Miniaturized Discocone Antenna Based on Non-Foster Matching Circuit

Abstract

The present invention claims a miniaturized disc-cone antenna based on a non-Foster matching circuit. The whole design includes a miniaturized disc-cone antenna and a non-Foster matching circuit. The non-Foster matching circuit includes a negative impedance converter, a transformer and The buffer circuit uses a broken line structure to replace the rib structure of the traditional disc cone antenna, which makes the antenna miniaturized, and on this basis, a non-Foster matching circuit is added to improve the performance of the antenna. The broken line structure increases the current path without increasing the size of the antenna, reduces the size of the antenna, introduces a non-Foster matching circuit to reduce the reflection coefficient of the antenna, and improves the transmission coefficient of the antenna. The invention can effectively solve the problem of excessive size of the antenna in the ultrashort wave communication, help reduce the cost of manufacturing and erecting the antenna in the ultrashort wave communication, and improve the radiation efficiency of the antenna.

Description

technical field [0001] The invention belongs to the field of antenna design in ultrashort wave communication, in particular the miniaturization design and non-Foster matching circuit design of disc cone antenna in ultrashort wave communication. Background technique [0002] Ultrashort wave communication is the most basic and important means of communication in vehicle and shipborne communication systems. The antennas used in ultrashort wave communication work in lower frequency bands and have longer operating wavelengths. The size of the antenna corresponding to the conventional half-wavelength theory is large. This greatly increases the size and production cost of the antenna. To solve this problem, antenna miniaturization is often used in engineering applications to reduce the size of the antenna. The electrical performance of the antenna is related to its electrical size. When the electrical size of the antenna decreases, the input reactance of the antenna will increase,...

AI Technical Summary

Problems solved by technology

The non-Foster matching circuit mainly converts the reactive part of the antenna through the negative impedance element generated by the negative impedance converter, but when it is used to match the antenna at the transmitting end, it will be affected by the reflected signal of the antenna, and the circuit is susceptible to interference. In severe cases, the circuit will be damaged. This is also a technical difficulty that the non-Foster matching circuit applied to the transmitting antenna needs to solve, because the passive matching scheme cannot effectively improve the performance of the antenna. The root cause is the limitation of the gain bandwidth theory, not the Foster The special matching circuit can break through the limit of this theory, so I thought of using this circuit

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