Phase delay linetype reflector element based reflective array antenna

Abstract

The invention provides a phase delay linetype reflector element based reflective array antenna. The reflective array antenna comprises a pyramid horn feed source and a reflector array, wherein the reflector array is formed by periodically arranging a plurality of phase delay linetype reflector elements in a mirror symmetry manner; and the phase delay linetype reflector element structure comprises two slotting circular ring nests and two phase delay lines that are in opposite in positions. The gain bandwidth of the reflector array antenna is greatly increased, an ultra wide band antenna is realized, and cross polarization is effectively restrained as well; and in addition, the reflection array antenna provided by the invention adopts a single-layer dielectric substrate structure, so that the reflector array is simple in structure, easy to process, low in cost and light in weight.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a microstrip reflection array antenna, in particular to a reflection array antenna based on a phase delay line reflection unit. Background technique [0002] In recent years, microstrip reflectarray antenna technology has been widely used in radar and communication fields due to its outstanding advantages. However, the reflectarray antenna also has some shortcomings, the most important of which is its relatively low bandwidth. There are two reasons for the low bandwidth of the reflectarray antenna: the narrowband characteristics of the microstrip antenna unit itself and the non-constant electrical length of the path between the feed source and the reflector unit. For mid-size reflectarray antennas, the first reason is the most important. [0003] In order to overcome the shortcoming of the narrow frequency band of the reflectarray antenna, many methods have been proposed by the ...

AI Technical Summary

Problems solved by technology

Although the prior art has proposed some phase-delay linear reflectors that can improve the bandwidth of the reflectarray antenna to a certain extent (see references H.Hasani, M.Kamyab, and A.Mirkamali, "Lowcross-polarizationreflectarrayantenna," IEEETrans.AntennasPropag ., vol.59, no.5, pp.1752–1756, May 2011 and references R. Shamsaee and Z. Atlasbaf, “Design and implementation of broadband single layer circularly polarized reflect array antenna,” IEEE Antennas Wireless Propag. Lett., vol.11, pp.973–976, 2012), but Compared with other methods of improving the bandwidth of reflectarray antennas, there is no obvious advantage

The resonant structure adopted by the existing phase delay line reflector has a circular patch or ring structure, which cannot further improve the gain bandwidth of the reflect array, and also has the disadvantage of large cross-polarization components, which makes the phase delay line unit type Microstrip reflectarray antennas still have certain limitations

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