Band Rejection Methods for Planar Log-Periodic Antennas

Author

Mruk, Joseph R. ; Kefauver, W. Neill ; Filipovic, Dejan S.

Author_Institution

Dept. of Electr., Comput., & Energy Eng., Univ. of Colorado, Boulder, CO, USA

Volume

58

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

2288

Lastpage

2294

Abstract

Full-wave modeling and measurements are utilized to propose three band rejection techniques integrated with a multi- octave wideband planar log-periodic antenna. Antennas presented in this paper are designed to operate between 1.8 and 11 GHz with rejection at 6 GHz. Demonstrated band-rejection techniques include the removal of resonant teeth also referred to as aperture rejection, integration of a dual band filter, and combination of the two above techniques. Aperture rejection is shown to produce greater than 25 dB realized gain reduction. Integrated filter and combined methods achieve over 30 dB and 55 dB rejections, respectively. Antennas are fabricated on a 0.508 mm RT/Duroid 6002 substrate and excellent agreement between theory and measurements is obtained.

Keywords

log periodic antennas; planar antennas; aperture rejection; band rejection method; dual band filter; full-wave modeling; integrated filter; multi-octave wideband planar log-periodic antenna; planar log-periodic antennas; resonant teeth; Antenna measurements; Antenna theory; Apertures; Broadband antennas; Dual band; Filters; Gain; Log periodic antennas; Resonance; Teeth; Dual band; integrated filter; log periodic antenna; multiple band;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2010.2048873

Filename

5454304