Front-end signal synchronous processing device for millimeter wave phased-array antenna test

Abstract

The utility model discloses a front-end signal synchronous processing device for millimeter wave phased-array antenna testing, which comprises a transmitting end part, a receiving end part, a local oscillator intermediate frequency part and a control part, and is characterized in that the control part provides synchronous working control signals for the receiving end part, the transmitting end part and the local oscillator intermediate frequency part; and receiving an external vector network synchronization trigger signal, and keeping synchronous work with external equipment. According to the utility model, the frequency band of the antenna plane near-field test can be expanded to millimeter waves, during the test, a transmitting end signal is subjected to frequency multiplication, expanded to the antenna working frequency and then output after amplification, and a receiving end signal is firstly amplified and then mixed with a local oscillator source to the vector network working frequency. The receiving end and the transmitting end work synchronously under the control of the control panel and keep synchronous with the external equipment, antenna parameters are tested, control and interface setting of the special device are reasonable, and the special device is convenient to use.

Description

Technical Field

[0001] The utility model relates to a phased array antenna testing technology, in particular to a front-end signal synchronization processing device for millimeter wave phased array antenna testing. Background Art

[0002] During the automatic planar near-field test of the antenna, for the millimeter-wave antenna test that exceeds the operating frequency band of the vector network analyzer, it is necessary to use a standard commercial millimeter-wave spread spectrum module, which is expensive to purchase. The planar near-field test of the antenna based on the vector network analyzer can only measure the microwave frequency band and cannot reach the antenna operating frequency band. Summary of the invention

[0003] In view of the problems existing in the prior art, the utility model provides a front-end signal synchronization processing device for millimeter wave phased array antenna testing that expands the frequency band of antenna planar near-field testing to the millimeter wave frequency band. The receiving end and the transmitting end work synchronously under the control of a control board and keep synchronization with external equipment to test antenna parameters. The control and interface settings of the special device are reasonable, easy to use, and cost-effective.

[0004] The purpose of the utility model is achieved through the following technical solutions.

[0005] A front-end signal synchronization processing device for millimeter wave phased array antenna testing includes a transmitting end part, a receiving end part, a local oscillator intermediate frequency part and a control part. The control part is respectively connected to the transmitting end part, the receiving end part, the local oscillator intermediate frequency part and an external vector network through signal cables. The control part provides a synchronous working control signal for the receiving end part, the transmitting end part and the local oscillator intermediate frequency part, receives an external vector network synchronization trigger signal, and maintains synchronous operation with external equipment.

[0006] The transmitting end part includes a frequency multiplication module, an amplification module, a signal cable and a power supply module. The frequency multiplication module receives an external vector network output signal, the frequency multiplication module outputs a signal to the amplification module, and the power supply module provides DC power supply for the frequency multiplication module and the amplification module.

[0007] The receiving part includes a mixing module, an amplifier module, a signal cable and a power supply module. The mixing module receives the input signal of the amplifier module and outputs it to the vector network for testing.

[0008] The local oscillator intermediate frequency part includes a local oscillator source, a local oscillator intermediate frequency unit, a signal cable and a power supply module. The local oscillator intermediate frequency part provides a fixed local oscillator signal and a variable local oscillator source signal for the transmitting end part and the receiving end part.

[0009] The external vector network outputs a signal with a frequency of 10 GHz to 15 GHz and a signal power level of +0 dBm ± 3 dBm.

[0010] The frequency doubling module outputs a signal frequency of 40 GHz to 60 GHz, and an output signal power of 0 dBm.

[0011] The operating frequency of the amplification module is 40 GHz to 60 GHz, and the gain is 30 dB.

[0012] The frequency mixer module receives an external input signal with a frequency of 40 GHz to 60 GHz, down-converts the signal to 10 GHz to 15 GHz, and outputs the signal to the vector network for testing.

[0013] Compared with the prior art, the utility model has the following advantages: the utility model expands the frequency band of the antenna planar near-field test to the millimeter wave frequency band, and during the test, the transmitting end signal is frequency-multiplied to expand it to the antenna operating frequency, and then amplified and output; the receiving end signal is first amplified, and then mixed with the local oscillator source to the vector network operating frequency; the receiving end and the transmitting end work synchronously under the control of the control board, and keep synchronized with the external equipment to test the antenna parameters; the control and interface settings of the special device are reasonable, easy to use, and highly cost-effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the internal composition principle diagram of the utility model.

[0015] Figure 2 This is a schematic block diagram of the working arrangement of the system of the utility model. DETAILED DESCRIPTION

[0016] The utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] like Figure 1As shown, the transmitting end part includes a frequency doubling module, an amplifying module and a power supply module. The frequency doubling module receives the signal with an output frequency of 10GHz to 15GHz from the external vector network, and the signal power level is +0dBm±3dBm. The frequency doubling module outputs a signal frequency of 40GHz to 60GHz, and the output signal power is 0dBm. The operating frequency of the amplifying module is 40GHz to 60GHz, and the gain is 30dB. The power supply module provides DC power supply for the frequency doubling module and the amplifying module. The receiving end part includes a mixing module, an amplifying module and a power supply module. The amplifying module works The frequency is 40GHz~60GHz, the gain is 30dB, the mixing module receives the external input signal frequency of 40GHz~60GHz, down-converts it to 10GHz~15GHz, and outputs it to the vector network for testing; the local oscillator intermediate frequency part includes the local oscillator intermediate frequency unit, local oscillator source, control module and power supply module. This part mainly provides fixed local oscillator signal and variable local oscillator source signal for processing device 1 and processing device 2; the control part provides synchronous working control signals for the receiving end, transmitting end and local oscillator source, receives external synchronous trigger signals, and maintains synchronous operation with external equipment.

