CN103682594A - Low-frequency radiation unit and double-frequency antenna - Google Patents
Low-frequency radiation unit and double-frequency antenna Download PDFInfo
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- CN103682594A CN103682594A CN201310566267.2A CN201310566267A CN103682594A CN 103682594 A CN103682594 A CN 103682594A CN 201310566267 A CN201310566267 A CN 201310566267A CN 103682594 A CN103682594 A CN 103682594A
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Abstract
The invention discloses a low-frequency radiation unit and a double-frequency antenna. The low-frequency radiation unit comprises a pedestal and two pairs of baluns arranged on the pedestal. The low-frequency radiation unit also comprises two pairs of dipoles which are respectively arranged on the two pairs of baluns, wherein an oscillator arm of any of the dipoles contains a first arm section and a second arm section. One end of the first arm section is fixed on the top of a balance arm of a corresponding balun of the dipole, and the other end of the first arm is connected with the second arm section. The inner included angle between the first arm section and the second arm section is an obtuse angle which is no greater than 135 degrees. The first arm section and a plane of the first arm section and the second arm section are both perpendicular to a plane of the balance arm of the corresponding balun of the dipole. The sum of lengths of the first arm section and the second arm section is less than 0.25 times of wavelength of center frequency of the low-frequency radiation unit, and the length of the first arm section is less than the length of the second arm section. According to the low-frequency radiation unit, side length of a square formed by the oscillator arms is equal to caliber of the low-frequency radiation unit and is less than caliber of a present low-frequency radiation unit.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of low frequency radiation unit and dual-band antenna.
Background technology
At present, moving communicating field presents second generation 2G(second generation) mobile communications network and third generation 3G(third Generation) situation that coexists of mobile communications network.For both can be for using the user of 2G network that communication service is provided, also can be for using the user of 3G mobile communications network that communication service was provided, the antenna of mobile communication base station must possess the function that compatible 2G and 3G mobile communications network communicate.
The antenna of the mobile communication base station on market had both been provided with high frequency radiation unit conventionally, was provided with again low frequency radiation unit; High frequency radiation unit is often served 3G mobile communications network accordingly, and low frequency radiation unit is often served 2G mobile communications network accordingly.The antenna that is simultaneously provided with high frequency radiation unit and low frequency radiation unit is referred to herein as dual-band antenna.
The schematic top plan view of the structure of existing dual-band antenna, as shown in Figure 1a, generally includes: a plurality of low frequency radiations unit 101, a plurality of high frequency radiations unit 102 and reflecting plate 103.Each low frequency radiation unit 101 and each high frequency radiation unit 102 are all vertically arranged on reflecting plate 103, and are array distribution on reflecting plate 103.By several low frequency radiation unit 101 and several high frequency radiation unit 102, is formed single-row in, conventionally understand between two adjacent low frequency radiation unit 101, being provided with N(N and being more than or equal to 1 natural number) individual high frequency radiation unit 102.
The schematic top plan view of the structure of existing a kind of low frequency radiation unit 101, as shown in Figure 1 b, comprising: the dipole of two pairs of dual polarization quadratures 111, two pairs of Ba Lun 112 and bases 113.
Two couples of Ba Lun 112 are arranged on base 113, and two electrode couple 111 are arranged at respectively on two Ba Lun 112; A Ba Lun 112 generally includes two counter-jibs parallel to each other 122; Each counter-jib 122 is arc shaped, can determine a plane, is this counter-jib place plane.
A dipole 111 generally includes the oscillator arms 121 of two polarity quadratures; Each oscillator arms 121 comprises unit arm 131 and is arranged at the loaded segment 132 of unit arm 131 ends.Unit arm 131 is fixed on the top of the counter-jib 122 of the Ba Lun that this dipole is corresponding, and extends to the outside of this Ba Lun, perpendicular with the counter-jib 122 place planes of the corresponding Ba Lun of this dipole.
As shown in Figure 1a, the ultimate range between the end of the oscillator arms 121 of the identical polar of two relative dipoles 111 in low frequency radiation unit 101 (being the end of unit arm 131 of the oscillator arms 121 of identical polar) is the bore of low frequency radiation unit 101; High frequency radiation unit 102 is arranged at the bore outside of low frequency radiation unit 101.This bore is often not less than 0.7 times of wavelength of low frequency radiation unit 101 centre frequencies.
