W-band feed source front-end module

Abstract

The utility model discloses a W-band feed source front-end module, which comprises a first loop, a second loop and a third loop and integrates five W-band feed source horns, and adopts a simplest and reliable implementation mode in link design, so that the complexity of the whole assembly is reduced, and the cost is reduced. Interconnection between a radio frequency circuit and a low-frequency power supply control signal is realized by adopting vertical interconnection, and each channel or functional unit is partitioned and isolated, so that mutual interference between different frequencies and channels is reduced, and relatively good electromagnetic isolation and shielding are realized.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and particularly to a W-band feed front-end module. Background Art

[0002] With the continuous development of semiconductor technologies, the foundation for the research and development of radar technologies in higher frequency bands has been laid, and millimeter-wave radars have become the current key research direction. Especially in the W-band, signals in this frequency band have a high frequency, short wavelength, and at the same time have an ionosphere penetration with strong penetration, a high-transmission atmospheric window, and a large bandwidth. Therefore, the W-band has extremely prominent advantages in fields such as high-resolution imaging, high-resolution communication, satellite communication, and precision guidance.

[0003] Due to the high frequency band and relatively high integration level, the requirements for manufacturing processes and technologies are relatively high, and the application of the W-band is still in a relatively initial stage. The design and simulation of W-band waveguide structure circuits are relatively difficult, the implementation of isolation and shielding requirements between high-frequency multi-channels is difficult, and the precision control requirements for stacked interconnection docking are extremely high. Therefore, there are relatively few studies on the design and development of band feed front-ends that can be carried out currently. Utility Model Content

[0004] Aiming at the above deficiencies in the prior art, the W-band feed front-end module provided by the present utility model adopts the most concise and reliable implementation method in the link design, reduces the complexity of the entire component, and solves the problem of great difficulty in realizing the isolation and shielding requirements between high-frequency multi-channels.

[0005] To achieve the above utility model purpose, the technical solution adopted by the present utility model is: a W-band feed front-end module, including a first loop, a second loop, and a third loop;

[0006] The first loop includes a first horn, a second horn, a first sum-difference network, and a first down-converter;

[0007] The input ends of the first horn and the second horn are respectively used as the first input end and the second input end of the W-band feed front-end module. The output ends of the first horn and the second horn are both connected to the input end of the first sum-difference network. The output end of the first sum-difference network is connected to the input end of the first down-converter. The output end of the first down-converter is used as the first output end of the W-band feed front-end module;

[0008] The second loop includes a third horn, a fourth horn, a second sum-difference network, and a second down-converter;

[0009] The input ends of the third horn and the fourth horn are respectively used as the third input end and the fourth input end of the W-band feed front-end module. The output ends of the third horn and the fourth horn are both connected to the input end of the second sum-difference network. The output end of the second sum-difference network is connected to the input end of the second downconverter. The output end of the second downconverter is used as the second output end of the W-band feed front-end module;

[0010] The third loop includes a fifth horn, an orthomode coupler, a third downconverter, a first upconverter, and a fourth downconverter;

[0011] One end of the fifth horn is an input / output port. The other end of the fifth horn is connected to the bi-directional input end of the orthomode coupler. The coupled end of the orthomode coupler is connected to the reflected end of the circulator. The input end of the circulator is connected to the output end of the first upconverter. The input end of the first upconverter is used as the fifth input end of the W-band feed front-end module. The output end of the circulator is connected to the input end of the third downconverter. The output end of the third downconverter is used as the third output end of the W-band feed front-end module;

[0012] The output end of the orthomode coupler is connected to the input end of the fourth downconverter. The output end of the fourth downconverter is used as the fourth output end of the W-band feed front-end module.

[0013] Furthermore: The input signals of the first input end, the second input end, the third input end, and the fourth input end are all W-band signals. The output signals of the first output end, the second output end, the third output end, and the fourth output end are all intermediate-frequency signals.

[0014] Furthermore: The input signal of the fifth input end is an intermediate-frequency excitation signal.

[0015] Furthermore: The input signal of the input / output port is a W-band signal, and the output signal is a signal with a frequency band greater than 2W.

[0016] Furthermore: The models of the first downconverter, the second downconverter, the third downconverter, and the fourth downconverter are all ZVA-Z110, and the model of the first upconverter is ZVT20.

