Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Frederick H. Raab"'
Autor:
Frederick H. Raab
Publikováno v:
2022 IEEE/MTT-S International Microwave Symposium - IMS 2022.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24a560f1d9cddf7dffea87e2f0127fdd
https://doi.org/10.1109/ims37962.2022.9865595
https://doi.org/10.1109/ims37962.2022.9865595
Autor:
Frederick H. Raab
Publikováno v:
IEEE Microwave Magazine. 22:104-106
The IEEE Microwave Theory and Techniques Society (MTT-S) Technical Committee MTT-20 (originally MTT-17) was formed in 1997 to address the needs of some 25,000 RF engineers whose work was primarily at frequencies below 1 GHz. Fritz Raab and Clark Bell
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1f96e2e2f44eee248cf63dc33e8143b
https://doi.org/10.1109/mmm.2021.3064778
https://doi.org/10.1109/mmm.2021.3064778
Autor:
Frederick H. Raab
Publikováno v:
2020 50th European Microwave Conference (EuMC).
A prototype power amplifier (PA) using GaN FETs is developed for space-based surface-penetrating radar at 60 MHz. LDMOS FETs would typically be used at this frequency, but the need for space-qualified components mandates the use of GaN. A push-pull c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f545dd3d278506ef1623116d2d29039
https://doi.org/10.23919/eumc48046.2021.9338069
https://doi.org/10.23919/eumc48046.2021.9338069
Autor:
Andrei Grebennikov, Frederick H. Raab
Publikováno v:
IEEE Microwave Magazine. 19:99-115
Today, class-F amplification is a well-established technique for increasing the efficiency of RF power amplifiers (PAs). The increase in efficiency afforded by class F reduces power consumption and increases talk time, both of which are driving force
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a861659406171c71cebee7de29d392a
https://doi.org/10.1109/mmm.2018.2862838
https://doi.org/10.1109/mmm.2018.2862838
Autor:
Frederick H. Raab
Publikováno v:
IEEE Microwave Magazine. 19:16-21
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a94204c6dfacf560cfaba106ff4bc54
https://doi.org/10.1109/mmm.2018.2823240
https://doi.org/10.1109/mmm.2018.2823240
Autor:
Frederick H. Raab, Andrei Grebennikov
Publikováno v:
IEEE Microwave Magazine. 19:26-41
Improving the efficiency of vacuum-tube amplifiers by properly approximating the anode voltage and current waveforms was discussed and first demonstrated in the late 1910s. Researchers found that, if either the tube plate current or voltage is zero w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4d682c770d65be24f3dfcb642dda206
https://doi.org/10.1109/mmm.2018.2821062
https://doi.org/10.1109/mmm.2018.2821062
Autor:
Frederick H. Raab
Publikováno v:
2017 IEEE MTT-S International Microwave Symposium (IMS).
Nathan O. Sokal is best known for introducing the class-E high-efficiency power amplifier to our RF/microwave community. This presentation recalls a bit of his history, as well as my recollections of interactions with him in developing power amplifie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5eb39bf71483cde1d792eb0abae37d2d
https://doi.org/10.1109/mwsym.2017.8058852
https://doi.org/10.1109/mwsym.2017.8058852
Autor:
Frederick H. Raab
Publikováno v:
IEEE Microwave Magazine. 19:14-15
The articles in this special issue expand on a session at the 2017 IEEE Microwave Theory and Techniques Society International Microwave Symposium, focuses on Nathan Sokal and the class-E amplifier. It serves both as a memorial to Nat Sokal and an ove
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a75c396ae9fae5e8b0af5c971bd7622d
https://doi.org/10.1109/mmm.2018.2823239
https://doi.org/10.1109/mmm.2018.2823239
Autor:
Frederick H. Raab
Publikováno v:
2016 IEEE MTT-S International Microwave Symposium (IMS).
This RF-power module is a building block for a multi-kilowatt high-efficiency power amplifier system. The module employs five GaN-FET class-F RF power amplifiers with a low-loss Gysel splitter and combiner. Envelope Elimination and Restoration is use
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a91c6aeb329120788ad0ba17f3cebfb5
https://doi.org/10.1109/mwsym.2016.7540407
https://doi.org/10.1109/mwsym.2016.7540407
Publikováno v:
IEEE Microwave Magazine. 13:S22-S32
Chireix. Doherty. Kahn. These names are widely heard throughout the power amplifier (PA) industry today when the discussion turns to high-power, high-efficiency amplifiers. When one hears “the Doherty PA is operating at 6 dB output power backoff (O
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::126fbbc9c387e9cadc9b80b807db5735
https://doi.org/10.1109/mmm.2012.2216716
https://doi.org/10.1109/mmm.2012.2216716