CN204719226U - A kind of double-channel amplitude-comparison direction finding system - Google Patents
A kind of double-channel amplitude-comparison direction finding system Download PDFInfo
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- CN204719226U CN204719226U CN201520409916.2U CN201520409916U CN204719226U CN 204719226 U CN204719226 U CN 204719226U CN 201520409916 U CN201520409916 U CN 201520409916U CN 204719226 U CN204719226 U CN 204719226U
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Abstract
The utility model discloses a kind of double-channel amplitude-comparison direction finding system, comprise: receiving cable I, receiving cable II, directional antenna, omnidirectional antenna, electronic compass and processor, described directional antenna is connected with receiving cable I, omnidirectional antenna is connected with receiving cable II, described processor is connected with receiving cable I, receiving cable II and electronic compass respectively, and described directional antenna, omnidirectional antenna and electronic compass all rotate with same angular velocity.Do not transmitted fluctuating, radio wave propagation fluctuating etc. of the utility model affects, and improves the direction finding precision of signal.
Description
Technical field
The utility model relates to radio monitoring field, particularly relates to a kind of semi-automatic radio direction-finding system.
Background technology
Radio direction finding (RDF) refers to the incoming wave orientation utilizing radio direction finding measuring equipment to measure target signal source.The general estimation in amplitude direction finding method, phase place direction finding method and space three kinds can be divided into according to direction-finding method.
Amplitude of vibration method direction finding research is the earliest, most widely used.During direction finding, antenna rotates a circle or equivalent rotary one week, and the maximum direction of direction-finder set output signal strength is showing to degree of target emanation source.
Simple, the easy realization of amplitude of vibration method direction-finding equipment structure, low cost of manufacture, the Amplitude Ratio of different directions signal is easily measured, and frequency change is less on systematic survey impact.
But in amplitude of vibration method direction finding, Received signal strength rises and falls because transmitting and rises and falls, and easily affect by reflection, refraction etc., when monitoring weak signal, Amplitude Ratio difficulty is handed over large, and direction finding precision is not high.
Such as, application number is the utility model " electronic compass is the radio direction-finding system of angle gauge " of CN200920081496, disclose the radio direction-finding system that electronic compass is angle gauge, achieve the function utilizing radio monitoring equipment to carry out semi-automatic radio direction finding (RDF), but this system acceptance signal rises and falls because transmitting and rises and falls, easily receive reflection, refractive effect in direction finding process, direction finding precision is not high.
Utility model content
The purpose of this utility model is to overcome the impact of existing direction-finding system Received signal strength by reflection, refraction, eliminates the fluctuations of signal in direction finding process, proposes a kind of double-channel amplitude-comparison direction finding system.Do not transmitted fluctuating, radio wave propagation fluctuating etc. of the utility model affects, and improves the direction finding precision of signal.
The utility model realizes by the following technical solutions:
A kind of double-channel amplitude-comparison direction finding system, is characterized in that comprising:
For the receiving cable I that receives radio signals and receiving cable II;
For obtaining directional antenna and the omnidirectional antenna of radio signal;
For obtaining receiving antenna direction, azimuthal electronic compass that this direction of Real-time Obtaining is corresponding;
For the treatment of the Received signal strength of receiving cable I and receiving cable II, and calculate the processor of arrival bearing;
Described directional antenna is connected with receiving cable I, and omnidirectional antenna is connected with receiving cable II, and described processor is connected with receiving cable I, receiving cable II and electronic compass respectively, and described directional antenna, omnidirectional antenna and electronic compass all rotate with same angular velocity.
The Research of Antenna Polarization of described directional antenna is identical with the Research of Antenna Polarization of omnidirectional antenna.
The Research of Antenna Polarization is divided into three major types: linear polarization, elliptical polarization, circular polarisation.Wherein, linear polarization is divided into again horizontal polarization and vertical polarization, and elliptical polarization can be divided into left-hand elliptical polarization and Right-hand elliptical polarization again, and circular polarisation can be divided into left-hand circular polarization and right-handed circular polarization again.
