Abstract
A new broadband microstrip branch-line quadrature hybrid with very flat phase response is presented. The device is made by cascading four branch-line couplers with arbitrary power division. The novel design is based on the microstrip transposition of a broadband waveguide polariser [4]. Across a 32% bandwidth centred at 9.3 GHz, the RL and the IL are respectively ¡15 dB and ¡3 dB/¡4 dB; the phase difference is very flat, i.e., 90°±1:5°.
| Original language | English |
|---|---|
| Pages (from-to) | 227-237 |
| Number of pages | 10 |
| Journal | Progress In Electromagnetics Research C |
| Volume | 34 |
| Publication status | Published - 2012 |