Abstract
A variable coupler has been designed and implemented utilizing two pieces of printed circuit boards (PCB) in edge-coupled configuration. The coupling amount is tuned by varying the spacing of two edge-coupled striplines. The proposed variable coupler by two sliding PCBs achieves 10 to 30 dB coupling with the spacing of 0.1 to 5.1 mm, while ensuring 50-Ω terminations at each port. The two PCBs have identical structures and dimensions, which are based on microstrip lines. Each PCB has been implemented with low-cost FR-4 dual-sided PCBs of which the thickness was 2.4 mm. The proposed coupling architecture with two flipped and overlapped PCBs provides a simple and intuitive implementation by having variable edge-coupled striplines.
| Original language | English |
|---|---|
| Pages (from-to) | 58-63 |
| Number of pages | 6 |
| Journal | International Journal of Microwave and Optical Technology |
| Volume | 15 |
| Issue number | 1 |
| State | Published - Jan 2020 |
Bibliographical note
Publisher Copyright:© 2020 IAMOT.
Keywords
- Coupled-line couplers
- Edge-coupled striplines
- Printed circuit boards
- Tunable couplers
- Variable couplers