W-band, 5W solid-state power amplifier/combiner

Schellenberg, J.M.; Watkins, E. T.; Micovic, M.; Kim, Bumjin; Han, Kyu Young

doi:10.1109/mwsym.2010.5517616

Cited by 40 publications

(13 citation statements)

References 5 publications

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“…Frequently, a single solid-state power amplifier (SSPA) module is not able to supply enough power necessary to combine various modules to achieve the required level. [1][2][3] In scientific research areas such as high-energy particle accelerators and plasma heating for controlled thermonuclear fusion, vacuum electronics amplifiers like Traveling Wave Tubes (TWTs), klystrons, and gyrotrons are used and combined. 4 Among the different configurations, 5,6 radial combiners exhibit a number of advantages over the corporate or chaintype combiners, mainly when a large number of ports (N) are considered.…”

Section: Introductionmentioning

confidence: 99%

High-performance 16-way Ku-band radial power combiner based on the TE01-circular waveguide mode

Montejo‐Garai

Saracho-Pantoja

Ruiz‐Cruz

et al. 2018

Review of Scientific Instruments

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This work presents a 16-way Ku-band radial power combiner for high power and high frequency applications, using the very low loss TE circular waveguide mode. The accomplished design shows an excellent performance: the experimental prototype has a return loss better than 30 dB, with a balance for the amplitudes of (±0.15 dB) and (±2.5°) for the phases, in a 16.7% fractional bandwidth (2 GHz centered at 12 GHz). For obtaining these outstanding specifications, required, for instance, in high-frequency amplification or on plasma systems, a rigorous step-by-step procedure is presented. First, a high-purity mode transducer has been designed, from the TE mode in the rectangular waveguide to the TE mode in the circular waveguide, with very high attenuation (>50 dB) for the other propagating and evanescent modes in the circular waveguide. This transducer has been manufactured and measured in a back-to-back configuration, validating the design process. Second, an E-plane 16-way radial power divider has been designed, where the power is coupled from the 16 non-reduced-height radial standard waveguides into the TE circular waveguide mode, improving the insertion loss response and removing the usual tapered transformers of previous designs limiting the power handling. Finally, both the transducer and the divider have been assembled to make the final radial combiner. The prototype has been carefully manufactured, showing very good agreement between the measurements and the full-wave simulations.

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Section: Introductionmentioning

confidence: 99%

High-performance 16-way Ku-band radial power combiner based on the TE01-circular waveguide mode

Montejo‐Garai

Saracho-Pantoja

Ruiz‐Cruz

et al. 2018

Review of Scientific Instruments

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“…The results presented in this work for the 2.5-2.7 THz chain indicate that this frequency range can easily be covered with the HIFI style versatile and broadband multiplier sources. Given the tremendous progress of high power GaN amplifiers [23], THz HEMT transistors [24], [25] or even CMOS amplifiers below 1 THz [26], it is predictable that the first and then the second stage of the present LO chain will be replaced in the coming years by transistor-based high-power drivers, much like the W-band Gunn oscillator was progressively replaced during the past decade by W-band synthesizers followed by W-band amplifiers. THz Schottky diode-based frequency multipliers will then reveal their full potential, being driven by power levels in the 3-10 mW range, where non-linearities can be better exploited for higher conversion efficiencies.…”

Section: Resultsmentioning

confidence: 99%

Frequency tunable electronic sources working at room temperature in the 1 to 3 THz band

et al. 2012

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Frequency tunable electronic sources working at room temperature in the 1 to 3 THz band," Proc. ABSTRACTCompact, room temperature terahertz sources are much needed in the 1 to 3 THz band for developing multi-pixel heterodyne receivers for astrophysics and planetary science or for building short-range high spatial resolution THz imaging systems able to see through low water content and non metallic materials, smoke or dust for a variety of applications ranging from the inspection of art artifacts to the detection of masked or concealed objects. All solid-sate electronic sources based on a W-band synthesizer followed by a high-power W-band amplifier and a cascade of Schottky diode based THz frequency multipliers are now capable of producing more than 1 mW at 0.9THz, 50 μW at 2 THz and 18 μW at 2.6 THz without the need of any cryogenic system. These sources are frequency agile and have a relative bandwidth of 10 to 15%, limited by the high power W-band amplifiers. The paper will present the latest developments of this technology and its perspective in terms of frequency range, bandwidth and power.

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“…A Cassegrain-type antenna with a gain greater than 50 dBi is commercially available [22]. In addition, a high-power, Wband amplifier with an output power of 5 W has been reportedly developed [23], [24]. Finally, the use of MMIC devices such as an integrated power amplifier has facilitated transmission distances of several kilometers for a 120-GHz onoff-keying radio with a data rate of 10 Gb/s [25].…”

Section: Discussionmentioning

confidence: 99%

Quadrature-Phase-Shift-Keying Radio-over-Fiber Transmission for Coherent Optical and Radio Seamless Networks

Kanno

Dat

Kuri

et al. 2013

IEICE Trans. Electron.

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We propose a coherent optical and radio seamless network concept that allows broadband access without deployment of additional optical fibers within an optical fiber dead zone while enhancing network resilience to disasters. Recently developed radio-over-fiber (RoF) and digital coherent detection technologies can seamlessly convert between optical and radio signals. A millimeter-wave radio with a capacity greater than 10 Gb/s and high-speed digital signal processing is feasible for this purpose. We provide a preliminary demonstration of a high-speed, W-band (75-110 GHz) radio that is seamlessly connected to an optical RoF transmitter using a highly accurate optical modulation technique to stabilize the center frequencies of radio signals. Using a W-band digital receiver with a sensitivity of −37 dBm, we successfully transmitted an 18.6 Gb/s quadrature-phase-shift-keying signal through both air and an optical fiber.

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W-band, 5W solid-state power amplifier/combiner

Cited by 40 publications

References 5 publications

High-performance 16-way Ku-band radial power combiner based on the TE01-circular waveguide mode

High-performance 16-way Ku-band radial power combiner based on the TE01-circular waveguide mode

Frequency tunable electronic sources working at room temperature in the 1 to 3 THz band

Quadrature-Phase-Shift-Keying Radio-over-Fiber Transmission for Coherent Optical and Radio Seamless Networks

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