Abstract
Previous hybrid couplers have output phase difference that have either been 0°, 90°, or 180°. Other phase differences could only be realized using additional phase-shift elements. This increased circuit size and cost, and also degraded overall performance due to interconnecting mismatch losses. The proposed uniplanar arbitrary phase-difference coupler eliminates these additional components, thereby maintaining small size and good performance. Theoretical analysis is presented here together with measured results for two microstrip couplers for verification. © 2012 IEEE.
| Original language | English |
|---|---|
| Article number | 6171891 |
| Pages (from-to) | 1530-1539 |
| Journal | IEEE Transactions on Microwave Theory and Techniques |
| Volume | 60 |
| Issue number | 6 PART 1 |
| DOIs | |
| Publication status | Published - 2012 |
Research Keywords
- 3-dB hybrid coupler
- Arbitrary phase characteristics
- Butler matrix
- reflectometer
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