CN1979947B

CN1979947B - Single-pole antenna

Info

Publication number: CN1979947B
Application number: CN2005101227920A
Authority: CN
Inventors: 柯云龙; 戴隆盛; 黄耀先
Original assignee: Foxconn Kunshan Computer Connector Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Foxconn Kunshan Computer Connector Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2005-11-30
Filing date: 2005-11-30
Publication date: 2011-11-16
Anticipated expiration: 2025-11-30
Also published as: CN1979947A

Abstract

The unipole antenna includes insulated base plate, radiation part, grounding part, and feed line. Being in inverse trapezoid, the radiation part is attached to the insulated base plate. There is trapezoidal notch on winder end of the insulated base plate, and there is 'U' shaped slot on narrower end. Being as a rectangular metal plate, the grounding part includes opening in middle, and rectangular channels on two sides of the opening. Inner conductor and outer conductor are setup on feed line. Passing through the opening on the grounding part, the inner conductor is connected to the radiation part electrically, and outer conductor is connected to sheet metal of the grounding part electrically. The disclosed antenna can increase bandwidth effectively, and possesses preferred impedance matching.

Description

Unipole antenna

[technical field]

The present invention is a kind of antenna, relates in particular to a kind of unipole antenna that is used on the electronic installation.

[background technology]

For the antenna on being applied to Digital Television, its acceptance/transmit and reliability are very important, and require antenna volume the smaller the better.Compared to prior art, can be with reference to No. the 239677th, TaiWan, China patent announcement, it discloses a kind of wideband unipole antenna, comprises ground plane, roughly is positioned at the radiation sheet metal and the feed-in coaxial transmission line at the top edges place of this ground plane.Wherein ground plane shape is roughly a rectangle, has a top edges and a lower edge with respect to this top edges, and have an earth point and a short dot near the top edges of this ground plane.Radiation sheet metal comprises the first sub-sheet metal, the second sub-sheet metal and a short circuit metal arm.The feed-in coaxial transmission line comprises center conductor and outer earthing conductor.But this antenna volume is bigger.

Existing multifrequency antenna 1 ' as shown in Figure 1 in addition, it comprises insulated substrate 10 ', first grounding parts 40 ', in low frequency portion 20 ' that forms on the insulated substrate surface and radio-frequency head 30 ', be located at resonant cavity 60 ' and feeder line 70 ' between first grounding parts 40 ' and the radio-frequency head 30 '.Wherein, described feeder line 70 ' is made up of inner sandwich layer 71 ' and braid 72 ', and inner sandwich layer 71 ' and braid 72 ' are welded in the radio-frequency head 30 ' and first grounding parts 40 ' respectively.Yet this antenna low frequency portion is owing to be a complete prismatoid, and its impedance matching is short of to some extent.Therefore, be necessary to provide a kind of modified model antenna to overcome the defective of prior art.

[summary of the invention]

The object of the present invention is to provide the unipole antenna that a kind of volume is less and frequency range is enough big.

For achieving the above object, the present invention adopts following technical scheme: a kind of antenna comprises insulated substrate, Department of Radiation, grounding parts and feeder line.Wherein Department of Radiation depends on described insulated substrate surface, is the lengthwise trapezoidal shape, and an end of broad hollows out mid portion; Grounding parts and described insulated substrate are at angle; Feeder line has the inner wire and the outer conductor that is connected grounding parts that connects Department of Radiation.

Compared with prior art, the present invention has following beneficial effect: volume is littler, and utilizes the shape and structure of antenna effectively to increase frequency range, and preferable impedance matching is arranged, and more adapts to the requirement that the modern electronic product volume is more and more littler and performance requirement is more and more higher.

[description of drawings]

Fig. 1 is the stereogram of prior art multifrequency antenna.

Fig. 2 is the stereogram of unipole antenna of the present invention.

Fig. 3 is the stereogram of another angle of unipole antenna of the present invention.

Fig. 4 is the stereogram of an angle again of unipole antenna of the present invention.

Fig. 5 is for irising out the partial enlarged drawing at position among Fig. 2.