When existing dual-band antenna miniaturization (reducing the distance between each adjacent radiation unit), as shown in Figure 1a, distance between existing low frequency radiation unit and adjacent high frequency radiation unit reduces, the setting position of high frequency radiation unit probably falls into it within the scope of the bore of adjacent existing low frequency radiation unit, the oscillator arms that is existing low frequency radiation unit forms and blocks adjacent high frequency radiation unit, cause the radiance of high frequency radiation unit to decline, thereby cause the radiance of whole dual-band antenna to decline.
Therefore, be necessary to provide a kind of and can guarantee radiance and there is more small-bore low frequency radiation unit, to meet the requirement of dual-band antenna miniaturization.
Summary of the invention
The defect existing for above-mentioned prior art, the invention provides a kind of low frequency radiation unit and dual-band antenna, can, guaranteeing, on the radiance basis of low frequency radiation unit, to reduce the bore of low frequency radiation unit, be beneficial to the miniaturization of dual-band antenna.
Technical scheme of the present invention, according to an aspect, provides a kind of low frequency radiation unit, comprising: base, be arranged at two couples of Ba Lun on described base; It also comprises: be divided into two electrode couples on two couples of Ba Lun, and arbitrary dipole wherein, the oscillator arms of this dipole comprises: the first arm joint and the second arm save; Wherein,
The top of the counter-jib of the Ba Lun that this dipole is corresponding is fixed in one end of the first arm joint, and the other end connects the second arm joint; Interior angle between the first arm joint and the second arm joint is to be not more than the obtuse angle of 135 °;
The counter-jib place plane of the Ba Lun that the first arm joint is corresponding with this dipole is vertical, and the first arm joint is vertical with this counter-jib place plane with the second arm joint place plane;
The length sum of the first arm joint and the second arm joint is less than 0.25 times of wavelength of described low frequency radiation unit center frequency, and the length of the first arm joint is less than the length of the second arm joint.
Preferably, the length of the first arm joint of described oscillator arms is less than 1/3 length of the second arm joint of described oscillator arms.
Further, described oscillator arms, also comprises: two loaded segment; And
Described two loaded segment are vertically installed in respectively upper surface and the lower surface of end of the second arm joint of described oscillator arms.
Or described oscillator arms, also comprises: two loaded segment; And
For arbitrary dipole in described low frequency radiation unit, two oscillator arms of this dipole are respectively the first oscillator arms and the second oscillator arms; Wherein, the set-up mode of the loaded segment of the first oscillator arms is the first set-up mode; The set-up mode of the loaded segment of the second oscillator arms is the second set-up mode; And the set-up mode of the loaded segment of the oscillator arms between adjacent two Ba Lun is identical;
Wherein, in the first oscillator arms, two loaded segment of the first set-up mode are vertically installed in respectively upper surface and the lower surface of end of the second arm joint of the first oscillator arms;
Two of the second set-up mode loaded segment in the second oscillator arms, one of them loaded segment is vertically installed in the upper surface of end of the second arm joint of the second oscillator arms, and another loaded segment is vertically installed in the outer surface of end of the second arm joint of the second oscillator arms.
Preferably, the summation of first and second arm joint of described oscillator arms and the effective length of each loaded segment equals 0.25 times of wavelength of described low frequency radiation unit center frequency.
Preferably, described first and second arm joint is strip, and cross section is rectangle.
Preferably, described loaded segment is strip, and its cross section is specially L-type or rectangle.
Further, described oscillator arms also comprises: the end saving with the second arm of this oscillator arms is connected, and is positioned at conplane the 3rd arm joint with first and second arm joint of this oscillator arms; And
For arbitrary dipole in described low frequency radiation unit, two oscillator arms of this dipole are respectively the first oscillator arms and the second oscillator arms; And two oscillator arms between adjacent two Ba Lun are respectively the first oscillator arms and the second oscillator arms;
Wherein, the 3rd arm joint of the first oscillator arms extends to described low frequency radiation unit inside from the end of the second arm joint of the first oscillator arms;
The 3rd arm joint of the second oscillator arms extends to outside, described low frequency radiation unit from the end of the second arm joint of the second oscillator arms.
