Single-groove deep C/Ku dual-band differential mode tracking feed source and design method thereof

Abstract

The invention discloses a single-groove deep C / Ku dual-band differential mode tracking feed source, and belongs to the technical field of the communication antenna. The feed source comprises a single-groove structure corrugated horn and a differential model feeder line synthesis network; the single-groove structure corrugated horn is composed of a transition section, a mode conversion section, a frequency conversion section, an angle variable section and a radiation section; the frequency conversion section is a single groove structure form composed of multiple groove periods, the first to the eighth coupling ports are uniformly and orderly formed on the circumference of the corrugated horn corresponding to one groove period at the front part of the angle variable section, the included angle between two adjacent coupling ports is 45 DEG. The single-groove deep C / Ku dual-band differential mode tracking feed source disclosed by the invention can realize the dual-band communication, the dual-band single-pulse tracking and the dual-band share, and has the advantages of being rotational symmetry in directional diagram, low in side lobe level, small in reflection loss, high in gain, and rotational symmetry in differential directional diagram.

Description

technical field [0001] The invention relates to the technical field of communication antennas, in particular to a single-slot deep C / Ku dual-band differential-mode tracking feed source and a design method thereof. Background technique [0002] With the ever-changing development of society, the rapid growth of demand for satellite communications and the rapid development of navigation measurement and control technology, in order to improve the utilization of satellite resources, more and more satellite working frequency bands have developed to dual-frequency and multi-frequency bands, such as the current use There are more dual-band satellites such as C / Ku, L / C, S / C, X / Ka and S / X, and the development of multi-band is the general trend in the future. For the satellite ground station antenna system, it is also necessary to keep up with the increasing demand for satellite communication traffic, increase the communication capacity of the satellite ground station antenna, and impr...

AI Technical Summary

Problems solved by technology

The current satellite earth station antenna fast tracking methods mainly adopt: program-guided tracking and monopulse tracking. Program-guided tracking needs to predict the satellite orbit data in advance, and the tracking is easy to deviate from the center, but the manufacturing cost is low. Monopulse tracking has high tracking accuracy, High speed, real-time, but high cost

At present, the monopulse tracking methods are mainly divided into the following four methods: The first method is multi-speaker synthesis. This method is currently mainly used to track radar antennas. The principle is clear and the captured signal is more sensitive. In the application of communication antennas, the radiation efficiency of the antenna is low, and the beam pointing consistency between the frequency bands is poor; the second method is the circular waveguide overmode coupling TE 21 mode, this is the way that the radiation efficiency of the antenna is high and the consistency of the sum and difference beams is good, but its disadvantage is that the TE 21 The mode coupler and the synthesis network are relatively complicated, so that the processing accuracy is relatively high. This method is suitable for single-band tracking networks, so this tracking method is not suitable for dual-band or multi-band tracking networks; the third method is circular Waveguide Overmode CouplingTM 01 mode, this method has a simple structure and low cost, but the disadvantage of this tracking method is that the working frequency band is narrow, and it can only track circularly polarized beacon satellites; the fourth method is corrugated horn groove bottom coupling HE 21 Mode mode, this mode is suitable for multi-band real-time tracking, compact size, low cost and other advantages

[0004] The Chinese patent with the application number CN20131016745.6 discloses a double-slot deep three-band differential mode tracking feed and its design method. The patent relates to a double-slot structure three-band shared corrugated horn feed and its L-band tracking technology. This patented technology is to couple the L-band differential mode tracking signal in the double-slot structure, and the L-band tracking of this patented technology is relatively narrow compared to the working frequency band. This feed cannot realize the wideband single pulse tracking function.

[0005] The Chinese patent application number CN90203857.5 discloses an antenna feed network device, which mainly consists of a corrugated horn and a TM 01 Composed of components such as mode couplers, instead of coupling differential mode HE from the corrugated groove 21 mode, and cannot realize the function of monopulse tracking linear polarized beacon satellite

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