[0018] like Figure 2 The figure shows the layout of a phased array antenna planar near-field measurement system, which mainly includes a darkroom test environment, a planar near-field scanning frame, various controllers, vector network, control computer and test accessories. When testing the antenna under test, a probe with known characteristics is installed on the scanning frame, and a surface 3 to 5 wavelengths away from the antenna under test is scanned to measure the amplitude and phase of the antenna at discrete points on the surface. After near-field-to-far-field transformation, the computer obtains the far-field characteristics of the antenna. In the figure, the part in the dotted box is the synchronous processing device, which is placed at the rear of the scanning frame probe, the rear of the antenna under test and the test cabinet. Taking the receiving characteristics of the test antenna as an example, the dedicated device at the back of the probe is the transmitting end part, which is responsible for expanding the frequency band of the source signal output from the vector network port upward to the antenna working frequency band, and outputting the signal to the probe after amplifying the signal. The processing device at the back of the antenna under test is the receiving end part, which is responsible for amplifying the received signal and down-converting it to the source signal frequency, and outputting it to the vector network for testing. The processing device in the cabinet is the local oscillator intermediate frequency part and the control part, which provide the local oscillator source signal and synchronization control signal for the receiving and transmitting ends, and receive external synchronization trigger signals to keep the internal and external equipment working synchronously.

[0019] The hardware of the utility model uses a customized frequency doubling module, a customized amplifying module and a DC power supply. During the test, the transmitting end signal is frequency-multiplied and expanded to the antenna operating frequency, and then amplified by the amplifying module and output; a customized frequency mixing module, a customized amplifying module and a DC power supply are used. When the signal is received, power amplification is first performed, and then the signal is mixed with the local oscillator source signal to the vector network operating frequency to test the antenna parameters, thereby realizing the function of expanding the test antenna frequency band; a customized local oscillator source module is used to provide fixed and variable local oscillator signals for the receiving end and the transmitting end modules; a customized control board is used to provide synchronous working control signals for the receiving end, the transmitting end and the local oscillator source, receive external synchronous trigger signals, and maintain synchronous operation with external equipment.

Claims

1. A front-end signal synchronization processing device for millimeter wave phased array antenna testing, characterized in that It includes a transmitting end part, a receiving end part, a local oscillator intermediate frequency part and a control part. The control part is connected to the transmitting end part, the receiving end part, the local oscillator intermediate frequency part and the external vector network through signal cables respectively. The control part provides synchronous working control signals for the receiving end part, the transmitting end part and the local oscillator intermediate frequency part, receives external vector network synchronous trigger signals, and maintains synchronous working with external equipment.

2. The front-end signal synchronization processing device for millimeter wave phased array antenna testing according to claim 1, characterized in that The transmitting end part includes a frequency multiplication module, an amplification module, a signal cable and a power supply module. The frequency multiplication module receives an external vector network output signal, the frequency multiplication module outputs a signal to the amplification module, and the power supply module provides DC power supply for the frequency multiplication module and the amplification module.

3. The front-end signal synchronization processing device for millimeter wave phased array antenna testing according to claim 1, characterized in that The receiving part includes a mixing module, an amplifier module, a signal cable and a power supply module. The mixing module receives the input signal of the amplifier module and outputs it to the vector network for testing.

4. The front-end signal synchronization processing device for millimeter wave phased array antenna testing according to claim 1, characterized in that The local oscillator intermediate frequency part includes a local oscillator source, a local oscillator intermediate frequency unit, a signal cable and a power supply module. The local oscillator intermediate frequency part provides a fixed local oscillator signal and a variable local oscillator source signal for the transmitting end part and the receiving end part.

5. The front-end signal synchronization processing device for millimeter wave phased array antenna testing according to claim 2, characterized in that The external vector network outputs a signal with a frequency of 10 GHz to 15 GHz and a signal power level of +0 dBm ± 3 dBm.

6. The front-end signal synchronization processing device for millimeter wave phased array antenna testing according to claim 5, characterized in that The frequency doubling module outputs a signal frequency of 40 GHz to 60 GHz, and an output signal power of 0 dBm.

7. A front-end signal synchronization processing device for millimeter wave phased array antenna testing according to claim 2 or 3, characterized in that The operating frequency of the amplification module is 40 GHz to 60 GHz, and the gain is 30 dB.

8. The front-end signal synchronization processing device for millimeter wave phased array antenna testing according to claim 3, characterized in that The frequency mixer module receives an external input signal with a frequency of 40 GHz to 60 GHz, down-converts the signal to 10 GHz to 15 GHz, and outputs the signal to the vector network for testing.

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