Further, described oscillator arms also comprises: the end saving with the 3rd arm of this oscillator arms is connected, and the 4th arm joint that is positioned at same plane, parallels with the second arm joint of this oscillator arms with first and second arm joint of this oscillator arms.
Preferably, the summation of the effective length of first, second and third and four arms joints of described oscillator arms equals 0.25 times of wavelength of described low frequency radiation unit center frequency.
Preferably, described third and fourth arm joint is strip, and cross section is rectangle.
Preferably, the length of the first arm joint of described low frequency radiation unit is 0.
Preferably, described Ba Lun comprises: two counter-jibs; The back side of described two counter-jibs offers respectively groove, in order to penetrate service cable.
Preferably, in two counter-jibs of described Ba Lun, the top of a counter-jib offers the cable hole being communicated with described groove, in order to penetrate the heart yearn of described service cable;
The top of another counter-jib is provided with projection, in order to be connected with the heart yearn of described service cable by feed tab.
Technical scheme of the present invention, according to going back an aspect, provides a kind of dual-band antenna, comprising: reflecting plate, is arranged at the high frequency radiation unit on described reflecting plate, and the low frequency radiation unit providing in the technical solution of the present invention on described reflecting plate is provided.
The low frequency radiation unit that the embodiment of the present invention provides, its bore length equals the foursquare length of side that in this low frequency radiation unit, each oscillator arms roughly forms; And the bore length of existing low frequency radiation unit equals the foursquare catercorner length that in existing low frequency radiation unit, each oscillator arms forms; Compared to existing technology, reduce the bore of low frequency radiation unit, be conducive to the miniaturization of dual-band antenna;
And, the low frequency radiation unit that the embodiment of the present invention provides, in its oscillator arms, the end of the second arm joint arranges loaded segment or more arm joint, can be so that the effective length of this oscillator arms reaches requirement; Thereby in the bore that reduces low frequency radiation unit, guarantee the radiance of low frequency radiation unit.
Accompanying drawing explanation
Fig. 1 a is the schematic top plan view of structure of the dual-band antenna of prior art scheme;
Fig. 1 b is the schematic top plan view of structure of the low frequency radiation unit of prior art scheme;
Fig. 2 a is the schematic top plan view of structure of the dual-band antenna of the embodiment of the present invention;
The schematic perspective view of the structure of the low frequency radiation unit that Fig. 2 b, Fig. 2 c and Fig. 2 d are the embodiment of the present invention;
Fig. 2 e is that the first arm joint length of the embodiment of the present invention is the schematic top plan view of the structure of zero low frequency radiation unit;
Fig. 2 f be the embodiment of the present invention containing the first arm joint length, be the schematic top plan view of structure of the dual-band antenna of zero low frequency radiation unit.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, referring to accompanying drawing and enumerate preferred embodiment, the present invention is described in more detail.Yet, it should be noted that, many details of listing in specification are only used to make reader to have a thorough understanding to one or more aspects of the present invention, even if do not have these specific details also can realize these aspects of the present invention.
The present inventor's discovery, the bore of existing low frequency radiation unit is mainly determined by the oscillator arms of dipole: the oscillator arms of 4 dipoles has roughly formed a square, and the bore of existing low frequency radiation unit is positioned at this foursquare diagonal place.For reducing the bore of low frequency radiation unit, the inventor of invention considers, change the shape of the oscillator arms of dipole, although the oscillator arms of 4 dipoles after change roughly still can form a square, but the bore length that makes low frequency radiation unit equals this foursquare length of side, and the length of oscillator arms does not reduce; Thereby, reach under the prerequisite of length that guarantees oscillator arms, reduce the bore length of low frequency radiation unit; When namely guaranteeing the radiance of low frequency radiation unit, reduce the bore of low frequency radiation unit, thereby be convenient to the miniaturization of dual-band antenna.
Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail.
The schematic top plan view of the structure of the dual-band antenna that the embodiment of the present invention provides, as shown in Figure 2 a, can comprise: at least one low frequency radiation unit 201, at least one high frequency radiation unit 202 and reflecting plate 203.
