Title :
Dual-polarized K/Ka-band planar log-periodic antenna
Author :
Zhou, Hongyu ; Wang, Yunda ; Lee, Yung-Chen ; Filipovic, Dejan S.
Author_Institution :
Dept. of Electr., Comput., & Energy Eng., Univ. of Colorado at Boulder, Boulder, CO, USA
Abstract :
This paper demonstrates an 18-40 GHz four-arm planar log-periodic antenna with integrated wideband hybrid fabricated using printed circuit board (PCB) process. The two orthogonal linear polarizations are obtained by exciting the log-periodic structure with two microstrip lines perpendicularly oriented in two PCB layers. Two circular polarizations are obtained by monolithically integrating a quadrature hybrid with the antenna. The antenna with hybrid achieves return loss greater than 11dB, gain around 3dBi, and good radiation pattern consistency throughout the bandwidth.
Keywords :
antenna radiation patterns; broadband antennas; log periodic antennas; microstrip lines; planar antenna arrays; polarisation; printed circuits; PCB layers; antenna radiation pattern consistency; circular polarizations; dual-polarized K-Ka-band antenna; four-arm planar log-periodic antenna; frequency 18 GHz to 40 GHz; integrated wideband hybrid antenna; log-periodic structure; microstrip lines; orthogonal linear polarizations; printed circuit board process; quadrature hybrid antenna; Antenna radiation patterns; Broadband antennas; Microstrip antennas; Scattering parameters; Wideband; hybrid; log-periodic antenna; millimeter-wave; polarization; wideband;
Conference_Titel :
Antennas and Propagation (EUCAP), 2012 6th European Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0918-0
Electronic_ISBN :
978-1-4577-0919-7
DOI :
10.1109/EuCAP.2012.6205941
