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Ku-band constant-amplitude phase modulating feed component

An amplitude modulation and frequency band technology, which is applied in the field of amplitude modulation phase feed components, can solve the problem that the constant amplitude requires that the phase shift amount cannot be guaranteed with frequency stability, and achieves the guarantee of cross-polarization isolation, simple processing, and good matching performance. Effect

Active Publication Date: 2016-12-07
BEIJING AEROSPACE GUANGHUA ELECTRONIC TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

For the latter mechanism, the dielectric phase shifter or ferrite phase shifter commonly used in microwave cannot be directly used in the feed network, because the equal amplitude requirements of the two channels, the stability of the phase shift amount with frequency, etc. ensure

Method used

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  • Ku-band constant-amplitude phase modulating feed component

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Embodiment Construction

[0021] A ku-band equal-amplitude phase-modulation feed source assembly given in this embodiment is used for "communication in motion" antenna signal transmission, and the entire assembly is connected in series to the signal transmission channel.

[0022] This embodiment is composed of a waveguide-coaxial converter 41 , an orthogonal mode coupler 42 and a diaphragm circular polarizer 43 . In this embodiment, input port 1, output port 2, and port 3 are standard rectangular waveguide ports of BJ120. During operation, the ridge waveguide transition section 16 and the orthogonal mode coupler 42 can be rotated arbitrarily at 360 degrees, while the waveguide-coaxial converter 41 and the diaphragm circular polarizer 43 are in a fixed state.

[0023] In this embodiment, the waveguide-coaxial converter such as figure 1 As shown, the waveguide-coaxial converter converts the TE10 mode input from the standard rectangular waveguide port 11 into the TEM mode in the coaxial line 12, and then...

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Abstract

The invention provides a Ku-band constant-amplitude phase modulating feed component, and belongs to the field of electronic communication. The component is used for a feed network of an antenna and mainly comprises a partition circular polarizer, an orthogonal mode coupler, a rotary joint, a mode converter and the like, wherein the orthogonal mode coupler (OMT) is connected with the rotary joint and is used for generating linear polarization in a random direction and feeding the linear polarization into a square waveguide port of the partition circular polarizer. When the OMT rotates to different angles, the partition circular polarizer outputs two paths of signals which are the same in amplitude and of which the phase difference changes along with the angle, and has the function similar to that of a phase shifter as a whole. The ku-band constant-amplitude phase modulating feed component can be applied to a dual circularly polarized antenna, so that left-hand circular polarization and right-hand circular polarization are combined into linear polarization at a random angle. An in-band transmission system disclosed by the invention is good in flatness, small in loss, good in amplitude / phase consistency, wide in frequency application range, high in use reliability and suitable for a transmitting and receiving system of an on-the-move communication antenna.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a ku-band equal-amplitude phase modulation feed source assembly. Background technique [0002] Most antennas in motion have the characteristics of low profile, and the radiators are mostly in the form of flat plate arrays or cylindrical paraboloids. Regardless of the form, the antenna has a narrow beam width in the azimuth plane, which cannot be adjusted by rotating the antenna. polarization, so there must be a separate component for polarization tracking. According to the principle of polarization synthesis of electromagnetic waves, linearly polarized waves at any angle can be synthesized by mutually orthogonal linearly polarized waves, or by equal-amplitude left-handed and right-handed polarized waves. The former is realized by adjusting the power of two orthogonal linearly polarized signals, and the latter is realized by adjusting the phase difference of left / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/24H01Q1/50
CPCH01Q1/50H01Q15/24
Inventor 付平韩雪吴成才郑华山张洪才李鹏
Owner BEIJING AEROSPACE GUANGHUA ELECTRONIC TECH CO LTD
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