Cheung, Chun-Tung and Hacker, Jonathan B. and Nagy, Gabor and Rutledge, David B. (2002) A Waveguide Mode-Converter Feed for a 5-W, 34-GHz Grid Amplifier. In: 2002 IEEE MTT-S International Microwave Symposium digest. IEEE , Piscataway, N.J, pp. 1523-1526. ISBN 0-7803-7239-5 http://resolver.caltech.edu/CaltechAUTHORS:20111102-110312140
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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.
|Item Type:||Book Section|
|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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|Official Citation:||Chun-Tung Cheung; Hacker, J.B.; Nagy, G.; Rutledge, D.B.; , "A waveguide mode-converter feed for a 5-W, 34-GHz grid amplifier ," Microwave Symposium Digest, 2002 IEEE MTT-S International , vol.3, no., pp.1523-1526, 2002 doi: 10.1109/MWSYM.2002.1012145 URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1012145&isnumber=21804|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||02 Nov 2011 18:30|
|Last Modified:||02 Nov 2011 18:31|
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