Planar amplifier array with improved bandwidth using folded-slots

@article{Tsai1994PlanarAA,
  title={Planar amplifier array with improved bandwidth using folded-slots},
  author={Hsinyu Tsai and Mark J. W. Rodwell and Richard Anthony York},
  journal={IEEE Microwave and Guided Wave Letters},
  year={1994},
  volume={4},
  pages={112-114}
}
Active antennas on semiconductor substrates often suffer limited bandwidth. We report on a relatively broadband quasi-optical amplifier cell and 4/spl times/4 array using folded-slot antennas, suitable for monolithic power combining. Two orthogonally polarized CPW-fed folded slots are coupled to the input and output ports of a simple resistive feedback MESFET amplifier. The peak effective isotropic power gain in the transmission mode is 11 dB @ 4.3 GHz with 10% bandwidth for the single cell, a… CONTINUE READING

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