The antenna gain of described directional antenna is higher than the antenna gain of omnidirectional antenna.
Antenna gain refers to: under the condition that power input is equal, the ratio of the power density of the signal that actual antennas produces at same point place, space with desirable radiating element.
Described directional antenna is loaded ring antenna or log-periodic antenna.
Principle of work:
Processor is after receiving cable I and passage II signal, if passage I received signal strength is more than or equal to passage II received signal strength, then output signal is subtracted each other for passage I Received signal strength and passage II Received signal strength; If passage I received signal strength is less than passage II received signal strength, then exporting is zero; The direction finding direction that direction-finding system exports is direction corresponding to output signal strength maximal value.
Compared with prior art, its advantage is the utility model:
1, structure of the present utility model is simple, easy to operate, and low cost of manufacture.
2, the utility model is adapted to measure horizontal polarization and vertical polarization signal, and measurement range is wide.
3, the utility model directional antenna adopts loaded ring antenna or log-periodic antenna, and have higher gain, direction finder sensitivity is high.
4, the utility model uses omnidirectional's reference channel to offset signal amplitude fluctuating, and do not transmitted fluctuating, radio wave propagation fluctuating etc. affect, and direction finding is accurately high.
5, the utility model direction-finder antenna rotates a circle and can complete direction finding, and direction finding speed is fast.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Reference numeral: 1, directional antenna, 2, omnidirectional antenna, 3, receiving cable I, 4, receiving cable II, 5, electronic compass, 6, processor.
Embodiment
Below in conjunction with Figure of description, the present invention is further detailed:
Embodiment 1:
A kind of double-channel amplitude-comparison direction finding system, comprising:
For the receiving cable I 3 that receives radio signals and receiving cable II 4;
For obtaining directional antenna 1 and the omnidirectional antenna 2 of radio signal;
For obtaining receiving antenna direction, azimuthal electronic compass 5 that this direction of Real-time Obtaining is corresponding;
For the treatment of the Received signal strength of receiving cable I 3 and receiving cable II 4, and calculate the processor 6 of arrival bearing;
Described directional antenna 1 is connected with receiving cable I 3, omnidirectional antenna 2 is connected with receiving cable II 4, described processor 6 is connected with receiving cable I 3, receiving cable II 4 and electronic compass 5 respectively, and described directional antenna 1, omnidirectional antenna 2 and electronic compass 5 all rotate with same angular velocity.
In the utility model, described directional antenna 1 is the directional antenna of vertical polarization, and omnidirectional antenna 2 is the omnidirectional antenna of vertical polarization.
In the utility model, the antenna gain of described directional antenna 1 is higher than the antenna gain of omnidirectional antenna 2.
In the utility model, described directional antenna 1 is loaded ring antenna, and the antenna gain of omnidirectional antenna 2 is identical with the gain of loaded ring antenna episternites.
The utility model adopts two-channel receiver to form binary channels in use, and two channel interfaces on two-channel receiver access directional antenna 1 and omnidirectional antenna 2 respectively; Structure is simple, easy to operate, and low cost of manufacture.
Embodiment 2:
A kind of double-channel amplitude-comparison direction finding system, comprising:
For the receiving cable I 3 that receives radio signals and receiving cable II 4;
For obtaining directional antenna 1 and the omnidirectional antenna 2 of radio signal;
For obtaining receiving antenna direction, azimuthal electronic compass 5 that this direction of Real-time Obtaining is corresponding;
For the treatment of the Received signal strength of receiving cable I 3 and receiving cable II 4, and calculate the processor 6 of arrival bearing;
Described directional antenna 1 is connected with receiving cable I 3, omnidirectional antenna 2 is connected with receiving cable II 4, described processor 6 is connected with receiving cable I 3, receiving cable II 4 and electronic compass 5 respectively, and described directional antenna 1, omnidirectional antenna 2 and electronic compass 5 all rotate with same angular velocity.
