CN101090290A - Plough time service integral receive antenna - Google Patents
Plough time service integral receive antenna Download PDFInfo
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- CN101090290A CN101090290A CN 200610017970 CN200610017970A CN101090290A CN 101090290 A CN101090290 A CN 101090290A CN 200610017970 CN200610017970 CN 200610017970 CN 200610017970 A CN200610017970 A CN 200610017970A CN 101090290 A CN101090290 A CN 101090290A
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- low noise
- time service
- noise amplifier
- antenna
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Abstract
This invention discloses a Beidou passive timming type receiving antenna including a microband antenna, a protection circuit, a first stage low noise amplifying circuit, a bandpass filter circuit and a second stage low noise amplifying circuit, in which, the microband antenna is connected to the protection circuit, which is connected to the first stage low noise amplifying circuit, the output of which is connected to the medium filter to be connected with the second stage amplifying circuit. Advantages: receiving in one-way, no limit to users, less sensitivity in receiving signals, small time delay, active antenna and coaxial feed.
Description
Technical field
The present invention relates to a kind of reception antenna, especially relate to a kind of plough time service integral receive antenna.
Background technology
Beidou satellite navigation and positioning system is the navigation positioning system that has China's independent intellectual property right, can compare favourably with GPS of USA and Muscovite GLONASS.The at present domestic used gps system that is mainly, the application product of the dipper system of China's independent intellectual property right is few, even in having Big Dipper product, is mainly the two-way main product of orientating as.
At present, also there is not the radio-frequency (RF) Receiving Device that is specifically designed to Big Dipper time service user's request, be mainly product based on the radio-frequency unit of Big Dipper navigation positioning system,, cause this class number of users can not be too many because there is restriction in dipper system to two-way number of users based on two-way position application.Consider the potential safety hazard that adopts GPS, the dipper system of China's independent intellectual property right has very big market potential, but the two-way operation mechanism of dipper system, serious restriction the quantity and the Big Dipper application development of Big Dipper customer group.
Simultaneously, the time delay of the bi-directional RF device receiving satellite signal that is used to locate is big and consistency is poor, can not satisfy the requirement of time service type user to precision, and time service precision generally requires less than 100ns, or lower.
Summary of the invention
Purpose of the present invention just is to the demand that satisfies the time service type user, strengthens application, raising time service precision, the increase Big Dipper number of users of Beidou satellite navigation and positioning system in high accuracy time service field, thereby a kind of Big Dipper time service model integral receive antenna is provided.
Purpose of the present invention can realize by following measure:
The present invention includes microstrip antenna, protective circuit, first order low noise amplifier circuit, bandwidth-limited circuit, second level low noise amplifier circuit; Wherein, microstrip antenna is connected to λ/4 protective circuits, and λ/4 protective circuits are connected to first order low noise amplifier circuit, and the output of first order low noise amplifier circuit is connected to dielectric filter, and dielectric filter is connected to second level low noise amplifier circuit.
Bandwidth-limited circuit is dielectric filter or SAW (Surface Acoustic Wave) filter or LC filter etc. among the present invention.Protective circuit is a lightning protection circuit, as adopting λ/4 protective circuits.
