Traceability to national standards for S-parameter measurements of waveguide devices from 110 GHz to 170 GHz

Establishing Traceability to the International System of Units for Scattering Parameter Measurements From 750 GHz to 1.1 THz

“…A typical value for L obtained for coaxial VNA systems is 0.002 dB/dB [36]. For VNAs with waveguide extender heads operating from 110 GHz to 330 GHz, the estimated non-linearity is 0.004 dB/dB, according to [9][10][11]. Thus, a conservative value of 0.01 dB/dB is used here for the purpose of this preliminary uncertainty budget.…”

“…Thus, a conservative value of 0.01 dB/dB is used here for the purpose of this preliminary uncertainty budget. The equivalent standard uncertainty, u(L), is established following the procedures given in [36]: (9) From equations (6), (8) and (9), the combined standard uncertainty for the transmission measurements, u(T), is evaluated following [24]: (10) Therefore, this value can be considered the CMC standard uncertainty for transmission measurements (i.e. S 21  and S 12 , in dB).…”

“…from 110 GHz to 330 GHz [9][10][11]. The program has now established a facility to provide traceable S-parameter (i.e.…”

Traceability to national standards for S-parameter measurements in waveguide at frequencies from 220 GHz to 330 GHz

“…The work described in this paper represents an extension of previous work in this area [2,3] and forms part of the on-going strategy to put in place primary national measurement capabilities for waveguide operating at millimeter-and submillimeter-wave frequencies (110 GHz to 1.1 THz). The paper describes the work that has been undertaken to extend the facilities to cover the 220 GHz to 330 GHz waveguide band (WR-03, [4]).…”

Accurate measurement of millimetre-wave phase-shift from 220 to 325 GHz using dual-channel system

“…A beadless coaxial air line can be used as the microwave phase-shift reference standard [8]. The expanded uncertainty of transmission phase-shift measurement for a 20 dB attenuator is estimated to be 0.868 at 110 -170 GHz using a vector network analyser (VNA) [9]. In this Letter, the design of a 220 -325 GHz phase-shift measurement system is presented.…”