Novel small structure for low profile antenna by analogy with EBG structure

Author

Higaki, Makoto ; Yamada, Akiko ; Inoue, Kazuhiro ; Obayashi, Shuichi ; Sekine, S. ; Shoki, Hiroki ; Morooka, Tasuku

Author_Institution

Toshiba R&D Center, Toshiba Corp., Tokyo

fYear

2008

fDate

5-11 July 2008

Firstpage

1

Lastpage

4

Abstract

By using the image theorem, the relation between the reflection phase of an infinite plane and the input impedance of the dipole antenna just above the plane has been discussed. It has been confirmed that the dipole antenna matches with 50 Omega when the reflection phase is around pi/2, and it is similar to the dipole antenna above an EBG structure. We have proposed the novel small structure which enables the dipole antenna to lay in low profile to the ground plane. The proposed structure rotates the reflection phase through a frequency band and the dipole antenna just above the structure matches with 50 Omega when the reflection phase is around pi/2. It is concluded that the periodicity of an EBG structure is NOT indispensable to realize a low profile antenna.

Keywords

dipole antennas; photonic band gap; EBG structure; dipole antenna; image theorem; infinite plane; input impedance; low profile antenna; reflection phase; Dipole antennas; Frequency; Impedance; Metamaterials; Periodic structures; Photonic band gap; RLC circuits; Reflection; Reflector antennas; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE

Conference_Location

San Diego, CA

Print_ISBN

978-1-4244-2041-4

Electronic_ISBN

978-1-4244-2042-1

Type

conf

DOI

10.1109/APS.2008.4619316

Filename

4619316