US 7,321,278 B2 | ||
Low profile ceramic RF filter including trap resonators and a decoupler | ||
Reddy Vangala, Albuquerque, N. Mex. (US) | ||
Assigned to CTS Corporation, Elkhart, Iowa (US) | ||
Appl. No. 10/550,523 PCT Filed Apr. 07, 2004, PCT No. PCT/US2004/010526 § 371(c)(1), (2), (4) Date Sep. 22, 2005, PCT Pub. No. WO2004/093239, PCT Pub. Date Oct. 28, 2004. |
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Claims priority of provisional application 60/460970, filed on Apr. 07, 2003. | ||
Prior Publication US 2006/0192634 A1, Aug. 31, 2006 | ||
Int. Cl. H01P 1/213 (2006.01); H01P 1/205 (2006.01) |
U.S. Cl. 333—134 [333/202; 333/206] | 12 Claims |
3. An antenna duplexer comprising:
a dielectric block having a first, a second and a third set of paired opposed sides and a central portion;
a first and a second antenna coupling electrode located on the dielectric block in the central portion;
a first section of the block extending between the first antenna electrode and a first end of the block;
a second section of the block extending between the second antenna electrode and a second end of the block, the second end
opposing the first end,
each of the first and second sections having a plurality of coupled resonators extending between the first set of paired opposed
sides, the plurality of coupled resonators being defined by a plurality of metallized through-holes extending between the
first set of paired opposed sides;
a decoupler located in the central portion of the dielectric block and being defined by one of the plurality of metallized
through-holes extending between the first set of paired opposed sides, the decoupler further being located between the first
and second antenna coupling electrodes; and
a relatively expansive metallized area located on the block for providing a reference potential, the block further comprising
a metallization extension on one of the sides of the first set of paired opposed sides, the metallization extension extending
between the decoupler and the relatively expansive metallized area.
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