CN207474663U - A kind of omni-directional plane antenna for inhibiting harmonic wave - Google Patents
A kind of omni-directional plane antenna for inhibiting harmonic wave Download PDFInfo
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- CN207474663U CN207474663U CN201721413278.7U CN201721413278U CN207474663U CN 207474663 U CN207474663 U CN 207474663U CN 201721413278 U CN201721413278 U CN 201721413278U CN 207474663 U CN207474663 U CN 207474663U
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- harmonic wave
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Abstract
A kind of omni-directional plane antenna for inhibiting harmonic wave, including：Medium substrate, metal radiation patch, feeding network, parasitic metal patch.Wherein metal radiation patch is is made of the antenna of two L-type metal arms, and respectively there are one rectangle parasitic metal patch at two dog-ears of L-type metal arm, feeding network is fed for parallel difference feed line.The design can realize approximate sphericity antenna pattern, and both antenna radiation pattern was respectively smaller to gain fluctuation, improve antenna respectively to radiation and receiving ability, while improve antenna harmonics restraint degree.
Description
Technical field
The utility model is related to microwave antenna, more particularly to compound password card vehicle-mounted in electronic toll system for road
(CPC) antenna applied in.
Background technology
There is charge (including electronic charging system without parking (ETC) and manual toll collection system (MTC)) in toll on the road and bridge's system
There are the situation of two or more driving path, i.e. ambiguity path between the Liang Ge charge stations of network of highways.ETC or MTC
Vehicle needs roadside unit (RSU) the progress information exchange using CPC cards and ID of trace route path point when passing through turn pike, and by road
Diameter information write-in CPC is preserved.
CPC cards need to receive by omnidirectional antenna or send buying signals, while inhibit the transmitting of harmonic signal, therefore
The performance indicator of antenna directly affects the realization of the communication technology index of CPC cards.
According to CPC card usage scenarios, usually require that antenna that CPC cards use have good three-dimensional omnidirectional's characteristic and
Good harmonic responses.Since three-dimensional omni-directional monopole antenna realizes difficult, generally common half-wavelength doublet antenna, the type
Antenna disadvantage is antenna radiation pattern there are zero, the CPC when antenna null and zero crossings region face RSU antennas
It can not receive or emit buying signals, cause Fail Transaction；Simultaneously because require CPC cards that there is harmonic inhibition capability, because
Larger harmonic radiation energy can interfere CPC cards in itself or interference other systems, and system is caused to can not work normally.
Utility model content
The purpose of this utility model is to provide it is a kind of inhibit harmonic wave omni-directional plane antenna, the antenna improve antenna with
The integrated level of system, improve it is each to radiation with receive signal ability, improve harmonic restraining function.
The utility model provides a kind of omni-directional plane antenna for inhibiting harmonic wave, including：Metal radiation patch, transmission network
Network, medium substrate, parasitic metal patch, wherein：
The metal radiation patch is located at the upper surface of medium substrate.
The parasitic metal patch is located at the upper surface of medium substrate.
Optionally, the feeding network is parallel difference feed line, and line width is between 0.1mm-10mm, and line length is in 0.1mm-
Between 20mm.
Optionally, the metal radiation patch is made of two L-type metal arms.
Optionally, the length perpendicular to feed line of the L-type metal arm between 3mm-50mm, put down by L-type metal arm
The capable length in feed line is between 0.1mm-50mm.
Optionally, the length of the metallic parasitic patch is between 0.1mm-20mm, and width is between 0.1mm-20mm.
Optionally, the thickness of the medium substrate is between 0.1mm-10mm.
The beneficial effects of the utility model are, using the antenna in CPC cards, can realize the three-dimensional omnidirectional of directional diagram
Property, i.e. gain fluctuation in all directions is less than 3dB, improves the environmental suitabilities of CPC cards, can realize various positions, respectively
The good receiving and transmitting signal of kind angle improves the transaction success rate of CPC cards；It can reduce harmonic wave using the antenna in CPC cards simultaneously
Radiation energy, system interference problem caused by reducing harmonic radiation.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Attached drawing is briefly described needed in description.
Fig. 1 is the stereogram of the omni-directional plane antenna of a kind of inhibition harmonic wave that the utility model embodiment is related to.
Fig. 2 is the working frequency and harmonic wave of a kind of omni-directional plane antenna of inhibition harmonic wave that the utility model embodiment is related to
The directional diagram of frequency.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that described embodiment is only the reality of the utility model part of the embodiment rather than whole
Apply example.
