CN2750495Y - Planar printed antenna - Google Patents
Planar printed antenna Download PDFInfo
- Publication number
- CN2750495Y CN2750495Y CN 200420093415 CN200420093415U CN2750495Y CN 2750495 Y CN2750495 Y CN 2750495Y CN 200420093415 CN200420093415 CN 200420093415 CN 200420093415 U CN200420093415 U CN 200420093415U CN 2750495 Y CN2750495 Y CN 2750495Y
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- CN
- China
- Prior art keywords
- antenna
- circuit substrate
- line segment
- planar printed
- minor face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a planar printed antenna, which comprises a circuit substrate with a dielectric coefficient, a first radiating line segment and a second radiating line segment, wherein the first radiating line segment is formed on the circuit substrate and has a first length; the second radiating line segment has a second length; the second radiating line segment and a first radiating part are mutually and symmetrically formed on the circuit substrate, and the second radiating line segment and the first radiating line segment can produce resonance in a specific frequency band; the dielectric coefficient of the circuit substrate makes the first and the second lengths of the first and the second radiating line segments are less than a quarter of the wave length of the specific frequency band.
Description
Technical field
The utility model relates to a kind of planar printed antenna, is meant a kind of symmetry of dipole antenna and dielectric coefficient of suitable design circuit substrate of utilizing especially, has good isotropic planar printed antenna and produce.
Background technology
As shown in Figures 1 and 2, it is the schematic diagram of a kind of in the past built-in (internal) dull and stereotyped (patch) antenna (claiming microstrip antenna again) 1 and PIFA antenna 2, these antennas are widely used in and generally comprise mobile phone in interior radio communication product owing to have that volume is little, in light weight, downside is high and advantage such as low cost.
And common characteristics of microstrip antenna 1 and PIFA antenna 2, be exactly to need collocation one ground plane under it usually, effectively to dwindle antenna length, area or volume by this ground plane, yet the area size of this ground plane, and the distance between ground plane and plate aerial 1 or the PIFA antenna 2, the related also radiation pattern of plate aerial 1 with PIFA antenna 2 that influenced makes plate aerial 1 and PIFA antenna 2 can't produce good omni-directional (omni-direction).
The utility model content
The purpose of this utility model be to provide a kind of size little, be easy to make and and produce good isotropic planar printed antenna.
The utility model planar printed antenna comprises a circuit substrate, one first radiation line segment and one second radiation line segment.This circuit substrate has a dielectric coefficient.This first radiation line segment is formed on this circuit substrate, has one first length.This second radiation line segment and this first radiation line segment are formed on this circuit substrate symmetrically, has one second length, and produce resonance with this first radiation line segment in a special frequency channel, and the dielectric coefficient of this circuit substrate makes the quarter-wave of this first and second length less than this special frequency channel.
Description of drawings
Below by most preferred embodiment and accompanying drawing the utility model planar printed antenna is elaborated, in the accompanying drawing:
Fig. 1 is a kind of schematic diagram of plate aerial in the past.
Fig. 2 is a kind of in the past schematic diagram of PIFA antenna.
Fig. 3 is the organigram of first embodiment of the utility model planar printed antenna.
Fig. 4 is the voltage standing wave ratio figure of first embodiment.
Fig. 5 is the horizontal polarization field pattern figure of first embodiment on the XY plane.
Fig. 6 is the perpendicular polarization field pattern figure of first embodiment on the XY plane.
Fig. 7 is the horizontal polarization field pattern figure of first embodiment on the XZ plane.
Fig. 8 is the perpendicular polarization field pattern figure of first embodiment on the XZ plane.
Fig. 9 is the horizontal polarization field pattern figure of first embodiment on the YZ plane.
Figure 10 is the perpendicular polarization field pattern figure of first embodiment on the YZ plane.
Figure 11 is the organigram of second embodiment of the utility model planar printed antenna, wherein shows the wire laying mode of the 3rd and the 6th antenna part on the top plate of circuit substrate of first and second radiation line segment.
Figure 12 shows the wire laying mode of the 3rd and the 6th antenna part on the lower plywood of circuit substrate of first and second radiation line segment of second embodiment.
Figure 13 is the wire laying mode schematic diagram of the 3rd and the 6th antenna part of first and second radiation line segment of second embodiment.
