A Sequential-Phase Feed Using a Circularly Polarized Shorted Loop Structure
- 16 November 2012
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 61 (3) , 1443-1447
Abstract
This communication presents a new 4-port feeding structure with sequential phase (SP) of 0°, 90°, 180° and 270 using a circularly polarized (CP) shorted loop. A 2 × 2 single-fed circularly polarized cornertruncated patch array is connected to the loop's four shorting strips, which serve as 4 feeding ports with stable phase difference. By using the proposed SP feed, the axial ratio (AR) bandwidth of the array is increased to more than 7%, wider than the previous design. A prototype of the proposed antenna is built to validate the design experimentally, and a global bandwidth of 4.86-5.12 GHz is achieved (S11 ≤ -10 dB, <;3 dB, and gain variation within 3 dB).Keywords
This publication has 16 references indexed in Scilit:
- Axial Ratio Enhancement for Circularly-Polarized Millimeter-Wave Phased-Arrays Using a Sequential Rotation TechniqueIEEE Transactions on Antennas and Propagation, 2011
- A Compact Sequential-Phase Feed Using Uniform Transmission Lines for Circularly Polarized Sequential-Rotation ArraysIEEE Transactions on Antennas and Propagation, 2011
- A $Ka$ -Band High-Gain Circularly Polarized Microstrip Antenna ArrayIEEE Antennas and Wireless Propagation Letters, 2010
- Broadband Circularly Polarized Crossed Dipole With Parasitic Loop Resonators and Its ArraysIEEE Transactions on Antennas and Propagation, 2010
- Dual-Ring Circularly-Polarized Microstrip Patch Array Using Hybrid FeedIEEE Transactions on Antennas and Propagation, 2009
- Study on Sequential Feeding Networks for Subarrays of Circularly Polarized Elliptical Dielectric Resonator AntennaIEEE Transactions on Antennas and Propagation, 2007
- Broadband high-efficiency circularly polarized active antenna and array for RF front-end applicationIEEE Transactions on Microwave Theory and Techniques, 2006
- Circularly polarized array antenna with corporate-feed network and series-feed elementsIEEE Transactions on Antennas and Propagation, 2005
- Single-feed circularly polarized microstrip ring antenna and arraysIEEE Transactions on Antennas and Propagation, 2000
- An experimental study on 2×2 sequential-rotation arrays with circularly polarized microstrip radiatorsIEEE Transactions on Antennas and Propagation, 1997