CN203983448U - A kind of Monobrachial spiral antenna - Google Patents
A kind of Monobrachial spiral antenna Download PDFInfo
- Publication number
- CN203983448U CN203983448U CN201420382342.XU CN201420382342U CN203983448U CN 203983448 U CN203983448 U CN 203983448U CN 201420382342 U CN201420382342 U CN 201420382342U CN 203983448 U CN203983448 U CN 203983448U
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- amplifier
- circuit board
- post
- spiral antenna
- antenna
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The utility model discloses a kind of Monobrachial spiral antenna, comprise a circuit board, be located at metallic shield on circuit board, be welded on PCB end copper post, be located at the impedance matching medium between copper post and circuit board, the helical antenna being connected with circuit board through described copper post, medium.The utility model is simple in structure, and superior performance has realized the simplification of helical antenna.
Description
Technical field
The utility model relates to the parts of guider, relate in particular to on navigation product for receiving the spiral omnidirectional antenna of various satellite-signals.
Background technology
Existing navigation product, in the time of receiving satellite signal, all adopts four-arm spiral antenna, and quadrifilar helical antenna is generally set on cylindrical substrate by four metal wires by ad hoc rules bending.It possesses the characteristic that has Zapper antenna, also possesses the characteristic that has vertical antenna.This kind be structure cleverly, makes any direction of antenna have the gain of 3dB, and pattern characteristics is good.Quadrifilar helical antenna has the receiving ability to 360 degree comprehensively, therefore in the time that PDA is combined, regardless of the putting position of PDA, quadrifilar helical antenna all can receive, but its size of four-arm spiral antenna is larger, and structure relative complex, assembling and maintenance all very bother, and production cost is relatively high.
Summary of the invention
The utility model is in order to solve the technical problem existing in above-mentioned prior art, a kind of Monobrachial spiral antenna is proposed, comprise a circuit board, be located at metallic shield on circuit board, be welded on PCB end copper post, be located at the impedance matching medium between copper post and circuit board, the helical antenna being connected with circuit board through described copper post, medium.
Preferably, described impedance matching medium adopts polytetrafluoroethylene to make, and helical antenna load impedance is matched to 50 ohm.
Preferably, described metallic shield adopts iron or foreign copper-nickel alloy to make.
The utility model is simple in structure, easy to assembly, has accomplished that performance and four-arm spiral antenna are suitable, and its cost reduces greatly, has realized miniaturization, can be applied to the navigation product of needles of various sizes, and market prospects are very extensive.
Brief description of the drawings
Fig. 1 is the first schematic perspective view of the present utility model;
Fig. 2 is the second schematic perspective view of the present utility model;
Fig. 3 is circuit block diagram of the present utility model;
Fig. 4 is the resolution chart under frequency range 1561MHz of the present utility model;
Fig. 5 is the resolution chart under frequency range 1574.8MHz of the present utility model;
Fig. 6 is the resolution chart under frequency range 1607MHz of the present utility model;
Fig. 7 is the resolution chart under frequency range 1600MHz of the present utility model.
Embodiment
As shown in Figure 1 to Figure 2, the Monobrachial spiral antenna that the utility model one embodiment provides, is mainly made up of circuit board 1, metallic shield 2, impedance matching medium 3, copper post 4, helical antenna 5.
Circuit board is provided with multiple electronic devices and components, metallic shield covers on circuit board, cover all electronic devices and components, circuit board can be isolated from the outside, avoid signal to disturb, one end of circuit board is provided with impedance matching medium, this impedance matching medium is for being matched to 50 ohm by the load impedance of helical antenna, make it can be corresponding with the source impedance on circuit board, a bronze medal post is also being welded in the one end that is provided with impedance matching medium at circuit board, this copper post is clamped in impedance matching medium between copper post and circuit board end, helical antenna is connected with circuit board through copper post and impedance matching medium.
In the present embodiment, impedance matching medium adopts polytetrafluoroethylene to make, and metallic shield adopts iron or foreign copper-nickel alloy to make.
As shown in Figure 3, circuit board comprises pre-amplifier, post-amplifier, be arranged on filter between pre-amplifier and post-amplifier, provide the power supply of electric power for pre-amplifier and post-amplifier, pre-amplifier is connected with helical antenna, then filter carries out filtering to the signal of pre-amplifier, strengthen outside and suppress, more than 100MHz suppresses to reach 45dB, have good antijamming capability, post-amplifier amplifies filtered signal, then exports by output port.Wherein, pre-amplifier adopts low noise amplifier, and the noise of the signal after pre-amplifier amplifies is less than 1.5dB.The Voltage-output standing-wave ratio of post-amplifier output is less than 1.5dB.
As shown in Figures 4 to 7, the utility model has carried out respectively the test of four channels (1561MHz, 1574.8MHz, 1607MHz, 1600MHz) to Monobrachial spiral antenna, pass through test result, can find that Monobrachial spiral antenna of the present utility model is suitable with its performance of existing four-arm spiral antenna, can meet the use of various navigation products.
Above specific embodiment is only in order to illustrate structure of the present utility model, and those of ordinary skill in the art can make various deformation and variation under design of the present utility model, and these distortion and variation include within protection range of the present utility model.
Claims (6)
1. a Monobrachial spiral antenna, is characterized in that: comprise a circuit board, be located at metallic shield on circuit board, be welded on PCB end copper post, be located at the impedance matching medium between copper post and circuit board, the helical antenna being connected with circuit board through described copper post, impedance matching medium.
2. Monobrachial spiral antenna as claimed in claim 1, is characterized in that: described impedance matching medium adopts polytetrafluoroethylene to make, and helical antenna load impedance is matched to 50 ohm.
3. Monobrachial spiral antenna as claimed in claim 1, is characterized in that: described metallic shield adopts iron or foreign copper-nickel alloy to make.
4. Monobrachial spiral antenna as claimed in claim 1, is characterized in that: described circuit board comprises the pre-amplifier that is connected with helical antenna, the signal of pre-amplifier is carried out the filter of filtering, the post-amplifier that filtered signal is amplified, the output port being connected with post-amplifier, provides the power module of power supply for prime, post-amplifier.
5. Monobrachial spiral antenna as claimed in claim 4, is characterized in that: described pre-amplifier adopts low noise amplifier, and the noise of the signal after pre-amplifier amplifies is less than 1.5dB.
6. Monobrachial spiral antenna as claimed in claim 4, is characterized in that: the Voltage-output standing-wave ratio of described post-amplifier output is less than 1.5dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420382342.XU CN203983448U (en) | 2014-07-11 | 2014-07-11 | A kind of Monobrachial spiral antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420382342.XU CN203983448U (en) | 2014-07-11 | 2014-07-11 | A kind of Monobrachial spiral antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203983448U true CN203983448U (en) | 2014-12-03 |
Family
ID=51980870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420382342.XU Expired - Fee Related CN203983448U (en) | 2014-07-11 | 2014-07-11 | A kind of Monobrachial spiral antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203983448U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638424A (en) * | 2018-12-19 | 2019-04-16 | 航天恒星科技有限公司 | A kind of miniaturization Monobrachial spiral antenna |
-
2014
- 2014-07-11 CN CN201420382342.XU patent/CN203983448U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638424A (en) * | 2018-12-19 | 2019-04-16 | 航天恒星科技有限公司 | A kind of miniaturization Monobrachial spiral antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20200711 |