Patent ID: 8680944

Claim:
A duplexer interfacing a receiver and a transmitter with a common antenna, the duplexer comprising: a transmit filter on a chip connected between the antenna and the transmitter, the transmit filter having a transmit passband; a receive filter on the chip connected between the antenna and the receiver, the receive filter having a receive passband different from the transmit passband; an annular sealing ring connected between a first surface of the chip and a first surface of a cap to form a sealed cavity between the chip and the cap; a support pillar extending between the first surface of the chip and the first surface of the cap to separate the chip and the cap, a support conductor being formed along the support pillar; and a conductive stripe extending across a portion of the first surface of the chip and a portion of the first surface of the cap between the transmit filter and the receive filter, the conductive stripe being electrically connected to ground, and providing at least one of magnetic shielding and capacitive shielding between the transmit filter and the receive filter, wherein the conductive stripe comprises: a first conductive stripe portion extending across the portion of the first surface of the chip from the annular sealing ring to the support pillar, the first conductive stripe portion being directly connected at one end to the annular sealing ring and at an opposite end to the support conductor; and a second conductive stripe portion extending across the portion of the first surface of the cap from the support pillar, the second conductive strip portion being connected at one end to the opposite end of the first conductive stripe portion via the support conductor.