A multi-frequency terahertz inter-satellite communication receiver

Abstract

The invention discloses a multi-frequency-point terahertz inter-satellite communication receiver comprising a terahertz antenna, wherein the terahertz antenna is sequentially connected with a first switch, a third low noise amplifier, a first mixer, a second low noise amplifier, a third mixer, a fourth mixer and a broadband equalizer in sequence, a second switch is connected between a first switchinput end and an output end of the first mixer in parallel, and the two ends of the second switch are connected with a third switch, a second low noise amplifier and a second mixer, which are sequentially connected in sequence, in parallel; the first mixer and the third mixer are connected with a first local oscillation generator, the second mixer is connected with a second local oscillation generator, and the fourth is connected with a third local oscillation generator. The multi-frequency-point terahertz inter-satellite communication receiver can accomplish the signal receiving of four frequency points, multiple the medium low noise amplifiers, the mixers and other elements, and switch the four frequency points through antenna switch matrixes so as to ensure the communication performance, greatly reduce the power consumption and the area of the chip, and simplify the architecture design of the receiving end.

Description

technical field [0001] The invention belongs to the field of microwave engineering, and more specifically relates to a multi-frequency point terahertz inter-satellite communication receiver. Background technique [0002] The RF front-end is the part closest to the antenna in the wireless communication system, and its main task is to complete functions such as power amplification, filtering, and modulation and demodulation. Due to the complex and changeable environment of the spaceborne communication system, the surrounding noise and other external factors, the communication transmission distance is long, and the signal attenuation is relatively large, the terahertz RF front-end has structural requirements for the receiving scheme on parameters such as sensitivity, gain, and linearity. higher. [0003] Existing terahertz receivers can only receive signals at a single frequency point. In 2016, Chen Jiang et al. designed a 320GHz receiver with bandwidth and power consumption ...

AI Technical Summary

Problems solved by technology

Since it is impossible to use a single chip to complete the reception of multiple frequency point signals, a large number of components and modules, such as mixers, phase-locked loops, and amplifiers, can only be connected to each other through waveguides or PCBs, which greatly increases transmission loss.

If only relying on the high-speed receiving technology of each module without considering the connection and packaging technology between different modules, the high-speed receiving performance of the receiver will be greatly limited

Not only the power consumption and volume of the system are large, but the receivable frequency band is limited, which limits the flexibility of the system, and also reduces the transmission bandwidth and transmission rate, which is not conducive to the engineering of the inter-satellite communication system

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