The present invention has plurality of advantages owing to adopt said structure and circuit design, and the test performance index shows below:
1) operating frequency: 2491.75 ± 4.08MHz
2) polarization: right-handed circular polarization
3) axial ratio :≤2dB
4) microstrip antenna gain: 〉=2dB (10 °～75 °)
5) LNA gain and: 〉=30dB
6) voltage standing wave ratio (VSWR) :≤1.5: 1
7) bandwidth: 〉=30MHz
8) equivalent noise temperature :≤240K
9) noise factor :≤1.5dB
10) antenna footprint: east longitude 80-140 degree
11) antenna elevation angle: 20～70 degree
12) receiving signal sensitivity :-157.6dBW
13) operating voltage: 4.5 ~ 5.5V
14) operating current :≤30mA
15) output impedance: 50 Ω
16) working temperature :-40 ℃～+ 85 ℃
Can find out that from These parameters etc. its advantage is as follows:
1, unidirectional reception, Big Dipper number of users is unrestricted;
2, receiving signal sensitivity height, time delay is little, and high conformity is applicable to the time service type satellite receiver;
3, active antenna adopts coaxial feed, and is easy to use;
4, gain is high, noise factor is low, and feeder support length can reach 50 meters;
5, integrated design, volume is little, weight is low, the convenient installation; Have lightning protection, safe and reliable.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
The present invention does with detailed description below in conjunction with drawings and Examples:
Embodiment 1,
As shown in the figure, the present invention includes microstrip antenna, protective circuit, first order low noise amplifier circuit, bandwidth-limited circuit, second level low noise amplifier circuit; Wherein, microstrip antenna is connected to λ/4 protective circuits, and λ/4 protective circuits are connected to first order low noise amplifier circuit, and the output of first order low noise amplifier circuit is connected to dielectric filter, and dielectric filter is connected to second level low noise amplifier circuit.Bandwidth-limited circuit is a dielectric filter among the present invention.Protective circuit is a lightning protection circuit.
Specifically: plough time service integral receive antenna is the radio-frequency (RF) Receiving Device in a kind of satellite navigation location of communication system, has adopted little band to receive the mode of antenna and the integrated installation sealing of low noise amplifier, to reduce total noise of centrifuge.The good and bad receptivity that influences entire equipment of the technical indicator of antenna.Reception antenna mainly comprises 2 parts altogether: microstrip antenna, low noise amplifier.
Plough time service integral receive antenna is applicable to the Big Dipper generation satellite navigation and location system based on China's independent intellectual property right, is a unidirectional reception antenna, is mainly used in Big Dipper time service type receiver.
Wherein, the low noise amplifier design principle is as follows:
According to the requirement of integral antenna gain greater than 30dB, adopt two-stage to amplify, between amplifying, two-stage adopt filter to carry out filtering, and come inhibition zone to disturb outward.
Adopt the mode of coaxial feed in the design, make with equipment to be connected simply concrete implementation method: output signal adopts electric capacity after directly, and the use inductance is introduced LNA with direct current.
Factors such as consideration induction thunder are to the damage of LNA; adopt 1/4 wavelength high impedance microstrip line and ground short circuit to carry out lightning protection in the design; the specific implementation method: any place of promptly importing microstrip line at input signal is drawn a high impedance microstrip line ground connection again; microstrip line length equals 1/4 effective medium wavelength, and attention can not influence the impedance operator of original microstrip line.
Wherein, the Design of Bandpass principle is as follows:
Design of Filter has SAW (Surface Acoustic Wave) filter, LC filter and dielectric filter usually.Because integral antenna is used for the time service type receiver module, to the time delay of radio-frequency channel and coherence request than higher.
The SAW (Surface Acoustic Wave) filter time delay varies with temperature bigger, can not guarantee the consistency of total temperature scope time delay;
The LC filter at the 2491.75MHz place to requirement on devices than higher, the debugging comparison difficulty of getting up simultaneously, realize that the consistency of time delay must be carried out strict screening to device, is not suitable for volume production.
The temperature characterisitic of dielectric filter is relatively good, and can guarantee the consistency of time delay when producing in batches.Therefore, the design mainly adopts dielectric filter to realize.
In addition, also can adopt microstripline filter, though the microstripline filter performance is relatively good, this class filter is difficult design not only, and it is bigger to take the PCB area, uncomfortable miniaturization Design.
Dielectric filter adopts DFC2492P20A, and parameter is as follows:
| Centre frequency (fo) | 2491.50MHz | ±1.5MHz |
| Insert loss | ≤3.0dB | ±0.5dB |
| Pass band width | fo±10.0MHz | ±0.5MHz |
| Passband fluctuation | ≤1.0dB | ±0.5dB |
| Standing-wave ratio | ≤2.0 | ±0.5 |
| Stopband attenuation (absolute value) | ≥30dB | ±2dB |
| Maximal input | 1W | |
| The I/O impedance | 50Ω |
Embodiment 2,
As shown in the figure, the present invention includes microstrip antenna, protective circuit, first order low noise amplifier circuit, bandwidth-limited circuit, second level low noise amplifier circuit; Wherein, microstrip antenna is connected to λ/4 protective circuits, and λ/4 protective circuits are connected to first order low noise amplifier circuit, and the output of first order low noise amplifier circuit is connected to dielectric filter, and dielectric filter is connected to second level low noise amplifier circuit.Bandwidth-limited circuit is a SAW (Surface Acoustic Wave) filter among the present invention.Protective circuit adopts λ/4 protective circuits.Other are with embodiment 1.
