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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Rodgers, J. Guo, H. Nusinovich, G.S. Granatstein, V.L. |
| Copyright Year | 1999 |
| Description | Author affiliation: Inst. for Plasma Res., Maryland Univ., College Park, MD, USA (Rodgers, J.) |
| Abstract | Summary form only given. The phigtron is a millimeter wave, frequency-doubling amplifier that has been demonstrated to produce 360 kW peak power with bandwidth of 0.6%, saturated gain of 30 dB and electronic efficiency of greater than 35%. The input signal, injected into a Ku-band fundamental gyro-TWT input section, modulated a 60 kV, 25 A electron beam produced by a MIG-type gun. After transit through a drift section, prebunching in the electron beam excited the TE/sub 03/ mode at twice the input frequency in an output cavity with a measured total quality factor of /spl sim/600. A substantial range of magnetic field profiles was surveyed using a computer-controlled system in order to optimize operating parameters with respect to output power, bandwidth and efficiency. A set of operating conditions was established and the phase noise performance was measured for both the saturated (360 kW output power) and linear gain (100 kW output power) cases. The phase noise at 100 Hz from the carrier was observed to be as low as -40 dBc/Hz. Furthermore, a high degree of correlation was established between sources of technical noise (e.g., fluctuations in beam voltage, current and magnetic field) and this value. The intrinsic phase noise was estimated to be at least 10 dB/Hz lower at the same frequency offset. |
| File Size | 61601 |
| File Format | |
| ISBN | 0780352246 |
| ISSN | 07309244 |
| DOI | 10.1109/PLASMA.1999.829465 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1999-06-24 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Phase noise Magnetic field measurement Power generation Bandwidth Gain Electron beams Frequency estimation Power amplifiers Optical modulation Tellurium |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering |
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