| 摘要 |
A single-block dielectric filter (100) which may provide both pass and stop bands for coupling an RF signal from transmitter (170) to an antenna (190) and an RF signal from the antenna (190) to a receiver (180). The dielectric, e.g. ceramic, filter (100) block is covered with conductive material and includes at least two holes (102, 104, 106, 108, 110, 112 and 114) each having an elongated cross section and being surrounded by capacitive strips not covered by the conductive material (e.g. 130, 131, 140 and 141 for hole 106), and electrodes (122, 120 and 124) coupled to receiver (180), transmitter (170) and antenna (190), respectively. A bracket (150) may be soldered to the ceramic filter (100) for mounting the ceramic filter in a radio transceiver. <IMAGE> |
