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US 2018/0323485 A1Published application
Miniature ltcc coupled stripline resonator filters for digital receivers
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsSouleymane GNANOU, James M. HUGGETT
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Abstract
LTCC coupled stripline resonator filters for use as bandpass filters are implemented with combline topology or with interdigital topology. The filter bandwidths range from about 0.3 GHz to about 4.5 GHz, or higher, depending of the manufacturing limitations with frequency operation of about 0.1 GHz to about 100 GHz. The filters have a plurality of through plated vias extending through the filters and connecting the top and bottom ground layers to form electric walls thereby reducing the coupling between the adjacent resonators.
Claims18
A low temperature co-fired ceramic stripline resonator filter comprising
- a first layer configured as a ground layer comprising a metal;
- a second layer comprising a dielectric material;
- a third layer configured as a conductor layer comprising the metal and the dielectric material, the metal comprising a plurality of resonators comprising a first half of a stripline resonator pair arranged with an interdigital topology;
- a fourth layer comprising the dielectric material;
- a fifth layer configured as a conductor layer comprising the metal and the dielectric material, the metal comprising a plurality of resonators comprising a second half of the stripline resonator pair arranged with an interdigital topology;
- a sixth layer comprising the dielectric material;
- a seventh layer configured as a ground layer comprising a metal;
- wherein the first, second, third, fourth, fifth, sixth and seventh layers are assembled to form an RF filter having a width, a length, a thickness, a first end and a second end, and a first side and a second side;
- a plurality of perimeter through plated vias spaced apart along the length of the first side and along the length of the second side of the RF filter and extending through the RF filter from the first layer to the seventh layer creating a series of electric walls to contain electromagnetic fields inside the RF filter;
- and
- a plurality of through plated vias located between adjacent resonators and extending through the RF filter from the first layer to the seventh layer to create a series of electric walls thereby reducing the coupling between the two adjacent resonators.
8 more elements
A low temperature co-fired ceramic stripline resonator filter comprising
- a first layer configured as a ground layer comprising a metal;
- a second layer comprising a dielectric material;
- a third layer configured as a conductor layer comprising the metal and the dielectric material, the metal comprising a plurality of resonators comprising a first half of a stripline resonator pair arranged with an interdigital topology;
- a fourth layer comprising the dielectric material;
- a fifth layer configured as a conductor layer comprising the metal and the dielectric material, the metal comprising a plurality of resonators comprising a second half of the stripline resonator pair arranged with an interdigital topology;
- a sixth layer comprising the dielectric material;
- a seventh layer configured as a ground layer comprising a metal;
- wherein the first, second, third, fourth, fifth, sixth and seventh layers are assembled to form an RF filter having a width, a length, a thickness, a first end and a second end, and a first side and a second side;
- and
- a plurality of perimeter through plated vias spaced apart along the length of the first side and along the length of the second side of the RF filter and extending through the RF filter from the first layer to the seventh layer creating a series of electric walls to contain electromagnetic fields inside the RF filter.
7 more elements
A low temperature co-fired ceramic stripline resonator filter comprising
- a first layer configured as a ground layer comprising a metal;
- a second layer comprising a dielectric material;
- a third layer configured as a conductor layer comprising the metal and the dielectric material, the metal comprising a plurality of resonators comprising a first half of a stripline resonator pair arranged with a combline topology;
- a fourth layer comprising the dielectric material;
- a fifth layer configured as a conductor layer comprising the metal and the dielectric material, the metal comprising a plurality of resonators comprising a second half of the stripline resonator pair arranged with a combline topology;
- a sixth layer comprising the dielectric material;
- a seventh layer configured as a ground layer comprising a metal;
- wherein the first, second, third, fourth, fifth, sixth and seventh layers are assembled to form an RF filter having a width, a length, a thickness, a first end and a second end, and a first side and a second side;
- and
- a plurality of perimeter through plated vias spaced apart along the length of the first side and along the length of the second side of the RF filter and extending through the RF filter from the first layer to the seventh layer creating a series of electric walls to contain electromagnetic fields inside the RF filter.
7 more elements
Dependencies are inferred from the claim text.