In this work, transmission coefficient S21 was measured through a waveguide. The electromagnetic wave entered into a waveguide through a horn at one end and it was measured at the other end. By inserting a parasitic dipole inside the waveguide, the wave amplitude at lower adjacent frequency of dipole resonant was amplified. This effect is similar to that of Yagi-Uda antenna in open space. It is stated in textbook that a Yagi-Uda antenna can diffract the electromagnetic wave in open space and focus the power in forward direction. However, a dipole inside a waveguide cannot diffract electromagnetic wave from the open space. The observation in this work indicated that the wave was amplified by the parasitic dipole.
Comments: 4 Pages.
[v1] 2018-03-01 22:40:27
Unique-IP document downloads: 28 times
Vixra.org is a pre-print repository rather than a journal. Articles hosted may not yet have been verified by peer-review and should be treated as preliminary. In particular, anything that appears to include financial or legal advice or proposed medical treatments should be treated with due caution. Vixra.org will not be responsible for any consequences of actions that result from any form of use of any documents on this website.
Add your own feedback and questions here:
You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.