### Abstract

This paper introduces a one-port method for estimating model parameters of vector network analyzer calibration standards. The method involves measuring the standards through an asymmetrical passive network connected in direct mode and then in reverse mode, and using these measurements to compute the S-parameters of the network. The free parameters of the calibration standards are estimated by minimizing a figure of merit based on the expected equality of the S-parameters of the network when used in direct and reverse modes. The capabilities of the method are demonstrated through simulations, and real measurements are used to estimate the actual offset delay of a 50-Ω calibration load that is assigned zero delay by the manufacturer. The estimated delay is 38.8 ps with a 1σ uncertainty of 2.1 ps for this particular load. This result is verified through measurements of a terminated airline. The measurements agree better with theoretical models of the airline when the reference plane is calibrated using the new estimate for the load delay.

Original language | English (US) |
---|---|

Article number | 7502079 |

Pages (from-to) | 2631-2639 |

Number of pages | 9 |

Journal | IEEE Transactions on Microwave Theory and Techniques |

Volume | 64 |

Issue number | 8 |

DOIs | |

State | Published - Aug 1 2016 |

### Fingerprint

### Keywords

- Delay
- impedance
- reflection standards
- scattering parameters
- vector network analyzer (VNA)

### ASJC Scopus subject areas

- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering

### Cite this

*IEEE Transactions on Microwave Theory and Techniques*,

*64*(8), 2631-2639. [7502079]. https://doi.org/10.1109/TMTT.2016.2580141

**One-Port Direct/Reverse Method for Characterizing VNA Calibration Standards.** / Monsalve, Raul A.; Rogers, Alan E E; Mozdzen, Thomas J.; Bowman, Judd.

Research output: Contribution to journal › Article

*IEEE Transactions on Microwave Theory and Techniques*, vol. 64, no. 8, 7502079, pp. 2631-2639. https://doi.org/10.1109/TMTT.2016.2580141

}

TY - JOUR

T1 - One-Port Direct/Reverse Method for Characterizing VNA Calibration Standards

AU - Monsalve, Raul A.

AU - Rogers, Alan E E

AU - Mozdzen, Thomas J.

AU - Bowman, Judd

PY - 2016/8/1

Y1 - 2016/8/1

N2 - This paper introduces a one-port method for estimating model parameters of vector network analyzer calibration standards. The method involves measuring the standards through an asymmetrical passive network connected in direct mode and then in reverse mode, and using these measurements to compute the S-parameters of the network. The free parameters of the calibration standards are estimated by minimizing a figure of merit based on the expected equality of the S-parameters of the network when used in direct and reverse modes. The capabilities of the method are demonstrated through simulations, and real measurements are used to estimate the actual offset delay of a 50-Ω calibration load that is assigned zero delay by the manufacturer. The estimated delay is 38.8 ps with a 1σ uncertainty of 2.1 ps for this particular load. This result is verified through measurements of a terminated airline. The measurements agree better with theoretical models of the airline when the reference plane is calibrated using the new estimate for the load delay.

AB - This paper introduces a one-port method for estimating model parameters of vector network analyzer calibration standards. The method involves measuring the standards through an asymmetrical passive network connected in direct mode and then in reverse mode, and using these measurements to compute the S-parameters of the network. The free parameters of the calibration standards are estimated by minimizing a figure of merit based on the expected equality of the S-parameters of the network when used in direct and reverse modes. The capabilities of the method are demonstrated through simulations, and real measurements are used to estimate the actual offset delay of a 50-Ω calibration load that is assigned zero delay by the manufacturer. The estimated delay is 38.8 ps with a 1σ uncertainty of 2.1 ps for this particular load. This result is verified through measurements of a terminated airline. The measurements agree better with theoretical models of the airline when the reference plane is calibrated using the new estimate for the load delay.

KW - Delay

KW - impedance

KW - reflection standards

KW - scattering parameters

KW - vector network analyzer (VNA)

UR - http://www.scopus.com/inward/record.url?scp=84978910833&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84978910833&partnerID=8YFLogxK

U2 - 10.1109/TMTT.2016.2580141

DO - 10.1109/TMTT.2016.2580141

M3 - Article

VL - 64

SP - 2631

EP - 2639

JO - IEEE Transactions on Microwave Theory and Techniques

JF - IEEE Transactions on Microwave Theory and Techniques

SN - 0018-9480

IS - 8

M1 - 7502079

ER -