The non-linear knot detection radar of antenna and receiving and transmitting front end integrated design
Technical field
The utility model relates to detection radar, specifically is exactly the non-linear knot detection radar of ultrahigh frequency that a kind of exploring antenna and detection main frame receiving and transmitting front end are integrated in one.
Background technology
PN junction in the electronic devices and components can give off higher hamonic wave again under the irradiation of ultrahigh frequency electromagnetic signal, and the object in the nature does not have similar physical characteristics.Non-linear knot detection radar is exactly to utilize this class feature of electronic devices and components to search the electronic target of being hidden, and this type of target comprises wiretap, sending box etc., so non-linear knot detection radar is important safe and secret checkout facility.
Because conventional exploring antenna such as microstrip antenna, thereafter bigger to radiation signal, if detection radar main frame receiving and transmitting front end is excessively near the exploring antenna back side, then this signal electronic devices and components that will shine in the main frame receiving and transmitting front end make it to give off the higher hamonic wave signal again, thereby the jamming target signal causes the system can't operate as normal.In view of above reason, present non-linear knot detection radar often is designed to detection radar main frame and two independent sectors of exploring antenna, and with 1~2 meter long high frequency cable connection, as SFT-50-2, every meter loss is about 1dB between the two.Because there is loss in high frequency cable to high-frequency signal, adopt this scheme to sacrifice performances such as the emissive power of non-linear knot detection radar and receiving sensitivity; And because the effect that involves of cable, the operation of detection radar is dumb, and rupture easily in cable plug place.
Summary of the invention
The utility model is for example overcomes the above-mentioned shortcoming that existing non-linear detection radar exists, and a kind of exploring antenna that connects without cable that provides and survey the non-linear knot detection radar of ultrahigh frequency that the main frame receiving and transmitting front end is integrated in one.
In order to realize above-mentioned target, the technical measures that the utility model is taked are: the non-linear knot detection radar of antenna and receiving and transmitting front end integrated design, comprise exploring antenna and detection radar main frame, it is characterized in that described detection radar main frame front end is provided with the metallic shield box; Also comprise metal antenna seat, absorbing material and bonding conductor; Described absorbing material is located at metallic shield box front end; Described metal antenna seat is arranged on the absorbing material front end; Described exploring antenna is located on the metal antenna seat; Described bonding conductor one end connects exploring antenna, and the other end passes metal antenna seat, absorbing material and metallic shield box, is connected with detection radar main frame front end in being located at the metallic shield box.
The non-linear knot detection radar of above-mentioned antenna and receiving and transmitting front end integrated design, wherein, described exploring antenna is a microstrip antenna.
The non-linear knot detection radar of above-mentioned antenna and receiving and transmitting front end integrated design, wherein, described metal antenna seat comprises by aluminum and constituting.
The non-linear knot detection radar of above-mentioned antenna and receiving and transmitting front end integrated design, wherein, described absorbing material comprises the composite dielectric absorbing material.
The non-linear knot detection radar of above-mentioned antenna and receiving and transmitting front end integrated design, wherein, described bonding conductor is a high frequency cable.
The utility model strengthens the antenna ground face, thereby has reduced the antenna backscatter signal owing to adopt at exploring antenna back side installation metal antenna seat; Absorbing material is installed behind antenna pedestal simultaneously, is absorbed the antenna backscatter signal; Moreover be to survey the main frame receiving and transmitting front end to design measures such as metallic shield box screened shielded antanna backscatter signal, reduce the antenna backscatter signal effectively, make it drop to very low level, guarantee that complete machine can be integrated in the one operate as normal the irradiation power of surveying circuit in the main frame receiving and transmitting front end.The advantage that have that system emission power is reduced, receiving sensitivity improves, and the problem of avoiding cable splice frequent breakage causing complete machine to work owing to involve.
Description of drawings
Concrete structure of the present utility model is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the structural representation of the non-linear knot detection radar of the utility model antenna and receiving and transmitting front end integrated design.
Embodiment
See also Fig. 1.The non-linear knot detection radar 100 of the utility model antenna and receiving and transmitting front end integrated design comprises exploring antenna 1 and detection radar main frame 2, also comprises metal antenna seat 3, absorbing material 4 and bonding conductor 5.Described detection radar main frame 2 front ends are provided with metallic shield box 21, are provided with absorbing material 4 at the front end of metallic shield box, are provided with metal antenna seat 3 at the front end of absorbing material, and described exploring antenna 1 is located on the metal antenna seat 2.Described bonding conductor 5 one ends connect exploring antenna 1, and the other end passes metal antenna seat, absorbing material and metallic shield box, are connected with the front end of detection radar main frame 2 in being located at the metallic shield box.
Exploring antenna in the non-linear knot detection radar of the utility model antenna and receiving and transmitting front end integrated design can adopt microstrip antenna.Described metal antenna seat is made of aluminum, can certainly adopt other metal.Described absorbing material can adopt the composite dielectric absorbing material, for example RX-L section bar material.Described bonding conductor can be made of more than one centimetres high frequency cable.Survey the main frame receiving and transmitting front end and can use sticking-element to improve the main frame integrated level, reduce volume and weight reduction.
The utility model is compared with the non-linear knot detection radar of traditional type, and the utility model system signal does not have Decay through cable is arranged, and system emission power is reduced and receiving sensitivity is improved, and avoids Cable connector owing to involve problem that frequent breakage causes complete machine to work, make the flexible operation of complete machine Property also is improved. The utility model has preferably practicality and economy.