Title :
A directly fed Ku- to W-Band 2-Arm Archimedean spiral antenna
Author :
Mruk, Joseph R. ; Saito, Yuya ; Kim, Kichul ; Radway, Mathew ; Filipovic, Dejan
Author_Institution :
Appl. EM & Antenna Lab., Univ. of Colorado at Boulder, Boulder, CO, USA
Abstract :
An 18 to 110 GHz two-arm Archimedean spiral antenna is directly fed using a monolithic ally integrated micro- coaxial Dyson balun. The feed line includes a multi-stage impedance transformer realized to match the nominal impedance of the antenna to 50 Ω. The antenna is designed for and fabricated with a surface micromachining process PolyStrata™ using a predetermined strata configuration. Impedance measurements of the antenna are performed up to 110GHz, with a VSWR <; 2.5:1 achieved throughout the entire measured frequency band. The performance of a similar antenna with a custom tailored strata configuration was also discussed.
Keywords :
antenna feeds; electric impedance measurement; micromachining; microwave antennas; spiral antennas; directly fed Archimedean spiral antenna; feed line; frequency 18 GHz to 110 GHz; impedance measurements; monolithic ally integrated microcoaxial Dyson balun; multistage impedance transformer; surface micromachining process; Antenna measurements; Antennas; Conductors; Fabrication; Impedance; Impedance measurement; Spirals; 2-arm Archimedean; Spiral antenna; W-band; millimeter-wave;
Conference_Titel :
Microwave Conference (EuMC), 2011 41st European
Conference_Location :
Manchester
Print_ISBN :
978-1-61284-235-6