[0017] Furthermore: The model of the orthocoupler is CXOMT-9294, and the model of the circulator is CXCIR-9294.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. The most concise and reliable implementation method is adopted in the link design, effectively reducing the complexity of the entire component;

[0020] 2. Partition and isolate each channel or functional unit to reduce the mutual interference between different frequencies and channels, and achieve better electromagnetic isolation and shielding. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the front-end module of the W-band feed. Specific Embodiments

[0022] The following describes the specific embodiments of the present invention to facilitate those skilled in the art of this technology to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of this technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0023] As Figure 1 shown, in an embodiment of the present invention, a front-end module of a W-band feed is provided, which includes a first loop, a second loop, and a third loop;

[0024] The first loop includes a first horn, a second horn, a first sum-difference network, and a first down-converter;

[0025] The input ends of the first horn and the second horn are respectively used as the first input end and the second input end of the front-end module of the W-band feed. The output ends of the first horn and the second horn are both connected to the input end of the first sum-difference network. The output end of the first sum-difference network is connected to the input end of the first down-converter. The output end of the first down-converter is used as the first output end of the front-end module of the W-band feed;

[0026] The second loop includes a third horn, a fourth horn, a second sum-difference network, and a second down-converter;

[0027] The input ends of the third horn and the fourth horn are respectively used as the third input end and the fourth input end of the front-end module of the W-band feed. The output ends of the third horn and the fourth horn are both connected to the input end of the second sum-difference network. The output end of the second sum-difference network is connected to the input end of the second down-converter. The output end of the second down-converter is used as the second output end of the front-end module of the W-band feed;

[0028] The third loop includes a fifth horn, an orthomode coupler, a third down-converter, a first up-converter, and a fourth down-converter;

[0029] One end of the fifth horn is the input / output port. The other end of the fifth horn is connected to the bidirectional input end of the orthomode coupler. The coupled end of the orthomode coupler is connected to the reflection end of the circulator. The input end of the circulator is connected to the output end of the first upconverter. The input end of the first upconverter serves as the fifth input end of the W-band feed front-end module. The output end of the circulator is connected to the input end of the third downconverter. The output end of the third downconverter serves as the third output end of the W-band feed front-end module;

[0030] The output end of the orthomode coupler is connected to the input end of the fourth downconverter. The output end of the fourth downconverter serves as the fourth output end of the W-band feed front-end module.

[0031] The input signals of the first input end, the second input end, the third input end, and the fourth input end are all W-band signals. The output signals of the first output end, the second output end, the third output end, and the fourth output end are all intermediate-frequency signals.

[0032] The input signal of the fifth input end is an intermediate-frequency excitation signal.

[0033] The input signal of the input / output port is a W-band signal, and the output signal is a signal with a frequency band greater than 2W.

[0034] In this embodiment, the models of the first downconverter, the second downconverter, the third downconverter, and the fourth downconverter are all ZVA-Z110. The model of the first upconverter is ZVT20. The model of the orthocoupler is CXOMT-9294. The model of the circulator is CXCIR-9294.

[0035] In actual use, the W-band signals received by the first horn, the second horn, the third horn, and the fourth horn respectively form two sum-difference signals after passing through two sum-difference networks. These two sum-difference signals are respectively subjected to low-noise amplification, filtering, and then mixed with the local oscillator signal for the first downconversion, and the intermediate-frequency signal is output after filtering and amplification.

[0036] The fifth horn is divided into signals in two polarization directions through the orthomode coupler. One path enters the receiving channel for amplification and filtering, and then is mixed with the local oscillator signal for the first downconversion to obtain an intermediate-frequency signal;

[0037] The other path passes through the circulator and also undergoes receiving channel amplification and filtering, and then is mixed with the local oscillator signal for the first downconversion to obtain an intermediate-frequency output signal.

[0038] The fifth input end receives the intermediate-frequency excitation signal, which is subjected to matching attenuation and filtering, then mixed with the local oscillator, and after filtering, a W-band signal is obtained. After amplification and driver amplification, it drives the final-stage power amplification to output a signal greater than 2W, which is sent to the horn through the circulator and the orthomode coupler to complete signal transmission.