Figure 14 is the voltage standing wave ratio figure of second embodiment.
Figure 15 is level and the perpendicular polarization field pattern figure of second embodiment on the XY plane.
Figure 16 is level and the perpendicular polarization field pattern figure of second embodiment on the XZ plane.
Figure 17 is level and the perpendicular polarization field pattern figure of second embodiment on the YZ plane.
Embodiment
Aforementioned and other technology contents, characteristics and effect of the present utility model in the following detailed description that cooperates with reference to two graphic embodiment, can clearly present.
Before the utility model is described in detail, be noted that in the following description content similar or components identical will be represented with identical label.
Consulting shown in Figure 3ly, is first embodiment of the utility model planar printed antenna.Planar printed antenna 3 is to be applied in a wireless communication apparatus, and for example in the wireless network an outpost of the tax office, it mainly includes a circuit substrate 31, one first radiation line segment 32 and one second radiation line segment 33.
The first radiation line segment 32 has one first length, its comprise one by circuit substrate 31 centre towards first long limit 313 straight-line extensions and first antenna part 321 parallel with first minor face 311, one is connected with first antenna part 321 is terminal, and with first antenna part 321 be 90 the degree angles, second antenna part 322 that extends towards first minor face 311 along the first long limit 313, and one are connected with second antenna part 322 is terminal, and with second antenna part 322 be 90 the degree angles, extend near first minor face, 311 central authorities towards the second long limit 314 along first minor face 311, and the third antenna portion 323 parallel with first antenna part 321.
The second radiation line segment 33 has one second length, itself and the first radiation line segment 32 are formed on the circuit substrate 31 symmetrically, therefore, the second radiation line segment 33 include one by circuit substrate 31 centre towards the second long limit, 314 straight-line extensions, and it is parallel with first minor face 311, and four antenna part 331 symmetrical with first antenna part 321, one is connected with the 4th antenna part 331 is terminal, and with the 4th antenna part 331 be 90 the degree angles, extend towards first minor face 311 along the second long limit 314, and with the 5th antenna part 332 of second antenna part, 322 symmetries, and one are connected with the 5th antenna part 332 is terminal, and are 90 degree angles with the 5th antenna part 332, along first minor face 311 towards the first long limit, 313 straight-line extensions extremely near first minor face, 311 central authorities, and parallel with the 4th antenna part 331, and with the 6th antenna part 333 of third antenna portion 323 symmetries.Therefore, the symmetrical expression dipole antenna kenel by first and second radiation line segment 32,33 is constituted can produce resonance at a special frequency channel BW1.
But because conventional dipole antenna need possess the length of the half-wavelength of its resonance band (rate) at least, therefore the function of competence exertion antenna will be printed on conventional dipole antenna on the circuit board that limited area can only be provided, and becomes built-in antenna and be not easy.
So, in the present embodiment, in order to shorten first and second length of first and second Department of Radiation 32,33, by first and second length of first and second Department of Radiation 32,33 and the wavelength X of special frequency channel BW1
1And the dielectric coefficient ε of circuit substrate 31
1Between relational expression:
As can be known, first and second length of first and second Department of Radiation 32,33 is relevant with the medium of circuit substrate 31, that is with the dielectric coefficient ε of circuit substrate 31
1Open radical sign and be inversely proportional to, and with the wavelength X of special frequency channel BW1
1Be directly proportional.Therefore, when special frequency channel BW1 is 2.45GHz, by the dielectric coefficient ε of suitable selection circuit substrate 31
1, first and second length that can dwindle first and second Department of Radiation 32,33 relatively can effectively be dwindled the size of first and second Department of Radiation 32,33, and can be printed on the circuit substrate 31 that limited area only is provided.
And by Fig. 4, planar printed antenna 3 measures voltage standing wave ratio (the Voltage StandingWave Ratio that produces through reality, VSWR) measurement of figure demonstration as can be known, (the voltage standing wave(VSW) ratio in the scope of about 2.4GHz～2.5GHz) all is lower than 2 to planar printed antenna 3, has good radiation efficiency before and after the special frequency channel BW1=2.45GHz.
