For the purpose of this article, only a qualitative description of the traveling wave mode Vivaldi antenna is attempted.īriefly, the traveling wave mode Vivaldi antenna provides a smooth transition between the guided wave traveling in the slot transmission line (slotline) and the plane wave, which is radiated. 4 Interested readers are referred to the book by Lee and Chen, 4 which provides an overview of the tapered slot antenna (TSA) and its many variations. ![]() The operation of the Vivaldi antenna itself is not yet fully understood. The Vivaldi (end fire exponentially tapered slot) antenna array is a promising candidate for this application since it has been shown to exhibit the desired characteristics: a broadband pattern, broadband impedance and high cross-polarization isolation. Also, since the dipoles are inherently narrow band, it is quite desirable to replace them with a broadband dual polarized antenna. However, as the frequency gets higher (a few gigahertz), the dipoles become more tedious to construct due to their small size. ![]() Cross-polarization isolation in excess of 20 dB can be achieved with these dual dipoles. Otherwise, the antenna under test (AUT) would need to be rotated for each polarization, making the test twice as long.Ĭurrently, dual polarized dipoles are used to achieve fast characterization. PB - Institute of Electrical and Electronics Engineers Inc.Because of the need for quick characterization of antennas in the ATR, it is desirable to have a receiving antenna that can be electronically switched to receive E φ or E θ. ![]() T3 - IEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science MeetingīT - IEEE Antennas and Propagation Society International Symposium Also presented is a method for defining the DETSA dimensions in terms of ratios, so design features of different DETSAs can be quantified and their performance compared. It has been found that careful design of the DETSA can give improved directivity and half power beamwidth (HPBW) performance over the Vivaldi antenna. In this paper a performance characterization for the DETSA is presented. Very little has been published on the dual exponentially tapered slot antenna (DETSA), originally referred to as a wideband bunny-ear element. Most published work has been limited to the linearly tapered slot and Vivaldi antennas. Also presented is a method for defining the DETSA dimensions in terms of ratios, so design features of different DETSAs can be quantified and their performance compared.ĪB - Tapered slot antennas are simple planar structures with broadband characteristics that are typically used in arrays for radar applications, mobile satellite communications and phased arrays. N2 - Tapered slot antennas are simple planar structures with broadband characteristics that are typically used in arrays for radar applications, mobile satellite communications and phased arrays. T1 - Characterization and design methodology for the dual exponentially tapered slot antenna
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |