Wave transmission lines and networks – Long lines – Waveguide type
Patent
1989-02-15
1992-02-25
Gensler, Paul
Wave transmission lines and networks
Long lines
Waveguide type
333243, 333254, 333260, H01P 306, H01P 312
Patent
active
050917099
ABSTRACT:
A precision transmission line in the form of a short air line is disclosed. The short air line is approximately one-quarter wavelength at the middle frequency of the measurement frequency range. One embodiment comprises a very short coaxial air line. The inner conductor is threaded onto a mating inner conductor, such as the inner conductor of the network analyzer test port. For reliable interface at the other end of the inner conductor, a precision coaxial connector is preferably provided for connection to a device under test. The outer conductor is then attached coaxially to the inner conductor between the network analyzer test port and the device under test. Another embodiment comprises a waveguide for calibrations at higher measurement frequencies. In the case of the waveguide, locating structure is provided for properly orienting the waveguide with respect to the network analyzer test port and the device under test. The electrically short air line provides a very precise element for use in the offset-load, as well as other, calibrations of network analyzers.
REFERENCES:
patent: 2434509 (1948-01-01), Okress
patent: 2490622 (1949-12-01), Cork
patent: 3560029 (1971-02-01), Floyd, Jr.
patent: 3731160 (1973-05-01), Klein
patent: 4932673 (1990-06-01), Domnikov et al.
Gensler Paul
Hewlett--Packard Company
Milks, III William C.
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