| 摘要 |
<p>The line (30) has conducting strips (32, 34) arranged on same surface (36) of a dielectric substrate, where the line is configured in the form of printed circuit board. The board presents structural discontinuities formed by portions (32B, 32C, 34B, 34C) of the strips. The discontinuities generate impedance jump and capacitive coupling between the strips for reproducing predetermined quarter-wave phase difference. An interdigitated capacitor for capacitive coupling is formed by conductive fingers (32D, 34D). The fingers are respectively connected to the strip through their ends. An independent claim is also included for a differential dipole filtering antenna comprising a higher-order differential filter.</p> |
