Design of a Microstrip Fed Circularly Polarised Printed Antenna for an AEHF Phased Array : Improving Impedance Bandwidth of Printed Radiating Antennas Using the Proximity Coupling Technique
DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA
Pagination or Media Count:
This document reports the study of a circularly polarized printed antenna realised with LTCC material. This antenna is developed as a radiating element for a phased array with tile architecture for advanced EHF communication systems. Due to constraints imposed by the LTCC fabrication process and the application, techniques to improve the impedance bandwidth have been applied. These techniques are based on the proximity coupling of resonant structures to the driven antenna. The impedance bandwidth has been improved by a factor 5, and the required bandwidth for AEHF communications has been obtained. Arrays of four optimized radiating elements have been studied. The results are not satisfactory throughout the bandwidth, mainly due to the radiation of the microstrip feeding system required to generate the circular polarization. Another radiating element should be developed with a design suitable for an array for AEHF communications. A solution using the aperture-coupled technique to feed the radiating element can be applied to achieve this goal.
- Electrical and Electronic Equipment