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Published June 2002 | Version public
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A Waveguide Mode-Converter Feed for a 5-W, 34-GHz Grid Amplifier

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Abstract

We have demonstrated a compact waveguide mode converter that excites a combination of TE_(10) and TE_(30) modes for feeding a grid amplifier. The length of the mode converter is only 13mm. The effective transmitter power (ETP) at 34GHz is 5W, with a gain of 5.5dB and a power-added efficiency (PAE) of 21%. The supply voltage is 3V, with a bias current of 5.6A. These results are comparable to those reported earlier for the same grid-amplifier design measured in free space. A spurious oscillation with a broad radiation pattern was observed at 33.6GHz with an effective isotropic radiated power (EIRP) of 23mW. This oscillation was suppressed when the grid was operating at high power levels, and disappeared entirely at output powers above 4.5W.

Additional Information

© 2002 IEEE. Date of Current Version: 07 August 2002. The authors appreciate the support from the Army Research Office through the Caltech Quasi-Optic Power Combining MURI program.

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Eprint ID
27584
DOI
10.1109/MWSYM.2002.1012145
Resolver ID
CaltechAUTHORS:20111102-110312140

Funding

Caltech Quasi-Optic Power Combining MURI Program

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Created
2011-11-02
Created from EPrint's datestamp field
Updated
2021-11-09
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