A Compact, High Power Capable, and Tunable High Directivity Microstrip Coupler
A coupler is an indispensable component to sample the forward and reflected power for the real-time radio frequency (RF) power monitoring system. The directivity of a coupler is a critical factor to achieve accurate RF power measurements. This paper proposes a microstrip coupler with a tunable high...
| Veröffentlicht in: | IEEE transactions on microwave theory and techniques. - 1998. - 64(2016), 10 vom: 16. Okt., Seite 3217-3223 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2016
|
| Zugriff auf das übergeordnete Werk: | IEEE transactions on microwave theory and techniques |
| Schlagworte: | Journal Article RF power monitoring directivity isolation magnetic resonance imaging (MRI) microstrip circuits microstrip coupler passive components |
| Zusammenfassung: | A coupler is an indispensable component to sample the forward and reflected power for the real-time radio frequency (RF) power monitoring system. The directivity of a coupler is a critical factor to achieve accurate RF power measurements. This paper proposes a microstrip coupler with a tunable high directivity circuit to accurately measure the reflected RF power. The directivity tuner composed of passive components adjusts phase and amplitude of the coupled RF signal, and cancel out the leakage signal from the RF input port at the coupled reflection port. The experimental results, which agree with simulation results, show that the microstrip coupler with the directivity tuner circuit has a compact size (~ 0.07 λg x 0.05 λg), high power capability (up to 1 kW), and high directivities (more than 40 dB) at operating frequency bands (f = 297.3 MHz, 400 MHz, and 447 MHz, respectively) for magnetic resonance imaging (MRI) applications |
|---|---|
| Beschreibung: | Date Revised 29.09.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 0018-9480 |
| DOI: | 10.1109/TMTT.2016.2602835 |