CN2636438Y

CN2636438Y - Multiloop antenna

Info

Publication number: CN2636438Y
Application number: CN 03275630
Authority: CN
Inventors: 曾泓玮; 邓聖明
Original assignee: Inpaq Technology Co Ltd
Current assignee: Inpaq Technology Co Ltd
Priority date: 2003-07-11
Filing date: 2003-07-11
Publication date: 2004-08-25
Anticipated expiration: 2013-07-11

Abstract

A multi-loop antenna comprises two or more than two groups of antenna unit with varied length. Wherein, the antenna unit is composed of metal conductors to receive different resonance frequency, a plurality of connecting conductors to connect with two or more than two groups of metal antenna unit with varied length through the connecting conductors, thus providing various modular connections of different patterns and achieving multi-frequency and/or broadband receiving effect.

Description

Multi-loop antenna

Technical field

The utility model relates to a kind of multi-loop antenna; Particularly a kind of by the array link conductor, linking the different antenna element of two groups or more receive frequency, and reach the multi-loop antenna of the reception of multifrequency and wideband.

Background technology

The structure of general mobile phone concealed antenna, shown in Figure 1A to Figure 1B, the top is a sheet type antenna substrate 200, the below is a motherboard 100, its two link to each other by connecting structure 300; The general mode that increases frequency range is for increasing the spacing d between sheet type antenna substrate 200 and the motherboard 100, shown in Figure 1B; Spacing d is big more, and sheet type antenna equivalence Q value is low more, and signal receives the frequency range increase.

But, can't allow the distance between sheet type antenna structure thing and the motherboard excessive because the thickness of the equipment of general mobile communication is limited; Thereby on the circuit structure design of antenna, utilize multi-modal notion, and make near a plurality of different resonance of the generation of same resonance frequency touch state combination, reach the effect of wideband; And can make antenna be able to multiband and receive signal by multiloop antenna structure design.

The structural design of conventional thin chip antenna is shown in Fig. 2 A to Fig. 2 B; Can be found out obviously that by these figure on sheet type antenna substrate 200, circuit structure is by two groups of

antenna

4a, 4b forms; Wherein long band 4a is positioned at the outside, connect earth terminal, and short band 4b is positioned at the inboard, and links the signal feed side; A bonding conductor 4c is only arranged as binding between long band 4a and the short band 4b; Electric current 900 is passed to earth terminal by short band 4a through bonding conductor 4c and long band 4b by the signal feed side, and forms a complete loops.

Described electric current structure has certain benifit for the antenna of sheet type antenna, but still has deficiency:

The electric current of such sheet type antenna, because position and the quantity of its bonding conductor 4c are a stationary state, therefore the current circuit that is produced has only one group, can't make multifrequency and receive.

In addition, the current circuit of such sheet type antenna is for fixing, makes fixed-frequency thereby system's reception poor effect of this type of frequency range.

Summary of the invention

In view of this, first purpose of the present utility model aims to provide a kind of multi-loop antenna, because the difference of the reception frequency of antenna, its binding is increased the reception frequency range of antenna.

Another purpose of the present utility model is that according to this kind multi-loop antenna of the present utility model, the antennas reception scope is different by the array link conductor link, and receives signal with multifrequency, and can adjust the ratio of the receive frequency of antenna element.

Another purpose of the present utility model is, according to this kind multi-loop antenna of the present utility model, by two groups or more bonding conductor, and the binding that produces different kenels, make and two groups or more mode reception of antenna increase the changeability and the flexibility of reception effect.

The technical solution of the utility model is: a kind of multi-loop antenna comprises: corresponding different frequencies, in order to receive the multifrequency signal as the different metallic conductor of the length of antenna element; Also comprise and being positioned between antenna element, in order to link the different metallic conductor of described array length, and, producing different modules, and reach two groups or more link conductor of the reception of multifrequency and wideband by the binding between above-mentioned link conductor and the antenna element.

Detailed construction of the present utility model, application principle, effect and effect, the explanation of doing with reference to following accompanying drawing are understood completely:

Description of drawings

Figure 1A, Figure 1B: the embodiment diagrammatic sketch of traditional hidden antenna for mobile phone.

Fig. 2 A: the circuit structure embodiment schematic diagram of conventional thin chip antenna.

Fig. 2 B: in the circuit structure of conventional thin chip antenna, the schematic diagram of current circuit.

Fig. 3 A, Fig. 3 B and Fig. 3 C: in the multi-loop antenna of the present utility model, the schematic diagram of current circuit.

Fig. 4: the preferred embodiment figure of multi-loop antenna of the present utility model.

Fig. 5: be single loop antenna structure view of the present utility model and frequency and standing-wave ratio comparison diagram.

Fig. 6: be double loop of the present utility model antenna structure view and frequency and standing-wave ratio comparison diagram.

Fig. 7: be three loop antenna structural representations of the present utility model and frequency and standing-wave ratio comparison diagram.

