A miniature, MMIC one watt W-band solid-state transmitter

Stenger, E.; Sarantos, M.; Niehenke, Edward C.; Fudem, H.; Schwerdt, Carolin; Kuss, F.; Strack, D.; Hall, G.; Masti, J.

doi:10.1109/mwsym.1997.602825

Cited by 15 publications

(7 citation statements)

References 5 publications

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“…Higher power levels can be achieved using multichip modules with off-chip microstrip or waveguide combining networks, with the associated drawback of increased assembly. Researchers at TRW have reported a 2.4-W -band amplifier by combining eight chips in a waveguide structure [9]; a group at Northrop Grumman reported a 1-W -band module combining 16 chips [10]. At -band, researchers from Motorola have reported an eight-way module that generates 31 W [11].…”

Section: Introductionmentioning

confidence: 99%

Quasi-optical and spatial power combining

DeLisio¹,

York

2002

IEEE Trans. Microwave Theory Techn.

172

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Quasi-optical power-combining techniques have been developed to address fundamental limitations in solid-state devices and circuits. These techniques have been applied to oscillators, amplifiers, frequency-conversion components, and control circuits. This paper surveys progress in the development of quasi-optical array systems operating in the microwave and millimeter-wave regime, focusing primarily on the progress in power amplifiers.

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Section: Introductionmentioning

confidence: 99%

Quasi-optical and spatial power combining

DeLisio¹,

York

2002

IEEE Trans. Microwave Theory Techn.

172

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“…These devices switch between different line lengths or switch between different low-and high-pass filters to achieve the desired phase shift. Because of these comparatively lossy switches, the average loss of a -band 4-bit phase shifter that uses the best pHEMT switches is approximately 6.5 dB [2]. Another topology exists that uses distributed MEMS devices to change the phase velocity over a line to produce a phase shift, but the predicted loss of this phase shifter is still 5.1 dB at -band [3].…”

Section: Introductionmentioning

confidence: 99%

Ka-band RF MEMS phase shifters

Pillans

Eshelman

Malczewski

et al. 1999

IEEE Microw. Guid. Wave Lett.

117

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As the need for low-loss phase shifters increases, so does the interest in radio frequency (RF) MEMS as a solution to provide them. In this paper, progress in building low loss Ka-band phase shifters using RF MEMS capacitive switches is demonstrated. Using a switched transmission line 4-bit resonant phase shifter, an average insertion loss of 2.25 dB was obtained with better than 15-dB return loss. A similar 3-bit phase shifter produced an average insertion loss of 1.7 dB with better than 13-dB return loss. Both devices had a phase error of less than 13 in the fundamental states. To our knowledge, these devices represent the lowest loss Ka-band phase shifters reported to date.

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“…Amplitude noise in the bias supplies can also be upconverted to near-carrier phase noise. For our purpose, the origin of the noise is unimportant, and we simply describe the total excess noise contribution of each amplifier by a time-domain fluctuation so that (12) (note, is now a voltage gain). The total output signal is then given by…”

Section: Phase Noise In Combiner Systemsmentioning

confidence: 99%

Some considerations for optimal efficiency and low noise in large power combiners

York

2001

IEEE Trans. Microwave Theory Techn.

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This paper examines some relationships between important design parameters in large combiner systems and key performance objectives such as power, efficiency, noise, and graceful degradation. Results are derived for the combining efficiency of general combiner systems, and used to contrast spatial and corporate combiners and identify optimum combiner topology for a given device technology. The influence of array size on excess phase noise is quantified and shown to decrease with increase numbers of devices. Results are also presented for the degradation in combining efficiency due to statistical variations in amplifier characteristics, appropriate to large combiners, showing that phase errors are the dominant factor in power degradation.

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A miniature, MMIC one watt W-band solid-state transmitter

Cited by 15 publications

References 5 publications

Quasi-optical and spatial power combining

Quasi-optical and spatial power combining

Ka-band RF MEMS phase shifters

Some considerations for optimal efficiency and low noise in large power combiners

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