Design of compact microstrip branchline couplers for broadband circularly polarized DRAs

Ogurtsov，Stanislav1; Koziel，Slawomir1; Cheng，Qingsha S.2

2017-09-26

978-1-5090-4311-8

2017 International Applied Computational Electromagnetics Society Symposium in China, ACES-China 2017

1-2

1-4 Aug. 2017

Suzhou, China

Institute of Electrical and Electronics Engineers Inc.

A systematic procedure for design of a broadband circularly polarized dielectric resonator antenna (CP DRA) is presented. An important stage of this process is the design of a microstrip branchline coupler that realizes a required excitation of a particular dual-input CP DRA over the frequency range of interest. This excitation is developed to improve the axial ratio, otherwise degraded due to coupling between the dual inputs of the DRA. The designed branchline couplers have smaller footprint than corresponding quadrature hybrids. At the final stage, simulation-based tuning is applied to the entire CP DRA-feed structure to control several figures of interest, e.g., broadside AR, reflection coefficient, and total radiated power over the frequencies, as well as to account for coupling and parasitic radiation. An example of a 2.2 GHz cylindrical CP DRA illustrates our approach which, to our understanding, is also suitable for different types of dual-input CP antennas.

axial ratio (AR) circularly polarized antenna computer-aided design (CAD) dielectric resonator antenna (DRA) dual-input antenna microstrip coupler unequal-split coupler

其他

英语

EI

Icelandic Centre for Research[174114051]

20174504375176

Circular polarization ; Computational electromagnetics ; Dielectric resonators ; Directional couplers ; Microwave antennas ; Microwave filters

Electricity and Magnetism:701 ; Electric Filters:703.2 ; Electromagnetic Waves:711 ; Electronic Components and Tubes:714 ; Waveguides:714.3 ; Computer Applications:723.5

2-s2.0-85032823111

Scopus

1.School of Science and Engineering,Reykjavik University,Reykjavik,Iceland
2.Dept. Electrical and Electronic Eng.,Southern University of Science and Technology,Shenzhen,China

Ogurtsov，Stanislav,Koziel，Slawomir,Cheng，Qingsha S.. Design of compact microstrip branchline couplers for broadband circularly polarized DRAs[C]:Institute of Electrical and Electronics Engineers Inc.,2017:1-2.