CN107907871A - A kind of multi channel signals power detection device - Google Patents

Abstract

A kind of multi channel signals power detection device of disclosure of the invention,It includes cavity (1),Radio circuit (2),Frequency synthesizer module (3),Power supply processing circuit (4),Master board (5),Inner cover plate (6),Cavity lower cover (7),Antenna (8),Antenna house (9),Antenna cover (10),Cavity upper cover plate (11),Cover board (12),Side cover plate (13),Tripod annex (14),Tripod interface (15),Power connection (16),Cable (17),Radio frequency connector (18),Radio-frequency terminals (19),Whip antenna (20),Connector (21),Indicator light (22),Three tunnels of the signal that the equipment receives antenna (8) point are input to radio circuit (2),Pass through low-noise amplifier,After the processing such as frequency conversion component,It is filtered again,Amplification,Logarithmic detector processing,Radiofrequency signal is switched into vision signal,The size of actual signal power is drawn by A/D samplings and back-end processing.The multi channel signals power detection device has multichannel, high sensitivity, portable advantage, and production cost is low, is conducive to the miniaturization of signal power measuring equipment.

Description

A multi-channel signal power detection device

technical field

The invention relates to the field of radio frequency circuit design, in particular to a multi-channel signal power detection device.

Background technique

The multi-channel signal power detection equipment is mainly used to detect the working state of the radar and has high sensitivity. The multi-channel signal power detection equipment judges whether the radar transmitter is working normally by receiving the radar signal, and also has the ability to receive external signals at the same time as the radar to judge whether the radar receiver is working normally. In modern society, there are more and more radars of various types. In order to know the working status of the radar in time, it is required to be able to quickly detect the receiving and transmitting capabilities of the radar. In order to facilitate detection, multi-channel, integrated, and miniaturized signal power detection equipment has become an inevitable choice.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art, provide a multi-channel signal power detection device, reduce the volume of the product, and improve the detection sensitivity and detection accuracy of the product.

The purpose of the present invention is achieved through the following technical solutions: a multi-channel signal power detection device, which includes a cavity, a radio frequency circuit, a frequency synthesizer module, a power processing circuit, a main control board, an antenna, a power connector, a cable, and a radio frequency connection device, radio frequency terminal, inverted whip antenna and connector; the radio frequency circuit is bonded in the cavity, the radio frequency circuit is electrically connected to the frequency synthesizer module, and the frequency synthesizer module is fixedly connected to the cavity by screws Inside the body, the front side of the frequency synthesizer module is provided with an inner cover, a cavity upper cover and a cover in sequence from the inside to the outside, and the inner cover, the cavity upper cover and the cover are all fixed on the cavity , the rear side of the cavity is provided with a slot, and a power processing circuit is arranged in the slot, one end of the power processing circuit is connected to the feed terminal, and the other end is connected to the radio frequency circuit, and the main control board is pressed on the power processing circuit , the main control board is fixedly connected to the cavity, a connector is welded on the main control board, a side cover is fixedly connected to the left side of the cavity, and there is a via hole on the side cover, the connector The inverted whip antenna is connected to the connector through a hole, and the rear side of the main control board is provided with a lower cover plate of the cavity, and the lower cover plate of the cavity is fixedly connected to the On the cavity, an antenna is pressed on the outside of the lower cover of the cavity, and the antenna is provided with a radome, and the radome is fixed on the antenna cover, and the antenna cover covers the antenna and is fixed on the cavity, The right side of the cavity is provided with a plurality of sets of special-shaped through-holes at the input end, and radio-frequency terminals are welded in the special-shaped through-holes at the input end, one end of the radio-frequency terminal is connected to the radio-frequency circuit, and the other end of the radio-frequency terminal is connected to the radio-frequency connector The radio frequency connector is connected to the antenna through a cable, and the left side of the cavity is fixed with a power connector through a screw, and the power connector is connected to the main control board through a wire.

The antenna is a broadband receiving antenna.

The back side of the main control board is welded with an indicator light for judging the working state of the equipment.

A tripod attachment is arranged outside the cable, and the tripod attachment is fixed on the cavity, and a tripod interface is fixed on the tripod attachment by screws.

