CN105006655A - Small-sized vehicle-mounted GPS micro-strip slot antenna - Google Patents
Small-sized vehicle-mounted GPS micro-strip slot antenna Download PDFInfo
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- CN105006655A CN105006655A CN201510373177.0A CN201510373177A CN105006655A CN 105006655 A CN105006655 A CN 105006655A CN 201510373177 A CN201510373177 A CN 201510373177A CN 105006655 A CN105006655 A CN 105006655A
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Abstract
The invention discloses a small-sized vehicle-mounted GPS micro-strip slot antenna. The slot antenna comprises a medium substrate, a grounding plate located on the lower side surface of the medium substrate and micro-strip lines located on the upper side surface of the medium substrate. The micro-strip lines comprise a rectangular principal arm micro-strip line, also comprise a first left side arm micro-strip line and a second left side arm micro-strip line which are located at the left side of the principal arm micro-strip line and connected with the principal arm micro-strip line, and also comprise a first right side arm micro-strip line and a second right side arm micro-strip line which are located at the right side of the principal arm micro-strip line and connected with the principal arm micro-strip line. The first left side arm micro-strip line, the second left side arm micro-strip line, the right side arm micro-strip line and the second right side arm micro-strip line are rectangular micro-strip lines. A left side rectangular gap and a right side rectangular gap are formed in the grounding plate. The projection of the left side rectangular gap is located at the left side of the principal arm micro-strip line. The projection of the right side rectangular gap is located at the right side of the principal arm micro-strip line.
Description
Technical field
The present invention relates to car antenna technology, specifically minisize vehicle-mounted GPS microstrip slot antenna.
Background technology
Common car antenna is all column antennas, it installs inconvenience, car body top is provided with outstanding, appearance effects is large, and antenna is external is often exposed to the weather, useful life is low, therefore, we need to arrange a kind of plate type antenna possessing more wide degree, the defect of traditional columnar antenna can be overcome, and the plate aerial set out can be integrated in roof, can not expose, surface structure moulding is good, useful life can improve, research in the past few years shows, TEM loudspeaker, paster antenna and slot antenna etc. can use as ultra-wideband antenna, wherein paster antenna has profile low, lightweight, the easily advantage such as integrated and low cost of manufacture, potential advantage is had in the application of mobile communication.But the bandwidth of paster antenna is narrow, some researchers have had a go at the work promoting bandwidth, and the shape of resistor loaded and change antenna is that two classes are successfully attempted.Resistor loaded can reduce the effect of antenna.Some plane single pole sub antennas have that larger floor is vertical with antenna arm places, and this brings inconvenience to the Miniaturization Design of antenna.The method that coplanar wave guide feedback and fluting combine also can increase the bandwidth of antenna.
Summary of the invention
The object of the present invention is to provide a kind of minisize vehicle-mounted GPS microstrip slot antenna, the wider broadband of antenna can be achieved.
Object of the present invention is achieved through the following technical solutions: minisize vehicle-mounted GPS microstrip slot antenna, comprise medium substrate, be positioned at the ground plate of medium substrate downside, be positioned at the microstrip line of medium substrate upper side, described microstrip line comprises the principal arm microstrip line of rectangle, also comprise be positioned at and be connected on the left of principal arm microstrip line and with principal arm microstrip line first on the left of arm microstrip line on the left of arm microstrip line and second, also comprise the first right arm microstrip line and the second right arm microstrip line that are positioned at and are connected on the right side of principal arm microstrip line and with principal arm microstrip line, arm microstrip line on the left of arm microstrip line and second on the left of in the of first, first right arm microstrip line and the second right arm microstrip line are rectangular microstrip line, gap on the left of in the of first on the left of arm microstrip line and second between arm microstrip line is gap P1, gap on the left of in the of first on the left of arm microstrip line and second between arm microstrip line is gap P2, P1 is less than P2, described ground plate also has left side rectangular aperture and right side rectangular aperture, the projection of left side rectangular aperture is positioned at the left side of principal arm microstrip line, the projection of right side rectangular aperture is positioned at the right side of principal arm microstrip line, principal arm microstrip line is also connected with differential input end.
Microstrip antenna structure of the present invention, utilizes the method for reactance loaded antenna to realize two-frequency operation, and now double frequency ratio can regulate more close.The top of this antenna is a left-right asymmetry branching type microstrip line, namely adopts the branching type microstrip line that above-mentioned four side arm microstrip lines and side arm microstrip line are formed.The advantage of branching type feed is that this feed method can obtain wider bandwidth and make antenna in very wide frequency range, reach good impedance matching.In the design, two rectangular apertures have been opened at ground plate, i.e. left side rectangular aperture and right side rectangular aperture, optimum Match is obtained by adjusting microstrip line branch and the relative position of rectangular aperture and the size of rectangular aperture, the Bottom ground plate of antenna etches two rectangular apertures, be equivalent to like this introduce two reactance elements, create two resonance points.Antenna can use FR-4 as medium substrate, and the thickness of substrate is 1.6 mm, and relative dielectric constant is 4.2, and ground plate is of a size of 50 mm × 50 mm.Because the edge in the face at rectangular aperture place exists stronger diffraction field, so select suitable dielectric substrate size, good far-field pattern can be obtained.Distributing point is at the center of broadside.
