CN2520002Y

CN2520002Y - Double-frequency slotted antenna

Info

Publication number: CN2520002Y
Application number: CN 01276001
Authority: CN
Inventors: 孙佩伦; 戴新国; 黄建勋
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: 2001-11-13
Filing date: 2001-11-13
Publication date: 2002-11-06
Anticipated expiration: 2011-11-13

Abstract

The utility model discloses a dual-frequency slotting antenna, which includes a metal surface, two slots arranged on the metal surface and a coaxial cable which has an electrical connection with the metal surface. The two slots have different specific sizes, and an inner core line and a braid ply of the coaxial cable have an electrical connection with the relative outer metal surface. By using one coaxial cable as the shared feed cable of the two slots, and the radio frequency signal is fed in single point, and thus the manufacture cost and the mounting space of the antenna can be reduced.

Description

Double-frequency slotted antenna

[technical field]

The utility model relates to a kind of double-frequency slotted antenna, refers in particular to a kind of double-frequency slotted antenna with single-point feed-in structure.

[background technology]

In the double-frequency wireless communications applications, existing dual-band antenna is applicable to the single-band antenna of different frequency and inserts radio-frequency module respectively and realize by design respectively mostly, similar design sees also shown in Figure 12, this double-frequency slotted antenna comprises external recessing 11 and internal recessing 12, wherein external recessing 11 and internal recessing 12 pass through first coaxial cable 30 and second coaxial cable 50 respectively as feeder line feed-in radiofrequency signal, and external recessing 11 and internal recessing 12 can be applicable to the different operating frequency range respectively.

But, because this design need adopt two feeder lines to match with two radio frequency modules respectively, cause the antenna cost of manufacture to increase, and be unfavorable for reducing the installing space of antenna.

[author content]

The utility model purpose is to provide a kind of double-frequency slotted antenna that reduces antenna cost of manufacture and installing space.

The coaxial cable that the utility model double-frequency slotted antenna comprises a metal covering, is located at the fluting of two on the metal covering and electrically connects with metal covering, wherein two flutings have different specific dimensions, and the internal core wire of coaxial cable and braid are electrically connected to respectively on the metal covering in this relative outside of two flutings.

Compared to prior art, the utility model double-frequency slotted antenna only uses the feeder lines of a coaxial cable as two flutings, single-point feed-in radiofrequency signal, thus reduced the cost of manufacture and the installing space of antenna.

[description of drawings]

Fig. 1 is a stereogram of the present utility model.

Fig. 2 is the vertical view of double-frequency slotted antenna shown in Figure 1, has wherein indicated relative positions and size with the form of coordinate.

Fig. 3 is a double-frequency slotted antenna shown in Figure 1 when working in than low-frequency range, the curve chart that voltage standing wave ratio changes with operating frequency.

Fig. 4 is a double-frequency slotted antenna shown in Figure 1 when working in higher frequency band, the curve chart that voltage standing wave ratio changes with operating frequency.

Fig. 5 is a double-frequency slotted antenna shown in Figure 1 electromagnetic wave horizontal polarization field pattern when working in lower frequency.

Fig. 6 is a double-frequency slotted antenna shown in Figure 1 electromagnetic wave perpendicular polarization field pattern when working in lower frequency.

Fig. 7 is a double-frequency slotted antenna shown in Figure 1 electromagnetic wave horizontal polarization field pattern when working in upper frequency.

Fig. 8 is a double-frequency slotted antenna shown in Figure 1 electromagnetic wave perpendicular polarization field pattern when working in upper frequency.

Fig. 9 is the stereogram of second kind of execution mode of the present utility model.

Figure 10 is the stereogram of the third execution mode of the present utility model.

Figure 11 is the stereogram of the 4th kind of execution mode of the present utility model.

Figure 12 is the assembling schematic diagram of prior art.

[embodiment]

See also shown in Figure 1ly, the utility model double-frequency slotted antenna 1 comprises metal covering 10, first fluting, 11, second fluting 12 and the coaxial cable 20.Wherein, metal covering 10 is to be made by sheet metal, and 12 longitudinallies along metal covering 10 of first fluting, 11 and second fluting are offered thereon, and have different specific dimensions to adapt to different operating frequencies.Coaxial cable 20 comprises internal core wire 21 and braid 22, wherein internal core wire 21 is welded on the outside metal covering of first fluting 11,22 of braids are welded on the outside metal covering of second fluting 12, make coaxial cable 20 become first fluting, 11 and second fluting, 12 shared feeder cable, single-point feed-in radiofrequency signal.

The relative position of the relative position of metal covering and two flutings and size and feedback point sees also shown in Figure 2.

See also Fig. 3 and shown in Figure 4, it is respectively the utility model double-frequency slotted antenna 1 of recording of experiment when working in than low-frequency range and higher frequency band, the curve chart that voltage standing wave ratio (VSWR) changes with operating frequency.On scheming, can find out, when the value of voltage standing wave ratio less than 2 the time, all have the operating frequency that is positioned at predetermined working frequency range (2.4GHz and 5GHz), so double-frequency slotted antenna 1 all can satisfy job requirement under two kinds of frequency ranges.

See also Fig. 5, Fig. 6, Fig. 7 and shown in Figure 8, it is respectively the utility model double-frequency slotted antenna 1 of recording of experiment when working in than low frequency (2437.5MHz) and higher-frequency (5250MHz), the electromagnetic wave vertical and horizontal field pattern that polarizes.The polarization field pattern of polarization field pattern under these four kinds of situations during all very near perfect condition, so double-frequency slotted antenna 1 all can reach requirement than the gain of the working electromagnet ripple under low frequency and the higher-frequency situation.

The utility model double-frequency slotted antenna also can realize that embodiment sees also shown in Figure 9 by etching corresponding fluting in the printed circuit board (PCB) metal surface.

In addition, for satisfying the requirement of different antenna installing spaces, can also the cross-notching shape do further distortion, embodiment sees also Figure 10 and shown in Figure 11, wherein, two flutings of double-frequency slotted antenna shown in Figure 10 are bending, and two fluting ends of double-frequency slotted antenna shown in Figure 11 are interconnected, and the internal core wire of its coaxial cable and braid are communicated with the metal covering of holding both sides with two flutings respectively and electrically connect.

Claims

1. double-frequency slotted antenna, comprise metal covering, be located at first and second fluting on the metal covering with different specific dimensions, and the coaxial cable that electrically connects with metal covering, wherein coaxial cable comprises internal core wire and braid, it is characterized in that: the metal covering outside the internal core wire of described coaxial cable and braid are slotted with first and second respectively electrically connects.

2. double-frequency slotted antenna according to claim 1 is characterized in that: described first and second fluting is not communicated with mutually.

3. double-frequency slotted antenna according to claim 1 is characterized in that: described first and second fluting end is connected.

4. according to claim 2 or 3 described double-frequency slotted antennas, it is characterized in that: the internal core wire of described coaxial cable and braid electrically connect with the metal covering of the relative both sides of two fluting corresponding end respectively.

5. double-frequency slotted antenna according to claim 4 is characterized in that: described two flutings can be linearity or bending.

6. double-frequency slotted antenna according to claim 5 is characterized in that: described metal covering and last two flutings thereof can be made by the sheet metal punching press separately, also can be formed by the etching of printed circuit board (PCB) metal surface.