Fig. 8: be four loop antenna structural representations of the present utility model and frequency and standing-wave ratio comparison diagram.

Fig. 9: be the perspective structure diagrammatic sketch of Fig. 8.

Embodiment

Figure 1A to Fig. 2 B is the current circuit embodiment situation of conventional thin chip antenna; Its effect and its shortcoming, as previously mentioned, repeated description no longer herein.

Fig. 3 A and Fig. 3 B are the schematic diagram of current circuit in the multi-loop antenna of the present utility model; Shown in this figure, this kind multi-loop antenna of the present utility model comprises: two groups or more antenna element a1, and a2, wherein one group of antenna element a1 is a ground connection, another group antenna element a2 is in order to the feed-in signal; Wherein, antenna element a1 can receive a certain characteristic frequency, and antenna element a2 can receive another characteristic frequency; Again by shown in this figure, on the multi-loop antenna of the present utility model, be provided with single group, two groups or more bonding conductor c1 and c2; When current circuit was a1-c1-a2, described loop can receive a characteristic frequency; And when current circuit was a1-c2-a2, the equivalent length that is produced was different with current circuit a1-c1-a2, and received another frequency, as shown in Fig. 3 B to Fig. 3 C; Because antenna a1, the difference of the reception frequency of a2 produces its binding two groups or more mode and receives signal with multifrequency, and has increased the frequency range of antenna reception.

Fig. 4 is the enforcement illustration of multi-loop antenna of the present utility model; Shown in this figure, antenna element (long band) a1 is positioned at the inboard of sheet type antenna substrate 20, and its outside centers on by antenna element (short band) a2, its two between a specific range apart, and pass through two groups or more bonding conductor c1, c2 links.

By shown in Figure 4, the a1 front end stretches out an earth terminal d1 to antenna element (long band) again, and signal end d2 is stretched out by antenna element (short band) a2 front end; Wherein, earth terminal d1 and signal end d2 are by made with antenna element (short band) material that a2 is identical with antenna element (long band) a1, and respectively one-body molded with antenna element (long band) a1 and antenna element (short band) a2, with binding motherboard 10, and form multi-loop antenna of the present utility model.

Benefit of the present utility model can illustrate to such an extent that prove by following:

1, referring to Fig. 5, single loop antenna structure diagrammatic sketch can be known by its frequency and standing-wave ratio (VSWR) contrast chart and to find out, VSWR≤2 o'clock, and the low frequency centre frequency is 1.15GHz, frequency range 50MHz, high frequency centre frequency 1.9GHz, frequency range 80MHz.

2, when add a loop at Fig. 5, as shown in Figure 6, in VSWR≤2 o'clock, the low frequency centre frequency is 1.15GHz, and frequency range changes 80MHz into, and the high frequency centre frequency moves to 1.67GHz, frequency range 50MHz.

3, when add two loops at Fig. 5, as shown in Figure 7, in VSWR≤2 o'clock, the low frequency centre frequency is 1.13GHz, and frequency range is 80MHz, and the high frequency centre frequency then moves to 1.4GHz, frequency range 50MHz.

4, when add the bar loop at Fig. 7, as shown in Figure 8, low frequency changes 1.2GHZ into, and frequency range then significantly changes 210MHz into, and its detailed structure as shown in Figure 9.

By it, the utility model really can reach via the increase and decrease to the loop adjusts frequency or frequency range, increases the changeability and the flexibility of reception.

Pass through said structure, this kind multi-loop antenna of the present utility model can connect mode by varying number and the bonding conductor that is connected kenel, makes two groups or more mode reception of antenna, increase the changeability and the flexibility of reception effect, and reach the effect that increases the reception frequency range.

Need illustrate, the above is the preferred specific embodiment of the utility model, if comply with the change that conception of the present utility model is done, and when the function that it produced does not exceed specification and graphic contain spiritual yet, all should be in scope of the present utility model.

Claims

1, a kind of multi-loop antenna is characterized in that: comprising: corresponding different frequencies, in order to receive the multifrequency signal as the different array metal conductor of the length of antenna element; Also comprise and being positioned between antenna element, in order to link the different metallic conductor of described array length, and, producing different modules, and reach two groups or more link conductor of the reception of multifrequency and wideband by the binding between above-mentioned link conductor and the antenna element.

2, the multi-loop antenna described in claim 1 is characterized in that: the quantity of antenna element is two groups or more.

3, the multi-loop antenna described in claim 1 is characterized in that: be positioned at the link conductor between antenna element, quantity is single group, more than two groups or two groups.

4, the multi-loop antenna described in claim 1 is characterized in that: antenna element is at a distance of a specific range.

5, the multi-loop antenna described in claim 1 is characterized in that: described antenna element, its front end respectively stretch out an end body, link with motherboard.

6, the multi-loop antenna described in claim 1 or 5 is characterized in that: described end body and antenna element are one-body molded.