Dual-frequency dual-polarized feed assembly in C frequency band

Abstract

The invention relates to a dual-frequency dual-polarized feed assembly in a C frequency band. The transceiving 4 / 6GHz is divided into two frequency bands, a dual-frequency orthogonal modal coupler is utilized to couple 4GHz transmitting signals into signals in four paths, and the phase shift power division characteristic of a bridge power divider and the relationship of four ports of the bridge power divider are utilized to synthesize the signals in the four paths into laevorotatory signals in one path and dextrorotatory signals in one path skillfully; after receiving frequency band signals pass through the dual-frequency orthogonal modal coupler smoothly, the laevorotatory signals and the dextrorotatory signals are divided by a simple dual-circular polarizer, thus realizing the receivingbands and the transmitting bands; and two polarized frequencies in each band are polarized and multiplexed. The feed assembly is compact in the structure and realizes the strictly consistent direction of the receiving band and the transmitting band. An antenna has the high polarization isolation (more than or equal to 30dB) and antijamming capability in the C band, the influence of the passive intermodulation in the antenna is low, and the electromagnetic compatibility between the working frequency bands is good.

Description

technical field [0001] The invention relates to a C-band adjustable dual-frequency dual-polarized circularly polarized feed assembly, which belongs to the sky [0002] line technology field. Background technique [0003] With the continuous deepening and wide application of satellite communication technology, more and more payload functions are required for satellites, and the integration level of antennas is also required to increase. How to accommodate more tasks under the limited space conditions of satellites is the main core technology for the development of communication satellites in the near future. Generally speaking, communication satellites provide simultaneous coverage of receiving and transmitting for a certain required beam, and the C-band wavelength is relatively short. Long, under the same conditions, achieving high EIRP and G / T values ​​requires a larger antenna aperture. The C-band is a dense frequency band for satellite BSS and FSS services. Under the li...

AI Technical Summary

Problems solved by technology

The existing public or known C-double transceiver shared communication satellite antenna is difficult to meet the application requirements

Moreover, similar designs are mostly used for ground applications, which cannot meet the requirements of space environment and satellite layout.

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