In the utility model, described directional antenna 1 is the directional antenna of vertical polarization, and omnidirectional antenna 2 is the omnidirectional antenna of vertical polarization.
In the utility model, the antenna gain of described directional antenna 1 is higher than the antenna gain of omnidirectional antenna 2.
In the utility model, described directional antenna 1 is log-periodic antenna.
The utility model adopts two single-channel receivers to form binary channels in use, and two single-channel receivers access directional antenna 1 and omnidirectional antenna 2 respectively; Structure is simple, easy to operate, and low cost of manufacture.
Embodiment 1,2 is in direction finding process:
First, manual rotation double-channel amplitude-comparison direction finding system rotates a circle with certain sweep velocity;
Then, in rotary course, processor is after receiving cable I and passage II signal, if passage I received signal strength is more than or equal to passage II received signal strength, then output signal is subtracted each other for passage I Received signal strength and passage II Received signal strength; If passage I received signal strength is less than passage II received signal strength, then exporting is zero;
Finally, after rotation completes, the direction finding direction that double-channel amplitude-comparison direction finding system exports is that output signal strength is maximum
Value correspondence direction.
Claims (4)
1. a double-channel amplitude-comparison direction finding system, is characterized in that comprising:
For the receiving cable I (3) that receives radio signals and receiving cable II (4);
For obtaining directional antenna (1) and the omnidirectional antenna (2) of radio signal;
For obtaining receiving antenna direction, azimuthal electronic compass (5) that this direction of Real-time Obtaining is corresponding;
For the treatment of the Received signal strength of receiving cable I (3) and receiving cable II (4), and calculate the processor (6) of arrival bearing;
Described directional antenna (1) is connected with receiving cable I (3), omnidirectional antenna (2) is connected with receiving cable II (4), described processor (6) is connected with receiving cable I (3), receiving cable II (4) and electronic compass (5) respectively, and described directional antenna (1), omnidirectional antenna (2) and electronic compass (4) all rotate with same angular velocity.
2. a kind of double-channel amplitude-comparison direction finding system according to claim 1, is characterized in that: the Research of Antenna Polarization of described directional antenna (1) is identical with the Research of Antenna Polarization of omnidirectional antenna (2).
3. a kind of double-channel amplitude-comparison direction finding system according to claim 1, is characterized in that: the antenna gain of described directional antenna (1) is higher than the antenna gain of omnidirectional antenna (2).
4. a kind of double-channel amplitude-comparison direction finding system according to any one of claim 1-3, is characterized in that: described directional antenna (1) is loaded ring antenna or log-periodic antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520409916.2U CN204719226U (en) | 2015-06-15 | 2015-06-15 | A kind of double-channel amplitude-comparison direction finding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520409916.2U CN204719226U (en) | 2015-06-15 | 2015-06-15 | A kind of double-channel amplitude-comparison direction finding system |
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| CN204719226U true CN204719226U (en) | 2015-10-21 |
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| CN201520409916.2U Active CN204719226U (en) | 2015-06-15 | 2015-06-15 | A kind of double-channel amplitude-comparison direction finding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2615491C1 (en) * | 2015-11-17 | 2017-04-05 | Федеральное государственное унитарное предприятие "Ростовский-на-Дону научно-исследовательский институт радиосвязи" (ФГУП "РНИИРС") | Method for simultaneous measuring two angular objective coordinates in review amplitude monopulse radar system with antenna array and digital signal processing |
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2015
- 2015-06-15 CN CN201520409916.2U patent/CN204719226U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2615491C1 (en) * | 2015-11-17 | 2017-04-05 | Федеральное государственное унитарное предприятие "Ростовский-на-Дону научно-исследовательский институт радиосвязи" (ФГУП "РНИИРС") | Method for simultaneous measuring two angular objective coordinates in review amplitude monopulse radar system with antenna array and digital signal processing |
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