[0039] The performance indicators of the W-band feed front-end module are as follows:

[0040] 1. Transmitting channel:

[0041] Number of channels: 1;

[0042] Input frequency: 9.8 GHz;

[0043] Input power: -7 ± 2 dBm;

[0044] Output frequency: 92 - 94 GHz;

[0045] Output power: ≥ 33 dBm (at room temperature);

[0046] Waveform top drop: ≤ 1 dB (80 us pulse width);

[0047] In-band fluctuation: ≤ ±1 dB;

[0048] Transmitting pulse repetition frequency: 500 Hz - 4000 Hz;

[0049] Duty cycle: ≤ 10%;

[0050] Working pulse width: 20 us - 80 us;

[0051] Pulse rise and fall time: ≤ 200 ns.

[0052] 2. Receiving channel:

[0053] Number of channels: 4;

[0054] Input frequency: 92 - 94 GHz;

[0055] Instantaneous dynamic range: ≥ 35 dB;

[0056] Receiving channel anti-burning ability: 0.5 W (duration not exceeding 3 minutes, guaranteed by design);

[0057] Instantaneous bandwidth: 600 MHz;

[0058] Image rejection: ≥ 40 dB;

[0059] Intermediate frequency output frequency: 9.8 ± 0.3 GHz;

[0060] Channel gain: 26 ± 2 dB (at room temperature, excluding network);

[0061] Noise figure: ≤ 8.5 dB;

[0062] Intermediate frequency output P-1: ≥ 0 dBm;

[0063] Amplitude and phase stability between channels: (within 10 minutes) amplitude: ≤1 dB, phase: ≤5°;

[0064] Spurious suppression: ≥60 dBc;

[0065] Channel isolation: ≥50 dB.

[0066] 3. LO input:

[0067] LO input frequency: 27.4 - 28.1 GHz;

[0068] Frequency hopping: 11 points, frequency hopping step is 100 MHz;

[0069] LO input power: 0 - 5 dBm.

[0070] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "radial", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the features defined by "first", "second", "third" may explicitly or implicitly include one or more of such features.

Claims

1. A W-band feed front-end module, characterized in that It includes a first loop, a second loop and a third loop; The first loop includes a first horn, a second horn, a first sum-difference network and a first down-converter; The input ends of the first horn and the second horn are respectively used as the first input end and the second input end of the W-band feed front-end module. The output ends of the first horn and the second horn are both connected to the input end of the first sum-difference network. The output end of the first sum-difference network is connected to the input end of the first down-converter. The output end of the first down-converter is used as the first output end of the W-band feed front-end module; The second loop includes a third horn, a fourth horn, a second sum-difference network and a second down-converter; The input ends of the third horn and the fourth horn are respectively used as the third input end and the fourth input end of the W-band feed front-end module. The output ends of the third horn and the fourth horn are both connected to the input end of the second sum-difference network. The output end of the second sum-difference network is connected to the input end of the second down-converter. The output end of the second down-converter is used as the second output end of the W-band feed front-end module; The third loop includes a fifth horn, an orthomode coupler, a third down-converter, a first up-converter and a fourth down-converter; One end of the fifth horn is an input / output port. The other end of the fifth horn is connected to the bi-directional input end of the orthomode coupler. The coupled end of the orthomode coupler is connected to the reflection end of the circulator. The input end of the circulator is connected to the output end of the first up-converter. The input end of the first up-converter is used as the fifth input end of the W-band feed front-end module. The output end of the circulator is connected to the input end of the third down-converter. The output end of the third down-converter is used as the third output end of the W-band feed front-end module; The output end of the orthomode coupler is connected to the input end of the fourth down-converter. The output end of the fourth down-converter is used as the fourth output end of the W-band feed front-end module.

2. The W-band feed front-end module according to claim 1, wherein The input signals of the first input end, the second input end, the third input end and the fourth input end are all W-band signals. The output signals of the first output end, the second output end, the third output end and the fourth output end are all intermediate-frequency signals.

3. The W-band feed front-end module according to claim 1, characterized in that, The input signal of the fifth input end is an intermediate-frequency excitation signal.

4. The W-band feed front-end module according to claim 1, characterized in that, The input signal of the input / output port is a W-band signal, and the output signal is a signal with a frequency band greater than 2W.

5. The W-band feed front-end module according to claim 1, characterized in that, The models of the first down-converter, the second down-converter, the third down-converter and the fourth down-converter are all ZVA-Z110, and the model of the first up-converter is ZVT20.

6. The W-band feed front-end module according to claim 1, characterized in that, The model of the orthomode coupler is CXOMT-9294, and the model of the circulator is CXCIR-9294.

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