At least one low frequency radiation unit 201 and at least one high frequency radiation unit 202 are all vertically arranged on reflecting plate 203, and are array distribution on reflecting plate 203.
In fact, by several low frequency radiation unit 201 and several high frequency radiation unit 202, formed single-row in, the radiating element adjacent with low frequency radiation unit 201 can be set to high frequency radiation unit 202.
The schematic perspective view of the structure of the low frequency radiation unit 201 of the embodiment of the present invention, as shown in Figure 2 b, can comprise: two electrode couple 211, two pairs of Ba Lun 212 and bases 213.
Two couples of Ba Lun 212 are arranged on base 213, and two electrode couple 211 respectively correspondence are arranged on two couples of Ba Lun 212; A Ba Lun 212 can comprise two counter-jibs parallel to each other 222; Each counter-jib 222 is arc shaped, can determine a plane, is this counter-jib place plane.
One end of the first arm joint 231 of two oscillator arms 221 of this dipole 211 is fixedly installed on respectively the top of two counter-jibs 222 of the corresponding Ba Lun 212 of this dipole, and from the top of the counter-jib 222 that is fixedly installed separately, to the outside of this Ba Lun, extend respectively, and perpendicular with the counter-jib 222 place planes of this Ba Lun 212; The first arm joint 231 can be specifically that cross section is the metal of the strip of rectangle.
For an oscillator arms 221, the top of the counter-jib 222 of the Ba Lun 212 that this dipole is corresponding is fixed in one end of its first arm joint 231, the other end of its first arm joint 231 connects its second arm joint 232, and the second arm joint 232 is arranged at the end of the first arm joint 231.
For ease of describing, angle towards inside, low frequency radiation unit between first arm joint the 231 and second arm joint 232 of an oscillator arms 221 is called to interior angle herein, the angle towards outside, low frequency radiation unit between first arm joint the 231 and second arm joint 232 of an oscillator arms 221 is called to outer angle; Interior angle between first arm joint the 231 and second arm joint 232 of an oscillator arms 221 is to be not more than the obtuse angle of 135 °; The second arm joint 232 can be specifically that cross section is the metal of the strip of rectangle.
For a dipole, it is perpendicular with the counter-jib 222 place planes of the corresponding Ba Lun 212 of this dipole that first arm joint the 231 and second arm of an oscillator arms 221 of this dipole saves 232 place planes.
The length of the first arm joint 231 of an oscillator arms 221 is less than the length of the second arm joint 232 of this oscillator arms 221, and the summation of the length of the first arm joint the 231 and second arm joint 232 is not more than 0.25 times of wavelength of low frequency radiation unit 201 centre frequencies.Preferably, the length of the first arm joint 231 of an oscillator arms 221 is less than 1/3 length of the second arm joint 232 of this oscillator arms 221.
In fact, first arm joint the 231 and second arm joint 232 of each dipole in low frequency radiation unit 201 can be positioned at same plane, and this plane can be parallel with reflecting plate 203.
According to the shape of above-mentioned oscillator arms and setting position, the bore of the low frequency radiation unit 201 of the embodiment of the present invention as shown in Figure 2 a, each oscillator arms that therefrom can find out the low frequency radiation unit 201 of the embodiment of the present invention has roughly formed a square, and the bore length of this low frequency radiation unit 201 equals this foursquare length of side.And in the square that in the existing low frequency radiation unit 101 of mentioning in this paper background technology, each oscillator arms 121 roughly forms, the bore of low frequency radiation unit 101 is positioned on this foursquare diagonal.Obviously, the bore that length equals the foursquare length of side is less than length and equals foursquare cornerwise bore, and the bore of the low frequency radiation unit 201 of the embodiment of the present invention is less than the bore of existing low frequency radiation unit 101.
In order to make the effective length of oscillator arms reach requirement, the mode that can set up loaded segment at oscillator arms end increases the effective length of oscillator arms:
A kind of mode of setting up loaded segment that the embodiment of the present invention provides, as shown in Figure 2 b, for each dipole 211 in low frequency radiation unit 201, this dipole can comprise two oscillator arms 221; For each oscillator arms 221 in this dipole, this oscillator arms can also comprise: two loaded segment 2331.
