Tree access delay line resistor loading tapered slot line pulse antenna

Abstract

The invention discloses a tree access delay line resistor loading tapered slot line pulse antenna, which consists of tapered slot line radiation patches (1), a dielectric substrate (2), a micro-strip feed line (3), tree access lines (4), delay lines (5) and loading resistors (6); the edges of a gap between two patches are expanded to form a flared opening; the maximum positions of the tail openings of the patches are radiation tail ends (8), and the other end of the gap opening is an open-circuit end of a slot line (9); one end of a micro-strip (3) is a feed end (10), and the other end of the micro-strip (3) is a transition section (11) from the micro-strip to the slot line; the access lines (4) and the delay lines (5) are positioned in the back area of the substrate (2) of the two patches; the branches of the access lines (4) of each area are gathered at a gathering point (13), and the tail ends of the branches are connected with the tail ends (8) through metallized through holes (14); and one end of each of the delay lines (5) is connected with the gathering point (13), the other ends of the delay lines (5) are open-circuited, and the loading resistors (6) are distributed on the delay lines (5). The antenna can reduce the amplitude of trailing pulse.

Description

technical field [0001] The invention relates to a pulse antenna, in particular to a tree-shaped access delay line resistance-loaded tapered slot line pulse antenna, which belongs to the technical field of pulse antenna manufacture. Background technique [0002] When the pulse antenna radiates a pulse signal, during the period when the pulse current flows from the antenna input terminal to the antenna end, if the pulse antenna cannot radiate all the electromagnetic energy, there will be remaining unradiated pulse current at the antenna radiation end. The remaining pulse current will return along the original path in the antenna, and continue to radiate electromagnetic energy in the process thereafter, thus forming a tailing pulse. When the pulse antenna is used in ground penetrating radar, these tailing pulses overlap with the signal from the target in the time domain, thereby causing interference to the target signal, so measures are usually taken to reduce the influence of ...

AI Technical Summary

Problems solved by technology

Most of the existing resistance loading is distributed loading. At this time, the resistance is located between the feed point of the antenna and the radiation end. The load resistance absorbs the remaining pulse energy at the radiation end of the antenna and also absorbs the pulse energy that could have been radiated. Therefore, the use of this resistance loading will reduce the radiation efficiency of the antenna

At the same time, the size of the radiation end of the tapered slot line pulse antenna is relatively large, and the distribution range of the terminal current is large. A small amount of resistance loading placed between the feed point and the radiation end cannot effectively absorb the remaining pulse current at the end of the antenna, thereby reducing the tailing. Limited improvement in pulse adverse effects

Moreover, when the working frequency band of the antenna is high, the size of the antenna is small, and it is difficult to set up multiple long connections

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