VARIABLE Z0 ANTENNA DEVICE DESIGN SYSTEM AND METHOD
First Claim
1. A method of designing an antenna connected to a feed system including a radio frequency source, the method comprising:
- using an iterative antenna design algorithm on a computer where one or more antenna design parameters and a feed system characteristic impedance value are variables to achieve one or more antenna performance objectives;
varying said one or more antenna design parameters while varying said feed system characteristic impedance value until said one or more antenna performance objectives are achieved using said iterative antenna design algorithm; and
determining a feed system characteristic impedance value from the varied feed system characteristic impedance values which results in said one or more antenna performance objectives.
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Abstract
A variable Z0 impedance method (“Variable Z0”) for designing and/or optimizing antenna systems. The method provides that the value of an antenna'"'"'s feed system characteristic impedance or apparatus internal impedance (Z0) changes as a true variable quantity during the antenna system design or optimization methodology. The value is allowed to be determined by the methodology, because different values of Z0 result in different antenna system performance. It is applied to any set of performance objectives on any antenna system wherein apparatus internal or transmission line characteristic impedance is an explicit or implicit parameter. Variable Z0 is applied to any design or optimization methodology. Structures include Yagi-Uda arrays, Meander Monopoles, and transmission line Multi-Stub Matching Networks, and can incorporate Central Force Optimization or Biogeography Based Optimization or other optimization algorithms.
41 Citations
23 Claims
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1. A method of designing an antenna connected to a feed system including a radio frequency source, the method comprising:
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using an iterative antenna design algorithm on a computer where one or more antenna design parameters and a feed system characteristic impedance value are variables to achieve one or more antenna performance objectives; varying said one or more antenna design parameters while varying said feed system characteristic impedance value until said one or more antenna performance objectives are achieved using said iterative antenna design algorithm; and determining a feed system characteristic impedance value from the varied feed system characteristic impedance values which results in said one or more antenna performance objectives. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of designing an antenna connected to a feed system including a radio frequency source, the method comprising:
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choosing minimum and maximum feed system characteristic impedance values; using an iterative antenna design algorithm on a computer where one or more antenna design parameters and a feed system characteristic impedance value are variables to achieve one or more antenna performance objectives; varying said one or more antenna design parameters while varying feed system characteristic impedance values between the minimum and maximum feed system characteristic impedance values until said one or more antenna performance objectives are achieved using said iterative antenna design algorithm; and determining a feed system characteristic impedance value from the varied feed system characteristic impedance values which results in said one or more antenna performance objectives. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A computer program for designing an antenna connected to a feed system including a radio frequency source, the computer program comprising:
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an iterative antenna design algorithm configured so one or more antenna design parameters and a feed system characteristic impedance value are variables to achieve one or more antenna performance objectives; said antenna design parameters are varied in said design algorithm while varying the feed system characteristic impedance value until said one or more antenna performance objectives are achieved; and a feed system characteristic impedance value determined by said algorithm which results in said one or more antenna performance objectives. - View Dependent Claims (19, 20, 21, 22)
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23. An antenna connected to a feed system designed by a method comprising:
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choosing minimum and maximum feed system characteristic impedance values; using an iterative antenna design algorithm on a computer where antenna design parameters and a feed system characteristic impedance value are variables to achieve one or more antenna performance objectives; varying said antenna design parameters while varying feed system characteristic impedance values between the minimum and maximum feed system characteristic impedance values until said one or more antenna performance objectives are achieved using said iterative antenna design algorithm; determining a feed system characteristic impedance value from the varied feed system characteristic impedance values which results in said one or more antenna performance objectives; designing the feed system such that said feed system exhibits said determined feed system characteristic impedance value or an approximation of the determined feed system characteristic impedance value; determining which antenna design parameters result in said antenna performance objectives; and designing the antenna according to said determined antenna design parameters to achieve said one or more antenna performance objectives.
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Specification