Wherein, two loaded segment 2331 are vertically installed in respectively upper surface and the lower surface of end of the second arm joint 232 of this oscillator arms, two loaded segment 2331 are arranged at respectively upper surface and the lower surface of end of the second arm joint 232 of this oscillator arms, and all saving the 231 and second arm with the first arm of this oscillator arms, to save 232 place planes perpendicular; Namely, two of an oscillator arms loaded segment 2331 all save 232 vertical, corresponding with this oscillator arms counter-jib 222 place plane parallel with the second arm of this oscillator arms.
For ease of describing, the second arm joint 232 is called to the lower surface of the second arm joint 232 herein towards the surface of reflecting plate 203, the surface that the second arm is saved to 232 back-reflection plates 203 is called the upper surface of the second arm joint 232; The inner surface that the second arm joint 232 is called to the second arm joint 232 towards the surface of inside, low frequency radiation unit, is called the second arm by the second arm joint 232 and saves 232 outer surface towards the surface of outside, low frequency radiation unit.
In actual applications, the length of loaded segment 2331 that is arranged at the lower surface of the second arm joint 232 is not more than below length threshold, to avoid causing the obvious interference to adjacent high frequency radiation unit; This below length threshold can rule of thumb be set by those skilled in the art.
Preferably, for guaranteeing that the effective length of oscillator arms reaches requirement, the summation of first arm joint the 231, second arm joint 232 in oscillator arms 221 and the effective length of each loaded segment 2331 can equal 0.25 times of wavelength of low frequency radiation unit 201 centre frequencies.Like this, also can guarantee the radiance of low frequency radiation unit 201 subtracting the small-bore while.
For each loaded segment 2331 in low frequency radiation unit 201, this loaded segment 2331 is elongated, and its cross section can be L-type (consistent with the cross section of angle steel), or its cross section can be also rectangle.
The another kind that the embodiment of the present invention provides is set up the mode of loaded segment, and as shown in Figure 2 c, for arbitrary dipole 211 in low frequency radiation unit 201, two oscillator arms 221 of this dipole can be respectively specifically the first oscillator arms 2211 and the second oscillator arms 2212.
Wherein, the first oscillator arms 2211 comprises that set-up mode is two loaded segment 2337 of the first set-up mode; The second oscillator arms 2212 comprises that set-up mode is two loaded segment 2338 of the second set-up mode; The set-up mode of the loaded segment of the oscillator arms between adjacent two Ba Lun is identical: for example, two oscillator arms between adjacent two Ba Lun 212 can be the first oscillator arms 2211, or are the second oscillator arms 2212.
In above-mentioned the first oscillator arms 2211, two loaded segment 2337 of the first set-up mode are vertically installed in respectively upper surface and the lower surface of end of the second arm joint 232 of the first oscillator arms 2211; Two loaded segment 2337 are arranged at respectively upper surface and the lower surface of end of the second arm joint 232 of the first oscillator arms 2211, and all saving the 231 and second arm with the first arm of the first oscillator arms 2211, to save 232 place planes perpendicular.
Two loaded segment 2338 of the second set-up mode in above-mentioned the second oscillator arms 2212, one of them loaded segment 2338 is vertically installed in the upper surface of end of the second arm joint 232 of the second oscillator arms 2212, and another loaded segment 2338 is vertically installed in the outer surface of end of the second arm joint 232 of the second oscillator arms 2212; Loaded segment 2338 is arranged at the upper surface of end of the second arm joint 232 of the second oscillator arms 2212, and to save 232 place planes perpendicular with first arm joint the 231 and second arm of the second oscillator arms 2212; Another loaded segment 2338 is arranged at the outer surface of end of the second arm joint 232 of the second oscillator arms 2212, and saves 232 place plane parallel with first arm joint the 231 and second arm of the second oscillator arms 2212.
In actual applications, the length of loaded segment 2338 that is arranged at the outer surface of the second arm joint 232 is not more than export-oriented length threshold, to avoid causing the obvious interference to adjacent high frequency radiation unit; This extroversion length threshold can rule of thumb be set by those skilled in the art.
