High-gain antipodal Vivaldi antenna

Abstract

The invention belongs to the field of antennas, and provides a high-gain antipodal Vivaldi antenna. The high-gain antipodal Vivaldi antenna comprises a dielectric substrate, a balance feed Balun, an upper-layer radiation patch and a lower-layer radiation patch, wherein an antenna radiation aperture is further provided with a director, and the director is composed of two composite metal patches which are positioned on the upper and lower surfaces of the dielectric substrates and arranged in a correspondingly overlapped manner; and each composite metal patch is formed by intersecting a small oval metal patch and a large oval metal patch, the small oval metal patch is close to the antenna radiation aperture, and the large oval metal patch is away from the antenna radiation aperture. The high-gain antipodal Vivaldi antenna introduces the director at the antenna radiation aperture on the basis of a traditional antipodal Vivaldi antenna, and replaces exponential curves of internal flanges of the upper-layer radiation patch and the lower-layer radiation patch with composite exponential curves, thereby realizing the purpose of expanding antenna bandwidth and improving antenna gain and directionality.

Description

technical field [0001] The invention belongs to the field of antennas, relates to broadband antennas, and specifically provides an antipodal Vivaldi antenna (Antipodal Vivaldi Antenna, AVA) based on a director and a novel composite exponential curve, so as to expand the bandwidth of the antenna and improve the gain and directivity of the antenna. Purpose. [0002] technical background [0003] The antenna is an essential part of various radio equipment, it can effectively radiate or receive radio waves and connect with the transceiver system through the feeder, and play the role of energy conversion. As the front-end component of the communication system, the antenna is called the "eye" in the communication system, which largely restricts the development of the entire communication technology. The bandwidth, gain and directivity of the antenna are very important indicators. Researchers hope to achieve the highest possible gain and good directivity under the premise of ensuri...

AI Technical Summary

Problems solved by technology

[0008] The third is that the researcher R. Natarajan increases the electrical length by opening a defect structure on the radiation patch of the antenna, so that the volume of the antenna is reduced while ensuring the working bandwidth of the antenna, but its gain is small. See the literature " R.Natarajan, J.V.George, M.Kanagasabai, and A.K.Shrivastav, "A Compact AntipodalVivaldi Antenna for UWB Applications," Antennas and Wireless Propagation Letters, IEEE, Volume: 14, 2015";

[0009] Among the above three methods, the working frequency band of the antenna realized by the first method is 2-32GHz, the working frequency band of the antenna realized by the second method is 1-35GHz, and the working frequency band of the antenna realized by the third method is 3.7-18GHz; Although the gain of the first type of antenna has been greatly improved, there is still a lot of room for improvement in the performance of the high frequency band; although the second type of antenna has widened the bandwidth of the antenna, it still cannot work in the Ka band and above frequency bands, and its gain is also small ;The gain of the third antenna is small (less than 7dBi), and it cannot work in a higher frequency band; so these three antennas have their own limitations

Images