ISSTT Proceedings

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VNA Measurements in the 0.75-1.1 THz Band

Authors:
J.L. Hesler, K. Hui, B. Foley, S. Durant, and T.W. Crowe
Abstract:
The design, development and testing of a state-of-the-art 0.75-1.1 THz Vector Network Analyzer Extender will be presented. The extender consists of a series of multipliers and mixers that are used to extend the frequency of Microwave Vector Network Analyzers (with operating frequency typically below 50 GHz). The transmitter consists of a ×27 multiplier chain generating an average output power of -24 dBm over the 0.75-1.1 THz band. This power is then fed into a bi-directional coupler that is used to sample the outgoing wave (reference mixer) and the test signal (measurement mixer). The coupler has an insertion loss of ~ 6 dB, yielding a test port power of -30 dBm typical. The receivers have a harmonic factor of 36, and consist of a multiplier chain driving a harmonic mixer. The conversion loss of these mixers is in the range of 20-25 dB. Transceiver measurements of the VNA system yielded a dynamic range of 60-70 dB over 3/4 of the frequency band, with reduced performance at the band edges. The dynamic range measurements were performed with a 10 Hz measurement bandwidth.
Categories:
Optics, Components
Year:
2011
Session:
7
Full-text:
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Page Number(s):
156