Broadband dual varactor diode-loaded elliptical slot antenna with an orthogonal feed at K-band

Author

Baumgartner, Matthias ; Ghasr, Mohammad Tayeb ; Zoughi, Reza

Author_Institution

Electr. & Comput. Eng. Dept., Missouri Univ. of Sci. & Technol., Rolla, MO, USA

fYear

2013

fDate

6-9 May 2013

Firstpage

635

Lastpage

640

Abstract

An orthogonally-fed, small elliptical slot antenna loaded by a varactor diode, and operating in K-band frequency range (18 - 26.5 GHz), is designed for use in synthetic aperture radar imaging arrays. The broadest dimensions of the antenna are restricted to being less than λ/2 as a consequence of required spacing in an imaging array. The feed design uses a coplanar waveguide with a 90° bend without a direct DC connection to the antenna. The final slot employs two varactor diodes resulting in 3.5 GHz of bandwidth suitable for microwave 3D holography imaging.

Keywords

broadband antennas; diodes; holography; microwave antennas; radar imaging; slot antennas; synthetic aperture radar; varactors; broadband dual varactor diode-loaded elliptical slot antenna; coplanar waveguide; direct DC connection; feed design; frequency 18 GHz to 26.5 GHz; frequency 3.5 GHz; microwave 3D holography imaging; orthogonal feed; orthogonally-fed antenna; small elliptical slot antenna; synthetic aperture radar imaging arrays; varactor diodes; Antenna arrays; Feeds; Imaging; Resonant frequency; Slot antennas; Varactors; Elliptical slot; loaded slot; microwave imaging; orthogonal coplanar waveguide feed; resonant slot; tunable antenna; varactor diode;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2013 IEEE International

Conference_Location

Minneapolis, MN

ISSN

1091-5281

Print_ISBN

978-1-4673-4621-4

Type

conf

DOI

10.1109/I2MTC.2013.6555493

Filename

6555493