Antenna for secret communication

Abstract

The invention discloses an antenna for secret communication, which is characterized in that the antenna is applicable to a very high frequency / ultrahigh frequency band and comprises an antenna structure and a sequence feed structure, the antenna structure works at the same frequency and generates a directional diagram of a noise radiation zero point, the sequence feed structure realizes directional circular polarization radiation, and the specific direction is a direction of the noise radiation zero point. The antenna structure comprises a monopole radiator, wherein the top end of the monopolar radiator is loaded with a disc, the bottom end is loaded with a ground plate, the upper surface of the disc is provided with a radiation patch, and the radiation patch is loaded with a gap or a capacitor for adjusting the frequency; and the ground plate and the disc are provided with the sequence feed structure therebetween which is connected with the radiation patch for feeding. The antenna is simple in structure and can meet the requirements of secret communication without forming an array.

Description

technical field [0001] The invention relates to the field of communication antennas, in particular to an antenna for secure communication. Background technique [0002] Nowadays, with the rapid development of wireless communication technology, information security becomes more and more important. In order to ensure the security and confidentiality of information transmission, confidential communication, as an important means of data transmission protection, is also playing an increasingly important role in the field of information security. The traditional method of increasing the security of wireless communication mainly focuses on various digital coding technologies, but with the rapid development of the computer field, there are more and more algorithms for cracking codes, and the efficiency is getting higher and higher. severe impact. [0003] In fact, the most efficient way to achieve secure communication is to cover only the designated space with the confidential inf...

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Problems solved by technology

[0005] (1) They are all array antennas, with many antenna units, large volume, and high cost, and the feed network part of the unit needs to design power splitters and phase shifters, and the design process is complicated

[0006] (2) The above two designs use two types of antennas to realize the transmission of noise signals and confidential signals respectively. The integration of the antennas is low, and it is difficult to achieve miniaturization, and it is difficult to meet the requirements of VHF / UHF bands. Miniaturized application

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