Embodiment 3,
As shown in the figure, the present invention includes microstrip antenna, protective circuit, first order low noise amplifier circuit, bandwidth-limited circuit, second level low noise amplifier circuit; Wherein, microstrip antenna is connected to λ/4 protective circuits, and λ/4 protective circuits are connected to first order low noise amplifier circuit, and the output of first order low noise amplifier circuit is connected to dielectric filter, and dielectric filter is connected to second level low noise amplifier circuit.Bandwidth-limited circuit is a LC filter etc. among the present invention.Protective circuit is a lightning protection circuit.Other are with embodiment 1.
Claims (6)
1, a kind of plough time service integral receive antenna is characterized in that: it comprises microstrip antenna, protective circuit, first order low noise amplifier circuit, bandwidth-limited circuit, second level low noise amplifier circuit; Wherein, microstrip antenna is connected to protective circuit, and protective circuit is connected to first order low noise amplifier circuit, and the output of first order low noise amplifier circuit is connected to dielectric filter, and dielectric filter is connected to second level low noise amplifier circuit.
2, plough time service integral receive antenna according to claim 1 is characterized in that: described bandwidth-limited circuit is a dielectric filter.
3, plough time service integral receive antenna according to claim 1 is characterized in that: described bandwidth-limited circuit is a SAW (Surface Acoustic Wave) filter.
4, plough time service integral receive antenna according to claim 1 is characterized in that: described bandwidth-limited circuit is the LC filter.
5, according to claim 1 or 2 or 3 or 4 described plough time service integral receive antennas, it is characterized in that: described protective circuit is a lightning protection circuit.
6, according to claim 1 or 2 or 3 or 4 described plough time service integral receive antennas, it is characterized in that: described protective circuit is λ/4 protective circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610017970 CN101090290A (en) | 2006-06-16 | 2006-06-16 | Plough time service integral receive antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610017970 CN101090290A (en) | 2006-06-16 | 2006-06-16 | Plough time service integral receive antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101090290A true CN101090290A (en) | 2007-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610017970 Pending CN101090290A (en) | 2006-06-16 | 2006-06-16 | Plough time service integral receive antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403898A (en) * | 2015-12-03 | 2016-03-16 | 天津七六四通信导航技术有限公司 | Radio frequency receiving channel circuit for realizing anti-interference antenna of satellite navigation and method |
| CN106383359A (en) * | 2016-11-22 | 2017-02-08 | 丹阳伦图电子技术有限公司 | GLONASS positioning device for cableway compartment broadcasting |
| CN111538040A (en) * | 2020-04-17 | 2020-08-14 | 河北晶禾电子技术股份有限公司 | Beidou navigation antenna |
-
2006
- 2006-06-16 CN CN 200610017970 patent/CN101090290A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403898A (en) * | 2015-12-03 | 2016-03-16 | 天津七六四通信导航技术有限公司 | Radio frequency receiving channel circuit for realizing anti-interference antenna of satellite navigation and method |
| CN105403898B (en) * | 2015-12-03 | 2017-12-19 | 天津七六四通信导航技术有限公司 | A kind of radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation |
| CN106383359A (en) * | 2016-11-22 | 2017-02-08 | 丹阳伦图电子技术有限公司 | GLONASS positioning device for cableway compartment broadcasting |
| CN111538040A (en) * | 2020-04-17 | 2020-08-14 | 河北晶禾电子技术股份有限公司 | Beidou navigation antenna |
| CN111538040B (en) * | 2020-04-17 | 2021-06-22 | 河北晶禾电子技术股份有限公司 | Beidou navigation antenna |
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Open date: 20071219 |