A Compact Sequential-Phase Feed Using Uniform Transmission Lines for Circularly Polarized Sequential-Rotation Arrays
Journal
Ieee Transactions on Antennas and Propagation
Journal Volume
59
Journal Issue
7
Pages
2721-2724
Date Issued
2011
Author(s)
Lin, S. K.
Abstract
A compact sequential-phase (SP) feed for circularly polarized sequential-rotation (SR) arrays is presented. Unlike traditional SP feed using multiple segments for impedance transformations, the presented SP feed employs only a single-stage transition where the transmission line width is uniform, making the whole SP feed very compact and neat in layout. The radial design of SP-feed lines to antenna elements may further facilitate the optimization work in adjusting the element spacing. Two miniature square SP feeds of the sizes λg}/4 and 3 λg}/8 are given and compared. Experimental prototypes were built and verified with measured results. The proposed compact SP feed can be extended to 2N× 2Nfeeding networks, and is very suitable for large-scale printed CP arrays. © 2011 IEEE.
Type
journal article