Extremely-low-frequency high-power transmitting system

A transmission system, high-power technology, applied in the field of low-frequency signals, which can solve the problems of large measurement error, shallow detection depth, and unsatisfactory detection effect.

Active Publication Date: 2021-05-18
武汉船舶通信研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, through the electromagnetic detection method of the extremely low frequency signal transmission system, the anti-interference ability is weak, t...

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Embodiment Construction

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0042] In the following introduction, the terms "first" and "second" are only used for the purpose of description, and should not be understood as indicating or implying relative importance. The following description provides multiple embodiments of the present invention, and different embodiments can be replaced or combined in combination, so the present invention can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment contains features A, B, C, and another embodiment contains features B, D, then the invention should also be considered to include all other possible combinations containing one or more of A, B, C, D Although this embodiment may not be clearly written in the following content.

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Abstract

The invention discloses an extremely-low-frequency high-power transmitting system. The system comprises a high-precision exciter, a signal processing unit, a transmitting host, a change-over switch, a tuning device and a dummy load; the tuning device is connected with a transmitting antenna; the transmitting host comprises two power amplifier units which are arranged in a dual-frequency-band dual-power-bridge cascading mode, and the two power amplifier units are used for conducting high-power signal synthesis on the extremely-low-frequency band and the ultra-low-frequency band on a power amplifier circuit of the same transmitting host. According to the invention, the high-power extremely-low-frequency emission host with extremely-low-frequency and ultra-low-frequency dual-band dual-power bridge cascade power synthesis is designed, and efficient synthesis of extremely-low-frequency and ultra-low-frequency (0.1-300Hz) dual-band 500kW high-power signals is realized on the same main power circuit. A combined tuning method of direct coupling, capacitance tuning and matching tuning is designed to perform matching tuning with a horizontal low-rack transmitting antenna as long as hundreds of kilometers, so that impedance matching tuning of a full-frequency-point horizontal low-rack transmitting antenna within a wide frequency range of 0.1Hz to 300Hz and efficient radiation of high-power extremely/ultra-low frequency signals are realized.

Description

technical field [0001] The present application relates to the field of low-frequency signal technology, in particular, to an extremely low-frequency high-power transmission system. Background technique [0002] The low-frequency signal propagates around the world in the form of a waveguide between the earth and the ionosphere. According to the regulations of the ITU, the frequency band of the extremely low-frequency signal is 3Hz to 30Hz. The extremely low-frequency signal can penetrate deep seawater and formations, and the propagation loss of the extremely low-frequency electromagnetic wave is small. The attenuation in the atmosphere is less than 1dB / 1000km. Extremely low frequency electromagnetic wave is a kind of low frequency electromagnetic wave (0.1Hz~300Hz) which is artificially generated with a radiation range of thousands of kilometers and a high signal-to-noise ratio. At present, through the electromagnetic detection method of the extremely low frequency signal tr...

Claims

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Application Information

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IPC IPC(8): H04B1/04H04B1/036H02M1/12H02J9/06H04B7/06
CPCH04B1/0483H04B1/0458H04B1/036H02J9/06H02M1/12H04B7/0602Y02D30/70
Inventor 刘勇刘庆饶斯韬李纵王亚维
Owner 武汉船舶通信研究所
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