Small side-feed antipodal Vivaldi antenna with resistor loading

Abstract

The invention belongs to the ultra wide band antenna technology in the field of airborne communication and particularly relates to a small side-feed antipodal Vivaldi antenna with resistor loading. The antenna is a microstrip antenna with a simple structure and is formed by the order stacking of an upper layer metal layer, a medium base plate, and a lower layer metal layer. According to the antenna, on the basis of a traditional antipodal Vivaldi antenna, a feeder is bent to a side, the size of the antenna is reduced greatly, and the miniaturization degree is raised. The width of the feeder is changed in a step way, and thus the antenna maintains good input impedance matching in a wider bandwidth. The directivity is improved by using the modes of resistor loading and a parasitic patch. A loading metal with a special shape is used, and thus a high gain is maintained while the directivity is improved.

Description

technical field [0001] The invention belongs to the ultra-wideband antenna technology in the field of airborne communication, and in particular relates to a miniaturized side-fed pair-toed Vivaldi antenna loaded with resistance. Background technique [0002] Modern aircraft usually carry a large amount of surveillance and communication equipment, which requires a greater number of antennas for data exchange and communication links. However, the number of antennas that can be installed on the aircraft is very limited due to space constraints and the need to prevent interference between antennas. Therefore, airborne antennas urgently need to meet the communication requirements of miniaturization and broadband. In addition, the aircraft needs to have a long communication distance, which requires the antenna to meet good directional characteristics. [0003] The Vivaldi antenna is such a type of antenna with high gain, strong directivity, and wide bandwidth. However, in the u...

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Problems solved by technology

However, in the ultra-wideband antennas in the current market, it is difficult to meet the requirements of miniaturization and good directional characteristics.

For example, in the literature "Y-shaped slot loading miniaturized ultra-wideband Vivaldi end-fire antenna" (Journal of Air Force Engineering University, April 2015, Volume 16, No. 2, p73~p77), by loading Y-shaped slots on both sides of the radiation patch The method, the surface current of the antenna is concentrated near the slot line, so that the radiation characteristics of the antenna are significantly improved, but the back lobe radiation is large and the radiation efficiency is low

The literature "Improved design of balanced paired Vivaldi antenna" (Electronic Components and Materials, April 2014, Volume 33 No. 4, p37~p39), based on the conventional balanced paired Vivaldi antenna, by loading a semi-elliptical medium The plate and the asymmetrical semi-elliptical slots have improved the directional characteristics of the antenna very well, with high gain and strong directivity, but it is relatively poor in miniaturization.

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