Preferably, for guaranteeing that the effective length of oscillator arms reaches requirement, the summation of first arm joint the 231, second arm joint 232 in oscillator arms 2211 and the effective length of each loaded segment 2337 can equal 0.25 times of wavelength of low frequency radiation unit 201 centre frequencies.
The summation of first arm joint the 231, second arm joint 232 in oscillator arms 2212 and the effective length of each loaded segment 2338 can equal 0.25 times of wavelength of low frequency radiation unit 201 centre frequencies.Like this, also can guarantee the radiance of low frequency radiation unit 201 subtracting the small-bore while.
Preferably, the shape of above-mentioned loaded segment 2337 and loaded segment 2338 is elongated, and cross section can be L-type (consistent with the cross section of angle steel), or is rectangle.
In addition, in order to make the effective length of oscillator arms reach requirement, can on first and second arm joint basis of oscillator arms, to set up the mode of arm joint, increase the effective length of oscillator arms, as shown in Figure 2 d, for arbitrary dipole 211 in low frequency radiation unit 201, two oscillator arms 221 of this dipole can be respectively specifically the first oscillator arms 2271 and the second oscillator arms 2272; And two oscillator arms between adjacent two Ba Lun 212 are respectively the first oscillator arms 2271 and the second oscillator arms 2272.
Wherein, the first oscillator arms 2271 can comprise: be connected with the end of the second arm joint 232 of this oscillator arms, and be positioned at conplane the 3rd arm with first arm joint the 231, second arm joint 232 of this oscillator arms and save 234; The 3rd arm joint 234 of the first oscillator arms 2271 extends 201 inner sides to low frequency radiation unit from the end of the second arm joint 232 of the first oscillator arms 2271; The 3rd arm joint 234 of the first oscillator arms 2271 can be specifically that cross section is the metal of the strip of rectangle.
The second oscillator arms 2272 can comprise: be connected with the end of the second arm joint 232 of this oscillator arms, and be positioned at conplane the 3rd arm with first arm joint the 231, second arm joint 232 of this oscillator arms and save 234; The 3rd arm joint 234 of the second oscillator arms 2272 extends in 201 outsides to low frequency radiation unit from the end of the second arm joint 232 of the second oscillator arms 2272; The 3rd arm joint 234 of the second oscillator arms 2272 can be specifically that cross section is the metal of the strip of rectangle.
Preferably, for guaranteeing that the effective length of oscillator arms reaches requirement, the summation of the effective length of first arm joint the 231, second arm joint the 232 and the 3rd arm joint 234 in oscillator arms 2271 can equal 0.25 times of wavelength of low frequency radiation unit 201 centre frequencies.
The summation of the effective length of first arm joint the 231, second arm joint the 232 and the 3rd arm joint 234 in oscillator arms 2272 can equal 0.25 times of wavelength of low frequency radiation unit 201 centre frequencies; Like this, also can guarantee the radiance of low frequency radiation unit 201 subtracting the small-bore while.
In addition, in order to make the effective length of oscillator arms reach requirement, can also on first, second and third arm joint basis of oscillator arms, continue to set up the effective length that arm saves to increase oscillator arms, as shown in Figure 2 d, for the first oscillator arms 2271 in each dipole 211 or the first oscillator arms 2272, this oscillator arms can also comprise: be connected with the end of the 3rd arm joint 234 of this oscillator arms, and be positioned at same plane, the 4th arm joint 235 paralleling with the second arm joint 232 of this oscillator arms with first arm joint the 231, second arm joint 232 of this oscillator arms.
The 4th arm joint 235 of this oscillator arms can be specifically that cross section is the metal of the strip of rectangle.
Preferably, for guaranteeing that the effective length of oscillator arms reaches requirement, the summation of the effective length of first arm joint the 231, second arm joint the 232, the 3rd arm joint the 234 and the 4th arm joint 235 in the first oscillator arms 2271 can equal 0.25 times of wavelength of low frequency radiation unit 201 centre frequencies.
The summation of the effective length of first arm joint the 231, second arm joint the 232, the 3rd arm joint the 234 and the 4th arm joint 235 in the second oscillator arms 2272 can equal 0.25 times of wavelength of low frequency radiation unit 201 centre frequencies.Like this, also can guarantee the radiance of low frequency radiation unit 201 subtracting the small-bore while.