Fig. 6 is for irising out the partial enlarged drawing at position among Fig. 3.

[embodiment]

Please refer to Fig. 2 to Fig. 6, unipole antenna 1 of the present invention comprises insulated substrate 10, Department of Radiation 20, grounding parts 30 and feeder line 40.Wherein Department of Radiation 20 and grounding parts 30 are made of sheet metal, and Department of Radiation 20 is formed at the surface of insulated substrate 10.

It is trapezoidal that Department of Radiation 20 is lengthwise, and a part in the middle of its broad one end hollows out forms less trapezoidal fluting 21, and this fluting 21 is divided into first radiation arm 201 and second radiation arm 202 with Department of Radiation 20.Department of Radiation 20 narrower ends have one " U " shape slit 22, and it makes Department of Radiation 20 narrower ends form the first rectangular arm 24a, the second rectangular arm 24b and protuberance 23.Department of Radiation 20 sticks on the insulated substrate 10.

Grounding parts 30 is rectangular, and it is positioned at the narrower end of Department of Radiation, and with described insulated substrate at angle.One opening 32 is arranged in the middle of the grounding parts.

Rectangular duct

31a, 31b that opening 32 both sides offer symmetric arrays respectively and do not communicate with opening 32.In the present embodiment, grounding parts is substantially perpendicular to described insulated substrate.

Feeder line 40 is a coaxial feeder, comprises inner wire 41, outer conductor 43, in order to inner insulating layer 42 that coats inner wire 41 and the external insulation layer 44 that coats outer conductor 43.Inner insulating layer 42 ends are stripped from and are exposed one section inner wire 41.Outer conductor 43 electrically connects with grounding parts 30, and insulating barrier 42 coating inner wires 41 pass opening 32 and extend upward, and inner wire 41 is electrically connected with the protuberance 23 of antenna 1 Department of Radiation 20.

Insulated substrate 10 two bottom sides have projection 11a, 11b.During installation projection 11a, the 11b of insulated substrate 10 passed conduit 31a, the 31b of grounding parts 30 respectively, thereby be fixed on the grounding parts 30.

Experiment shows that unipole antenna 1 of the present invention has enough frequency ranges, and under the less situation of volume, the Department of Radiation of antenna is designed to trapezium structure wide at the top and narrow at the bottom has increased its frequency range effectively.

In addition, broad one end of Department of Radiation 20 has fluting 21, makes to pass through the size adjustment impedance matching of fluting, thereby makes the impedance matching of antenna reach requirement.

Claims

1. unipole antenna, comprise: an insulated substrate, Department of Radiation, grounding parts and feeder line, wherein Department of Radiation depends on described insulated substrate surface, it is characterized in that: described Department of Radiation is the lengthwise trapezoidal shape, and an end of broad hollows out mid portion and forms trapezoidal fluting, and described trapezoidal fluting is divided into from a narrower end Department of Radiation strip first Department of Radiation and second Department of Radiation of lengthwise to broad one end; Grounding parts is positioned at the narrower end of Department of Radiation, and vertical with described insulated substrate; Feeder line has the inner wire and the outer conductor that is connected grounding parts that connects Department of Radiation.

2. unipole antenna as claimed in claim 1 is characterized in that: described insulated substrate bottom has in order to insulated substrate is retained on two projections on the grounding parts.

3. unipole antenna as claimed in claim 2 is characterized in that: described grounding parts is a rectangular metal plate, and an opening that is positioned at the center is arranged.

4. unipole antenna as claimed in claim 3 is characterized in that: described grounding parts has two to lay respectively at described opening both sides and do not link to each other with opening in order to the rectangular duct of the projection of accommodating insulated substrate.

5. unipole antenna as claimed in claim 1 is characterized in that: the narrower end of wherein said Department of Radiation comprises a protuberance, is positioned at first rectangular arm and second rectangular arm of protuberance both sides, forms " U " shape groove between the three.

6. unipole antenna as claimed in claim 5 is characterized in that: the inner wire of described feeder line passes the opening of described grounding parts and the protuberance of described Department of Radiation electrically connects, and outer conductor and described grounding parts electrically connect.