Again by Fig. 5 and shown in Figure 6, planar printed antenna 3 is at the level and the perpendicular polarization field pattern on XY plane, by Fig. 7 and shown in Figure 8, planar printed antenna 3 is at the level and the perpendicular polarization field pattern on XZ plane, and by Fig. 9 and shown in Figure 10, planar printed antenna 3 at the level on YZ plane and perpendicular polarization field pattern as can be known, planar printed antenna 3 all has good radiation efficiency in all directions, the horizontal polarization on XY plane (Fig. 5) particularly, the perpendicular polarization part of the perpendicular polarization on XZ plane (Fig. 8) and YZ plane (Figure 10) more produces splendid omni-directional (omni-direction) radiation efficiency.
Then, referring to shown in Figure 11, be second embodiment of the utility model planar printed antenna, with first embodiment in the same manner, the first radiation line segment 42 of planar printed antenna 4 and the second radiation line segment 43 are to be formed on symmetrically on the circuit substrate 31, and comprise symmetrical first～third antenna portion 421 respectively, 422, the the 423 and the 4th～the 6th antenna part 431～433, and itself and the first embodiment main difference place are, can provide the area of laying antenna more to have in limited time when 31 of circuit substrates than first embodiment is littler, in order on more limited area, to lay first and second radiation line segment 42,43, as Figure 11～shown in Figure 13, present embodiment is with first and second radiation line segment 42,43 the 3rd and the 6th antenna part 423, line segment 424～427 and 434～437 pluralized in 433 minutes, these line segments 424～427 and 434～437 are laid staggeredly at the laminate up and down 316 of circuit substrate 31 along first minor face 311, on 317, and by on circuit substrate 31, providing complex conduction perforation 318, make to wear layer mode and electrically be connected in series these line segments 424～427 and 434～437, and by the length of these conductive through holes 318, compensate first and second radiation line segment 42, the 43 laying areas because of circuit substrate 31 dwindle the length that shortens, make first and second radiation line segment 42,43 length is under the situation that area dwindles, still can be equivalent to 1/2nd wavelength of special frequency channel BW1=2.45GHz, and can act on the special frequency channel BW1=2.45GHz.
And as shown in figure 14, the planar printed antenna 4 of present embodiment is when reality measures, its voltage standing wave ratio at special frequency channel BW1=2.45GHz place (VSWR) value is not only much smaller than 2, and its voltage standing wave(VSW) ratio to be lower than 2 frequency range (about 2.37GHz～2.62GHz scope is interior) bigger than first embodiment.
Again by Figure 15～shown in Figure 17, be that planar printed antenna 4 is respectively on the XY plane, horizontal polarization and perpendicular polarization field pattern figure that XZ plane and YZ plane measure, wherein display plane printed antenna 4 not only can produce good omni-directional radiation pattern, more particularly, present embodiment is worn the mode of layer up and down by conductive through hole 318, can further improve the perpendicular polarization part (relatively Figure 15 and Fig. 6) of first embodiment on the XY plane, and the horizontal polarization on XZ plane part (relatively Figure 16 and Fig. 7), and the horizontal polarization on YZ plane part (relatively Figure 17 and Fig. 9), make planar printed antenna 4 can produce better radiation pattern.
In sum, the utility model utilizes dipole antenna to have the characteristic of omni-directional field pattern, with dipole antenna by first and second radiation line segment 32 (42), 33 (43) wire laying mode, lay (printing) on circuit substrate 31, and by the dielectric coefficient of suitable selection circuit substrate 31, make by first and second radiation line segment 32 (42), 33 (43) constitute the planar printed antenna 3 of dipole antenna form, 4 can be arranged on the limited area of circuit substrate 31, produce the good radiation pattern and radiation efficiency except reaching, have more advantages such as being easy to manufacturing and low cost.
Claims (10)
1, a kind of planar printed antenna is characterized in that:
This planar printed antenna comprises:
One circuit substrate;
One first radiation line segment is formed on this circuit substrate, has one first length; And
One second radiation line segment is formed on this circuit substrate symmetrically with this-radiation line segment, and has second length identical with this first length, to produce resonance with this-radiation line segment in-special frequency channel.
2, planar printed antenna as claimed in claim 1 is characterized in that: this circuit substrate has a dielectric coefficient, and this dielectric coefficient can make the quarter-wave of this first and second length less than this special frequency channel.