The omni-directional plane antenna of a kind of inhibition harmonic wave of the embodiment, applied in the compound password card systems of CPC, such as Fig. 1
Shown, 101 be medium substrate, and 102 be metal radiation patch, and 103 be feeding network, and 104 be parasitic metal patch.
The working frequency of the antenna is 5.8GHz, adjusts the structural parameters of antenna, the performance of antenna is optimized.Its
In, the length of medium substrate 101 is 20mm, width 25mm, thickness 0.8mm, the L-type metal arm of metal radiation patch 102
The length for being parallel to feed line is 5.35mm, and width 5.1mm, L-type metal arm is 6.5mm perpendicular to the length of feed line, wide
It spends for 11.5mm, the length of feeding network 103 is 2mm, and width 0.25mm, the length of parasitic metal patch 104 is 6mm, wide
It spends for 2mm.
As seen from Figure 2, the work of the omni-directional plane antenna of a kind of inhibition harmonic wave that the utility model embodiment is related to
Frequency direction figure (black solid line) is almost a circle, i.e., it is each to gain fluctuation maximum value be 1.2dB, reached omnidirectional's requirement；Together
When can be seen that directional diagram (black dotted line) maximum value of harmonic wave is much smaller than the maximum value of working frequency, harmonic suppression effect reaches
16.6dB realizes good harmonics restraint index.
It should be noted that a kind of omni-directional plane antenna with harmonics restraint provided by the utility model, metal radiation
The L-type metal arm of patch 102 is not limited to symmetrical structure, may be set to be unsymmetric structure, the knot of parasitic metal patch 104
Configuration formula is not limited to symmetrical structure, or unsymmetric structure, shape may be set to be triangle, circle etc., parasitic
Metal patch 104 can also be changed to the unfilled corner form at L-type metal arm dog-ear.Those skilled in the art can be according to specifically used
It is required that the suitable radiation patch shape of selection, the utility model do not limit.
On the other hand, a kind of omni-directional plane antenna with harmonics restraint provided by the utility model, is applicable not only to CPC cards
Antenna Design, be also applied for the application scenario of any required omnidirectional antenna.Those skilled in the art can be according to specifically used
Scene selects suitable antenna form, and the utility model does not limit.
Although being described in conjunction with the accompanying the embodiment of the utility model, those skilled in the art can not depart from
Various modifications and variations are made in the case of the spirit and scope of the utility model, such modifications and variations have each fallen within appended
Within claim limited range.
Claims (7)
1. a kind of omni-directional plane antenna for inhibiting harmonic wave, which is characterized in that including：Medium substrate, metal radiation patch, transmission network
Network, parasitic metal patch, wherein：
The metal radiation patch is located at the upper surface of medium substrate；
The parasitic patch is located at the upper surface of medium substrate.
2. the omni-directional plane antenna according to claim 1 for inhibiting harmonic wave, which is characterized in that
The feeding network be parallel difference feed line, line width between 0.1mm-10mm,
Line length is between 0.1mm-20mm.
3. the omni-directional plane antenna according to claim 1 for inhibiting harmonic wave, which is characterized in that
The metal radiation patch is made of two L-type metal arms.
4. the omni-directional plane antenna according to claim 3 for inhibiting harmonic wave, which is characterized in that
Between 3mm-50mm, L-type metal arm is parallel to feed line for the length perpendicular to feed line of the L-type metal arm
Length is between 0.1mm-50mm.
5. the omni-directional plane antenna according to claim 3 for inhibiting harmonic wave, which is characterized in that
There are one rectangle parasitic patch respectively at two dog-ears of the L-type metal arm.
6. the omni-directional plane antenna according to claim 5 for inhibiting harmonic wave, which is characterized in that
The length of the metallic parasitic patch is between 0.1mm-20mm, and width is between 0.1mm-20mm.
7. the omni-directional plane antenna according to claim 1 for inhibiting harmonic wave, which is characterized in that
The thickness of the medium substrate is between 0.1mm-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721413278.7U CN207474663U (en) | 2017-10-30 | 2017-10-30 | A kind of omni-directional plane antenna for inhibiting harmonic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721413278.7U CN207474663U (en) | 2017-10-30 | 2017-10-30 | A kind of omni-directional plane antenna for inhibiting harmonic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207474663U true CN207474663U (en) | 2018-06-08 |
Family
ID=62265471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721413278.7U Active CN207474663U (en) | 2017-10-30 | 2017-10-30 | A kind of omni-directional plane antenna for inhibiting harmonic wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207474663U (en) |
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2017
- 2017-10-30 CN CN201721413278.7U patent/CN207474663U/en active Active
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