CN2519540Y

CN2519540Y - Bifrequency antenna

Info

Publication number: CN2519540Y
Application number: CN01276274U
Authority: CN
Inventors: 郑永昌
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: 2001-12-06
Filing date: 2001-12-06
Publication date: 2002-10-30
Anticipated expiration: 2011-12-06

Abstract

A dual-frequency antenna consists of a substrate, two radiation plates, two conductive columns, two feeder lines and a grounding piece, wherein, the grounding piece is arranged on the upper surface of the substrate; the radiation plates are supported by the conductive columns and separately arranged on a certain height above the upper surface of the substrate; the two conductive columns are separately connected with the two radiation plates and the grounding piece by the electric properties; the inner core wires of the two feeder lines and a opaque layer are connected with the two radiation plates and the grounding piece by the electric properties. The dual-frequency antenna can work in two frequencies at the same time, which has a simple structure and a low cost.

Description

Dual-band antenna

[technical field]

The utility model relates to a kind of dual-band antenna, refers in particular to a kind of dual-band antenna that is used for portable communication apparatus.

[background technology]

(antenna that is installed on the portable communication apparatus (for example notebook computer) is able to a large amount of uses for Wireless Local Access Net, the WLAN) extensive use in modern mobile office environment along with WLAN (wireless local area network).These antenna usually is applied among the WLAN of IEEE 802.11a (5.2GHz) and IEEE802.11b (2.4GHz), (Personal Computer PC) carries out transfer of data and reception and reaches the function of whole WLAN between the wireless network card on desktop computer.As previously mentioned, often have IEEE 802.11a (5.2GHz) and two working frequency range of IEEE802.11b (2.4GHz) among the WLAN simultaneously, therefore original single-band antenna does not just apply and uses.

In polytype dual-band antenna, microstrip antenna is highly lower because of it, be easy to built-in and preferable gain gains great popularity.United States Patent (USP) the 5th, disclosed a kind of double-frequency micro-strip antenna 561, No. 435, as shown in Figure 1, this antenna comprises first, second and third substrate 4 ', 6 ', 16 ' that piles up setting, and wherein the dielectric constant of second substrate 6 ' is far longer than first and third substrate 4 ', 16 ' dielectric constant.The lower surface of first substrate 4 ' of lower floor is provided with ground strip 2 ', the 3rd substrate 16 ' upper surface on upper strata is provided with radiation fin 18 ', and the upper surface of second substrate 6 ' in middle level and the 3rd substrate 16 ' intersection are provided with the conducting strip 12 ' and 14 ' of coupling low-frequency range impedance.The internal core wire of feeder line (not label) is welded to radiation fin 18 ', and bond pad locations is high band impedance matching place, and shielding layer is welded to ground strip 2 '.This antenna is provided with the substrate with differing dielectric constant and makes radiation fin 18 ' can be operated in two different frequency ranges by piling up.

Yet this antenna can only be operated in a frequency range at synchronization, simultaneously transceive data on two frequency ranges.In addition, this antenna need pile up multilager base plate is set, thereby cost is higher, and this Antenna Impedance Matching needs by the feed bond pad locations being set and in the middle of the substrate that stacks conducting strip 12 ' being set accurately and 14 ' two kinds of means are finished, and also makes comparatively complexity of its processing procedure.

[author content]

The purpose of this utility model is to provide a kind of dual-band antenna, and this antenna can be operated in two frequency ranges simultaneously, and simple in structure cheap.

The purpose of this utility model is achieved through the following technical solutions: the utility model dual-band antenna comprises substrate, two radiation fins, two conductive poles, two feeder lines and ground strip.Wherein ground strip is arranged on base lower surface, radiation fin is supported to separate by conductive pole and is arranged on certain altitude place, upper surface of base plate top, two conductive poles electrically connect two radiation fins and ground strip respectively, and the internal core wire of two feeder lines and shielding layer electrically connect two radiation fins and ground strip respectively.

