Low-profile broadband Core-Isolator for multi-band module

Summary form only given, as follows. A novel broadband Core-Isolator for modules of multi-standard and multi-band mobile handsets has been developed successfully. A new circuit configuration for extending the isolation frequency band is proposed. A 1.5 × 0.9 × 0.4 mm³ Core-Isolator with two electrodes of asymmetrical structure has been fabricated, which is mounted on a module substrate with resonant elements. It has an insertion loss of 0.5dB and an isolation of 10dB at 824–915MHz which is twice wider than conventional one.