Hemisphere lens-loaded Vivaldi antenna for time domain microwave imaging of concealed objects
| Autor: | B N Abhijith, Mohammad Jaleel Akhtar, Zubair Akhter |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Coaxial antenna business.industry 020208 electrical & electronic engineering Antenna measurement Antenna aperture Astrophysics::Instrumentation and Methods for Astrophysics General Physics and Astronomy 020206 networking & telecommunications 02 engineering and technology Electronic Optical and Magnetic Materials law.invention Periscope antenna Radiation pattern Optics law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Antenna (radio) Omnidirectional antenna Vivaldi antenna business Computer Science::Information Theory |
| Zdroj: | Journal of Electromagnetic Waves and Applications. 30:1183-1197 |
| ISSN: | 1569-3937 0920-5071 |
| DOI: | 10.1080/09205071.2016.1186574 |
| Popis: | The hemisphere lens-loaded Vivaldi antenna for the microwave imaging applications is designed and tested in this paper. The proposed antenna is designed to work in the wide frequency band of 1–14 GHz, and is fabricated on the FR-4 substrate. The directivity of the proposed Vivaldi antenna is enhanced using a hemispherical shape dielectric lens, which is fixed on the end-fire direction of the antenna. The proposed antenna is well suited for the microwave imaging applications because of the wide frequency range and high directivity. The design of the antenna is carried out using the CST microwave studio, and various parameters such as the return loss, the radiation pattern, the directivity, and input impedance are optimized. The maximum improvement of 4.19 dB in the directivity is observed with the designed hemisphere lens. The antenna design is validated by fabricating and testing it in an anechoic environment. Finally, the designed antenna is utilized to establish a setup for measuring the scatter... |
| Databáze: | OpenAIRE |
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