In order to realize the impedance matching of interface, the characteristic impedance of principal arm microstrip line is 50 Ω, and on the left of in the of first, on the left of arm microstrip line and second, the characteristic impedance of arm microstrip line, the first right arm microstrip line and the second right arm microstrip line is 100 Ω.
The width of principal arm microstrip line is W5, W5 is 3.0 mm.
The change to length L1, the L2 of two rectangular apertures and width W 3, W4 of the return loss of antenna is more responsive, therefore chooses above 4 parameters and carries out Parameter analysis to them.Each parameter choose initial value, when a Parameters variation, other parameters remain unchanged.Research finds, adopts following parameter, can obtain preferably antenna parameter, its parameter is as follows: the length of left side rectangular aperture is L1, and the length of right side rectangular aperture is L2, and the width of left side rectangular aperture is W3, the width of right side rectangular aperture is that W4, L1 are less than L2, and W3 is less than W4.L1 = 24 mm，L2 = 42 mm，W3 =13mm，W4 = 18 mm。
The invention has the advantages that: can find out from the gain of antenna at resonance frequency 1.9 GHz and 2.4 GHz two, the radiation of this slot antenna is amphitropic, the radiation field of gap upper and lower is the strongest, and radiation intensity is substantially identical.When the resonance frequency of antenna is 1.9 GHz, maximum gain is 1.4 dBi; When antenna resonance is 2.4 GHz frequently, maximum gain is 2.9 dBi.Antenna has certain directivity, but the gain of antenna is not high, and therefore this antenna can use as omnidirectional antenna, is applicable to receive radio-frequency wireless energy around.This antenna is easy to processing simultaneously, is particularly suitable for the integrated combination of car roof, does not affect car conour structure.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Reference numeral in figure is expressed as: 1, medium substrate, and 2, principal arm microstrip line, arm microstrip line on the left of in the of 4, first, 5, arm microstrip line on the left of second, 3, left side rectangular aperture, the 6, first right arm microstrip line, 7, the second right arm microstrip line, 8, right side rectangular aperture, 9, differential input end.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
embodiment 1:
As shown in Figure 1.
Minisize vehicle-mounted GPS microstrip slot antenna, comprise medium substrate 1, be positioned at the ground plate of medium substrate 1 downside, be positioned at the microstrip line of medium substrate 1 upper side, described microstrip line comprises the principal arm microstrip line 2 of rectangle, also comprise be positioned at and be connected on the left of principal arm microstrip line 2 and with principal arm microstrip line 2 first on the left of arm microstrip line 5 on the left of arm microstrip line 4 and second, also comprise the first right arm microstrip line 6 and the second right arm microstrip line 7 being positioned at and being connected on the right side of principal arm microstrip line 2 and with principal arm microstrip line 2, arm microstrip line 5 on the left of arm microstrip line 4 and second on the left of in the of first, first right arm microstrip line 6 and the second right arm microstrip line 7 are rectangular microstrip line, gap on the left of in the of first on the left of arm microstrip line 4 and second between arm microstrip line 5 is gap P1, gap on the left of in the of first on the left of arm microstrip line 4 and second between arm microstrip line 5 is gap P2, P1 is less than P2, described ground plate also has left side rectangular aperture 3 and right side rectangular aperture 8, the projection of left side rectangular aperture 3 is positioned at the left side of principal arm microstrip line, the projection of right side rectangular aperture 8 is positioned at the right side of principal arm microstrip line, principal arm microstrip line is also connected with differential input end 9.
Microstrip antenna structure of the present invention, utilizes the method for reactance loaded antenna to realize two-frequency operation, and now double frequency ratio can regulate more close.The top of this antenna is a left-right asymmetry branching type microstrip line, namely adopts the branching type microstrip line that above-mentioned four side arm microstrip lines and side arm microstrip line are formed.The advantage of branching type feed is that this feed method can obtain wider bandwidth and make antenna in very wide frequency range, reach good impedance matching.In the design, two rectangular apertures have been opened at ground plate, i.e. left side rectangular aperture and right side rectangular aperture, optimum Match is obtained by adjusting microstrip line branch and the relative position of rectangular aperture and the size of rectangular aperture, the Bottom ground plate of antenna etches two rectangular apertures, be equivalent to like this introduce two reactance elements, create two resonance points.Antenna can use FR-4 as medium substrate, and the thickness of substrate is 1.6 mm, and relative dielectric constant is 4.2, and ground plate is of a size of 50 mm × 50 mm.Because the edge in the face at rectangular aperture place exists stronger diffraction field, so select suitable dielectric substrate size, good far-field pattern can be obtained.Distributing point is at the center of broadside.
