# US 2014/0152401 A1 · Resonant Circuit with Improved Capacitor Quality Factor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152401 A1 - Document ID: US20140152401A1 - Status: Published application - Kind: A1 - Application number: 13/692,551 - Filed: 2012-12-03 - Published: 2014-06-05 - Earliest claimed: 2012-12-03 - Assignees: Space Systems/Loral, Inc. - Applicants: Space Systems/Loral, LLC - Inventors: Slawomir J. Fiedziuszko; Stephen D. Berry - Web page: https://patentgrep.com/patent/US20140152401A1 ## CPC - H03H 5/00: One-port networks comprising only passive electrical elements as network components - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) ## Abstract A resonant circuit, configured to operate at a resonant frequency, includes a first arrangement providing a first equivalent capacitance ‘C’ and a second arrangement providing a first inductance. The first arrangement includes a quantity of ‘n’ capacitive elements connected in parallel, n being at least two, each of the n capacitive elements having a nominal capacitance approximately equal to C/n. The resonant frequency may exceed 1 GHz, the first equivalent capacitance may be at least 3 pF, and a composite Q factor of the first arrangement may be greater than 800. Whereas a single capacitive element having a capacitance of C may exhibit a Q factor equal to ‘Q1’, the composite Q factor of the first arrangement may be equal to ‘Q2’ where Q2 is substantially higher than Q1. ## Claims ### Claim 1 A resonant circuit, configured to operate at a resonant frequency, and comprising: a first arrangement providing a first equivalent capacitance ‘C’ and a second arrangement providing a first inductance; the first arrangement comprising: a quantity of ‘n’ capacitive elements connected in parallel, n being at least two, each of the n capacitive elements having a nominal capacitance approximately equal to C/n. ### Claim 2 (depends on 1) The resonant circuit of claim 1, wherein at least one of the n capacitive elements has a fixed capacitance. ### Claim 3 (depends on 2) The resonant circuit of claim 2, wherein at least one of the n capacitive elements has a variable capacitance. ### Claim 4 (depends on 1) The resonant circuit of claim 1, wherein the resonant frequency is at least 1 GHz, the first equivalent capacitance is at least 3 pF, and a composite Q factor of the first arrangement is greater than 800. ### Claim 5 (depends on 4) The resonant circuit of claim 4, wherein the first arrangement is connected in parallel with the second arrangement. ### Claim 6 (depends on 4) The resonant circuit of claim 4, wherein the first arrangement is connected in series with the second arrangement. ### Claim 7 (depends on 4) The resonant circuit of claim 4, wherein at least one capacitive element is a varactor. ### Claim 8 (depends on 1) The resonant circuit of claim 1, wherein the resonant frequency is at least 1 GHz, the first equivalent capacitance is at least 12 pF, and a composite Q factor of the first arrangement is greater than 300. ### Claim 9 (depends on 1) The resonant circuit of claim 1, wherein a single capacitive element having a capacitance of C exhibits a Q factor equal to ‘Q1’, the composite Q factor of the first arrangement is equal to ‘Q2’, and Q2 is substantially higher than Q1. ### Claim 10 A resonant circuit, configured to operate at a resonant frequency, and comprising: a first arrangement providing a first capacitance and a second arrangement providing a first inductance; wherein the resonant frequency is at least 1 GHz, the first capacitance is at least 3 pF, and a composite Q factor of the first arrangement is greater than 800. ### Claim 11 (depends on 10) The resonant circuit of claim 10, the first arrangement comprising: a quantity of ‘n’ capacitive elements connected in parallel, n being at least two, each of the n capacitive elements having a nominal capacitance approximately equal to C/n. ### Claim 12 (depends on 11) The resonant circuit of claim 11, wherein at least one of the n capacitive elements has a fixed capacitance. ### Claim 13 (depends on 12) The resonant circuit of claim 12, wherein at least one of the n capacitive elements has a variable capacitance. ### Claim 14 (depends on 11) The resonant circuit of claim 11, wherein the resonant frequency is at least 1 GHz, the first equivalent capacitance is at least 3 pF, and a composite Q factor of the first arrangement is greater than 800. ### Claim 15 (depends on 11) The resonant circuit of claim 11, wherein the first arrangement is connected in parallel with the second arrangement. ### Claim 16 (depends on 11) The resonant circuit of claim 11, wherein the first arrangement is connected in series with the second arrangement. ### Claim 17 (depends on 11) The resonant circuit of claim 11, wherein at least one capacitive element is a varactor. ### Claim 18 (depends on 11) The resonant circuit of claim 11, wherein the resonant frequency is at least 1 GHz, the first equivalent capacitance is at least 12 pF, and a composite Q factor of the first arrangement is greater than 300. ### Claim 19 (depends on 11) The resonant circuit of claim 11, wherein a single capacitive element having a capacitance of C exhibits a Q factor equal to ‘Q1’, the composite Q factor of the first arrangement is equal to ‘Q2’, and Q2 is substantially higher than Q1. ### Claim 20 A resonant circuit, configured to operate at a resonant frequency, and comprising: a first arrangement providing a first equivalent capacitance ‘C’ and a second arrangement providing a first inductance; the first arrangement comprising: a quantity of ‘n’ capacitive elements connected in parallel, n being at least two, each of the n capacitive elements having a nominal capacitance approximately equal to C/n; wherein: a single capacitive element having a capacitance of C exhibits a Q factor equal to ‘Q1’, the composite Q factor of the first arrangement is equal to ‘Q2’, and Q2 is substantially higher than Q1.