For each Ba Lun 212 in low frequency radiation unit, the back side of two counter-jibs 222 of this Ba Lun 212 all offers for the groove of feeder cable cabling (not marking in figure), the top of a counter-jib 222 offers the cable hole (not marking in figure) being communicated with groove, and the top of another counter-jib 222 is provided with the projection (figure does not mark) for connecting feed tab.
In actual applications, for each Ba Lun 212, projection is connected with feed tab; Feeder cable is through the groove at counter-jib 222 back sides, through cable hole, and the heart yearn in feeder cable is connected with feed tab; The screen of feeder cable is being connected with the groove at counter-jib 222 back sides near cable hole place.
Distance in low frequency radiation unit 201 between the projection of two relative Ba Lun 212 is as the distance between the distributing point of a pair of dipole 211 of correspondence, and this distance can be specially 0.4～0.6 times of wavelength of low frequency radiation unit 201 centre frequencies.
In order to increase structural strength, to reduce the performance loss that each connected mode is brought, each oscillator arms in the low frequency radiation unit 201 providing for the embodiment of the present invention in dipole 211,232 and two loaded segment of first arm joint the 231, second arm joint in this oscillator arms can be one-body molded; Or first arm joint the 231, second arm joint the 232, the 3rd arm joint the 234 and the 4th arm joint 235 in this oscillator arms can be one-body molded.
Preferably, each dipole 211 of low frequency radiation unit 201, each Ba Lun 212 and base 213 can be one-body molded; Preferably, integrated mode can be integrated die cast.
As a kind of special case of above-mentioned low frequency radiation unit 201, as shown in Figure 2 e, the length of above-mentioned the first arm joint 231 can be zero, the second arm joint 232 be fixed on Ba Lun 212 the top of counter-jib 222.Dual-band antenna using the low frequency radiation unit 301 of this special case as low frequency radiation unit, and the bore of the low frequency radiation unit 301 of this special case is as shown in Fig. 2 f, low frequency radiation unit 301 each the second arm joints 232 that therefrom can find out the embodiment of the present invention have roughly formed a square, and the bore length of this low frequency radiation unit equals this foursquare length of side.And this foursquare length of side is less than the foursquare length of side that above-mentioned low frequency radiation unit 201 each oscillator arms form, the bore of the low frequency radiation unit 301 of the embodiment of the present invention is less than the bore of the low frequency radiation unit 101 of prior art.
The low frequency radiation unit that the embodiment of the present invention provides, its bore length equals the foursquare length of side that in this low frequency radiation unit, each oscillator arms roughly forms; And the bore length of existing low frequency radiation unit equals the foursquare catercorner length that in existing low frequency radiation unit, each oscillator arms forms; Compared to existing technology, reduce the bore of low frequency radiation unit, be conducive to the miniaturization of dual-band antenna.
And, the low frequency radiation unit that the embodiment of the present invention provides, in its oscillator arms, the end of the second arm joint arranges loaded segment or more arm joint, can be so that the effective length of this oscillator arms reaches requirement; Thereby in the bore that reduces low frequency radiation unit, guarantee the radiance of low frequency radiation unit.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (15)
1. a low frequency radiation unit, comprise: base, be arranged at two couples of Ba Lun on described base, it is characterized in that, also comprise: be divided into two electrode couples on two couples of Ba Lun, arbitrary dipole wherein, the oscillator arms of this dipole comprises: the first arm joint and the second arm save; Wherein,
The top of the counter-jib of the Ba Lun that this dipole is corresponding is fixed in one end of the first arm joint, and the other end connects the second arm joint; Interior angle between the first arm joint and the second arm joint is to be not more than the obtuse angle of 135 °;
The counter-jib place plane of the Ba Lun that the first arm joint is corresponding with this dipole is vertical, and the first arm joint is vertical with this counter-jib place plane with the second arm joint place plane;
The length sum of the first arm joint and the second arm joint is less than 0.25 times of wavelength of described low frequency radiation unit center frequency, and the length of the first arm joint is less than the length of the second arm joint.
2. low frequency radiation as claimed in claim 1 unit, is characterized in that, the length of the first arm joint of described oscillator arms is less than 1/3 length of the second arm joint of described oscillator arms.
