dipole units 22 and 32 are arranged on the brush circuit board 4 perpendicularly to each other. On the second surface 42, the first and second dipole units are arranged at two opposite sides of the antenna printed circuit board 4, and the third and fourth dipole units 31 and 32 are the same, so the two dipoles are the same. The antennas 2 and 3 are vertically spaced. The dipole units 21, 22, 31, and 32 are all τ-type structures, and have 1 space. Feed points 5, 5, 6, 6, 6 are distributed at the vertical edges of the T-shaped structure, that is, approximately at the center of the printed circuit board 4, where the feed | set 8 (f coaxial cable in this embodiment) It is connected to the feeding points 5, 5 and another feeding point 8 (coaxial cable in this embodiment) and the feeding point 66 are connected, so that the two feeding devices 8, 8 are staggered. . The aforementioned power feeding devices 8 and 8 feed the two dipole antennas 2 and 3 respectively, and the external circuit can switch the power feeding between the power feeding devices 8, 8 such that χ — γ, χ−z ^ : Two of the three radiation planes have better radiation effects. The aforementioned points 5, 5, 6, 6 'can be moved from the center of the printed circuit board 4 to the side of the circuit board at the same time, even if the feeding points 5, 5, 6, 6, 6 are set on the dipole list

Page 7 V. Description of the invention (4): 21, 22, 31, 32 The influence of the routing method on the adjacent side of the antenna on the characteristics of the antenna. In the embodiment disclosed in order to reduce the feeding, the second dipole and the second dipole, the length of the long side of the τ-type patch constituting the two dipoles of the first dipole antenna 2 and the early dipoles 21 and 22 is L4. Evening and interest ★ The feed point is confused τ R · De λ, μ /, the length of the two short sides of the vertical two sides is L5, and the T-shaped patch of the two dipole units connected to the line 3 is connected to the feed Electric point L2 L3 .: The length of the two is U 'and the length of the short side is 6 respectively, the distance between the feed point 5, < is 1, the distance between the feed point distance H Λ is G2' The distance between the electric point 5 and the feed point 6 is fG9 ', and the distance between the feed point 6 and the feed point 5 is G4. Among them, L1 = L4, L2 = L3 = L5 = L6, and G1 = G2 = G3 = G4 Please refer to the third and fourth figures at the same time, where the third figure is the radiation pattern of the first dipole antenna 2 in the XZ plane 'The fourth picture is the #S shot of the second dipole antenna 3 in the γ_ζ plane' From the third and fourth diagrams, it can be seen that the T-shaped antenna 1/2 peak gain can be reached in the χ_ζ and γ_ζ planes. _1〇 / _〇5 (dBi), which can be effective on the main plane respectively. Please refer to the fifth figure, which is a voltage standing wave ratio of the present invention.

(The VSWR ^ test data diagram shows that the voltage standing wave ratio (VSWR) of the first and second dipole antennas 2 and 3 can reach VSWR &lt; 2.0 in the frequency bands 2 · 4 ~ 2 · 5GHZ. The design specifications are required. ★ Also, the VSWR is the ratio of the energy of the antenna fed at the frequency to judge the characteristics of the antenna and this frequency band. Generally speaking, a voltage standing wave ratio greater than 1 is reasonable. Industry standards usually reflect the frequency of SWR <2 · 〇 (that is, less than 10% of the energy is reflected back, and the rest is radiated through the antenna).

Page 8 503600

: The frequency range of ΪΠίΓί, so the antenna designer opened the line, under the required frequency band (such as Bluetooth system, | network LM, 2.4 ~ "GHZ) must reach SWR &lt;2; Printed dipole antenna, through the difference of the orientation of a double-fed dipole antenna, to make the two of the χ-γ, χ_ζ, γ ζ radiation plane have better radiation effect, the antenna design meets the design specifications ^ In summary It is stated that the present invention has already met the requirements of the invention patent and has enhanced functions, and it can also be applied to the transmission / reception of notebook computers, Bluet00th ', --- Guangguang 1 · 56 · Z ··· μ line communication modules. Antenna. = Everyone who knows this &amp; art citing the spirit of the present invention to make all kinds of cross-cuts should be covered by the following patent application 503600

[Schematic description] The dipole antenna is a plan view of the printed dipole antenna of the present invention. The second diagram is a three-dimensional view of the printed dipole antenna of the present invention. The third diagram is one of the printed dipole antennas of the present invention. Radiation effect map of X-Z plane. A dipole antenna is flat at γ-z. The fourth figure is another radiation effect diagram of the printed dipole antenna of the present invention.

