GET THE APP

Compact Quadrature Hybrid Coupler For MRI Coil | SciTechnol

Journal of Electrical Engineering and Electronic TechnologyISSN: 2325-9833

All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.

Research Article, J Electr Eng Electron Technol Vol: 10 Issue: 6

Compact Quadrature Hybrid Coupler For MRI Coil

Abstract

This paper proposes the design of a compact quadrature hybrid coupler at the 300 MHz operating frequency for the Magnetic resonance imaging Birdcage coil. The desired 300 MHz operation frequency of the quadrature hybrid coupler has a wavelength of 1 meter, and then the physical size of the designed quadrature hybrid coupler will be very large. Therefore, we propose the design of a compact quadrature hybrid coupler, applying symmetrical bends in the design and reducing its physical size, maintaining the design performance in the frequency of operation, the magnitude balance below ± 0.4 dB and the phase balance below ± 0.3° by applying a specific substrate with losses. The type of the compact quadrature hybrid coupler is Branch-line hybrid and it was manufactured in micro strip board with FR4 substrate. The measured phase shift between the output ports is 90° ± 0.15° at 300 MHz. The measured magnitude balance at the output ports is ± 0.22 dB at 300 MHz. Consequently, the measured magnitudes at the output ports are -3.22 dB and -3.44 dB. The measured isolation between the input port and the isolated port is 23.2 dB at 300 MHz.

Keywords: Branch-line hybrid coupler; Compact design; MRI coil; PCB; Quadrature hybrid coupler.

Track Your Manuscript

Google scholar citation report
Journal of Electrical Engineering and Electronic Technology peer review process verified at publons

Recommended Conferences

Annual Microfluidics and Lab-on-Chip Congress

Amsterdam, Netherlands