U Kaatze and K Lautscham 1986 J. Phys. E: Sci. Instrum. 19 1046 doi:10.1088/0022-3735/19/12/014
U Kaatze and K Lautscham
Show affiliationsSimple circular cylindrical piston attenuators have been constructed which, unlike commercially available below cut-off attenuators, are operated in the aperiodic TM01 mode. The instruments provide broad-band measurements up to 15 GHz over an extended range of attenuation. The accuracy offered by these TM01 attenuators is +or-0.02 dB. Calibration and correction procedures are not needed. The TM01 mode attenuator is therefore an attractive alternative to the conventional TE11 attenuator, since the latter, matched to a nominal frequency, requires extensive calibration measurements if applied over a broad frequency band. The construction of the TM01 piston attenuator is presented and test measurements are described to verify the favourable properties of the device.
Issue 12 (December 1986)
U Kaatze and K Lautscham 1986 J. Phys. E: Sci. Instrum. 19 1046
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