The voltage standing wave ratio test chart 05 is the symbol description of the printed dipole antenna of the present invention] Printed dipole antenna 1 Second dipole antenna 3 First surface 41 First dipole unit 21 Third dipole unit 31 Feed points 5, 5, feed devices 8, 8, first dipole antenna 2 printed antenna circuit board 4 brother-surface 4: 2 brother-dipole unit 22 fourth dipole unit 32 6 &gt; 6,

Claims (1)

刈 3600 6. Scope of patent application1. A printed antenna surface; A type dipole antenna includes: a circuit board having a first surface opposite to the second surface element and a second dipole element; One yuan and the second sub-unit 2 · If applying for a younger one-dipole triple-dipole and the first even-fourth dipole 3 · as applying for a college first and 4 · as applying for a college first 5 · as applying for a college A dipole with two dipoles and a first dipole antenna on both sides, having a first dipole unit and a second dipole antenna, and a third dipole unit and a fourth dipole, respectively. The element range of the polar range antenna is the polar range of the subdivision range. The tm early range of the range and the second range range antenna of the antenna are mutually perpendicular to the two dipole antenna feeds. The neutral line and the second dipole antenna are the same. A dipole mono unit and a third dipole unit are on opposite sides of the fourth dipole printed antenna circuit board. The printed dipole antenna according to item 1, wherein the first dipole unit and the second dipole antenna are disposed on the first surface of the printed antenna circuit board, the second dipole unit and the second dipole are two wires. It is disposed on the second surface of the printed antenna circuit board. The printed dipole antennas described in item 1 or 2 have their polar antennas distributed perpendicularly to each other. The printed dipole antenna according to item 3, wherein the dipole unit of the dipole antenna is a τ-type junction ^. The printed dipole antenna according to item 4, wherein the first dipole unit and the second dipole antenna are adjacent to each other on the same surface of the printed antenna circuit board Page 11 503600 6. Application for patent scope 6. ^ The printed dipole antenna described in item 5 of the scope of patent application, the second dipole unit of the first dipole antenna and the second dipole antenna, the middle ^ four dipole The pole units are located on the same surface of the printed antenna circuit board: the two sides of the brother are perpendicular to each other. Adjacent 7 • The printed dipole antenna as described in item 6 of the scope of the patent application, the dipole unit is provided with a feeding point, and the feeding device is thus fed with power. Beam point 8 • The printed dipole antenna described in item 7 of the scope of patent application, the feed point is at the end of the T-shaped structure of the dipole unit toward the center of the printed antenna ^ plate. Road 9 · The printed dipole antenna as described in item 7 of the patent application scope, wherein the feeding point is located on the side of the printed antenna circuit board. 10 · The printed dipole antenna as described in item 8 of the scope of patent application, wherein when the two feeding devices are electrically connected to the feeding points of the first dipole antenna and the second dipole antenna, respectively, the second feeding The electrical devices are arranged staggered '. 1 1 · The printed dipole antenna as described in item 10 of the scope of patent application, wherein the feeding device is a coaxial line overview. 1 2 · A method for manufacturing a printed dipole antenna, the steps include: (a) providing a printed antenna circuit board; (b) providing a plurality of dipole antennas, each dipole antenna including two dipole units, respectively (C) arranging the plurality of dipole antennas on opposite surfaces of the printed antenna circuit board, so that the two dipole units of each dipole antenna are respectively located on the opposite surfaces of the printed circuit board; Page 12 503600 6. The scope of patent application (d) provides the corresponding number of feeding devices corresponding to the dipole antenna; e is about to die, and the feeding devices are connected to the corresponding dipole antennas respectively. The external circuit realizes band switching. Electricity 1 3 · The method for manufacturing a printed dipole antenna as described in Item 12 of the scope of patent application, wherein the plurality of dipole antennas are arranged in a manner perpendicular to each other. 14 · The method for manufacturing a printed dipole antenna as described in item 13 of the scope of patent application, wherein the two dipole units of the dipole antenna are respectively arranged on opposite sides of the printed antenna circuit board. Page 13