In order to realize the impedance matching of interface, the characteristic impedance of principal arm microstrip line is 50 Ω, and on the left of in the of first, on the left of arm microstrip line 4 and second, the characteristic impedance of arm microstrip line 5, first right arm microstrip line 6 and the second right arm microstrip line 7 is 100 Ω.
The width of principal arm microstrip line is W5, W5 is 3.0 mm.
The change to length L1, the L2 of two rectangular apertures and width W 3, W4 of the return loss of antenna is more responsive, therefore chooses above 4 parameters and carries out Parameter analysis to them.Each parameter choose initial value, when a Parameters variation, other parameters remain unchanged.Research finds, adopts following parameter, can obtain preferably antenna parameter, its parameter is as follows: the length of left side rectangular aperture 3 is L1, and the length of right side rectangular aperture 8 is L2, and the width of left side rectangular aperture 3 is W3, the width of right side rectangular aperture 8 is that W4, L1 are less than L2, and W3 is less than W4.L1 = 24 mm，L2 = 42 mm，W3 =13mm，W4 = 18 mm。
As mentioned above, then well the present invention can be realized.
Claims (5)
1. minisize vehicle-mounted GPS microstrip slot antenna, it is characterized in that: comprise medium substrate (1), be positioned at the ground plate of medium substrate (1) downside, be positioned at the microstrip line of medium substrate (1) upper side, described microstrip line comprises the principal arm microstrip line (2) of rectangle, also comprise and be positioned at principal arm microstrip line (2) left side and arm microstrip line (5) on the left of arm microstrip line (4) and second on the left of in the of be connected with principal arm microstrip line (2) first, also comprise and be positioned at principal arm microstrip line (2) right side and the first right arm microstrip line (6) be connected with principal arm microstrip line (2) and the second right arm microstrip line (7), arm microstrip line (5) on the left of arm microstrip line (4) and second on the left of in the of first, first right arm microstrip line (6) and the second right arm microstrip line (7) are rectangular microstrip line, gap on the left of in the of first on the left of arm microstrip line (4) and second between arm microstrip line (5) is gap P1, gap on the left of in the of first on the left of arm microstrip line (4) and second between arm microstrip line (5) is gap P2, P1 is less than P2, described ground plate also has left side rectangular aperture (3) and right side rectangular aperture (8), the projection in left side rectangular aperture (3) is positioned at the left side of principal arm microstrip line, the projection on right side rectangular aperture (8) is positioned at the right side of principal arm microstrip line, principal arm microstrip line is also connected with differential input end (9).
2. minisize vehicle-mounted GPS microstrip slot antenna according to claim 1, it is characterized in that: the characteristic impedance of principal arm microstrip line is 50 Ω, on the left of in the of first, on the left of arm microstrip line (4) and second, the characteristic impedance of arm microstrip line (5), the first right arm microstrip line (6) and the second right arm microstrip line (7) is 100 Ω.
3. minisize vehicle-mounted GPS microstrip slot antenna according to claim 1, is characterized in that: the width of principal arm microstrip line is W5, W5 is 3.0 mm.
4. minisize vehicle-mounted GPS microstrip slot antenna according to claim 1, it is characterized in that: the length of left side rectangular aperture (3) is L1, the length on right side rectangular aperture (8) is L2, the width in left side rectangular aperture (3) is W3, the width on right side rectangular aperture (8) is W4, L1 is less than L2, and W3 is less than W4.
5. minisize vehicle-mounted GPS microstrip slot antenna according to claim 4, is characterized in that: L1=24 mm, L2=42 mm, W3=13mm, W4=18 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510373177.0A CN105006655A (en) | 2015-07-01 | 2015-07-01 | Small-sized vehicle-mounted GPS micro-strip slot antenna |
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| CN201510373177.0A CN105006655A (en) | 2015-07-01 | 2015-07-01 | Small-sized vehicle-mounted GPS micro-strip slot antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018010168A1 (en) * | 2016-07-15 | 2018-01-18 | 华为技术有限公司 | Vehicle antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104269620A (en) * | 2014-09-30 | 2015-01-07 | 东南大学 | Broadband planar dipole antenna with notch reflector |
| CN204741077U (en) * | 2015-07-01 | 2015-11-04 | 成都众易通科技有限公司 | Low -cost on -vehicle GPS microstrip gap signal receiver |
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2015
- 2015-07-01 CN CN201510373177.0A patent/CN105006655A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269620A (en) * | 2014-09-30 | 2015-01-07 | 东南大学 | Broadband planar dipole antenna with notch reflector |
| CN204741077U (en) * | 2015-07-01 | 2015-11-04 | 成都众易通科技有限公司 | Low -cost on -vehicle GPS microstrip gap signal receiver |
Non-Patent Citations (1)
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| WO2018010168A1 (en) * | 2016-07-15 | 2018-01-18 | 华为技术有限公司 | Vehicle antenna |
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Application publication date: 20151028 |