The present invention has the following advantages: the antenna device proposed by the present invention, and the antenna is connected to multiple sets of radio frequency circuit channels through multiple groups of optical cables, can realize the multi-frequency point radio frequency signal amplitude measurement function, and judge the emission of the radar transmitter and the radar receiver Whether the reception is working normally; the present invention rationally utilizes the space layout, greatly reduces the volume of the multi-channel signal power detection equipment, improves the detection sensitivity and detection accuracy of the product, the detection sensitivity is better than -66dBm, and improves the product reliability. The degree of integration reduces production costs.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is a schematic diagram of the cavity and the circuit in the cavity of the multi-channel signal power detection device of the present invention;

In the figure: 1-cavity, 2-radio frequency circuit, 3-frequency synthesizer module, 4-power processing circuit, 5-main control board, 6-inner cover, 7-cavity lower cover, 8-antenna, 9-radome, 10-antenna cover, 11-cavity upper cover, 12-cover, 13-side cover, 14-tripod attachment, 15-tripod interface, 16-power connector, 17-cable, 18 - RF connector, 19 - RF terminal, 20 - inverted whip antenna, 21 - connector, 22 - indicator light.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

As shown in Figures 1 and 2, a multi-channel signal power detection device includes a cavity 1, a radio frequency circuit 2, a frequency synthesizer module 3, a power processing circuit 4, a main control board 5, an antenna 8, a power connector 16, Cable 17, radio frequency connector 18, radio frequency terminal 19, inverted whip antenna 20 and connector 21; radio frequency circuit 2 is bonded in cavity 1, radio frequency circuit 2 is electrically connected to frequency synthesizer module 3, frequency synthesizer module 3 is fixedly connected in the cavity 1 by screws, and the front side of the frequency synthesizer module 3 is provided with an inner cover 6, a cavity upper cover 11 and a cover 12 in sequence from the inside to the outside, the inner cover 6, the cavity upper cover Both the plate 11 and the cover plate 12 are fixed on the cavity 1 , such a multi-layer structure protects the electronic devices in the cavity 1 and prevents the electronic devices from being damaged during the collision of the instrument.

There is a groove on the rear side of the cavity 1, and a power processing circuit 4 is arranged in the groove. One end of the power processing circuit 4 is connected to the feed terminal, and the other end is connected to the radio frequency circuit 2. The main control board 5 is pressed on the power processing circuit 4. The control board 5 is fixedly connected to the cavity 1, the main control board 5 is welded with a connector 21, and the left side of the cavity 1 is fixedly connected with a side cover 13, and the side cover 13 has a via hole, and the connection The device 21 extends to the outside of the cavity 1 through a via hole, and the inverted whip antenna 20 is connected to the connector 21 through threads, and the rear side of the main control board 5 is provided with a cavity lower cover plate 7, and the cavity lower cover plate 7 passes through The screws are fixedly connected to the cavity 1, and the outer side of the lower cover plate 7 of the cavity is pressed with an antenna 8, and the antenna 8 is provided with a radome 9, and the radome 9 is fixed on the antenna cover 10, and the antenna cover 10 covers the antenna 8 , and fixed on the cavity 1, which can protect the antenna and avoid damage to the antenna due to external factors, such as exposure to heat and humidity. A radio frequency terminal 19 is welded. One side of the radio frequency terminal 19 is connected to the radio frequency circuit 2, and the other end is connected to the radio frequency connector 18. The radio frequency connector 18 is connected to the antenna 8 through the cable 17. The left side of the cavity 1 is fixed with a power connector by screws. 16. The power connector 16 is connected to the main control board 5 through wires.

Preferably, the antenna 8 is a broadband receiving antenna.

Preferably, an indicator light 22 for judging the working state of the device is welded on the back side of the main control board 5 .

Preferably, the cable 17 is provided with a tripod attachment 14, the tripod attachment 14 is fixed on the cavity 1, and a tripod interface 15 is fixed on the tripod attachment 14 by screws.

