# US 10,312,590 B2 · Small UWB antennas and method of designing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,590 B2 - Document ID: US10312590B2 - Status: Granted - Kind: B2 - Application number: 15/664,377 - Filed: 2017-07-31 - Published: 2019-01-31 - Granted: 2019-06-04 - Earliest claimed: 2017-07-31 - Assignees: The United States of America as represented by the Secretary of the Navy - Applicants: SPAWAR Systems Center Pacific - Inventors: Thomas O Jones, III - Web page: https://patentgrep.com/patent/US10312590B2 ## CPC - H01Q 5/25: Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems - H01Q 1/36: Structural form of radiating elements, e.g. cone, spiral, umbrella; {Particular materials used therewith}(H01Q1/08, H01Q1/14 take precedence) - H01Q 9/32: Vertical arrangement of element (H01Q9/40 takes precedence) - H01Q 11/08: Helical antennas - H01Q 13/02: Waveguide horns - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A method is provided for designing an ultra-wide band conical antenna having a bulb shape with a conical feed point having a predetermined input feed resistance. The method includes: choosing a charge distribution cone angle, ψ, for the predetermined input feed resistance; choosing the length of the charge distribution, κ; determining a desired resistance, capacitance and a Q-factor via a quasistatic antenna design algorithm based on ψ and κ; and selecting an ultra-wide band conical antenna design having a bulb shape with a conical feed point, from among the set of ultra-wide band conical antenna designs having a bulb shape with a conical feed point, that produces the desired resistance, capacitance and Q-factor. ## Claims ### Claim 1 A method for designing an ultra-wide band conical antenna comprising: choosing a charge distribution cone angle, ψ, for the predetermined input feed resistance; choosing a length of a charge distribution, κ; determining desired values for resistance, capacitance and Q-factor via a quasistatic antenna design algorithm based on ψ and κ; and selecting an ultra-wide band conical antenna design having a bulb shape with a conical feed point, from among a set of antenna designs that produces the desired values for resistance, capacitance and Q-factor. ### Claim 2 (depends on 1) The method of claim 1, wherein said choosing a charge distribution cone angle ψ, comprises choosing a linear charge distribution on the cone. ### Claim 3 (depends on 1) The method of claim 1, wherein said choosing a charge distribution cone angle ψ, comprises choosing a non-linear charge distribution on the cone. ### Claim 4 (depends on 1) The method of claim 1, wherein the ultra-wide band conical antenna design having a bulb shape with a conical feed point is selected from a set of antenna designs with a local minimized Q-factor. ### Claim 5 (depends on 1) The method of claim 1, wherein said selecting an ultra-wide band conical antenna design having a bulb shape with a conical feed point, is from a set of antenna designs with a predetermined resistance and minimized Q-factor. ### Claim 6 (depends on 1) The method of claim 1, wherein said selecting an ultra-wide band conical antenna design having a bulb shape with a conical feed point, is from a set of antenna designs with a predetermined capacitance and minimized Q-factor. ### Claim 7 (depends on 1) The method of claim 1, wherein said selecting an ultra-wide band conical antenna design having a bulb shape with a conical feed point, is from a set of antenna designs with a predetermined resistance and capacitance. ### Claim 8 An ultra-wide band conical antenna having a bulb shape with a conical feed point having a predetermined input feed resistance, comprising: a conical feed point having a cone angle and a length and a predetermined input feed resistance; and a bulb shape disposed on said conical feed point, and wherein said conical feed point is operable to distribute charge in a charge distribution cone angle, ψ, corresponding to the cone angle and to distribute charge in charge distribution length, κ, corresponding to the length for the predetermined input feed resistance, and wherein said conical feed point and said bulb shape have a desired value for resistance, capacitance and Q-factor via as determined by a quasistatic antenna design algorithm based on ψ and κ. ### Claim 9 (depends on 8) The ultra-wide band conical antenna of claim 8, wherein the charge distribution cone angle ψ, comprises a linear charge distribution on the cone. ### Claim 10 (depends on 9) The ultra-wide band conical antenna of claim 9, wherein said selecting an ultra-wide band conical antenna design having a bulb shape with a conical feed point, from among the set of ultra-wide band conical antenna designs having a bulb shape with a conical feed point, that produces the desired resistance, and a minimized Q-factor. ### Claim 11 (depends on 10) The ultra-wide band conical antenna of claim 10, wherein the predetermined input feed resistance is selected from the group consisting of 30 ohms, 32 ohms and 50 ohms. ### Claim 12 (depends on 8) The ultra-wide band conical antenna of claim 8, wherein the charge distribution cone angle ψ is a non-constant function of a height of the charge distribution. ### Claim 13 (depends on 12) The ultra-wide band conical antenna of claim 12, wherein the charge distribution is a linear function of the charge distribution height. ### Claim 14 (depends on 13) The ultra-wide band conical antenna of claim 13, wherein the predetermined input feed resistance comprises one of a group consisting of 30 ohms, 32 ohms and 50 ohms. ### Claim 15 (depends on 12) The ultra-wide band conical antenna of claim 12, wherein the charge distribution is a piece-wise constant function of the charge distribution height. ### Claim 16 (depends on 12) The ultra-wide band conical antenna of claim 12, wherein the charge distribution is a higher order polynomial charge distribution on the cone. ### Claim 17 (depends on 12) The ultra-wide band conical antenna of claim 12, wherein the ultra-wide band conical antenna having the bulb shape with the conical feed point is selected from among a set of ultra-wide band conical antenna designs having multiple different bulb shapes, that produces a desired resistance and a minimized Q-factor. ### Claim 18 (depends on 17) The ultra-wide band conical antenna of claim 17, wherein the predetermined input feed resistance is selected from the group consisting of 30 ohms, 32 ohms and 50 ohms. ### Claim 19 (depends on 8) The ultra-wide band conical antenna of claim 8, wherein the ultra-wide band conical antenna having the bulb shape with the conical feed point is selected from among a set of ultra-wide band conical antenna designs having multiple different bulb shapes. ### Claim 20 An ultra-wide band conical antenna having a bulb shape with a conical feed point having a predetermined input feed resistance, comprising: a conical feed point having a cone angle, a length and a predetermined input feed resistance; and a bulb shape disposed on said conical feed point, wherein said conical feed point and said bulb shape have a resistance, desired capacitance and a minimized Q-factor as determined by a quasistatic antenna design algorithm based on ψ and κ, wherein ψ is a charge distribution cone angle, wherein κ is a charge distribution length, and wherein the predetermined input feed resistance comprises one of the group consisting of 30, 32, and 50 ohms such that the ultra-wide band conical antenna's shape is generated by a cylindrically-symmetric charge distribution.