Radio frequency front-end device of L-band high-altitude meteorological detection passive phased array receiver

Abstract

The utility model relates to a radio frequency front-end device of an L-band high-altitude meteorological detection passive phased array receiver, in particular to a radio frequency front-end device of an L-band high-altitude meteorological detection passive phased array receiver. The device comprises four channels and a four-in-one combiner, each channel comprises an amplitude limiter, a first amplifier, a second amplifier and a phase shifter, the input end of the first amplifier is connected with the output end of the amplitude limiter, the output end of the first amplifier is connected with the input end of the second amplifier, and the output end of the second amplifier is connected with the phase shifter. The output end of the second amplifier is connected with the input end of the phase shifter, and the output ends of the phase shifters of the four channels are connected with the input end of the four-in-one combiner. The L-band passive phased array radio frequency front-end device has the advantages of high maximum input power, high gain, high phase shift precision and low cost.

Description

Technical Field

[0001] The present application relates to the technical field of high-altitude meteorological detection, and in particular to a radio frequency front-end device of a passive phased array receiver for L-band high-altitude meteorological detection. Background Art

[0002] Based on the high-altitude meteorological detection of L-band sounding instruments, the sounding instruments are suspended from sounding balloons to observe high-altitude meteorological information. The sounding instruments transmit the observation data to the receiving antenna on the ground through the transmitter, and then the ground equipment receives the observation data for subsequent analysis and processing as the main basis for weather forecasting. The receiving antenna usually uses 4 antenna units to form a 2*2 planar antenna array. Each antenna unit is connected to a channel of the RF front end. By adjusting the phase of each channel, the spatial angle switching of the antenna beam is achieved. The existing receiver RF front-end device has the disadvantages of low integration, high cost, and difficulty in carrying. Summary of the invention

[0003] The present application provides a radio frequency front-end device for an L-band high-altitude meteorological detection passive phased array receiver, which has the advantages of realizing spatial angle switching of antenna beams and also having the characteristics of small insertion loss, small size, low noise coefficient and low cost.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: using four channels and a four-in-one combiner, each channel includes: a limiter, a first amplifier, a second amplifier and a phase shifter. The overall principle block diagram is as follows Figure 1 shown.

[0005] According to the above scheme, the limiter model is PE45361 from Murata, which is a monolithic integrated power limiter with an insertion loss of 0.4dB and a maximum pulse input power of 100W. Figure 2 shown.

[0006] According to the above scheme, the model of the first amplifier is ASB's ASL19W, with a gain of 20dB, a noise figure of 0.9, and an output 1dB compression point power of 22dBm. Figure 3 shown.

[0007] According to the above scheme, the second amplifier is also ASB's ASL19W, and its input is connected to the output of the first amplifier, and the total gain reaches 40dB. Figure 3 shown.

[0008] According to the above scheme, the phase shifter model is MACOM's MAPS-010163, with a 6-bit control word and a minimum phase shift interval of 5.6 degrees. Figure 4 shown.

[0009] According to the above scheme, the four-in-one combiner is composed of two-stage Wilkinson power dividers. The first stage is two one-to-two Wilkinson power dividers. The input end of the power divider is used as the output end, and the output end is used as the input end, forming four input ends, which are connected to the outputs of four phase shifters respectively. The second stage is a one-to-two Wilkinson power divider. The output end of the power divider is used as the input end, connected to the output of the first stage, and finally combined into one output. Figure 5 shown.

[0010] The utility model has the following beneficial effects:

[0011] The utility model has the characteristics of small insertion loss, small volume, low noise coefficient and low cost on the basis of realizing the spatial angle switching of the antenna beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is an overall principle block diagram of a radio frequency front-end device of a passive phased array receiver for L-band high-altitude meteorological detection in the present application.

[0013] Figure 2 This is a schematic diagram of a limiter in a specific implementation manner of the present application.

[0014] Figure 3 This is a schematic diagram of an amplifier in a specific implementation manner of the present application.

[0015] Figure 4 This is a schematic diagram of a phase shifter in a specific implementation manner of the present application.

[0016] Figure 5 This is a schematic diagram of a four-in-one combiner in a specific implementation manner of the present application.

