A single-slot deep c/ku dual-band differential-mode tracking feed and its design method

Abstract

The invention discloses a single-slot deep C / Ku dual-band differential mode tracking feed source, which belongs to the technical field of communication antennas. The feed source of the present invention includes a single-slot structure corrugated horn and a differential-mode feeder synthesis network. The single-slot structure corrugated horn is composed of a transition section, a mode conversion section, a frequency conversion section, a variable angle section and a radiation section, and the frequency conversion section is composed of a plurality of slot periods. In the single-slot structure form, eight coupling ports from the first to the eighth are evenly and sequentially opened on the circumference of the corrugated horn corresponding to a slot period in the front part of the variable-angle section, and the clip between two adjacent coupling ports The angle is 45 degrees. The invention can realize dual frequency band communication, dual frequency band monopulse tracking and dual frequency band sharing, and has the advantages of rotational symmetry of pattern, low side lobe level, small reflection loss, high gain, rotational symmetry of difference pattern and the like.

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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