The working process of the present invention is as follows: the radio frequency signal of the radar transmitter received by the multi-channel signal power detection device through the broadband receiving antenna is combined with the high-precision stable frequency produced by the frequency synthesizer module of the instrument itself, and the new frequency produced is passed through The frequency conversion, filtering, amplification, and logarithmic detection processing of the RF circuit convert the RF signal into a video signal, and the video signal is transmitted to the main control board through the circuit, and the actual amplitude information is obtained through A/D sampling and back-end processing, and then through the inverted The whip-shaped antenna transmits information to the terminal equipment, and judges whether the radar transmitter is working normally according to the information obtained by the terminal equipment.

Compared with ordinary detection equipment, this device uses three radio frequency signal channels, and each signal channel can receive signals of different frequencies, which can improve the working frequency range of the detection equipment and improve the test accuracy of the equipment. The antenna passes through multiple groups The optical cable is connected with multiple groups of radio frequency circuit channels, which can realize the function of multi-frequency point radio frequency signal amplitude measurement, and judge whether the transmission of the radar transmitter and the reception of the radar receiver are working normally; the present invention makes reasonable use of the space layout, greatly reducing The size of the multi-channel signal power detection equipment improves the detection sensitivity and detection accuracy of the product, and the detection sensitivity is better than -66dBm, which improves the integration degree of the product and reduces the production cost.

The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise of not departing from the inventive concept of the present invention, some deformations and improvements can also be made, and these all belong to the present invention. protection scope of the invention.

Claims (4)

1. A multi-channel signal power detection device, characterized in that it includes a cavity (1), a radio frequency circuit (2), a frequency synthesizer module (3), a power processing circuit (4), and a main control board (5) , antenna (8), power connector (16), cable (17), radio frequency connector (18), radio frequency terminal (19), inverted whip antenna (20) and connector (21); the radio frequency circuit (2 ) is bonded in the cavity (1), the radio frequency circuit (2) is electrically connected to the frequency synthesizer module (3), and the frequency synthesizer module (3) is fixedly connected to the cavity (1) by screws ), the front side of the frequency synthesizer module (3) is sequentially provided with an inner cover (6), a cavity upper cover (11) and a cover (12), and the inner cover (6 ), the upper cover plate (11) and the cover plate (12) of the cavity are all fixed on the cavity (1), the rear side of the cavity (1) has a groove, and the power processing circuit (4) is arranged in the groove , one end of the power processing circuit (4) is connected to the feed terminal, and the other end is connected to the radio frequency circuit (2), the main control board (5) is pressed on the power processing circuit (4), and the main control board ( 5) Fixedly connected to the cavity (1), the main control board (5) is welded with a connector (21), the left side of the cavity (1) is fixedly connected to a side cover (13), the side cover (13) has a via hole, and the connector (21) extends to the outside of the cavity (1) through the via hole. The inverted whip antenna (20) is connected to the connector by screws, and the main control board (5) The rear side is provided with a cavity lower cover (7), which is fixedly connected to the cavity (1) by screws, and an antenna (8) is pressed on the outer side of the cavity lower cover (7) , the antenna (8) is provided with a radome (9), the radome (9) is fixed on the antenna cover (10), the antenna cover (10) covers the antenna (8) and is fixed On the cavity (1), a plurality of sets of input end special-shaped through holes are arranged on the right side of the cavity (1), and radio frequency terminals (19) are welded in the input end special-shaped through holes, and the radio frequency terminals (19 ) is connected to the radio frequency circuit (2), the other end of the radio frequency terminal is connected to the radio frequency connector (18), the radio frequency connector (18) is connected to the antenna (8) through the cable (17), and the cavity ( The left side of 1) is fixed with a power connector (16) by screws, and the power connector (16) is connected to the main control board (5) through wires. 2. A multi-channel signal power detection device according to claim 1, characterized in that the antenna (8) is a wide receiving antenna. 3. A multi-channel signal power detection device according to claim 1, characterized in that: an indicator light (22) for judging the working state of the device is welded on the rear side of the main control board. 4. A multi-channel signal power detection device according to claim 1, characterized in that: a tripod attachment (14) is arranged on the outside of the cable (17), and the tripod attachment (14) is fixed in the cavity (1 ), the tripod attachment (14) is fixed with a tripod interface (15) by screws.