3. low frequency radiation as claimed in claim 1 unit, is characterized in that, described oscillator arms, also comprises: two loaded segment; And
Described two loaded segment are vertically installed in respectively upper surface and the lower surface of end of the second arm joint of described oscillator arms.
4. low frequency radiation as claimed in claim 1 unit, is characterized in that, described oscillator arms, also comprises: two loaded segment; And
For arbitrary dipole in described low frequency radiation unit, two oscillator arms of this dipole are respectively the first oscillator arms and the second oscillator arms; Wherein, the set-up mode of the loaded segment of the first oscillator arms is the first set-up mode; The set-up mode of the loaded segment of the second oscillator arms is the second set-up mode; And the set-up mode of the loaded segment of the oscillator arms between adjacent two Ba Lun is identical;
Wherein, in the first oscillator arms, two loaded segment of the first set-up mode are vertically installed in respectively upper surface and the lower surface of end of the second arm joint of the first oscillator arms;
Two of the second set-up mode loaded segment in the second oscillator arms, one of them loaded segment is vertically installed in the upper surface of end of the second arm joint of the second oscillator arms, and another loaded segment is vertically installed in the outer surface of end of the second arm joint of the second oscillator arms.
5. low frequency radiation as claimed in claim 4 unit, is characterized in that, the summation of first and second arm joint of described oscillator arms and the effective length of each loaded segment equals 0.25 times of wavelength of described low frequency radiation unit center frequency.
6. the low frequency radiation unit as described in as arbitrary in claim 1-5, is characterized in that, described first and second arm joint is strip, and cross section is rectangle.
7. low frequency radiation as claimed in claim 6 unit, is characterized in that, described loaded segment is strip, and its cross section is specially L-type or rectangle.
8. low frequency radiation as claimed in claim 1 unit, is characterized in that, described oscillator arms also comprises: the end saving with the second arm of this oscillator arms is connected, and is positioned at conplane the 3rd arm joint with first and second arm joint of this oscillator arms; And
For arbitrary dipole in described low frequency radiation unit, two oscillator arms of this dipole are respectively the first oscillator arms and the second oscillator arms; And two oscillator arms between adjacent two Ba Lun are respectively the first oscillator arms and the second oscillator arms;
Wherein, the 3rd arm joint of the first oscillator arms extends to described low frequency radiation unit inside from the end of the second arm joint of the first oscillator arms;
The 3rd arm joint of the second oscillator arms extends to outside, described low frequency radiation unit from the end of the second arm joint of the second oscillator arms.
9. low frequency radiation as claimed in claim 8 unit, it is characterized in that, described oscillator arms also comprises: the end saving with the 3rd arm of this oscillator arms is connected, and the 4th arm joint that is positioned at same plane, parallels with the second arm joint of this oscillator arms with first and second arm joint of this oscillator arms.
10. low frequency radiation as claimed in claim 9 unit, is characterized in that, the summation of the effective length of first, second and third of described oscillator arms and four arms joint equals 0.25 times of wavelength of described low frequency radiation unit center frequency.
11. low frequency radiation unit as described in as arbitrary in claim 8-10, is characterized in that, described third and fourth arm joint is strip, and cross section is rectangle.
12. low frequency radiation unit as described in as arbitrary in claim 1-5,8-10, is characterized in that, the length of the first arm joint is 0.
13. low frequency radiation unit as described in as arbitrary in claim 1-5,8-10, is characterized in that, described Ba Lun comprises: two counter-jibs; The back side of described two counter-jibs offers respectively groove, in order to penetrate service cable.
14. low frequency radiation as claimed in claim 13 unit, is characterized in that, in two counter-jibs of described Ba Lun, the top of a counter-jib offers the cable hole being communicated with described groove, in order to penetrate the heart yearn of described service cable;
The top of another counter-jib is provided with projection, in order to be connected with the heart yearn of described service cable by feed tab.
15. 1 kinds of dual-band antennas, comprising: reflecting plate, is arranged at the high frequency radiation unit on described reflecting plate, and is arranged at the low frequency radiation unit as described in as arbitrary in claim 1-5,8-10 on described reflecting plate.
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