Compared to prior art, the radiation fin of the utility model dual-band antenna separate to be provided with and to be supported on substrate certain altitude place, top by conductive pole respectively and to electrically connect with ground strip, can be operated in two frequency ranges simultaneously by the feeder line feed of correspondence.In addition, the impedance matching of the utility model by selecting the feed bond pad locations can reach two frequency ranges.This Double-frequency antenna structure is simple and cheap.

[description of drawings]

Fig. 1 is the representative diagram of prior art.

Fig. 2 is a three-dimensional combination schematic diagram of the present utility model.

Fig. 3 is a upward view of the present utility model.

Fig. 4 is a front view of the present utility model.

Fig. 5 is a left view of the present utility model.

[embodiment]

Please refer to Fig. 2 to shown in Figure 5, the utility model dual-band antenna 1 comprises substrate 11, ground strip 10, first radiation fin 21, second radiation fin 22, first conductive pole 23, second conductive pole 24, first feeder line 25 and second feeder line 26.

In the present embodiment, substrate 11 is FR4 PCB that roughly assume diamond in shape, and has upper surface 110 and lower surface 111.Ground strip 10 adopts modes such as etching or paster to be located on substrate 11 lower surfaces 111.In the present embodiment, ground strip 10 materials are Copper Foil and are covered with the green lacquer of one deck, for welding needs the also naked some spray tin parts (shown in Fig. 3 oblique line) that are provided with.

First radiation fin 21 and second radiation fin 22 are separately positioned on certain altitude place, substrate 11 upper surfaces, 110 top, the wavelength ratio of respectively corresponding two frequencies of their length (2.4GHz and 5.2GHz).First conductive pole 23 and second conductive pole 24 pass substrate 11 respectively and support first radiation fin 21 and second radiation fins 22, and first and

second radiation fin

21,22 and ground strip 10 is welded at first conductive pole 23 and second conductive pole, 24 two ends respectively.

First feeder line 25 comprises first internal core wire 250 and first shielding layer 251 of electrical isolation.Second feeder line 26 comprises second internal core wire 260 and second shielding layer 261 of electrical isolation.First internal core wire 250 and second internal core wire 260 pass substrate 11 and are welded to respectively on first radiation fin 21 and second radiation fin 22, and first shielding layer 251 and second shielding layer 261 are welded to respectively on the spray tin part of ground strip 10 correspondences.Adjust first internal core wire 250 and second internal core wire 260 bond pad locations on first radiation fin 21 and second radiation fin 22 and can realize of the impedance matching of this dual-band antenna 1, and then realize that this dual-band antenna all reaches best signal transmitting and receiving effect at two working frequency range two frequency ranges.

Certainly, in actual applications, the utility model the foregoing description is changed slightly, can realize the multifrequency function by corresponding radiation fin, conductive pole and the feeder line of many groups is set.

Claims

1. dual-band antenna, comprise substrate, ground strip, radiation fin and feeder line, wherein ground strip is located at base lower surface, radiation fin is located at upper surface of base plate certain altitude place, the internal core wire of feeder line and shielding layer electrically connect radiation fin and ground strip respectively, it is characterized in that: this dual-band antenna also comprises the conductive pole that supports radiation fin and itself and ground strip are electrically connected, and described radiation fin, conductive pole and feeder line are divided into correspondence at least two groups and isolate setting.

2. dual-band antenna according to claim 1 is characterized in that: the wavelength ratio of respectively corresponding at least two frequencies of the length of described radiation fin.

3. dual-band antenna according to claim 2 is characterized in that: described two frequencies are respectively 2.4GHz and 5.2GHz.

4. dual-band antenna according to claim 2 is characterized in that: the internal core wire of described feeder line is welded to respectively on the corresponding radiation fin, and bond pad locations is respectively the position of this dual-band antenna in described at least two frequency impedance coupling.

5. dual-band antenna according to claim 4 is characterized in that: described radiation fin is parallel with substrate, and described conductive pole is vertical with substrate with radiation fin.