3, planar printed antenna as claimed in claim 2 is characterized in that: this circuit substrate is a FR-4 substrate.
4, planar printed antenna as claimed in claim 2 is characterized in that: the pass of the wavelength of this first and second length and this special frequency channel and the dielectric coefficient of this circuit substrate is:
Wherein this dielectric coefficient is between 4.2～4.7.
5, planar printed antenna as claimed in claim 1 is characterized in that: this special frequency channel is 2.45GHz.
6, planar printed antenna as claimed in claim 1, it is characterized in that: this circuit substrate has one first opposite minor face and one second minor face, and one first opposite long limit and one second long limit, and this first radiation line segment is formed in close this first minor face place of this circuit substrate, its comprise one by this circuit substrate centre towards this first long limit straight-line extension, and first antenna part parallel with this first minor face, one with this first antenna part terminal is connected and is 90 spend angles, and second antenna part that extends towards this first minor face along this first long limit, and one with this second antenna part terminal is connected and is 90 spend angles, extend towards this second long limit along this first minor face, and the third antenna portion parallel with this first antenna part; This second radiation line segment comprise one by this circuit substrate centre towards this second long limit straight-line extension, and it is parallel with this first minor face, and with the 4th antenna part of this first antenna part symmetry, one with the 4th antenna part terminal is connected and is 90 spend angles, extend towards this first minor face along this second long limit, and with the 5th antenna part of this second antenna part symmetry, and one with the 5th antenna part terminal is connected and is 90 spend angles, along this first minor face towards this first long limit straight-line extension, and parallel with the 4th antenna part, and with the 6th antenna part of this third antenna portion symmetry.
7, planar printed antenna as claimed in claim 6, it is characterized in that: the 3rd and the 6th antenna part comprises plural line segment respectively, and these line segments are to be laid staggeredly on the laminate up and down of this circuit substrate along this first minor face, and provide plural number to wear the conductive through hole that layer mode electrically is connected in series these line segments on this circuit substrate.
8, planar printed antenna as claimed in claim 1, it is characterized in that: this planar printed antenna is to be applied in the wireless communication apparatus, and this circuit substrate is the circuit board of this wireless communication apparatus, be laid with a wireless communication line on it, and this first and second radiation line segment and this wireless communication line electric property coupling.
9, planar printed antenna as claimed in claim 8 is characterized in that: this wireless communication apparatus is a wireless network an outpost of the tax office, and this circuit substrate be provided with one with the interface that is connected of this wireless communication line electric property coupling.
10, planar printed antenna as claimed in claim 9 is characterized in that: this connection interface is a USB Port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420093415 CN2750495Y (en) | 2004-09-07 | 2004-09-07 | Planar printed antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420093415 CN2750495Y (en) | 2004-09-07 | 2004-09-07 | Planar printed antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2750495Y true CN2750495Y (en) | 2006-01-04 |
Family
ID=35823871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420093415 Expired - Lifetime CN2750495Y (en) | 2004-09-07 | 2004-09-07 | Planar printed antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2750495Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895011A (en) * | 2010-06-13 | 2010-11-24 | 南京邮电大学 | Wideband printing antenna with symmetrical dipole-antipodal slot line composite structure |
| CN103579742A (en) * | 2012-07-27 | 2014-02-12 | 罗技欧洲公司 | Wireless communications apparatus |
-
2004
- 2004-09-07 CN CN 200420093415 patent/CN2750495Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895011A (en) * | 2010-06-13 | 2010-11-24 | 南京邮电大学 | Wideband printing antenna with symmetrical dipole-antipodal slot line composite structure |
| CN101895011B (en) * | 2010-06-13 | 2013-04-10 | 南京邮电大学 | Wideband printing antenna with symmetrical dipole-antipodal slot line composite structure |
| CN103579742A (en) * | 2012-07-27 | 2014-02-12 | 罗技欧洲公司 | Wireless communications apparatus |
| CN103579742B (en) * | 2012-07-27 | 2016-08-10 | 罗技欧洲公司 | Wireless Telecom Equipment |
| US9844149B2 (en) | 2012-07-27 | 2017-12-12 | Logitech Europe S.A. | Wireless communications antenna assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140907 Granted publication date: 20060104 |