[0017] Figure 6 This is a layout diagram of an antenna array in a specific implementation manner of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Please refer to Figure 1 The utility model is a radio frequency front-end device of a passive phased array receiver for L-band high-altitude meteorological detection, which adopts four channels and a four-in-one combiner, and each channel includes: a limiter, a first amplifier, a second amplifier and a phase shifter.

[0020] Please refer to Figure 2 The model of the limiter is PE45361 from Murata, which is a monolithic integrated power limiter with an insertion loss of 0.4dB and a maximum pulse input power of 100W.

[0021] Please refer to Figure 3 The model of the first amplifier is ASL19W of ASB company, with a gain of 20dB, a noise figure of 0.9dB, and an output 1dB compression point power of 22dBm.

[0022] Please refer to Figure 3 The second amplifier is also ASB's ASL19W, and its input is connected to the output of the first amplifier, with a total gain of 40dB.

[0023] Please refer to Figure 4 The phase shifter model is MACOM's MAPS-010163, with a 6-bit control word, a minimum phase shift interval of 5.6 degrees, and an insertion loss of 5dB.

[0024] Please refer to Figure 5 The four-in-one combiner is composed of two stages of Wilkinson power dividers. The first stage is two one-to-two Wilkinson power dividers. The input end of the power divider is used as the output end, and the output end is used as the input end, forming four input ends, which are connected to the outputs of four phase shifters respectively. The second stage is a one-to-two Wilkinson power divider. The output end of the power divider is used as the input end, connected to the output of the first stage, and finally combined into one output.

[0025] Technical parameters of the L-band high-altitude meteorological detection passive phased array receiver RF front-end device:

[0026] a) Number of channels: 4

[0027] b) Gain: 40.6dB

[0028] c) Noise figure: 1.1dB

[0029] d) Output 1dB compression point: 26dBm

[0030] e) Minimum phase shift interval for each channel: 5.625°

[0031] f) Maximum phase shift angle of each channel: 354.375°

[0032] In another embodiment of the utility model, based on the structure of the above L-band high-altitude meteorological detection passive phased array receiver radio frequency front-end device, the following principles are also included:

[0033] In this embodiment, the total gain of the RF front end is obtained by adding the gain of each stage minus the insertion loss to obtain -0.4+20+20-5+6=40.6dB.

[0034] In this embodiment, the total noise figure of the RF front end is obtained by cascading the noise figure and gain of each stage,

[0035]

[0036] The calculation is 1.1dB.

[0037] In this embodiment, the antenna array connected to the RF front end is a 2*2 unit, each unit is connected to a channel of the RF front end, and the specific layout is as follows: Figure 6 As shown, the unit spacing in the X-axis direction is 100mm, the unit spacing in the Y-axis direction is 100mm, θ is the pitch angle of the space spherical coordinate system, and Φ is the azimuth angle of the space spherical coordinate system. The relationship formula between the phase shift of each channel and the array beam steering angle is:

[0038]

[0039] Where (x ij ,y ij ) represents the coordinates of each antenna unit, and the phase shift value of each channel phase shifter can be calculated from the required array beam steering angle.

[0040] Functions of the L-band high-altitude meteorological detection passive phased array receiver RF front-end device:

[0041] a) Amplify the wireless signal transmitted by the L-band radiosonde received by the antenna and send it to the next stage for signal processing.

[0042] b) Control the beam steering angle of the array antenna so that the antenna beam is aligned with the direction of the L-band radiosonde.

[0043] The parts not involved in the present invention are the same as the prior art or are implemented by using the prior art.

[0044] The above content is a further detailed description of the present invention in combination with a specific implementation method. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. An L-band high-altitude meteorological detection passive phased array receiver radio frequency front-end device, characterized in that: It includes four channels and a four-in-one combiner, each channel includes a limiter, a first amplifier, a second amplifier and a phase shifter; The model of the limiter is PE45361 from Murata; The first amplifier model is ASL19W from ASB; The model of the second amplifier is ASL19W from ASB; The phase shifter model is MAPS-010163 from MACOM; The four-in-one combiner is composed of two-stage Wilkinson power dividers. The first stage is two one-to-two Wilkinson power dividers. The input end of the power divider is used as the output end, and the output end is used as the input end, forming four input ends, which are connected to the outputs of four phase shifters respectively. The second stage is a one-to-two Wilkinson power divider. The output end of the power divider is used as the input end, connected to the output of the first stage, and finally combined into one output.

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