Double-slot deep three-band differential-mode tracking feed and its design method

Abstract

The invention discloses a double-slot-depth tri-band differential mode coupling feed source and a design method thereof. A differential mode signal is coupled within a double-slot-depth corrugated groove cycle to achieve a single-band monopulse tracking function. Within three separate bands, such excellent characteristics as a rotational symmetry in a dominant mode radiation direction of a pattern, a low sidelobe level, a low reflection loss and a high gain are achieved. In the invention, advantages of the simple feed, compact structure, low production cost, and the like are realized. The monopulse tracking can simultaneously meet a requirement of a beam wave direction consistency among tracking bands, and track both a linear polarization beacon satellite and a circular polarization beacon satellite. The double-slot-depth tri-band differential mode tracking feed source and the design method thereof can be applicable to the multi-band multi-tracking antenna, and the multi-band multi-tracking common antenna feed sources include, for example, the L / S / C, S / C, C / Ku / Ka / , C / Ku, S / X and X / Ka.

Description

technical field [0001] The invention relates to a dual-slot deep three-band differential-mode tracking feed and its design method in the fields of communication broadcasting, moving targets, reconnaissance and countermeasures, measurement and control, and navigation, and is especially suitable for L / S, L / S / C, S / X, S / C, X / Ka and other systems that require multi-band real-time monopulse tracking or various monopulse tracking antennas in the case of very compact structure requirements. Background technique [0002] With the rapid growth of demand for satellite communication in modern society and the rapid development of navigation measurement and control technology, the working frequency band of some satellites has developed to dual frequency band, such as C / Ku, L / C, S / C, X / Ka and S / X and other dual-band, the future development of multi-band is the general trend. In order to expand the communication capacity of the satellite ground station antenna, reduce the construction co...

AI Technical Summary

Problems solved by technology

[0004] 1. Four-speaker synthesis method: This is a method with clear principle analysis, easy processing and practicality, but the application of this structure in dual-band or multi-band feed antennas leads to low irradiation efficiency of the antenna, and the biggest disadvantage is This method makes the beam pointing deviation between the frequency bands and the frequency bands relatively large, and makes the switching efficiency between the two frequency bands slower when dual-band or multi-band real-time tracking

[0005] 2. Circular waveguide TE 21 Mode mode: This is a method with clear principle analysis, high antenna irradiation efficiency, and better beam consistency, but its disadvantages are: first, due to TE 21 The mode coupler adopts an 8-arm coupled waveguide synthesis structure, and 8 rectangular waveguides are coupled with circular waveguides through 8 rows of small holes, resulting in complex processing and large structure size; second, most of this tracking method is only suitable for single-band tracking. If it is used on dual-band such as C / Ku, if the C-band adopts this tracking method, then the Ku-band will not work normally, so this tracking method cannot be applied to dual-band or multi-band tracking

[0006] 3. Circular waveguideTM 01 Modular mode: This method has simple and compact structure, low cost, and convenient polarization adjustment, but the disadvantage of this tracking method is that the working frequency band is relatively narrow, and it can only track circularly polarized beacon satellites but cannot track linearly polarized beacon satellites

[0007] The Chinese patent number is 03103242.7, and the name is "Double-slot structure, dual-band shared corrugated horn feed". The patent discloses a dual-slot structure, dual-band shared corrugated horn feed. Double-slot Deep Corrugated Horn Feed Source” patent discloses a high-performance broadband double-slot deep corrugated horn feed. 11 Mode communication signal, without coupling out differential mode HE from the double-slot deep corrugated speaker 21 mode, this feed cannot achieve monopulse tracking

[0008] Chinese patent No. 90203857.5, titled "Antenna Feed Network Device" 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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