Multimode multifunctional communication and navigation common-caliber integrated antenna

Abstract

The invention relates to the technical field of microwave antennas, and discloses a multimode multifunctional communication and navigation common-caliber integrated antenna. The antenna comprises a discone body, a metal cavity, a first feed connector, a metal disc, a plurality of metal short-circuit columns, a second feed connector, a microstrip antenna and a connecting piece, the discone body serves as a communication antenna, and the microstrip antenna is a navigation antenna. the discone body is embedded in the metal cavity and is coaxial with a bottom plate of the metal cavity, the first feed connector penetrates through the center of the bottom plate of the metal cavity and is connected with the center of the lower end of the discone body, and the metal disc is arranged at the upper end of the discone body and is connected with the bottom plate of the metal cavity through a plurality of metal short-circuit columns. Any one of the plurality of metal short-circuit columns is provided with a through hole, the second feed connector is arranged on the bottom plate of the metal cavity and passes through the through hole to feed the microstrip antenna, and the microstrip antenna is arranged on the metal disc and is fixedly connected with the plurality of metal short-circuit columns through connecting pieces. Therefore, the common-caliber integrated design of the communication antenna and the navigation antenna can be realized.

Description

Technical field[0001]The invention relates to the technical field of microwave antennas, in particular to a multi-mode multi-function communication and navigation common-aperture integrated antenna.Background technique[0002]Aircraft are usually equipped with various antennas such as measurement and control communications, satellite communications, and satellite navigation. Generally speaking, aircraft measurement and control communication antennas need to have 360-degree azimuthal omnidirectional coverage capabilities to adapt to changes in antenna orientation caused by aircraft maneuvers. Satellite navigation antennas are usually installed on the top of the aircraft in the form of microstrip antennas, and they need to have the upper half of the space. Beam coverage capability, used to receive satellite signals. Various antennas of common aircraft communication systems are all independent structures, which have the disadvantages of large space occupation, high cost, and poor electro...

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Problems solved by technology

However, the isolation between antennas in different frequency bands is poor, and different beam directions required by different functions cannot be flexibly realized. Especially for aircraft measurement and control communication systems that require omnidirectional beam coverage, it is difficult to achieve a single microstrip antenna.

The measurement and control communication antenna in the form of microstrip generally needs to synthesize an omnidirectional pattern through dual antennas, that is, a microstrip antenna is arranged on the left and right sides, and the two antennas are simultaneously fed through a power divider to form omnidirectional beam coverage. , but this will lead to too many windows on the surface of the aircraft and increase the complexity of the system. At this time, if other antennas such as navigation antennas are integrated into the measurement and control communication antennas on the left and right sides of the aircraft, it will be difficult to achieve the required beam to the upper half space cover

[0003] For measurement and control communication antennas, in addition to the combination of dual microstrip antennas, other common antennas that can form omnidirectional patterns include half-wave dipoles, monopoles, and inverted F antennas, but these antennas are difficult to implement. Conformal design usually needs to protrude from the surface of the aircraft, which will affect the aerodynamic performance of the aircraft, and the antenna form of this type of rod structure is not easy to integrate with other communication system antennas.

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