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Size-reduction and suppression of cavity-resonances in hybrid mm-wave antennas for polarimetric measurements

Published online by Cambridge University Press:  24 April 2014

Sebastian Methfessel  and
Lorenz-Peter Schmidt
Sebastian Methfessel*
Affiliation:
Institute of Microwaves and Photonics, University of Erlangen-Nuremberg, Cauerstr. 9, 91058 Erlangen, Germany. Phone: +49 9131 85 25473
Lorenz-Peter Schmidt
Affiliation:
Institute of Microwaves and Photonics, University of Erlangen-Nuremberg, Cauerstr. 9, 91058 Erlangen, Germany. Phone: +49 9131 85 25473
*
Corresponding author: S. Methfessel Email: sebastian.methfessel@fau.de
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Abstract

Size and feed structure are some of the important constraints for using antenna-elements in multi-element two-dimensional arrays, where easy planar integration and appropriate matching with transceiver chips are essential. This applies especially when differential signaling and adaptable polarization are required. Based on a balanced-fed patch-excited cavity-backed horn antenna (hybrid antenna), feeding concepts, and approaches to reduce size are discussed and evaluated in this paper. The influence of the substrate-integrated cavity is analyzed and methods to overcome the restrictions are presented, together with simulated and measured results. The antenna elements are evaluated with regard to their use in multistatic and polarimetric sparse arrays, which will be briefly introduced. The optimized antennas achieve 10 dB return loss, a gain of more than 5 dBi as well as symmetric and homogeneous radiation patterns in amplitude and phase with low cross-polarization in the desired frequency-band of operation between 70 and 80 GHz.

Keywords

Antenna designModeling and measurementsRadar applications
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 6 , Issue 3-4: European Microwave Week 2013 , June 2014 , pp. 343 - 351
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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References

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